Decoration of Carbon Nanotubes with Cerium (IV) Oxide
Cerium (IV) oxide (ceria) nanoparticles, 6–10 nm in size, supported on carbon nanotubes (CNTs) were prepared by a chemical reaction between Ce(NO3)3 and NaOH. The effective processing parameters of ceria particles size were discussed. CNTs/CeO2 hybrids were characterized by transmission electron mic...
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Інститут хімії поверхні ім. О.О. Чуйка НАН України
2011
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| Cite this: | Decoration of Carbon Nanotubes with Cerium (IV) Oxide / S.Ya. Brichka, I.B. Yanchuk, A.A. Konchits, S.P. Kolesnik, A.V. Yefanov, A.V. Brichka, N.T. Kartel // Хімія, фізика та технологія поверхні. — 2011. — Т. 2, № 1. — С. 34-40. — Бібліогр.: 29 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859715421399154688 |
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| author | Brichka, S.Ya. Yanchuk, I.B. Konchits, A.A. Kolesnik, S.P. Yefanov, A.V. Brichka, A.V. Kartel, N.T. |
| author_facet | Brichka, S.Ya. Yanchuk, I.B. Konchits, A.A. Kolesnik, S.P. Yefanov, A.V. Brichka, A.V. Kartel, N.T. |
| citation_txt | Decoration of Carbon Nanotubes with Cerium (IV) Oxide / S.Ya. Brichka, I.B. Yanchuk, A.A. Konchits, S.P. Kolesnik, A.V. Yefanov, A.V. Brichka, N.T. Kartel // Хімія, фізика та технологія поверхні. — 2011. — Т. 2, № 1. — С. 34-40. — Бібліогр.: 29 назв. — англ. |
| collection | DSpace DC |
| container_title | Хімія, фізика та технологія поверхні |
| description | Cerium (IV) oxide (ceria) nanoparticles, 6–10 nm in size, supported on carbon nanotubes (CNTs) were prepared by a chemical reaction between Ce(NO3)3 and NaOH. The effective processing parameters of ceria particles size were discussed. CNTs/CeO2 hybrids were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), Raman and electron paramagnetic resonance (EPR) spectroscopy. SAED and Raman spectroscopy showed that the CeO2 particles had a cubic crystal structure. EMR spectroscopy showed two paramagnetic signals related to CNTs and a third one belonging to paramagnetic defects of CeO2.
Наночастинки оксиду церію (IV) розміром 6-10 нм одержано на вуглецевих нанотрубках (ВНТ) за хімічною реакцією між Се(NО3)3 і NaOH. Встановлено ефективні параметри синтезу наночастинок оксиду церію. Нанокомпозити ВНТ/СеО2 охарактеризовано за допомогою трансмісійної електронної мікроскопії (ТЕМ), електронографії, КР- та ЕПР-спектроскопії. Методами електронографії і КР-спектроскопії виявлено кубічну кристалічну структуру СеО2. ЕПР-спектроскопія показала, що два парамагнітних сигнали мають відношення до ВНТ, а третій обумовлений парамагнітними дефектами CeO2.
Наночастицы оксида церия (IV) размером 6-10 нм получены на углеродных нанотрубках (УНТ) в результате химической реакции между Се(NО3)3 и NaOH. Установлены эффективные параметры синтеза наночастиц оксида церия. Нанокомпозиты УНТ/СеО2 охарактеризованы с помощью трансмиссионной электронной микроскопии (ТЭМ), электронографии, КР- и ЭПР-спектроскопии. Методами электронографии и КР-спектроскопии установлена кубическая кристаллическая структура CeO2. ЭПР-спектроскопия показала, что два парамагнитных сигнала имеют отношение к УНТ, а третий обусловлен парамагнитными дефектами CeO2.
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Хімія, фізика та технологія поверхні. 2011. Т. 2. № 1. С. 34–40
_____________________________________________________________________________________________
* corresponding author yanchuk@isp.kiev.ua
34 ХФТП 2011. Т. 2. № 1
UDC 544.16
DECORATION OF CARBON NANOTUBES
WITH CERIUM (IV) OXIDE
S.Ya. Brichka1, I.B. Yanchuk2*, A.A. Konchits2, S.P. Kolesnik2, A.V. Yefanov2,
A.V. Brichka1, N.T. Kartel1
1Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
17 General Naumov Street, Kyiv 03164, Ukraine
2Lashkarev Institute of Semiconductor Physics of National Academy of Sciences of Ukraine
41 Nauky Ave., Kyiv 03028, Ukraine
Cerium (IV) oxide (ceria) nanoparticles, 6–10 nm in size, supported on carbon nanotubes (CNTs)
were prepared by a chemical reaction between Ce(NO3)3 and NaOH. The effective processing parameters
of ceria particles size were discussed. CNTs/CeO2 hybrids were characterized by transmission electron
microscopy (TEM), selected area electron diffraction (SAED), Raman and electron paramagnetic reso-
nance (EPR) spectroscopy. SAED and Raman spectroscopy showed that the CeO2 particles had a cubic
crystal structure. EMR spectroscopy showed two paramagnetic signals related to CNTs and a third one
belonging to paramagnetic defects of CeO2.
