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Preparation of TiO 2 Nanoparticles on Different SiO 2 Supports by the Adsorption Phase Technique
Author(s) -
Jiang Xin,
Wang Ting
Publication year - 2008
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.1551-2916.2007.02020.x
Subject(s) - materials science , adsorption , nanoparticle , phase (matter) , grain size , transmission electron microscopy , diffraction , analytical chemistry (journal) , atmospheric temperature range , chemical engineering , nanotechnology , chemistry , optics , composite material , chromatography , physics , organic chemistry , engineering , meteorology
The influence of supports on the preparation of TiO 2 nanoparticles by the adsorption phase technique is studied in detailed. Series temperature experiments of two types of supports (named as SiO 2 A and B) were used. Energy‐dispersive analysis by X‐ray indicates that the concentration of TiO 2 on both supports decreases with temperature increasing. TiO 2 quantity on SiO 2 A decreases sharply between 40° and 60°C, whereas the temperature range for SiO 2 B is between 30° and 50°C. X‐ray diffraction (XRD) shows that grain size of TiO 2 particles on two SiO 2 surfaces is all below 7 nm. It is also shown by XRD that particles on SiO 2 A decrease sharply as in the quantity curve of TiO 2 , but particles on SiO 2 B all change gradually and TiO 2 particles on SiO 2 B are more uniform in transmission electron spectroscopy. The similarly of both supports is considered to be the reason for the similar changes in Ti concentration, and the different characteristics of the internal/external surface lead to variant quantity and grain size, as well as characteristics of TiO 2 .