Premium
TiO 2 –Ag Nanocomposites by Low‐Temperature Sol–Gel Processing
Author(s) -
Li Hong,
Zhao Gaoling,
Chen Zhijun,
Song Bin,
Han Gaorong
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.1551-2916.2009.03441.x
Subject(s) - crystallite , nanocomposite , materials science , sol gel , photocatalysis , economies of agglomeration , chemical engineering , particle size , nanoparticle , molar ratio , metal , mineralogy , nanotechnology , metallurgy , chemistry , catalysis , organic chemistry , engineering
TiO 2 –Ag nanocomposites with well‐crystallized TiO 2 and randomly distributed metallic Ag nanoparticles were obtained at low temperature (about 50°C) by a modified sol–gel method. The size of TiO 2 crystallite was 5–6 nm. With the increasing Ag, Ag particle size increased and the size distribution broadened both due to the agglomeration of Ag crystallites. TiO 2 –Ag nanocomposites prepared in the present work showed better photocatalytic activity than pure TiO 2 prepared under the same conditions. An optimal photocatalyst was obtained when the molar ratio of Ag to Ti was 1:9.