Open AccessShewanella oneidensis MR‐1 in situ biosynthesis of Ag nanoparticles on TiO 2 nanotubes with enhanced photocatalytic performance
Author(s) -
Song Xiaojie,
Yang Fan,
Wang Xiufang,
Zhang Kehua
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0285
Subject(s) - shewanella oneidensis , photocatalysis , nanocomposite , nanomaterials , materials science , methylene blue , shewanella , chemical engineering , nanoparticle , nanotechnology , visible spectrum , nuclear chemistry , catalysis , chemistry , bacteria , organic chemistry , optoelectronics , genetics , engineering , biology
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.