文献类型：期刊文献

英文题名：A Brown Mesoporous TiO2-x/MCF Composite with an Extremely High Quantum Yield of Solar Energy Photocatalysis for H2 Evolution

作者：Xing, Mingyang[1,2];Zhang, Jinlong[1,2];Qiu, Bocheng[1,2];Tian, Baozhu[1,2];Anpo, Masakazu[3];Che, Michel[4,5]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem, Naka Ku, Sakai, Osaka 5998531, Japan;[4]Inst Univ France, F-75252 Paris 05, France;[5]Univ Paris 06, F-75252 Paris 05, France

年份：2015

卷号：11

期号：16

起止页码：1920

外文期刊名：SMALL

收录：;EI(收录号：20151700777789);WOS:【SCI-EXPANDED(收录号:WOS:000353301900007)】；

基金：The authors thank Prof. Fuqiang Huang and Dr. Zhou Wang from Chinese Academy of Sciences for valuable technical help. This work has been supported by National Nature Science Foundation of China (21203062, 21173077, 21377038, 21237003), the National Basic Research Program of China (973 Program, 2013CB632403), 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：Hydrogen production - Solar energy - Chemical activation - Fluorine - Quantum yield - Energy conversion efficiency - Oxygen vacancies - Photocatalysis - Semiconductor doping - Solar energy conversion - Mesoporous materials - Solar power generation

摘要：A brown mesoporous TiO2-x/MCF composite with a high fluorine dopant concentration (8.01 at%) is synthesized by a vacuum activation method. It exhibits an excellent solar absorption and a record-breaking quantum yield (Phi = 46%) and a high photon-hydrogen energy conversion efficiency (eta = 34%,) for solar photocatalytic H-2 production, which are all higher than that of the black hydrogen-doped TiO2 (Phi = 35%, eta = 24%). The MCFs serve to improve the adsorption of F atoms onto the TiO2/MCF composite surface, which after the formation of oxygen vacancies by vacuum activation, facilitate the abundant substitution of these vacancies with F atoms. The decrease of recombination sites induced by high-concentration F doping and the synergistic effect between lattice Ti3+-F and surface Ti3+-F are responsible for the enhanced lifetime of electrons, the observed excellent absorption of solar light, and the photocatalytic production of H-2 for these catalysts. The as-prepared F-doped composite is an ideal solar light-driven photocatalyst with great potential for applications ranging from the remediation of environmental pollution to the harnessing of solar energy for H-2 production.