New adsorptive materials containing ≡Si(CH2)3NHC(S)NHC2H5 functional groups within surface layer
The polysiloxane xerogels and mesoporous silicas with thiourea groups ≡Si(CH2)3NHC(S)NHC2H5 were synthesized with the help of sol-gel and template methods. The influence of the synthesis method, the ratio of reacting components, (C2H5O)4Si /(C2H5O)3Si(CH2)3NHC(S)NHC2H5, and nature of functional grou...
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| Date: | 2007 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | Russian |
| Published: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2007
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| Online Access: | https://surfacezbir.com.ua/index.php/surface/article/view/212 |
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| Journal Title: | Surface |
| Download file: |  |
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Surface| Summary: | The polysiloxane xerogels and mesoporous silicas with thiourea groups ≡Si(CH2)3NHC(S)NHC2H5 were synthesized with the help of sol-gel and template methods. The influence of the synthesis method, the ratio of reacting components, (C2H5O)4Si /(C2H5O)3Si(CH2)3NHC(S)NHC2H5, and nature of functional groups on the structure-adsorption characteristics of the synthesized materials were studied. It was shown that for xerogels with increase of relative quantity TEOS in the system (from 2:1 to 8:1) the gradual increase of value of the specific surface area (from <1 to 180 m2/g) was observed. Mesoporous silicas with this functional group synthesized with 1-dodecylamine as template have more developed porous structure (Ssp = 400...925 m2/g, Vs =0,21...0,51 сm3/g, d = 2,1...5,4 nm). |
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