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In situ topotactic fabrication of direct Z-scheme 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet heterojunction for efficient photocatalytic water splitting
Shi, Jingjing1; Li, Shuangde2; Wang, Fengming1; Li, Yanmei1; Gao, Lina1; Zhang, Xiaorang1; Lu, Jun1
2018-12-21
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume8Issue:24Pages:6458-6467
Abstract

Direct Z-scheme heterojunction can effectively enhance the photocatalytic activity due to its low carrier recombination rate and high redox ability. In this study, a 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet heterojunction is synthesized in situ by topotactic sulfurization/oxidization pyrolysis of Zn/Cd/Al layer double hydroxides (LDHs). Its unique structure provides not only numerous intimate interfaces but also a direct Z-scheme junction. The in situ topotactic fabrication of ZnO by the oxidation process causes some Zn ions to dissolve out from the Zn(0.67)Cd(0.3)3S solid solution nanosheets with increase in annealing temperature and time. The longer the time for oxidation, the more ZnO is obtained. The formation of ZnO yields 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet heterojunction, which increases the visible light absorption and boosts the separation of photogenerated carriers. The ZnO/ZnxCd1-xS-4 single crystal nanosheet heterojunction presents the highest photocatalytic activity under visible light irradiation (38.93 mmol h(-1) g(-1)), which is nearly 16.93 times higher than that of Zn0.67Cd0.33S-300, and an external quantum efficiency of 40.97% at = 420 nm. The proposed synthetic route for the construction of 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet provides a direct Z-scheme structure with highly efficient photocatalytic hydrogen evolution activity.

DOI10.1039/c8cy01884g
Language英语
WOS KeywordHighly Efficient ; Environmental Remediation ; Charge Separation ; H-2 Evolution ; Quantum Dots ; Cds ; Performance ; Tio2 ; Wo3 ; Nanocomposites
Funding Project973 Program[2014CB932101] ; National Natural Science Foundation of China ; 111 Project[B07004] ; Program for Changjiang Scholars and Innovative Research Team in University[IRT1205] ; Fundamental Research Funds for the Central Universities[buctrc201527] ; Open Research Fund of State Key Laboratory of Multi-phase Complex Systems[MPCS-2017-D-06]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding Organization973 Program ; National Natural Science Foundation of China ; 111 Project ; Program for Changjiang Scholars and Innovative Research Team in University ; Fundamental Research Funds for the Central Universities ; Open Research Fund of State Key Laboratory of Multi-phase Complex Systems
WOS IDWOS:000453549100014
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/27569
Collection中国科学院过程工程研究所
Corresponding AuthorLu, Jun
Affiliation1.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, P Box 98,15 Beisanhuan East Rd, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Shi, Jingjing,Li, Shuangde,Wang, Fengming,et al. In situ topotactic fabrication of direct Z-scheme 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet heterojunction for efficient photocatalytic water splitting[J]. CATALYSIS SCIENCE & TECHNOLOGY,2018,8(24):6458-6467.
APA Shi, Jingjing.,Li, Shuangde.,Wang, Fengming.,Li, Yanmei.,Gao, Lina.,...&Lu, Jun.(2018).In situ topotactic fabrication of direct Z-scheme 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet heterojunction for efficient photocatalytic water splitting.CATALYSIS SCIENCE & TECHNOLOGY,8(24),6458-6467.
MLA Shi, Jingjing,et al."In situ topotactic fabrication of direct Z-scheme 2D/2D ZnO/ZnxCd1-xS single crystal nanosheet heterojunction for efficient photocatalytic water splitting".CATALYSIS SCIENCE & TECHNOLOGY 8.24(2018):6458-6467.
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