INTRODUCTION
Chemical modification of carbon nanotubes
leads to changes in their physical and chemical
properties [1, 2]. Recent studies on corrosion be-
havior of Zn deposits containing nanoparticles
reported that the content of CNTs in the deposits
improved the corrosion resistance as compared to
zinc coating. In many cases the CNTs act as
physical barrier to the corrosion process by filling
in crevices, gaps, and micro holes on the surface
of deposit [3]. The results [4] showed that addi-
tion of CNTs to the deposition process of nickel
significantly increased its resistance to corrosion.
The improvement in corrosion resistance is due to
the CNTs acting as physical barriers to corrosion
process by filling in crevices, gaps and micron
holes on the surface of nickel coating. Another
reason is that CNTs evenly distributed in the
nickel coating increase corrosion potential of the
composite coating towards more positive values
restricting localized corrosion and result in more
homogenous corrosion.
Replacement of extremely toxic anticorrosive
pigments (chromates, vanadates and nitrates) in
ecologically friendly analogues is a major chemi-
cal problem [5]. Cerium compounds show satis-
factory results in the protection of iron, alumin-
ium and other metals from corrosion [6, 7]. There
are also other spheres where cerium oxide is used.
Cerium oxide is a catalyst in the oxidation of CO
and NO that is important for cleaning exhaust
gases and in other technological processes [8, 9].
The catalytic activity of ceria for H2 and CO pro-
duction from fuels is described in [10]. Cerium
oxides are used in fuel cells as solid state conduc-
tors [11]. Ceria adsorbents are used for the re-
moval of toxic Cr (VI) from water with an ad-
sorption capacity of 30.2 mg·g-1 and in medicine
[12, 13]. The use of ceria to sense molecular oxy-
gen has been investigated [14]. Ceria is a good
polishing material which has been used commer-
cially [15]. Cerium oxide powders are often used
as fillers in polymers and in ceramics [16, 17].
Combining the effect of CNTs and cerium
oxide is expected to produce highly efficient en-
vironmentally friendly anti-corrosion pigments.
The purpose of our work is the synthesis of
CNT/CeO2 hybrids and testing them as anticorro-
sive pigments.
EXPERIMENTAL
Sample preparation. Certificated catalytic
multiwalled carbon nanotubes (CNTs, Nanothinx
S.A.) having a diameter of 12–31 nm, 15–35
walls and 97% purity (about 2% is iron catalyst
and less 1% is pyrolytic carbon) were used. CNTs
were modified by the following reaction
4Ce(NO3)3+12NaOH+O2
air=4CeO2+12NaNO3+6H2O.
6.25 g of CNTs was placed in about 15 ml of dis-
tilled water. Then 4 ml 0.5M (16.3 ml 1M)
Decoration of Carbon Nanotubes with Cerium (IV) Oxide
_____________________________________________________________________________________________
ХФТП 2011. Т. 2. № 1 35
Ce(NO3)3 solution was added. Under mixing 6 ml
1M (24.5 ml 2M) NaOH solution was added until
the pH was 8–9. The solid was filtered, rinsed and
dried at 383 K. Two samples of CNTs/CeO2
(5.2%) and CNTs/CeO2 (31%) with different con-
tent of ceria were prepared.
Corrosion testing. The anticorrosion proper-
ties of CNTs/CeO2 pigments were tested in an
amine covering. Dispersed pigment covering was
placed on a panel of 2024-T3 aluminium scav-
enged by a standard four bath clearing process
and scribed at widths of approximately 2 mm.
Corrosion tests of the panels were carried out in
freely aerated 3.5% NaCl solution for 3000 h to-
gether with SrCrO4 reference pigment. After the
test, the bottom halves of the panels were stripped
for visual inspection.
