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Enhanced performance of direct Z-scheme CuS-WO3 system towards photocatalytic decomposition of organic pollutants under visible light
Song, Chundong1; Wang, Xiang2; Zhang, Jing1; Chen, Xuebing1; Li, Can3
KeywordCus Wo3 Direct Z-scheme Photocatalytic System Rhodamine b
Source PublicationAPPLIED SURFACE SCIENCE
2017-12-15
DOI10.1016/j.apsusc.2017.07.082
Volume425Pages:788-795
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS Research AreaChemistry ; Materials Science ; Physics
WOS KeywordHETEROJUNCTION PHOTOCATALYSTS ; CHARGE-TRANSFER ; TIO2 ; DEGRADATION ; TEMPERATURE ; REDUCTION ; GRAPHENE ; JUNCTION ; DYES ; FILM
AbstractCuS-WO3 composites were synthesized by an in situ solution method at low temperature. The crystalline phase, morphology, particle size, and the optical properties of CuS-WO3 samples were characterized by XRD, SEM, XPS, and UV-vis diffuse reflectance spectra. CuS-WO3 composites showed much higher activity for photocatalytic degradation of RhB as compared with WO3 and CuS. The degradation rate constant over 1 wt% CuS-WO3 catalyst was 4.4 times and 9.2 times higher than that of WO3 and CuS, respectively. It is found that holes (h(+)) and superoxide radical anions (. O-2(-)) are the dominant reactive species by using methanol, disodium ethylenediaminetetraacetate (EDTA) and ascorbic acid as scavengers. Band structure analysis shows that bottom of CB of WO3 is very similar with and higher (ca. 0.01 eV) than the top of VB of CuS. The results of PL showed that the similarity renders the recombination between photogenerated holes on the VB of CuS and photogenerated electrons on the CB of WO3 possible and easy, forming a direct Z-scheme in CuS-WO3. This result in that more electrons in the CB of CuS and holes in the VB of WO3 survived, and then participated in the photocatalytic degradation of RhB, showing an increased activity. (c) 2017 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000410609400097
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/149923
Collection中国科学院大连化学物理研究所
Affiliation1.Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Fushun 113001, Liaoning, Peoples R China
2.Pacific Northwest Natl Lab, Inst Integrated Catalysis, Richland, WA 99352 USA
3.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Song, Chundong,Wang, Xiang,Zhang, Jing,et al. Enhanced performance of direct Z-scheme CuS-WO3 system towards photocatalytic decomposition of organic pollutants under visible light[J]. APPLIED SURFACE SCIENCE,2017,425:788-795.
APA Song, Chundong,Wang, Xiang,Zhang, Jing,Chen, Xuebing,&Li, Can.(2017).Enhanced performance of direct Z-scheme CuS-WO3 system towards photocatalytic decomposition of organic pollutants under visible light.APPLIED SURFACE SCIENCE,425,788-795.
MLA Song, Chundong,et al."Enhanced performance of direct Z-scheme CuS-WO3 system towards photocatalytic decomposition of organic pollutants under visible light".APPLIED SURFACE SCIENCE 425(2017):788-795.
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