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Recent progress on elemental sulfur based photocatalysts for energy and environmental applications

Authors
Kumar, YogeshKumar, RohitRaizada, PankajKhan, Aftab Aslam ParwazNguyen, Van-HuyKim, Soo YoungVan Le, QuyetSelvasembian, RangabhashiyamSingh, ArchanaGautam, SouravNguyen, Chinh ChienSingh, Pardeep
Issue Date
10월-2022
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Elemental sulfur; Photocatalysis; Heterojunction formation; Surface modification; S-Doping; Photocatalytic applications
Citation
CHEMOSPHERE, v.305
Indexed
SCIE
SCOPUS
Journal Title
CHEMOSPHERE
Volume
305
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/142716
DOI
10.1016/j.chemosphere.2022.135477
ISSN
0045-6535
Abstract
The growing needs of the rising population and blatant misuse of resources have contributed enormously to environmental problems. Among the various methods, photocatalysis has emerged as one of the effective remediation methods. The continuous search for effective photocatalysts that can be made from abundant, cheap, non-toxic materials is going on. Although sulfur is a known insulator, recent sulfur use as a visible light photocatalyst has ushered a new era in this direction. Sulfur is a non-toxic, cheap, and abundant photocatalyst, exhibiting significant photocatalytic properties. But, hydrophobicity, poor light-harvesting and high recombination rate of charge carriers in elemental sulfur photocatalyst are some of the major drawbacks of the elemental sulfur photocatalyst. The photocatalytic activity of sulfur as a single element was low, but various methods such as nanoscaling, heterojunction formation, doping and surface modifications have been used to enhance it. The review highlights sulfur's crystal structure, electronic and optical properties, and morphological changes, making it an excellent visible light photocatalyst. The article points to the limitations of sulfur as a single photocatalyst and various strategies to improve the shortcomings. More recently, there has been an emphasis on the synthesis of metal-free photocatalysts. This review provides its readers with a comprehensive detail of sulfur being used as a dopant in improving the photocatalytic properties of metal-free photocatalysts and their environmental remediation use. Finally, the conclusion and future perspectives for sulfur-based nanostructures are presented.
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