Highly visible light active Ag@TiO2 nanocomposites synthesized using an electrochemically active biofilm: a novel biogenic approach

Title
Highly visible light active Ag@TiO2 nanocomposites synthesized using an electrochemically active biofilm: a novel biogenic approach
Author(s)
조무환칸모하마드만숩사지드안자리이진태아말무하마드이크라술
Keywords
PHOTOCATALYTIC ACTIVITY; SILVER NANOPARTICLES; AU-AT-TIO2 NANOCOMPOSITES; ANTIBACTERIAL ACTIVITIES; HYDROGEN-PEROXIDE; SOL-GEL; TIO2; AG; IRRADIATION; GENERATION
Issue Date
201305
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.5, no.10, pp.4427 - 4435
Abstract
Titanium dioxide (TiO2) nanoparticles were decorated with different amounts of silver nanoparticles (AgNPs) using an electrochemically active biofilm (EAB), which is a biogenic approach that leads to the formation of Ag@TiO2 nanocomposites. UV-vis spectroscopy, photoluminescence, X-ray diffraction and electron microscopy showed AgNPs, 2-5 nm in size, well-dispersed and anchored to the TiO2 surface and overall synthesis of Ag@TiO2 nanocomposites. The photocatalytic performance of the as-synthesized Ag@TiO2 nanocomposites was evaluated in terms of their efficiency for the photodecomposition of methylene blue (MB) in an aqueous solution under visible light irradiation. The nanocomposites showed exceptionally high photodecomposition efficiency (>7 times) compared to commercial TiO2 (Sigma). The enhanced photocatalytic activity was attributed to the synergistic contribution of both a delayed charge recombination rate caused by the high electronic mobility of the AgNPs and the increased surface area originating from the nanometer sized AgNPs on TiO2. The nanocomposites also showed exceptionally high stability and reusability under similar experimental conditions.
URI
http://hdl.handle.net/YU.REPOSITORY/25940http://dx.doi.org/10.1039/c3nr00613a
ISSN
2040-3364
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공과대학 > 화학공학부 > Articles
공과대학 > 신소재공학부 > Articles
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