Samples characterization. The carbon nano-
tubes were identified by transmission electronic
microscope (JEM-100CXII). A crystalline struc-
ture of samples was verified by the selected area
electron diffraction pattern. The Raman spectra
were detected using a double monochromator, a
cooled photomultiplier employing standard pho-
ton counting technique, and DPSS laser at
532 nm for excitation. Estimated accuracy of de-
termining the peak position was of 1 cm-1. Elec-
tron magnetic resonance measurements were car-
ried out at the temperature range of 35–300 K
using X-band (microwave frequency ν=9.5 GHz)
electron paramagnetic resonance spectrometer
(Radiopan X-2244) with 100 kHz modulation of
magnetic field. Estimated accuracy of the deter-
mining the g-factor was of ±5×10−4 and ±3×10−2
approximately for the narrow and broad lines,
respectively. The relative accuracy of EMR inten-
sity measurements was of ±30%.
RESULTS AND DISCUSSION
Formation of ceria. The ultrafine CeO2
powders were synthesized by using flash combus-
tion, mechanochemical processing, co-
precipitation, homogeneous precipitation, electro-
chemical synthesis, hydrothermal, and sol-
vothermal processes. Recently a significant ad-
vancement has been made in developing envi-
ronmentally friendly and economically efficient
ways of producing controlled ceria nanostructures
via aqueous-phase synthesis method. Polyhedra,
rods, wire, cubes, sphere, tadpole-shaped wire,
triangular plate, and hollow structure, nanotube-
like structure of CeO2 are selectively obtained by
changing conditions [18]. Often synthesis of
nanosized CeO2 carry out the alcohol aqueous
environment. We have chosen exclusively the
neutral aqueous-phase synthesis method in order
to make the scaling easy.
Photos of electronic images of CNTs are pre-
sented in Fig. 1 which displays the characteristics
of CNTs described in the experimental part.
a
b
c
d
Fig. 1. TEM images of initial CNTs (a,b), and CNTs
modified by ceria of 5.2% (c) and 31% mass. (d)
S.Ya. Brichka, I.B. Yanchuk, A.A. Konchits et al.
_____________________________________________________________________________________________
36 ХФТП 2011. Т. 2. № 1
The photos show that nanotubes form con-
glomerates. The electronic images (Fig. 1c,d) of
modified CNTs testify to particles which decorate
them. SAED indicates the rings pattern of nanopar-
ticles that can be indexed using the face-centered
cubic polycrystalline structure of CeO2. Diffusive-
ness signals of weak crystallization and influence
of dimensional effect. The size of 6–10 nm parti-
cles fluctuates in a range according to TEM.
Raman spectroscopy of carbon nanotubes.
A spectrum of initial CNTs (Fig. 2a,1) consists of
two clear separate bands – D 1352 cm-1 and
G 1579 cm-1 with the intensity ratio ID/IG = 0.38.
1200 1400 1600 1800
1579
1352
1580
In
te
ns
ity
, a
.u
.
Raman shift, cm-1
1 1
2
a
300 350 400 450 500 550 600
1
466
452
In
te
ns
ity
, a
.u
.
Raman shift, cm-1
2
b
Fig. 2. Raman spectra of CNTs (1), CNTs modified by
ceria of 31% mass. (2) in "carbon" region (a);
ceria single crystal (1) and CNTs modified by
ceria of 31% mass. (2) in "ceria" region (b)
The G peak is usually assigned to zone centre
phonons of E2g symmetry and the D peak, which
is the breathing mode of A1g symmetry, involves
phonons near the K zone boundary of
sp2-hybridizing carbon. After depositions of ceria,
a spectrum of modified CNTs (Fig. 2a,2) has D-
band 1352 cm-1 and G-band 1580 cm-1 with the
ID/IG = 0.26.
The Raman spectra for CNTs synthesized by
matrix method have bands at 1302 and 1590 cm-1
that for disordered graphite are located in the
range of 1300–1350 and 1570–1585 cm-1 [19].
The increasing width of G-peak from 37 to
46 cm-1 for modified CNTs leads to the decreas-
ing in ID/IG. As G-peak broadening is detected,
the bond-angle distortion at the carbon atom in
six fold aromatic rings can be explained by the
influence of synthetic procedure and ceria inter-
action with carbon surface of the nanotubes.
