Green immobilization of CdS-Pt nanoparticles on recombinant Escherichia coli boosted by overexpressing cysteine desulfurase for photocatalysis application

被引：3

作者：

Liu Y. ^{[1
]}

Pei R. ^{[1
]}

Huang Z. ^{[1
]}

Xiao J. ^{[1
]}

Yao A. ^{[1
]}

Xu K. ^{[1
]}

Li Y. ^{[2
]}

Ullah S. ^{[2
]}

Yu Z. ^{[1
]}

Wang Y. ^{[2
]}

Zhou S.-F. ^{[1
]}

Zhan G. ^{[1
]}

机构：

[1] College of Chemical Engineering, Integrated Nanocatalysts Institute (INCI), Huaqiao University, 668 Jimei Avenue Fujian, Xiamen

[2] Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, 422 Siming South Road Fujian, Xiamen

来源：

Bioresource Technology Reports | 2021年 / 16卷

基金：

中国国家自然科学基金;

关键词：

Cadmium sulfide; Cysteine desulfurase; Photocatalysts; Platinum; Recombinant Escherichia coli;

D O I：

10.1016/j.biteb.2021.100823

中图分类号：

学科分类号：

摘要：

Herein, we propose a facile synthetic strategy for biogenic photocatalyst by sequentially immobilizing CdS and Pt nanoparticles (NPs) on engineered recombinant Escherichia coli (e-E. coli) strains. In particular, we transferred the cysteine desulfurase gene to the heterologous host to overexpress cysteine desulfurase and the resulting e-E. coli strain could serve as a biofactory for the extracellular growth of CdS NPs involving catalyzing L-cysteine (Cys) to form a reactive sulfur source, followed by the precipitation of CdS via the reaction between Cd2+ ions and the locally concentrated active sulfur source around the strain. The subsequent modification of e-E. coli/CdS composites with noble metal Pt NPs further enhanced the catalytic degradation performance towards organic dyes, due to suppressing the recombination of the photogenerated electron-hole pairs. Accordingly, the ternary e-E. coli/CdS/Pt composites emerged as robust photocatalysts for pollutant degradation in waste-water treatment, which is promising for environmental remediation in ambient conditions. © 2021 Elsevier Ltd

引用