Rational construction of oxygen vacancies onto tungsten trioxide to improve visible light photocatalytic water oxidation reaction
文献类型：期刊论文
| 作者 | Wang, YT; Cai, JM; Wu, MQ; Chen, JH; Zhao, WY; Tian, Y; Ding, T; Zhang, J; Jiang, Z; Li, XG |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2018 |
| 卷号 | 239期号:-页码:398-407 |
| 关键词 | SURFACE-PLASMON RESONANCES HYDROGEN-PRODUCTION WO3 NANOFLAKES SOLAR-ENERGY TREATED WO3 BLACK TIO2 PERFORMANCE EVOLUTION NANOPARTICLES CONVERSION |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2018.08.029 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Defect engineering is a promising strategy to enhance light absorption and charge separation of photocatalysts. Herein, we simply tailor the quantity and distribution of oxygen vacancies, as one of typical defects, on surface or bulk of thermal-treated WO3 in the different H-2 concentration. The quantity of bulk oxygen vacancies on WO3 consistently rises with the increased H-2 concentration, while that of surface oxygen vacancies presents a volcano type variation. The sample of WO3-H20, thermal-pretreated in 20% H-2, contains the largest amount of surface oxygen vacancies. Our results show that both surface and bulk oxygen vacancies on WO3 can promote the visible light photocatalytic activity in water splitting, however, in different ways. Bulk oxygen vacancies mainly promote the visible light harvesting and slightly restrain the electrons and holes recombination by narrowing band gap energy (E-g), while surface oxygen vacancies significantly increase the charge-carriers separation efficiency by lowering valence band edge (VBE). Compared with the light absorption, the separation of electrons and holes is more critical in photocatalytic oxygen evolution over WO3, revealing the more decisive role of surface oxygen vacancies than bulk oxygen vacancies. Expectedly, WO3-H20 shows the highest charge-carriers separation efficiency and visible light photocatalytic performance. Our work provides a new insight into designing of efficient defect-engineered semiconductors for the related solar light utilization processes. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31083]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China 2.Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin Key Lab Appl Catalysis Sci & Engn, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, YT,Cai, JM,Wu, MQ,et al. Rational construction of oxygen vacancies onto tungsten trioxide to improve visible light photocatalytic water oxidation reaction[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,239(-):398-407. |
| APA | Wang, YT.,Cai, JM.,Wu, MQ.,Chen, JH.,Zhao, WY.,...&Li, XG.(2018).Rational construction of oxygen vacancies onto tungsten trioxide to improve visible light photocatalytic water oxidation reaction.APPLIED CATALYSIS B-ENVIRONMENTAL,239(-),398-407. |
| MLA | Wang, YT,et al."Rational construction of oxygen vacancies onto tungsten trioxide to improve visible light photocatalytic water oxidation reaction".APPLIED CATALYSIS B-ENVIRONMENTAL 239.-(2018):398-407. |
入库方式： OAI收割
来源：上海应用物理研究所
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