Direct z-scheme cs2o-bi2o3-zno heterostructures as efficient sunlight-driven photocatalysts

Hezam, A. and Namratha, K. and Ponnamma, D. and Drmosh, Q. A. and Saeed, A. M. N. and Cheng, C. and Byrappa, K. (2018) Direct z-scheme cs2o-bi2o3-zno heterostructures as efficient sunlight-driven photocatalysts. ACS Omega, 3 (9). pp. 12260-12269.

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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. Copyright © 2018 American Chemical Society.

Item Type: Article
Subjects: D Physical Science > Material Science
Divisions: Department of > Material Science
Depositing User: Manjula P Library Assistant
Date Deposited: 08 Jan 2021 07:40
Last Modified: 08 Jan 2021 07:40

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