Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution
Photocatalytic water splitting is one of the promising approaches to solving environmental problems and energy crises. However, the sluggish 4e<sup>−</sup> transfer kinetics in water oxidation half-reaction restricts the 2e<sup>−</sup> reduction efficiency in photocatalytic w...
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MDPI AG
2022-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/11/1931 |
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| author | Shaohong Zang Xiaorong Cai Mengshan Chen Dehong Teng Fei Jing Zhe Leng Yingtang Zhou Feng Lin |
| author_facet | Shaohong Zang Xiaorong Cai Mengshan Chen Dehong Teng Fei Jing Zhe Leng Yingtang Zhou Feng Lin |
| author_sort | Shaohong Zang |
| collection | DOAJ |
| description | Photocatalytic water splitting is one of the promising approaches to solving environmental problems and energy crises. However, the sluggish 4e<sup>−</sup> transfer kinetics in water oxidation half-reaction restricts the 2e<sup>−</sup> reduction efficiency in photocatalytic water splitting. Herein, cobalt vanadate-decorated polymeric carbon nitride (named CoVO/PCN) was constructed to mediate the carrier kinetic process in a photocatalytic water oxidation reaction (WOR). The photocatalysts were well-characterized by various physicochemical techniques such as XRD, FT-IR, TEM, and XPS. Under UV and visible light irradiation, the O<sub>2</sub> evolution rate of optimized 3 <i>wt</i>% CoVO/PCN reached 467 and 200 μmol h<sup>−1</sup> g<sup>−1</sup>, which were about 6.5 and 5.9 times higher than that of PCN, respectively. Electrochemical tests and PL results reveal that the recombination of photogenerated carriers on PCN is effectively suppressed and the kinetics of WOR is significantly enhanced after CoVO introduction. This work highlights key features of the tuning carrier kinetics of PCN using charge-conducting materials, which should be the basis for the further development of photocatalytic O<sub>2</sub> reactions. |
| first_indexed | 2024-03-10T01:01:46Z |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T01:01:46Z |
| publishDate | 2022-06-01 |
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| spelling | doaj.art-a0eb1a0dbab443ceb9b29f276ebfad552023-11-23T14:34:33ZengMDPI AGNanomaterials2079-49912022-06-011211193110.3390/nano12111931Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> EvolutionShaohong Zang0Xiaorong Cai1Mengshan Chen2Dehong Teng3Fei Jing4Zhe Leng5Yingtang Zhou6Feng Lin7Institute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaInstitute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaInstitute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaInstitute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaInstitute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaInstitute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaInstitute of Innovation & Application, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, ChinaCollege of Chemical and Materials Engineering, Quzhou University, Quzhou 324000, ChinaPhotocatalytic water splitting is one of the promising approaches to solving environmental problems and energy crises. However, the sluggish 4e<sup>−</sup> transfer kinetics in water oxidation half-reaction restricts the 2e<sup>−</sup> reduction efficiency in photocatalytic water splitting. Herein, cobalt vanadate-decorated polymeric carbon nitride (named CoVO/PCN) was constructed to mediate the carrier kinetic process in a photocatalytic water oxidation reaction (WOR). The photocatalysts were well-characterized by various physicochemical techniques such as XRD, FT-IR, TEM, and XPS. Under UV and visible light irradiation, the O<sub>2</sub> evolution rate of optimized 3 <i>wt</i>% CoVO/PCN reached 467 and 200 μmol h<sup>−1</sup> g<sup>−1</sup>, which were about 6.5 and 5.9 times higher than that of PCN, respectively. Electrochemical tests and PL results reveal that the recombination of photogenerated carriers on PCN is effectively suppressed and the kinetics of WOR is significantly enhanced after CoVO introduction. This work highlights key features of the tuning carrier kinetics of PCN using charge-conducting materials, which should be the basis for the further development of photocatalytic O<sub>2</sub> reactions.https://www.mdpi.com/2079-4991/12/11/1931photocatalysiswater oxidationcobalt vanadatespolymeric carbon nitride |
| spellingShingle | Shaohong Zang Xiaorong Cai Mengshan Chen Dehong Teng Fei Jing Zhe Leng Yingtang Zhou Feng Lin Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution Nanomaterials photocatalysis water oxidation cobalt vanadates polymeric carbon nitride |
| title | Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution |
| title_full | Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution |
| title_fullStr | Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution |
| title_full_unstemmed | Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution |
| title_short | Tunable Carrier Transfer of Polymeric Carbon Nitride with Charge-Conducting CoV<sub>2</sub>O<sub>6</sub>∙2H<sub>2</sub>O for Photocatalytic O<sub>2</sub> Evolution |
| title_sort | tunable carrier transfer of polymeric carbon nitride with charge conducting cov sub 2 sub o sub 6 sub ∙2h sub 2 sub o for photocatalytic o sub 2 sub evolution |
| topic | photocatalysis water oxidation cobalt vanadates polymeric carbon nitride |
| url | https://www.mdpi.com/2079-4991/12/11/1931 |
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