(Bi19S27I3)0.6667 nanorods with more negative potentials of conduction band as highly active photocatalysts under visible light. (9th September 2022)

• Record Type: Journal Article
• Authors: Ai, Lili; Wang, Luxiang; Guo, Nannan; Xu, Mengjiao; Jia, Dianzeng; Tan, Chuan; Jia, Xinxin; Cai, Wenwen; Yang, Yusheng
• Is Part Of: International journal of energy research. Volume 46:Number 15(2022)
• Page Start: 23857
• Page End: 23870
• Publication Date: 2022-09-09
• Subjects: (Bi19S27I3)0.6667 nanorods -- more negative ECB -- photoreduction Cr(VI) -- visible‐light response; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.8683
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: The rational design of photocatalysts with more negative potentials of the conduction band is of vital importance in improving the performance of photocatalysts for reduction reactions. In this work, highly crystalline and uniform (Bi19 S27 I3 )0.6667 nanorods were firstly synthesized by a one‐step hydrothermal process. The formation of the (Bi19 S27 I3 )0.6667 nanorods consists of nucleation and crystal growth in agglomerates of spherical particles. The obtained (Bi19 S27 I3 )0.6667 nanorods with a narrow band gap of about 1.80 eV, a wide visible light absorption spectrum, and a more negative conduction band potential are capable of producing high‐reducibility electrons, and an efficiently photogenerated carriers separation capability. The results demonstrate that the (Bi19 S27 I3 )0.6667 nanorods can be as efficient and stable photocatalysts for Cr(VI) photoreduction and RhB degradation reactions. The photocatalytic reduction efficiency of Cr(VI) over the (Bi19 S27 I3 )0.6667 nanorods was determined to be more than 3 times those of the corresponding BiOI and Bi2 S3 photocatalysts under visible light. The detailed formation mechanism of (Bi19 S27 I3 )0.6667 nanorods and the reaction mechanism of Cr(VI) photoreduction were proposed based on various characterizations. Abstract : (Bi19 S27 I3 )0.6667 nanorods with more negative potentials of conduction band can effectively photocatalytic reduction of Cr(VI) and degradation of RhB under visible light.