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; Jiang, Z; Li, XG; Zhang J(张静) ; Zhang, J; Ding, T; Tian, Y; Zhao, WY; Chen, JH; Wu, MQ
|
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2018 |
| 卷号 | 239页码:398-407 |
| 关键词 | Oxygen vacancy Defect engineering Tungsten trioxide Visible light photocatalysis Charge-carriers separation |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2018.08.029 |
| 文献子类 | Article |
| 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. |
| 电子版国际标准刊号 | 1873-3883 |
| WOS关键词 | SURFACE-PLASMON RESONANCES ; HYDROGEN-PRODUCTION ; WO3 NANOFLAKES ; SOLAR-ENERGY ; TREATED WO3 ; BLACK TIO2 ; PERFORMANCE ; EVOLUTION ; NANOPARTICLES ; CONVERSION |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000446283800042 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286381]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_加速器中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, YT,Jiang, Z,Li, XG,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.,Jiang, Z.,Li, XG.,张静.,Zhang, J.,...&Cai, JM.(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：高能物理研究所
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