Shewanella oneidensis MR-1 in situ biosynthesis of Ag nanoparticles on TiO 2 nanotubes with enhanced photocatalytic performance

Micro & nano letters

article

Xiaojie Song¹  Fan Yang²  Xiufang Wang¹  Kehua Zhang¹ 

[1] School of Materials and Chemical Engineering, Anhui Jianzhu University;Department of Chemistry, Anhui Medical University

关键词: nanocomposites;    titanium compounds;    nanoparticles;    silver;    microorganisms;    ultraviolet spectra;    nanotubes;    nanofabrication;    visible spectra;    photocatalysis;    photocatalysts;    Shewanella oneidensis MR-1;    in situ biosynthesis;    titania nanotubes;    biogenetic nanocomposites research;    dissimilatory metal-reducing bacterium;    in-situ formation;    visible-light absorption efficiency;    superior photocatalytic efficiency;    single titania nanomaterials;    anaerobic conditions;    time 30.0 min;    Ag-TiO2;   

DOI  :  10.1049/mnl.2020.0285

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Biogenetic nanocomposites research provides valuable methods for the green synthesis of nanomaterials. As a dissimilatory metal-reducing bacterium, Shewanella oneidensis MR-1 is used to reduce Ag + to Ag nanoparticles (Ag NPs) (diameter about 10 nm) under anaerobic conditions, resulting in the in-situ formation of Ag NPs immobilised on TiO 2 nanotubes (TNTs) (Ag/TNTs nanocomposites). The loading amount of Ag nanocrystals on the TNT surface can be controlled easily through adjusting the AgNO 3 concentration and further influence visible-light absorption efficiency of Ag/TNTs nanocomposites by decreasing the Ag loading amount. Ag/TNTs nanocomposites show superior photocatalytic efficiency under simulated sunlight than single TiO 2 nanomaterials. Moreover, the photocatalytic capacity of Ag/TNTs nanocomposites synergistic by S. oneidensis MR-1 is further enhanced and the degradation ratio of methylene blue reaches 92.3% within 30 min which attributed to a synergistic effect.

【 授权许可】

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