Mesoporous TiO_2/Carbon Beads: One-Pot Preparation and Their Application in Visible-Light-Induced Photodegradation

作     者：Xiaowei Li Yanqiu Jiang Wenjing Cheng Yudong Li Xianzhu Xu Kaifeng Lin 

作者机构：Academy of Fundamental and Interdisciplinary Sciences Harbin Institute of Technology 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2015年第7卷第3期

页      面：243-254页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by Natural Science Foundation of China(21303031,21353004,51472062) Natural Science Foundation of Heilongjiang Province of China(B201010) Fundamental Research Funds for the Central Universities(HIT.IBRSEM.201326) Program for Science&Technology Innovation Talent in Harbin(2013RFQXJ004,2007RFXXG018) China Postdoctoral Science Foundation(2012T50334,20100480991) 

主　　题：Ti O2nanoparticles Mesoporous carbon Composite bead Visible light Easy separation 

摘      要：Mesoporous Ti O2/Carbon beads have been prepared via a facile impregnation-carbonization approach, in which a porous anion-exchange resin and K2 Ti O(C2O4)2were used as hard carbon and titanium source, *** results reveal that the self-assembled composites have disordered mesostructure, uniform mesopores,large pore volumes, and high surface areas. The mesopore walls are composed of amorphous carbon, well-dispersed and confined anatase or rutile nanoparticles. Some anatase phase of Ti O2 was transformed to rutile phase via an increase of carbonization temperature or repeated impregnation of the resin with Ti O(C2O4)22-species. X-ray photoelectron spectroscopy, carbon, hydrogen, and nitrogen element analysis, and thermal gravity analysis results indicate the doping of carbon into the Ti O2 lattice and strong interaction between carbon and Ti O2 nanoparticles. A synergy effect by carbon and Ti O2 in the composites has been discussed herein on the degradation of methyl orange under visible light. The dye removal process involves adsorption of the dye from water by the mesopores in the composites, followed by photodegradation on the separated dye-loaded catalysts. Mesopores allow full access of the dye molecules to the surface of Ti O2 ***, the bead format of such composite enables their straightforward separation from the reaction mixture in their application as a liquid-phase heterogeneous photodegradation catalyst.