Efficient: Z -scheme charge separation in WO3/PbWO4for the removal of organic pollutants | |
Zheng, Yi; Shao, Yiliang; Jin, Xingzhi; Shu, Min; Zhang, Longxiao; Li, Chunlei | |
刊名 | New Journal of Chemistry |
2020-11-28 | |
卷号 | 44期号:44页码:19013-19021 |
关键词 | Crystal structure Electric fields Grain boundaries Lead compounds Photocurrents Rate constants Separation Tungsten compoundsApparent rate constant Built-in electric fields Charge separations In-situ construction Photocatalytic process Photocurrent density Photodegradation rate Photogenerated carriers |
ISSN号 | 11440546 |
DOI | 10.1039/d0nj04180g |
英文摘要 | The contact quality of a composite is an important factor for the transfer and separation of photogenerated carriers. For this, we demonstrated a cation exchange method for the in situ construction of WO3/PbWO4 linked by WO6 octahedral crystal structure units, where WO3 was placed on the surface of PbWO4. We found that the apparent rate constant of the as-prepared WO3/PbWO4 was significantly increased (17 times higher than any single one). Our investigation indicated a remarkably enhanced photodegradation rate, originating from high contact quality. The photogenerated carriers of WO3/PbWO4 were greatly separated via the grain boundary, making WO3/PbWO4 exhibit 22 times higher photocurrent density than pristine PbWO4. Moreover, the photoelectrons and holes were separated through the high contact quality grain boundary built-in electric field, which is in accordance with the transmission path of the Z-scheme. Compared with the interface, a grain boundary is more conducive to the photocatalytic process. This study provides a feasible strategy to build a highly efficient Z-scheme photocatalyst with high contact quality grain boundary to remove organic pollutants. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. |
WOS研究方向 | Chemistry |
语种 | 英语 |
出版者 | Royal Society of Chemistry |
WOS记录号 | WOS:000589891400005 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/132346] |
专题 | 石油化工学院 |
作者单位 | School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China |
推荐引用方式 GB/T 7714 | Zheng, Yi,Shao, Yiliang,Jin, Xingzhi,et al. Efficient: Z -scheme charge separation in WO3/PbWO4for the removal of organic pollutants[J]. New Journal of Chemistry,2020,44(44):19013-19021. |
APA | Zheng, Yi,Shao, Yiliang,Jin, Xingzhi,Shu, Min,Zhang, Longxiao,&Li, Chunlei.(2020).Efficient: Z -scheme charge separation in WO3/PbWO4for the removal of organic pollutants.New Journal of Chemistry,44(44),19013-19021. |
MLA | Zheng, Yi,et al."Efficient: Z -scheme charge separation in WO3/PbWO4for the removal of organic pollutants".New Journal of Chemistry 44.44(2020):19013-19021. |
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