CNTs decorated with 31% CeO2 show clear
Raman signal in the "ceria region". It was impos-
sible to detect the ceria signal of CNTs with 5.2%
mass. CeO2 due to small amount of ceria clusters
and their high dispersion. Raman spectra have
shown a strong peak at 452 cm-1 with full width at
half maximum (Г) of 26.5 cm-1 (Fig. 2b,2). The
peak is related to F2g mode of СеО2 fluorite struc-
ture what corresponds to SAED data. The Raman
peak of СеО2 single crystal is much narrower
(Г=13.5 cm-1) and has much higher peak position
at 466 cm-1 (Fig. 2b,1). A significant downshift of
14 cm-1 and broadening of 13 cm-1 of F2g mode as
compared to the bulk ceria indicate the presence
of nanosized crystals [20, 21]. We used a correla-
tions Г = 10 + 124.7/dg between Г and grain size
dg for estimation of ceria nanocrystal size. The
data on the size of CeO2 particles obtained from
TEM and Raman spectroscopy (dg = 7.6 nm) cor-
relate. The main reason for broadening of F2g
mode is disorder in the oxygen sublattice result-
ing grain size-induced non-stoichiometry. There-
fore, we estimated the defect concentration to be
about 8×1020 cm-3.
Influence of synthesis conditions on ceria
particles size. By means of synthesis of CeO2
from CeCl3 at 283 K the particles of about 6 nm
are obtained on oxidized carbon nanotubes
through a stage of heating at 723 K. What pre-
cipitating cerium hydroxide in more alkaline so-
lution or carrying out the reaction at 293 K, the
average size of particles increases to 10–15 nm
[22]. By a similar technique CeO2 nanoparticles
in the size of 3–8 nm are synthesized being
placed on two-layer carbon nanotubes [23]. CeO2
with average grain size of 4 nm was synthesized
Decoration of Carbon Nanotubes with Cerium (IV) Oxide
_____________________________________________________________________________________________
ХФТП 2011. Т. 2. № 1 37
from Ce(NO)3 and NaOH in alcohol aqueous so-
lution (Valcohol:Vwater=1:1) with high-intensity ul-
trasonic radiation at room temperature [24].
We synthesized the cerium oxide particles of
6–10 nm corresponding to those described in sci-
entific works. It should be point out that the non-
templating synthesis reduces the cost of CeO2.
When using special additives, ultrasonic process-
ing and other expensive approaches [18], it is
possible to make the size of particles one-half of
initial one.
Authors of [22] have come out with the as-
sumption that oxygen chemisorbed atoms on
CNTs are the formation centers of oxide nanopar-
ticles. It is obvious that uniformity of CNT deco-
ration [23, 24] contradicts the nature of their sur-
face. When carbon oxidation of nanotubes occurs,
first of all a reaction proceeds with participation
of graphene defects (the ends of nanotubes and
non-integral sites of their surface) that would lead
to selectivity of the centers of CeO2 adsorption. In
our opinion, one of the formation reasons of
nanosized ceria is templating action of CNTs sub-
strate. Nanotubes have nanosized, closed surface,
with high degree of curvature and with set of
heterogeneous contacts. These properties really
can favorably influence on the formation of small
oxide particles.
EPR spectroscopy of carbon nanotubes. In-
tensive and broad ∆Hpp≈1.5 kG EPR signals with
g≈2.15 caused by the presence of residual iron
catalytic nanoparticles are observed in of samples
both CNTs and modified CNTs (Fig. 3).
0 1500 3000 4500 6000
-1000
0
1000
E
M
R
s
ig
na
l,
a.
u.
Magnetic field, G
2
1
Fig. 3. EPR spectra of CNTs (1) and those modified by
ceria of 31% mass. (2) at 300 K
Narrower EMR lines ∆Hpp≈70 G of smaller
intensity caused by the presence of carbon-related
defects are also observed in the samples (Fig. 3,
spectra central part). The value of g-factor for
these defects (2.003) is typical of the carbon dan-
gling bonds. We will disregard the influence of
metal catalysts on EPR signal but focus on car-
bon-related ones.
In order to obtain more information about the
carbon-related defects, we studied their behavior
depending on the temperature (Fig. 4).
3 3 0 0 3 4 5 0 3 6 0 0
-8 0 0
0
8 0 0
E
M
R
s
ig
na
l,
a.
u.
M a g n e tic f ie ld , G
3
2
1G a in :4
Fig. 4. EPR spectra of CNTs at 25 (1), 70 (2) and
300 K (3)
At low temperatures the shape of the carbon
related EPR line is complicated. It can be de-
scribe as a sum of two broad ∆Hpp≈50 G and nar-
row ∆Hpp≈7 G contributions to the profile width
at 25 K (Fig. 4, 1). The broad part does not
change roughly the line width within the 25 to
300 K temperature range. The line width of nar-
row part increases gradually due to elevation of
spin relaxation processes at high temperatures.
