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Sol-gel Synthesis of Porous Crystalline TiO2–P2O5 Oxide with Thermal Stability

Published online by Cambridge University Press:  31 January 2011

Donglin Li
Affiliation:
Institute of Energy Electronics, National Institute of Advanced Industrial Science and Technology (AIST), Umezono, 1-1-1, Tsukuba, 305-8568 Japan
Haoshen Zhou
Affiliation:
Institute of Energy Electronics, National Institute of Advanced Industrial Science and Technology (AIST), Umezono, 1-1-1, Tsukuba, 305-8568 Japan
Mitsuhiro Hibino
Affiliation:
Institute of Energy Electronics, National Institute of Advanced Industrial Science and Technology (AIST), Umezono, 1-1-1, Tsukuba, 305-8568 Japan
Itaru Honma
Affiliation:
Institute of Energy Electronics, National Institute of Advanced Industrial Science and Technology (AIST), Umezono, 1-1-1, Tsukuba, 305-8568 Japan
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Abstract

Porous TiO2–P2O5 oxide was synthesized by the sol-gel method in the presence of tri-block copolymer (EO)20(PO)70(EO)20 (Pluronic123) in queous solution. The TiO2 nanocrystals with anatase structure precipitated in the as-synthesized TiO2–P2O5 materials at 80°C, considerably lower than that for traditional heat treatment in the solid state, which maintained a stable size of 3.6–4 nm upon calcinations below 500°C. It is believed that P2O5 glass phase prevents the coarsening of TiO2 nanocrystals below 500°C. The mixed oxide exhibited a specific surface area of 170–200 m2/g after calcining in the temperature range of 300–500°C.

Type
Rapid Communications
Copyright
Copyright © Materials Research Society 2003

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