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AuthorHezam A.
AuthorNamratha K.
AuthorPonnamma D.
AuthorDrmosh Q.A.
AuthorSaeed A.M.N.
AuthorCheng C.
AuthorByrappa K.
Available date2020-03-03T06:19:04Z
Publication Date2018
Publication NameACS Omega
ResourceScopus
ISSN24701343
URIhttp://dx.doi.org/10.1021/acsomega.8b01449
URIhttp://hdl.handle.net/10576/13125
AbstractLimited light absorption, inefficient electron-hole separation, and unsuitable positions of conduction band bottom and/or valence band top are three major critical issues associated with high-efficiency photocatalytic water treatment. An attempt has been carried out here to address these issues through the synthesis of direct Z-scheme Cs2O-Bi2O3-ZnO heterostructures via a facile, fast, and economic method: solution combustions synthesis. The photocatalytic performances are examined by the 4-chlorophenol degradation test under simulated sunlight irradiation. UV-vis diffuse reflectance spectroscopy analysis, electrochemical impedance test, and the observed transient photocurrent responses prove not only the significant role of Cs2O in extending light absorption to visible and near-infrared regions but also its involvement in charge carrier separation. Radical-trapping experiments verify the direct Z-scheme approach followed by the charge carriers in heterostructured Cs2O-Bi2O3-ZnO photocatalysts. The Z-scheme charge carrier pathway induced by the presence of Cs2O has emerged as the reason behind the efficient charge carrier separation and high photocatalytic activity.
SponsorQatar University, Shenzhen Polytechnic, Southern University of Science and Technology, King Fahd University of Petroleum and Minerals, Excellent Young Talents Fund Program of Higher Education Institutions of Anhui Province, Ministry of Science and Technology of the People's Republic of China, National Natural Science Foundation of China
Languageen
PublisherAmerican Chemical Society
Subjecthigh-efficiency photocatalytic
water treatment
TitleDirect Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts
TypeArticle
Pagination12260 - 12269
Issue Number9
Volume Number3


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