The Visible‐Light Photocatalytic Activity and Antibacterial Performance of Ag/AgBr/TiO 2  Immobilized on Activated Carbon | Zendy

Yang Lu | Zendy; Ye Fangyun | Zendy; Liu Peng | Zendy; Wang Fazhou | Zendy

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The Visible‐Light Photocatalytic Activity and Antibacterial Performance of Ag/AgBr/TiO 2 Immobilized on Activated Carbon

Author(s) -

Yang Lu,

Ye Fangyun,

Liu Peng,

Wang Fazhou

Publication year - 2016

Publication title -

photochemistry and photobiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.818

H-Index - 131

eISSN - 1751-1097

pISSN - 0031-8655

DOI - 10.1111/php.12653

Subject(s) - photocatalysis , visible spectrum , methylene blue , anatase , materials science , adsorption , absorption (acoustics) , irradiation , photochemistry , activated carbon , nuclear chemistry , chemistry , catalysis , organic chemistry , optoelectronics , composite material , physics , nuclear physics

Visible‐light‐driven Ag/AgBr/TiO 2 /activated carbon ( AC ) composite was prepared by solgel method coupled with photoreduction method. For comparison, TiO 2 , TiO 2 / AC , and Ag/AgBr/TiO 2 were also synthesized. Their characteristics were analyzed by XRD , SEM ‐ EDS , TG ‐ DSC and UV –vis techniques. Photocatalytic activity and antibacterial performance under visible‐light irradiation were investigated by ICP ‐ AES , ATR ‐ FT ‐ IR and spectrophotometry methods using methylene blue and Escherichia coli as target systems, respectively. The results showed that Ag/AgBr was successfully deposited on anatase TiO 2 / AC surface, and exhibited a distinct light absorption in the visible region. Ag/AgBr/TiO 2 / AC displayed excellent antibacterial performance both in dark and under visible‐light illumination. The growth of E. coli cell was inhibited in the presence of Ag/AgBr/TiO 2 / AC in dark. Moreover, upon visible‐light illumination, a significant damage of cell membrane was noticed. Ag/AgBr/TiO 2 / AC was also shown higher photocatalytic efficiency for methylene blue degradation than those of TiO 2 , TiO 2 / AC , and Ag/AgBr/TiO 2 . This is attributed to the synergetic effect between AC and Ag/AgBr/TiO 2 , of which AC acts as the role of increasing reaction areas, continuous enriching, and transferring the adsorbed MB molecules to the surface of supported photocatalysts, and the Ag/AgBr/TiO 2 acts as a highly active photocatalyst for degrading MB molecules under visible‐light irradiation.

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