tailieunhanh - Báo cáo hóa học: " Preparation of Highly Crystalline TiO2 Nanostructures by Acid-assisted Hydrothermal Treatment of "

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Preparation of Highly Crystalline TiO2 Nanostructures by Acid-assisted Hydrothermal Treatment of | Nanoscale Res Lett 2010 5 1829-1835 DOI s11671-010-9720-0 NANO EXPRESS Preparation of Highly Crystalline TiO2 Nanostructures by Acid-assisted Hydrothermal Treatment of Hexagonal-structured Nanocrystalline Titania Cetyltrimethyammonium Bromide Nanoskeleton Shuxi Dai Yanqiang Wu Toshio Sakai Zuliang Du Hideki Sakai Masahiko Abe Received 28 May 2010 Accepted 26 July 2010 Published online 11 August 2010 The Author s 2010. This article is published with open access at Abstract Highly crystalline TiO2 nanostructures were prepared through a facile inorganic acid-assisted hydrothermal treatment of hexagonal-structured assemblies of nanocrystalline titiania templated by cetyltrimethylammonium bromide Hex-ncTiO2 CTAB Nanoskeleton as starting materials. All samples were characterized by X-ray diffraction XRD and transmission electron microscopy TEM . The influence of hydrochloric acid concentration on the morphology crystalline and the formation of the nanostructures were investigated. We found that the morphology and crystalline phase strongly depended on the hydrochloric acid concentrations. More importantly crystalline phase was closely related to the morphology of TiO2 nanostructure. Nanoparticles were polycrystalline anatase phase and aligned nanorods were single crystalline rutile phase. Possible formation mechanisms of TiO2 nanostructures with various crystalline phases and morphologies were proposed. The authors Shuxi Dai and Yanqiang Wu contributed equally to this work. S. Dai Y. Wu Z. Du Key Laboratory for Special Functional Materials of Ministry of Education Henan University Kaifeng 475004 People s Republic of China e-mail zld@ S. Dai H. Sakai M. Abe Department of Pure and Applied Chemistry Faculty of Science and Technology Tokyo University of Science Chiba Noda 278-8510 Japan e-mail hisakai@ T. Sakai Internaltional Young Researchers Empowerment Center Shinshu University Wakasato Nagano 380-8553 Japan Keywords .