Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 18    No. 2    April 2008

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Preparation of nanoanatase and its in situ XRD study
LI Guo-hua(李国华)1, 2, 3, ZHENG Yi-fan(郑遗凡)1, 2, MA Chun-an(马淳安)1, 2, 3, TIAN Wei(田 伟)1, 3

1. School of Chemical Engineering and Material Science, Zhejiang University of Technology,Hangzhou 310032, China;2. State Key Lab of Breeding Base of Green Chemistry-Synthesis Technology, Hangzhou 310032, China;3. Research Center of Nano Science and Technology, Zhejiang University of Technology, Hangzhou 310032, China

Abstract:Phase pure nanoanatase was prepared by sol-hydrolysis of TiCl4 in ammonium sulfate solution. In order to investigate the microstrain effect on nanoanatase transformation, the transformation process of the sample was investigated by in situ XRD. Based on the in situ XRD data, a variation of the diameter and its distribution, and the microstrain of nanotitania particles were estimated with Win XRD software. The results show that the transformation process of nanoanatase can be divided into four steps; a rate competition between the anatase growth and the transformation from anatase to rutile determines the diameter and its size distribution of anatase nanoparticles; and during the phase transformation, the microstrain determines the rates of anatase growth and its transformation.

 

Key words: nanoanatase; in situ XRD; phase transformation; size distribution; microstrain

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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