The line widths of both contributions are
equal at room temperature and form a single con-
tour of EPR absorption with a Lorentz line shape
(Fig. 4, 3).
The EPR integral intensity follows the Curie
law (I∼С/T) between 25 and 100 K specifying the
mainly localized character of the paramagnetic
centers. A visible growth of I (T) is sharply
slowed down at Т < 25 K what is caused partly by
the saturation effects due to sudden decreasing of
the spin relaxation rate below 20 K [25].
We believe that a principal cause of the EPR
spectrum modification is the interaction of the
paramagnetic subsystem of free carriers with the
localized defects (carbon dangling bonds) in the
nanotubes structure [26]. In this model, the EPR
line width is formed by the interaction between
subsystems and grows gradually as the tempera-
ture increases due to spin relaxation contribution
S.Ya. Brichka, I.B. Yanchuk, A.A. Konchits et al.
_____________________________________________________________________________________________
38 ХФТП 2011. Т. 2. № 1
of free carriers [27]. From the described point of
view the presence of broad part to EPR contribu-
tion at low T (Fig. 4, 1) indicated the existence of
an additional broadening mechanism due to either
an interaction with other impurities [28] or differ-
ent acting to the inner and outer nanotube sides
[25]. The exchange coupling model also forecasts
the Pauli contribution in the paramagnetic suscep-
tibility at high T and the Curie law at low T.
In the modified CNTs system one more EPR
signal with close g-value 2.0028 is observed at
room temperature (Fig. 5, 2).
3300 3375 3450 3525
-150
0
150
E
M
R
s
ig
na
l,
a.
u.
Magnetic field, G
Line 2
Line 1
(2)Gain:5
(1)
Fig. 5. EPR spectra of CNTs modified by ceria of 31%
mass. at 300 (1) and 70 K (2)
The line width of the signal depends on the
oxygen atmosphere content so values of ∆Hpp = 4,
5 and 8 G change in evacuation. The signal be-
longs to defects of CeO2 structure [29]. It is not
possible to track down the temperature behavior
of this signal because it masks more intensive
EPR signal (line 1) of the nanotubes (Fig. 4). A
total concentration of the paramagnetic centers
for the modified sample is Ns≈ 1020 cm-3.
Anticorrosion properties of modified carbon
nanotubes. Panels containing chromate,
CNTs/CeO2 (5.2%) and CNTs/CeO2 (31%) prim-
ers were used for the corrosion test. Damage pro-
tection is demonstrated by results of corrosion
exposure of scribed samples are shown by all
primers. After 3000 h in salt spray chamber of
chromate panel, the scribe on the panel remained
shiny with no visible sign of corrosion. The
CNTs/CeO2 (5.2%) panel did not show signifi-
cant signs of corrosion on the scribe but it was
not as shiny as that of the chromate panel. The
CNTs/CeO2 (31%) panels showed visual indica-
tion of corrosion at 18%. We think that the speed
of ceria oxide releasing on metal surface plays a
critical role in the anticorrosion effect. Additional
studies will be done to understand the anticorro-
sion properties of the pigments. These results in-
dicate a reasonable corrosion inhibition for
CNTs/CeO2 specimens.
CONCLUSIONS
The ceria nanoparticles supported on carbon
nanotubes about 6–10 nm were synthesized by
chemical reaction between Ce(NO3)3 and NaOH.
The synthesis was realized in aqueous solution at
room temperature that reduces the cost of the
preparation procedure of nanosized ceria. EPR
spectroscopy showed two paramagnetic signals of
CNTs and the third one belonging to paramag-
netic defects of CeO2. The CNTs/CeO2 (5.2%)
could be used as a substrate preparation compo-
nent to replace the currently utilized chromate
containing surface treatments and provide the
basis for long lasting coating system for alumin-
ium alloys.
ACKNOWLEDGEMENTS
Thanks to PPG Industries, Inc. corporation
for financial support.
REFERENCES
1. Brichka S.Ya., Prikhod’ko G.P., Brichka A.V.,
Kislii Yu.A. Synthesis of bimodified carbon
nanotubes – a nanocomposite material //
Inorg. Mater. – 2004. – V. 40, N 12. –
P. 1276–1279.
2. Brichka S.Ya., Prikhod’ko G.P., Brichka A.V.
et al. Physicochemical properties of multi-
layer N-containing carbon nanotubes // Russ.
J. Phys. Chem. – 2004. – V. 78, N 1. –
P. 121–125.
3. Chen X.H., Chen C.S., Xiao H.N. et al. Cor-
rosion behavior of carbon nanotubes–Ni com-
posite coating // Surf. Coat. Technol. –
2005. – V. 191, N 2–3. – P. 351–356.
