文献类型：期刊文献

英文题名：Enhanced Photoactivity of Oxygen-Deficient Anatase TiO₂ Sheets with Dominant {001} Facets

作者：Liu, Gang[1,2,3];Yang, Hua Gui[4];Wang, Xuewen[3];Cheng, Lina[1,2];Lu, Haofeng[3];Wang, Lianzhou[1,2];Lu, Gao Qing (Max)[1,2];Cheng, Hui-Ming[3]

机构：[1]Univ Queensland, Sch Engn, ARC Ctr Excellence Funct Nanomat, Brisbane, Qld 4072, Australia;[2]Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia;[3]Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China;[4]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2009

卷号：113

期号：52

起止页码：21784

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000272936400045)】；

基金：The financial support from the Major Basic Research Program, Ministry of Science and Technology of China (No. 2009CB220001), NSFC (No. 50921004), the KJCX2-YW-H21-01, and the Solar Energy Program of the Chinese Academy of Sciences, the IMR SYNL-T.S. KC Research Fellowship, the Australian Research Council through its Centre's Grant and DP0666345, and Pujiang Talents Program of Science and Technology Commission of Shanghai Municipality (09PJ1402800) is gratefully acknowledged.

语种：英文

摘要：Constructing photocatalytically favorable Surface structure in synthesizing photocatalysts plays an important role in enhancing the photocatalytic activity of semiconductor photocatalysts. In this report, oxygen-deficient anatase TiO2 sheets with dominant {001} facets were synthesized via a facile one-pot hydrothermal route with solid metallic titanium diboride as precursor. In contrast to anatase TiO2 sheets with dominant {001} facets free of oxygen deficiency and surface fluorine, anatase TiO2 sheets with oxygen deficiency and surface fluorine are Subject to obvious surface reconstruction as evidenced by two new Raman-active modes at 155 and 171 cm(-1) and the weakened B-1g mode at 397 cm(-1). Further analysis based on X-ray photoelectron spectroscopy (XPS) spectra of Pt 4f and F Is provided a clear evidence for the greatly strengthened interaction between Pt-loaded and TiO2 matrix as a result of a special electron-transfer process on the reconstructed Surface structure of TiO2 with both oxygen deficiency and fluorine. Importantly, the reconstructed surface structure as well as the strengthened interaction between Pt-loaded and TiO2 matrix can substantially enhance the hydrogen evolution rate from photocatalytic water splitting reactions.