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Preparation of TiO2 Nanoparticles on Different SiO2 Supports by the Adsorption Phase Technique

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The influence of supports on the preparation of TiO2 nanoparticles by the adsorption phase technique is studied in detailed. Series temperature experiments of two types of supports (named as SiO2 A and B) were used. Energy-dispersive analysis by X-ray indicates that the concentration of TiO2 on both supports decreases with temperature increasing. TiO2 quantity on SiO2 A decreases sharply between 40° and 60°C, whereas the temperature range for SiO2 B is between 30° and 50°C. X-ray diffraction (XRD) shows that grain size of TiO2 particles on two SiO2 surfaces is all below 7 nm. It is also shown by XRD that particles on SiO2 A decrease sharply as in the quantity curve of TiO2, but particles on SiO2 B all change gradually and TiO2 particles on SiO2 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 TiO2.
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Document Type: Research Article

Affiliations: College of Material and Chemical Engineering, Zhejiang University, Hangzhou 310027, China

Publication date: January 1, 2008

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