4. Praveen B.M., Venkatesha T.V., Arthoba
Naik Y., Prashantha K. Corrosion studies of
carbon nanotubes–Zn composite coating //
Surf. Coat. Technol. – 2007. – V. 201,
N 12. – P. 5836–5842.
5. Amirudin A., Thierry D. Evaluation of anti-
corrosive pigments by pigment extract stud-
ies, atmospheric exposure and electrochemi-
cal impedance spectroscopy // Prog. Org.
Coat. – 1995. – V. 25, N 4. – P. 339–355.
6. Phani A.R., Gammel F.J., Hack T., Haefke H.
Enhanced corrosion resistance by sol-gel-
based ZrO2-CeO2 coatings on magnesium al-
loys // Mater. Corros. – 2005. – V. 56, N 2. –
P. 77–82.
Decoration of Carbon Nanotubes with Cerium (IV) Oxide
_____________________________________________________________________________________________
ХФТП 2011. Т. 2. № 1 39
7. Liu W., Cao F., Chang L. et al. Effect of rare
earth element Ce and La on corrosion behav-
iour of AM60 magnesium alloy // Corros.
Sci. – 2009. – V. 51, N 6. – P. 1334–1343.
8. Marban G.I., Valdes-Solıs T. Preferential
oxidation of CO by CuOx/CeO2 nanocata-
lysts prepared by SACOP. Mechanisms of
deactivation under the reactant stream //
Appl. Catal. A. – 2009. – V. 361, N 1–2. –
P. 160–169.
9. Roy S., Hegde M.S., Madras G. Catalysis for
NOx abatement // Appl. Energy. – 2009. –
V. 86, N 11. – P. 2283–2297.
10. Hirata Y., Terasawa Y., Matsunaga N., Sa-
meshima S. Development of electrochemical
cell with layered composite of the Gd-doped
ceria/electronic conductor system for genera-
tion of H2–CO fuel through oxidation–
reduction of CH4–CO2 mixed gases // Ceram.
Int. – 2009. – V. 35, N 5. – P. 2023–2028.
11. Steele B.C.H. Fuel-cell technology: Running
on natural gas // Nature. – 1989. – V. 400. –
P. 619–621.
12. Di Z., Ding J., Li Y. et al. Chromium adsorp-
tion by aligned carbon nanotubes supported
ceria nanoparticles // Chemosphere. – 2006. –
V. 62, N 5. – P. 861–865.
13. Colon J., Herrera L., Smith J. et al. Protec-
tion from radiation-induced pneumonitis us-
ing cerium oxide nanoparticles // Nanomed.
Nanotechnol. Biol. Med. – 2009. – V. 5,
N 2. – P. 225–231.
14. Ghom S.A., Zamani C., Nazarpour S. et al.
Oxygen sensing with mesoporous ceria–
zirconia solid solutions // Sens. Actua-
tors. B.– 2009. – V. 140, N 1. – P. 216–221.
15. Wang L., Zhang K., Song Zh., Feng S. Ceria
concentration effect on chemical mechanical
polishing of optical glass // Appl. Surf. Sci. –
2007. – V. 253, N 11. – P. 4951–4954.
16. Armini S., De Messemaeker J., Whelan C.M,
et al. Composite polymer core–ceria shell
abrasive particles during oxide CMP: A de-
fectivity study // J. Electrochem. Soc. –
2008. – V. 155, N 9. – P. 653–660.
17. Park H.J., Kwak C., Lee K.H. et al. Interfacial
protonic conduction in ceramics // J. Eur. Ce-
ram. Soc. – 2009. – V. 29, N . – P. 2429–2437.
18. Yuan Q., Duan H., Li L. et al. Controlled syn-
thesis and assembly of ceria-based nanomate-
rials // J. Colloid Interface Sci. – 2009. –
V. 335, N 2. – P. 151–167.
19. Yanchuk I.B., Koval’s’ka E.O., Brichka A.V.,
Brichka S.Ya. Raman scattering studies of the
influence of thermal treatment of multi-
walled carbon nanotubes on their structural
characteristics // Ukr. J. Phys. – 2009. –
V. 54, N 4. – P. 407–412.
20. Weber W.H., Hass K.C., McBride J.R. Raman
study of CeO2: second-order scattering, lattice
dynamics, and particle-size effects // Phys.
Rev. B. – 1993. – V. 48, N 1. – P. 178–185.
