Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites
In this work, CeO2 nanoparticles, as well as CeO2 nanocomposites with plasmonic silver nanoparticles, were synthesized using a simple sol-gel process. The concentration of silver in the composites varied from 0.031–0.25 wt%. Cerium hydroxide dried gel was calcined at temperatures from 125 to 800 ◦C...
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2023
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ir-20.500.12258-237402025-02-11T08:16:17Z Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites Kravtsov, A. A. Кравцов, А. А. Blinov, A. V. Блинов, А. В. Nagdalian, A. A. Нагдалян, А. А. Gvozdenko, A. A. Гвозденко, А. А. Golik, A. B. Голик, А. Б. Pirogov, M. A. Пирогов, М. А. Kolodkin, M. A. Колодкин, М. А. CeO2 Photocatalytic properties Nanoparticles Nanocomposite Sol-gel Acid-base properties Ag In this work, CeO2 nanoparticles, as well as CeO2 nanocomposites with plasmonic silver nanoparticles, were synthesized using a simple sol-gel process. The concentration of silver in the composites varied from 0.031–0.25 wt%. Cerium hydroxide dried gel was calcined at temperatures from 125 to 800 ◦C to obtain CeO2. It was shown that, at an annealing temperature of 650 ◦C, single- phase CeO2 nanopowders with an average particle size in the range of 10–20 nm can be obtained. The study of acid-base properties showed that with an increase in the calcination temperature from 500 to 650 ◦C, the concentration of active centers with pKa 9.4 and 6.4 sharply increases. An analysis of the acid-base properties of CeO2-Ag nanocomposites showed that with an increase in the silver concentration, the concentration of centers with pKa 4.1 decreases, and the number of active centers with pKa 7.4 increases. In a model experiment on dye photodegradation, it was shown that the resulting CeO2 and CeO2-Ag nanopowders have photocatalytic activity. CeO2-Ag nanocomposites, regardless of the silver concentration, demonstrated better photocatalytic activity than pure nanosized CeO2. 2023-06-28T14:34:50Z 2023-06-28T14:34:50Z 2023 Статья Kravtsov, A.A., Blinov, A.V., Nagdalian, A.A., Gvozdenko, A.A., Golik, A.B., Pirogov, M.A., Kolodkin, M.A., Alharbi, N.S., Kadaikunnan, S., Thiruvengadam, M., Shariati, M.A. Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites // Micromachines. - 2023. - 14(3), 694. - DOI: 10.3390/mi14030694 http://hdl.handle.net/20.500.12258/23740 en Micromachines application/pdf application/pdf |
| institution |
СКФУ |
| collection |
Репозиторий |
| language |
English |
| topic |
CeO2 Photocatalytic properties Nanoparticles Nanocomposite Sol-gel Acid-base properties Ag |
| spellingShingle |
CeO2 Photocatalytic properties Nanoparticles Nanocomposite Sol-gel Acid-base properties Ag Kravtsov, A. A. Кравцов, А. А. Blinov, A. V. Блинов, А. В. Nagdalian, A. A. Нагдалян, А. А. Gvozdenko, A. A. Гвозденко, А. А. Golik, A. B. Голик, А. Б. Pirogov, M. A. Пирогов, М. А. Kolodkin, M. A. Колодкин, М. А. Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites |
| description |
In this work, CeO2 nanoparticles, as well as CeO2 nanocomposites with plasmonic silver nanoparticles, were synthesized using a simple sol-gel process. The concentration of silver in the composites varied from 0.031–0.25 wt%. Cerium hydroxide dried gel was calcined at temperatures from 125 to 800 ◦C to obtain CeO2. It was shown that, at an annealing temperature of 650 ◦C, single- phase CeO2 nanopowders with an average particle size in the range of 10–20 nm can be obtained. The study of acid-base properties showed that with an increase in the calcination temperature from 500 to 650 ◦C, the concentration of active centers with pKa 9.4 and 6.4 sharply increases. An analysis of the acid-base properties of CeO2-Ag nanocomposites showed that with an increase in the silver concentration, the concentration of centers with pKa 4.1 decreases, and the number of active centers with pKa 7.4 increases. In a model experiment on dye photodegradation, it was shown that the resulting CeO2 and CeO2-Ag nanopowders have photocatalytic activity. CeO2-Ag
nanocomposites, regardless of the silver concentration, demonstrated better photocatalytic activity than pure nanosized CeO2. |
| format |
Статья |
| author |
Kravtsov, A. A. Кравцов, А. А. Blinov, A. V. Блинов, А. В. Nagdalian, A. A. Нагдалян, А. А. Gvozdenko, A. A. Гвозденко, А. А. Golik, A. B. Голик, А. Б. Pirogov, M. A. Пирогов, М. А. Kolodkin, M. A. Колодкин, М. А. |
| author_facet |
Kravtsov, A. A. Кравцов, А. А. Blinov, A. V. Блинов, А. В. Nagdalian, A. A. Нагдалян, А. А. Gvozdenko, A. A. Гвозденко, А. А. Golik, A. B. Голик, А. Б. Pirogov, M. A. Пирогов, М. А. Kolodkin, M. A. Колодкин, М. А. |
| author_sort |
Kravtsov, A. A. |
| title |
Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites |
| title_short |
Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites |
| title_full |
Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites |
| title_fullStr |
Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites |
| title_full_unstemmed |
Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites |
| title_sort |
acid-base and photocatalytic properties of the ceo2-ag nanocomposites |
| publishDate |
2023 |
| url |
https://dspace.ncfu.ru/handle/20.500.12258/23740 |
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