Direct -Scheme CsO-BiO-ZnO Heterostructures As Efficient Sunlight-Driven Photocatalysts

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2019 Aug 29

PMID 31459301

Citations 6

Authors

Abdo Hezam

K Namratha

Deepalekshmi Ponnamma

Q A Drmosh

Adel Morshed Nagi Saeed

Chun Cheng

K Byrappa

Affiliations

Soon will be listed here.

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 -scheme CsO-BiO-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 CsO in extending light absorption to visible and near-infrared regions but also its involvement in charge carrier separation. Radical-trapping experiments verify the direct -scheme approach followed by the charge carriers in heterostructured CsO-BiO-ZnO photocatalysts. The -scheme charge carrier pathway induced by the presence of CsO has emerged as the reason behind the efficient charge carrier separation and high photocatalytic activity.

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