Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts
Author | Hezam A. |
Author | Namratha K. |
Author | Ponnamma D. |
Author | Drmosh Q.A. |
Author | Saeed A.M.N. |
Author | Cheng C. |
Author | Byrappa K. |
Available date | 2020-03-03T06:19:04Z |
Publication Date | 2018 |
Publication Name | ACS Omega |
Resource | Scopus |
ISSN | 24701343 |
Abstract | Limited 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. |
Sponsor | Qatar 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 |
Language | en |
Publisher | American Chemical Society |
Subject | high-efficiency photocatalytic water treatment |
Type | Article |
Pagination | 12260 - 12269 |
Issue Number | 9 |
Volume Number | 3 |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
Center for Advanced Materials Research [1349 items ]