文献类型：期刊文献

英文题名：Study of Synergistic Effect of Ce- and S-Codoping on the Enhancement of Visible-Light Photocatalytic Activity of TiO2

作者：Nasir, Muhammad;Xi, Zhenhao;Xing, Mingyang;Zhang, Jinlong[1];Chen, Feng;Tian, Baozhu;Bagwasi, Segomotso

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2013

卷号：117

期号：18

起止页码：9520

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20132016342564);WOS:【SCI-EXPANDED(收录号:WOS:000318892000055)】；

基金：This work has been supported by the National Nature Science Foundation of China (21173077, and 21237003); the National Basic Research Program of China (973 Program, 2010CB732306, 2013CB632403); the Project of International Cooperation of the Ministry of Science and Technology of China (No. 2011DFA50530); Science and Technology Commission of Shanghai Municipality (12230705000, 12XD1402200); the Research Fund for the Doctoral Program of Higher Education(20120074130001); and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Doping (additives) - X ray photoelectron spectroscopy - Photocatalysis - Infrared spectroscopy - Pore size - Sol-gel process - Synthesis (chemical) - Sol-gels - Spectrum analysis - X ray diffraction - Fourier transforms - Photoluminescence spectroscopy - High resolution transmission electron microscopy

摘要：Different samples of Ce- and S-codoped TiO2 nanoparticles were prepared through simple sol-gel synthesis method by using cerium nitrate hexahydrate as cerium precursor, thiourea as sulfur, and tetrabutyl titanate (TBOT) as titanium precursor. Characterization of prepared samples were done by various techniques such as, X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy, transmission electron microscopy, Fourier transformation infrared spectroscopy, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy. The XRD showed the presence of only anatase TiO2 for the single sulfur-doped and cerium- and sulfur-codoped titania samples. XRD analysis also pointed out the decrease in the crystal size with the increase in Ce concentration in the samples. The BET analysis reported an increase in the surface area and decrease in the pore size with the increase in the Ce concentration. The PLS results of the samples first showed a decrease in the intensity of the spectra sync with the reduction of recombination centers when the Ce was introduced in codoped TiO2 with the maximum decrease for 0.04 Ce/S-codoped titania; with the further increase in the Ce concentration in the samples, the intensity of the spectra gradually increased coinciding with the increase in the recombination centers. The recombination centers exhibit a direct relationship with the photocatalytic activity of the samples, which could be evidenced by the decolorization of 25 mg/L solution of AO-7. The activity of codoped samples was first increased by the incorporation of Ce with the maximum degradation for 0.04 cerium- and sulfur-codoped titania. By the further increase in the Ce amount in the Ce- and S-codoped titania samples the activity was shown to decrease gradually.