ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ
Cobalt and manganese oxides and their complex oxide compositions were obtained by the sol-gel method using various precipitators(ammonia solution and HMTA). It was determined by X-ray diffraction method that both individual and co-precipitated hydroxo compounds after calcination at 400 °С form oxide...
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| Date: | 2020 |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2020
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-2162020-09-28T12:34:38Z INFLUENCE OF CONDITIONS OF SYNTHESIS OF COBALT AND MANGANESE OXIDES ON THEIR ABILITY TO CATALYTIC DECOMPOSITION OF HYDROGEN PEROXIDE ВЛИЯНИЕ УСЛОВИЙ СИНТЕЗА ОКСИДОВ КОБАЛЬТА И МАРГАНЦА НА ИХ СПОСОБНОСТЬ К КАТАЛИТИЧЕСКОМУ РАЗЛОЖЕНИЮ ПЕРОКСИДА ВОДОРОДА ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ Ivanenko, Olexandr Omel’chuk, Anatoliy Pavlenko, Tamara Pohorenko, Yuliia Bikov, Valerii sol-gel synthesis, cobalt and manganese oxides, hydrogen peroxide, catalytic decomposition. Cobalt and manganese oxides and their complex oxide compositions were obtained by the sol-gel method using various precipitators(ammonia solution and HMTA). It was determined by X-ray diffraction method that both individual and co-precipitated hydroxo compounds after calcination at 400 °С form oxide phases of Co3O4 and Mn3O4 composition. Samples obtained by sedimentation with ammonia solution have a larger specific surface area than synthesized in HMTA solution. When calcined at 400 °C, the specific surface area for cobalt-containing samples sedimentated with ammonia solution decreases, and for samples sedimentated from HMTA solution - increases. The pore volume depends on the precipitator and changes little during calcination. For co-sedimentated and calcined at 400 °C samples, the specific surface area plays a significant role: the higher it is, the greater the catalytic ability of the sample to decompose hydrogen peroxide. On the SEM image of samples driedat 100 °C, sedimentated with ammonia solution, agglomeration of flat particles of gitrated oxides of cobalt and/or manganese of globular form is observed. For samples deposited in HMTA solution, SEM images are represented by agglomeration of particles in the form of planar layers. Calcination at 400 °C partially destroys the structure. Kinetic studies of the decomposition of hydrogen peroxide with theparticipation of the obtained samples indicate the first order of the reaction. Samples of cobalt hydroxide and co-sedimentated cobalt and manganese hydroxy compounds synthesized in HMTA solution showed the best ability to catalyze. The highest productivity (dm3 H2O2 of decomposed 1 g of catalyst) is inherent in samples of cobalt hydroxy compounds and its composition with manganese compounds synthesized by HMTA, after heat treatment at 100 °C. The ability of such samples to catalytic decomposition of hydrogen peroxide is estimated to be not less than 2.4 dm3 H2O2 (14 days). Compared to compounds synthesizedwith ammonia solution, they retain their activity for a longer time. V.I.Vernadsky Institute of General and Inorganic Chemistry 2020-09-15 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/216 10.33609/2708-129X.86.8.2020.111-125 Ukrainian Chemistry Journal; Vol. 86 No. 8 (2020): Ukrainian Chemistry Journal; 111-125 Украинский химический журнал; Том 86 № 8 (2020): Украинский химический журнал; 111-125 Український хімічний журнал; Том 86 № 8 (2020): Український хімічний журнал; 111-125 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/216/121 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2020-09-28T12:34:38Z |
| collection |
OJS |
| language |
English |
| topic_facet |
sol-gel synthesis cobalt and manganese oxides hydrogen peroxide catalytic decomposition. |
| format |
Article |
| author |
Ivanenko, Olexandr Omel’chuk, Anatoliy Pavlenko, Tamara Pohorenko, Yuliia Bikov, Valerii |
| spellingShingle |
Ivanenko, Olexandr Omel’chuk, Anatoliy Pavlenko, Tamara Pohorenko, Yuliia Bikov, Valerii ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ |
| author_facet |
Ivanenko, Olexandr Omel’chuk, Anatoliy Pavlenko, Tamara Pohorenko, Yuliia Bikov, Valerii |
| author_sort |
Ivanenko, Olexandr |
| title |
ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ |
| title_short |
ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ |
| title_full |
ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ |
| title_fullStr |
ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ |
| title_full_unstemmed |
ВПЛИВ УМОВ СИНТЕЗУ ОКСИДІВ КОБАЛЬТУ ТА МАНГАНУ НА ЇХНЮ ЗДАТНІСТЬ ДО КАТАЛІТИЧНОГО РОЗКЛАДУ ПЕРОКСИДУ ВОДНЮ |
| title_sort |
вплив умов синтезу оксидів кобальту та мангану на їхню здатність до каталітичного розкладу пероксиду водню |
| title_alt |
INFLUENCE OF CONDITIONS OF SYNTHESIS OF COBALT AND MANGANESE OXIDES ON THEIR ABILITY TO CATALYTIC DECOMPOSITION OF HYDROGEN PEROXIDE ВЛИЯНИЕ УСЛОВИЙ СИНТЕЗА ОКСИДОВ КОБАЛЬТА И МАРГАНЦА НА ИХ СПОСОБНОСТЬ К КАТАЛИТИЧЕСКОМУ РАЗЛОЖЕНИЮ ПЕРОКСИДА ВОДОРОДА |
| description |
Cobalt and manganese oxides and their complex oxide compositions were obtained by the sol-gel method using various precipitators(ammonia solution and HMTA). It was determined by X-ray diffraction method that both individual and co-precipitated hydroxo compounds after calcination at 400 °С form oxide phases of Co3O4 and Mn3O4 composition. Samples obtained by sedimentation with ammonia solution have a larger specific surface area than synthesized in HMTA solution. When calcined at 400 °C, the specific surface area for cobalt-containing samples sedimentated with ammonia solution decreases, and for samples sedimentated from HMTA solution - increases. The pore volume depends on the precipitator and changes little during calcination. For co-sedimentated and calcined at 400 °C samples, the specific surface area plays a significant role: the higher it is, the greater the catalytic ability of the sample to decompose hydrogen peroxide. On the SEM image of samples driedat 100 °C, sedimentated with ammonia solution, agglomeration of flat particles of gitrated oxides of cobalt and/or manganese of globular form is observed. For samples deposited in HMTA solution, SEM images are represented by agglomeration of particles in the form of planar layers. Calcination at 400 °C partially destroys the structure. Kinetic studies of the decomposition of hydrogen peroxide with theparticipation of the obtained samples indicate the first order of the reaction. Samples of cobalt hydroxide and co-sedimentated cobalt and manganese hydroxy compounds synthesized in HMTA solution showed the best ability to catalyze. The highest productivity (dm3 H2O2 of decomposed 1 g of catalyst) is inherent in samples of cobalt hydroxy compounds and its composition with manganese compounds synthesized by HMTA, after heat treatment at 100 °C. The ability of such samples to catalytic decomposition of hydrogen peroxide is estimated to be not less than 2.4 dm3 H2O2 (14 days). Compared to compounds synthesizedwith ammonia solution, they retain their activity for a longer time. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2020 |
| url |
https://ucj.org.ua/index.php/journal/article/view/216 |
| work_keys_str_mv |
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2025-09-24T17:43:34Z |
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2025-09-24T17:43:34Z |
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