Strategies to Enhance ZnO Photocatalyst's Performance for Water Treatment: A Comprehensive Review. Issue 7 (4th February 2022)

• Record Type: Journal Article
• Authors: Hezam, Abdo; Drmosh, Q. A.; Ponnamma, Deepalekshmi; Bajiri, Mohammed Abdullah; Qamar, Mohammad; Namratha, K.; Zare, Mina; Nayan, M. B.; Onaizi, Sagheer A.; Byrappa, K.
• Is Part Of: Chemical record. Volume 22:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-04
• Subjects: ZnO -- Photocatalysts -- Water treatment -- Nanomaterials; Chemistry -- Periodicals; 540
• DOI: 10.1002/tcr.202100299
• Languages: English
• ISSNs: 1527-8999

Abstract

Abstract: Despite the photocatalytic organic pollutant degradation using ZnO started in 1910–1911, many challenges are still ahead, and several critical issues have to be addressed. Large band gap, and short life‐time of photogenerated electrons and holes are critical issues negatively affect the photocatalytic activity of ZnO. Various approaches have been introduced to overcome these issues including intrinsic doping, extrinsic doping, and heterostructure. This review introduces unique and deep insights into tuning of the photocatalytic activity of ZnO. It starts by description of how to tune the photocatalytic activity of pristine ZnO through tuning its morphology, surface area, exposed face, and intrinsic defects. Afterward, the review explains how the Z‐scheme approach succeed to address the redox weakened issue of heterojunction approach. In general, this review provides a clear image that helps the researcher to tune the photocatalytic activity of pristine ZnO and its heterostructure. Abstract : This review presents various strategies used to enhance ZnO photocatalyst's performance for water treatment. It summarizes the efforts made to improve the photocatalytic activity of pristine ZnO through tuning its morphology, surface area, exposed face, and intrinsic defects. The review also explains the effect of doping, defects, and how the Z‐scheme approach succeed to address the redox weakened issue of heterojunction approach.