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Enhanced Photocatalytic Disinfection of Escherichia coli Bacteria by Silver Modification of Nitrogen‐Doped Titanium Oxide Nanoparticle Photocatalyst Under Visible‐Light Illumination
Author(s) -
Sun Caixia,
Li Qi,
Gao Shian,
Cao Lihua,
Shang Jian Ku,
Shang Jian Ku
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03966.x
Subject(s) - photocatalysis , materials science , absorbance , silver oxide , titanium oxide , silver nanoparticle , visible spectrum , nanoparticle , titanium , titanium dioxide , oxide , nuclear chemistry , chemical engineering , inorganic chemistry , photochemistry , chemistry , nanotechnology , catalysis , chromatography , organic chemistry , composite material , optoelectronics , engineering , metallurgy
Enhanced photocatalytic disinfection of Escherichia coli ( E. coli ) bacteria under visible light illumination was achieved by a silver‐modified nitrogen‐doped titanium oxide (TiON/Ag 2 O) nanoparticle photocatalyst synthesized by a sol–gel process. In this photocatalytic material system, silver additives are beneficial to achieve better crystallization, larger surface area, higher pore volume, and enhanced visible light absorbance. The enhanced photocatalytic disinfection of E. coli by TiON/Ag 2 O was proven to be mostly attributed to the photocatalytic response of the TiON matrix and the subsequent coupling between TiON matrix and Ag 2 O nanoparticles, not the silver addition itself. The optimized silver modification concentration is determined at an Ag:Ti molar ratio of 1:50.