Authors: Xishun Jiang Yafang Zhang Zhongwei Li Yunfang Ren Miao Zhang Gang He Xueping Song Zhaoqi Sun
Publish Date: 2014/12/28
Volume: 26, Issue: 4, Pages: 2070-2075
Abstract
Anatase TiO2 microspheres have been prepared by hydrothermal method and the reaction concentrations of mix solution containing hydrofluoric acid HF and ammonium fluoride NH4F are 01 02 and 04 M respectively Microstructure morphology chemical composition optical and photoelectronchemical properties of the asdeposited thin films were investigated in detail XRD analysis shows that the grain size of the microspheres increases with increasing the reaction concentration The films deposited at 01 and 02 M are formed by wellfaceted regular microspheres with the size of 2–3 μm XPS measurement indicates that the atomic ratio of TiO is estimated to be 1205 for the sample deposited at 02 M The band gap is close to the standard values of anatase TiO2 32 eV as the reaction concentration increases The photocurrent of TiO2 film deposited for 01 M reaction concentration is around three times as strong as those for 02 and 04 M under the same illumination Current results will help to synthesise desired TiO2 films and expand its applicationsThis work is supported by the National Natural Science Foundation of China Nos 51272001 and 51472003 National Key Basic Research Program 2013CB632705 the National Science Research Foundation for Scholars Return from Overseas Ministry of Education China Science Foundation for The Excellent Youth Talents of Chuzhou University 2013RC007 Research Project of Chuzhou University 2014KJ01 and Innovation Entrepreneurship Training Program for College Students of Chuzhou University 2014CXXL036 The authors would like to thank Zhongqing Lin of the Experimental Technology Center of Anhui University for electron microscope test and discussion
Keywords: