Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution
The photodegradation of organic pollutants and photocatalytic hydrogen generation from water by semiconductor catalysts are regarded as the of the most promising strategies to resolve the crisis of global environmental issues. Herein, we successfully designed and prepared a series of silver-decorate...
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MDPI AG
2021-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/5/1104 |
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| author | Jinwen Liu Li Zhang Yifei Sun Yang Luo |
| author_facet | Jinwen Liu Li Zhang Yifei Sun Yang Luo |
| author_sort | Jinwen Liu |
| collection | DOAJ |
| description | The photodegradation of organic pollutants and photocatalytic hydrogen generation from water by semiconductor catalysts are regarded as the of the most promising strategies to resolve the crisis of global environmental issues. Herein, we successfully designed and prepared a series of silver-decorated CeO<sub>2</sub>(Ag/CeO<sub>2</sub>) photocatalysts with different morphologies by a facile hydrothermal route. The physical properties, charge transfer behavior and photocatalytic performances (degradation and hydrogen evolution) over diverse catalysts with nanocubes, nanoparticles and nanorods shapes were comprehensively studied. It was found that the Ag-decorated CeO<sub>2</sub> nanorods (Ag/R-CeO<sub>2</sub>) demonstrate the best activity for both photocatalytic methyl orange (MO) degradation and photocatalytic H<sub>2</sub> production reaction with attractive stability during cycling tests, suggesting its desirable practical potential. The superior performance of Ag/R-CeO<sub>2</sub> can be ascribed to (1) the facilitated light absorption due to enriched surface oxygen vacancies (OVs) and plasmonic Ag nanoparticles on nanorods, (2) the facilitated photo-excited charge carrier (e<sup>−</sup>-h<sup>+</sup>) separation efficiency on a metal/oxide hybrid structure and (3) the promoted formation of active reaction intermediates on surface-enriched Ag and oxygen vacancies reactive sites on Ag/CeO<sub>2</sub> nanorods. This study provides a valuable discovery of the utilization of abundant solar energy for diverse catalytic processes. |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T12:00:21Z |
| publishDate | 2021-04-01 |
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| spelling | doaj.art-e48d435d37794a8786f44dc9b1ce1d6f2023-11-21T17:01:30ZengMDPI AGNanomaterials2079-49912021-04-01115110410.3390/nano11051104Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen EvolutionJinwen Liu0Li Zhang1Yifei Sun2Yang Luo3Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, ChinaSchool of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 823808, ChinaCollege of Energy, Xiamen University, Xiamen 361005, ChinaThird Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, ChinaThe photodegradation of organic pollutants and photocatalytic hydrogen generation from water by semiconductor catalysts are regarded as the of the most promising strategies to resolve the crisis of global environmental issues. Herein, we successfully designed and prepared a series of silver-decorated CeO<sub>2</sub>(Ag/CeO<sub>2</sub>) photocatalysts with different morphologies by a facile hydrothermal route. The physical properties, charge transfer behavior and photocatalytic performances (degradation and hydrogen evolution) over diverse catalysts with nanocubes, nanoparticles and nanorods shapes were comprehensively studied. It was found that the Ag-decorated CeO<sub>2</sub> nanorods (Ag/R-CeO<sub>2</sub>) demonstrate the best activity for both photocatalytic methyl orange (MO) degradation and photocatalytic H<sub>2</sub> production reaction with attractive stability during cycling tests, suggesting its desirable practical potential. The superior performance of Ag/R-CeO<sub>2</sub> can be ascribed to (1) the facilitated light absorption due to enriched surface oxygen vacancies (OVs) and plasmonic Ag nanoparticles on nanorods, (2) the facilitated photo-excited charge carrier (e<sup>−</sup>-h<sup>+</sup>) separation efficiency on a metal/oxide hybrid structure and (3) the promoted formation of active reaction intermediates on surface-enriched Ag and oxygen vacancies reactive sites on Ag/CeO<sub>2</sub> nanorods. This study provides a valuable discovery of the utilization of abundant solar energy for diverse catalytic processes.https://www.mdpi.com/2079-4991/11/5/1104photocatalytic degradationphotocatalytic hydrogen evolutioncatalystAg/CeO<sub>2</sub>oxygen vacancy |
| spellingShingle | Jinwen Liu Li Zhang Yifei Sun Yang Luo Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution Nanomaterials photocatalytic degradation photocatalytic hydrogen evolution catalyst Ag/CeO<sub>2</sub> oxygen vacancy |
| title | Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution |
| title_full | Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution |
| title_fullStr | Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution |
| title_full_unstemmed | Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution |
| title_short | Bifunctional Ag-Decorated CeO<sub>2</sub> Nanorods Catalysts for Promoted Photodegradation of Methyl Orange and Photocatalytic Hydrogen Evolution |
| title_sort | bifunctional ag decorated ceo sub 2 sub nanorods catalysts for promoted photodegradation of methyl orange and photocatalytic hydrogen evolution |
| topic | photocatalytic degradation photocatalytic hydrogen evolution catalyst Ag/CeO<sub>2</sub> oxygen vacancy |
| url | https://www.mdpi.com/2079-4991/11/5/1104 |
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