Enhanced photocatalytic hydrogen evolution along with byproducts suppressing over Z-scheme CdxZn1-xS/Au/g-C3N4 photocatalysts under visible light
Zhao, H (Zhao, He); Ding, XL (Ding, Xiaoling); Zhang, B (Zhang, Bing); Li, YX (Li, Yingxuan); Wang, CY (Wang, Chuanyi); Li, YX
2017
Source PublicationSCIENCE BULLETIN
Volume62Issue:9Pages:602-609
AbstractInspired by natural photosynthesis, a new series of Z-scheme CdxZn1-xS/Au/g-C3N4 photocatalysts were synthesized via depositing Au particles on g-C3N4, followed by anchoring CdxZn1-xS solid solution on the pre-formed Au/g-C3N4 for photocatalytic hydrogen evolution. Their structure, morphology and optical property were investigated in detail. Photocatalytic activities of the developed photocatalysts for water splitting were evaluated under visible-light irradiation (lambda > 420 nm) using glucose as electron donor. The highest hydrogen evolution rate of 123 mu mol g(-1) h(-1) is achieved by Cd0.8Zn0.2S/Au/g-C3N4,which is 52.2 and 8.63 times higher than that of Au/g-C3N4 and CdS/Au/g-C3N4, respectively. The results of photoluminescence spectra, photoelectrochemical and time-resolved photoluminescence spectra indicate that the improved photocatalytic activities for CdxZn1-xS/Au/g-C3N4 are due to the efficient separation of photogenerated carriers. In addition, it is noteworthy that the undesired byproducts CO and CO2 are greatly reduced by introducing CdxZn1-xS over /Au/g-C3N4 surface. In the photocatalytic process, gluconic acid originated from the reaction of photogenerated hydroxyl radical with glucose plays a vital role on suppressing the formation of the gas byproducts. The present work will provide a new strategy to design Z-scheme photocatalysts with enhanced efficiency for water splitting along with suppressing the byproducts. (C) 2017 Science China Press.
KeywordHydrogen Evolution Cdxzn1-xs/au/g-c3n4 Byproducts Z-scheme Visible Light
DOI10.1016/j.scib.2017.03.005
Indexed BySCI
WOS IDWOS:000403562500003
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Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4854
Collection中国科学院特殊环境功能材料与器件重点试验室
Corresponding AuthorLi, YX
Affiliation1.Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Zhao, H ,Ding, XL ,Zhang, B ,et al. Enhanced photocatalytic hydrogen evolution along with byproducts suppressing over Z-scheme CdxZn1-xS/Au/g-C3N4 photocatalysts under visible light[J]. SCIENCE BULLETIN,2017,62(9):602-609.
APA Zhao, H ,Ding, XL ,Zhang, B ,Li, YX ,Wang, CY ,&Li, YX.(2017).Enhanced photocatalytic hydrogen evolution along with byproducts suppressing over Z-scheme CdxZn1-xS/Au/g-C3N4 photocatalysts under visible light.SCIENCE BULLETIN,62(9),602-609.
MLA Zhao, H ,et al."Enhanced photocatalytic hydrogen evolution along with byproducts suppressing over Z-scheme CdxZn1-xS/Au/g-C3N4 photocatalysts under visible light".SCIENCE BULLETIN 62.9(2017):602-609.
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