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Low-temperature synthesis of highly crystalline TiO2 nanocrystals and their application to photocatalysis

Cited 110 time in Web of Science Cited 115 time in Scopus
Authors
Han, Sang Jin; Choi, Sang-Hyun; Kim, Seok-Soon; Cho, Min; Jang, Byungchul; Kim, Dong-Yu; Yoon, Jeyong; Hyeon, Taeghwan
Issue Date
2005-08
Citation
Small, Vol.1 No.8-9, pp.812-816
Keywords
nanocrystalline materialsphotocatalysissot-gel processestitania
Abstract
Synthesis of highly crystalline TiO2 nanocrystals with various shapes and crystal structures from controlled aqueous sol-gel reactions at room temperature was investigated. The HRTEM image of these nanorods showed zigzag surface features with the [001] direction of the anatase being parallel to the long axis of the nanorods, which is very similar to the characteristics of the anatase nanorods. The BET surface areas of the spherical anatase nanocrystals, anatase nanorods, and rutile nanorods were found to be different in all the three. TiO2 nanocrystals with mixed crystal structures and various shapes were generated in the absence of the P-123 polymer. The results demonstrated that the presence of salt or acid was essential to synthesize the TiO2 nanocrystals with unique shapes and crystal structures and the P-123 controls the hydrolysis and condensation of the titanium tetraisopropoxide precursor.
ISSN
1613-6810
URI
http://hdl.handle.net/10371/165980
DOI
https://doi.org/10.1002/smll.200400142
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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