21. Kosacki I., Suzuki T., Anderson H.U.,
Colomban Ph. Raman scattering and lattice
defects in nanocrystalline CeO2 thin films //
Solid State Ionics. – 2002. – V. 149, N 1–2. –
P. 99–105.
22. Li Y., Ding J., Chen J. et al. Preparation of
ceria nanoparticles supported on carbon
nanotubes // Mater. Res. Bull. – 2002. –
V. 37, N 2. – P. 313–318.
23. Wei J., Ding J., Wu D. et al. Coated double-
walled carbon nanotubes with ceria nanopar-
ticles // Mater. Lett. – 2005. – V. 59. –
P. 322–325.
24. Zhang D., Shi L., Fu H., Fang J. Ultrasonic-
assisted preparation of carbon nano-
tube/cerium oxide composites // Carbon. –
2006. – V. 44, N 13. – P. 2849–2867.
25. Nafradi B., Nemes N.M., Feher T. et al. Elec-
tron spin resonance of single-walled carbon
nanotubes and related structures // Phys.
Status Solidi. B. – 2006. – V. 243, N 13. –
P. 3106–3110.
26. Beuneu F., l’Huillier C., Salvetat J.P. et al.
Modification of multiwall carbon nanotubes
by electron irradiation: An ESR study // Phys.
Rev. B. – 1999. – V. 59. – P. 5945–5952.
27. Fabian J., Das Sarma S. Phonon-Induced
Spin Relaxation of Conduction Electrons in
Aluminum // Phys. Rev. Lett. – 1999. –
V. 83. – P. 1211–1214.
28. Salvetat J.P., Feher T., L’Huillier C. et al.
Electron spin resonance in alkali doped
SWCNTs // Phys. Rev. B. – 2005. – V. 72. –
P. 7544–7549.
29. Trovarelli A. Catalysis by ceria and related
materials. – London: Imperial College Press,
2002. – 528 p.
Received 21.01.2011, accepted 18.02.2011
S.Ya. Brichka, I.B. Yanchuk, A.A. Konchits et al.
_____________________________________________________________________________________________
40 ХФТП 2011. Т. 2. № 1
Декорування вуглецевих нанотрубок
оксидом церію (IV)
С.Я. Бричка, І.Б. Янчук,
А.А. Кончиць, С.П. Колесник, А.В. Єфанов,
А.В. Бричка, М.Т. Картель
Інститут хімії поверхні ім. О.О. Чуйка Національної академії наук України
вул. Генерала Наумова 17, Київ 03164, Україна
Інститут фізики напівпровідників ім. В.Є. Лашкарьова Національної академії наук України
пр. Науки 41, Київ 03028, Україна, yanchuk@isp.kiev.ua
Наночастинки оксиду церію (IV) розміром 6-10 нм одержано на вуглецевих нанотрубках (ВНТ) за хі-
мічною реакцією між Се(NО3)3 і NaOH. Встановлено ефективні параметри синтезу наночастинок
оксиду церію. Нанокомпозити ВНТ/СеО2 охарактеризовано за допомогою трансмісійної електронної
мікроскопії (ТЕМ), електронографії, КР- та ЕПР-спектроскопії. Методами електронографії і
КР-спектроскопії виявлено кубічну кристалічну структуру СеО2. ЕПР-спектроскопія показала, що
два парамагнітних сигнали мають відношення до ВНТ, а третій обумовлений парамагнітними дефе-
ктами CeO2.
Декорирование углеродных нанотрубок
оксидом церия (IV)
С.Я. Бричка, И.Б. Янчук,
А.А. Кончиц, С.П. Колесник, А.В. Ефанов,
А.В. Бричка, Н.Т. Картель
Институт химии поверхности им. А.А. Чуйко Национальной академии наук Украины
ул. Генерала Наумова 17, Киев 03164, Украина
Институт физики полупроводников им. В.Е. Лашкарева Национальной академии наук Украины
пр. Науки 41, Киев 03028, Украина, yanchuk@isp.kiev.ua
Наночастицы оксида церия (IV) размером 6-10 нм получены на углеродных нанотрубках (УНТ) в ре-
зультате химической реакции между Се(NО3)3 и NaOH. Установлены эффективные параметры син-
теза наночастиц оксида церия. Нанокомпозиты УНТ/СеО2 охарактеризованы с помощью трансмис-
сионной электронной микроскопии (ТЭМ), электронографии, КР- и ЭПР-спектроскопии. Методами
электронографии и КР-спектроскопии установлена кубическая кристаллическая структура CeO2.
ЭПР-спектроскопия показала, что два парамагнитных сигнала имеют отношение к УНТ, а третий
обусловлен парамагнитными дефектами CeO2.
|
| id | nasplib_isofts_kiev_ua-123456789-29039 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 2079-1704 |
| language | English |
| last_indexed | 2025-12-01T08:12:17Z |
| publishDate | 2011 |
| publisher | Інститут хімії поверхні ім. О.О. Чуйка НАН України |
| record_format | dspace |
| spelling | Brichka, S.Ya. Yanchuk, I.B. Konchits, A.A. Kolesnik, S.P. Yefanov, A.V. Brichka, A.V. Kartel, N.T. 2011-11-29T15:58:53Z 2011-11-29T15:58:53Z 2011 Decoration of Carbon Nanotubes with Cerium (IV) Oxide / S.Ya. Brichka, I.B. Yanchuk, A.A. Konchits, S.P. Kolesnik, A.V. Yefanov, A.V. Brichka, N.T. Kartel // Хімія, фізика та технологія поверхні. — 2011. — Т. 2, № 1. — С. 34-40. — Бібліогр.: 29 назв. — англ. 2079-1704 https://nasplib.isofts.kiev.ua/handle/123456789/29039 544.16 Cerium (IV) oxide (ceria) nanoparticles, 6–10 nm in size, supported on carbon nanotubes (CNTs) were prepared by a chemical reaction between Ce(NO3)3 and NaOH. The effective processing parameters of ceria particles size were discussed. CNTs/CeO2 hybrids were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), Raman and electron paramagnetic resonance (EPR) spectroscopy. SAED and Raman spectroscopy showed that the CeO2 particles had a cubic crystal structure. EMR spectroscopy showed two paramagnetic signals related to CNTs and a third one belonging to paramagnetic defects of CeO2. Наночастинки оксиду церію (IV) розміром 6-10 нм одержано на вуглецевих нанотрубках (ВНТ) за хімічною реакцією між Се(NО3)3 і NaOH. Встановлено ефективні параметри синтезу наночастинок оксиду церію. Нанокомпозити ВНТ/СеО2 охарактеризовано за допомогою трансмісійної електронної мікроскопії (ТЕМ), електронографії, КР- та ЕПР-спектроскопії. Методами електронографії і КР-спектроскопії виявлено кубічну кристалічну структуру СеО2. ЕПР-спектроскопія показала, що два парамагнітних сигнали мають відношення до ВНТ, а третій обумовлений парамагнітними дефектами CeO2. Наночастицы оксида церия (IV) размером 6-10 нм получены на углеродных нанотрубках (УНТ) в результате химической реакции между Се(NО3)3 и NaOH. Установлены эффективные параметры синтеза наночастиц оксида церия. Нанокомпозиты УНТ/СеО2 охарактеризованы с помощью трансмиссионной электронной микроскопии (ТЭМ), электронографии, КР- и ЭПР-спектроскопии. Методами электронографии и КР-спектроскопии установлена кубическая кристаллическая структура CeO2. ЭПР-спектроскопия показала, что два парамагнитных сигнала имеют отношение к УНТ, а третий обусловлен парамагнитными дефектами CeO2. Thanks to PPG Industries, Inc. corporation for financial support. en Інститут хімії поверхні ім. О.О. Чуйка НАН України Хімія, фізика та технологія поверхні Decoration of Carbon Nanotubes with Cerium (IV) Oxide Декорування вуглецевих нанотрубок оксидом церію (IV) Декорирование углеродных нанотрубок оксидом церия (IV) Article published earlier |
| spellingShingle | Decoration of Carbon Nanotubes with Cerium (IV) Oxide Brichka, S.Ya. Yanchuk, I.B. Konchits, A.A. Kolesnik, S.P. Yefanov, A.V. Brichka, A.V. Kartel, N.T. |
| title | Decoration of Carbon Nanotubes with Cerium (IV) Oxide |
| title_alt | Декорування вуглецевих нанотрубок оксидом церію (IV) Декорирование углеродных нанотрубок оксидом церия (IV) |
| title_full | Decoration of Carbon Nanotubes with Cerium (IV) Oxide |
| title_fullStr | Decoration of Carbon Nanotubes with Cerium (IV) Oxide |
| title_full_unstemmed | Decoration of Carbon Nanotubes with Cerium (IV) Oxide |
| title_short | Decoration of Carbon Nanotubes with Cerium (IV) Oxide |
| title_sort | decoration of carbon nanotubes with cerium (iv) oxide |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/29039 |
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