Au/mesoporous-TiO2 as catalyst for the oxidation of alcohols to carboxylic acids with molecular oxygen in water

被引：26
作者：
Zhou, Lipeng [1 ]
Chen, Minzhu [1 ]
Wang, Yougiang [1 ]
Su, Yunlai [1 ]
Yang, Xiaomei [1 ]
Chen, Chen [2 ]
Xu, Jie [2 ]
机构：
[1] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2014年 / 475卷
基金：
中国国家自然科学基金;
关键词：
Au; Mesoporous TiO2; Oxidation; Alcohol; Carboxylic acid; SELECTIVE OXIDATION; AEROBIC OXIDATION; CO OXIDATION; NANOPARTICLES; PERFORMANCE; TIO2; HYDROLYSIS; ZEOLITE; SOLVENT; SUPPORT;
D O I：
10.1016/j.apcata.2014.01.042
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Mesoporous TiO2 (meso-TiO2) with sharp pore size distribution was synthesized by hydrothermal method. The obtained meso-TiO2 is in pure anatase phase and presents spheric aggregates with diameter of 1.0-1.5 mu m, which consists of nanoparticles with size of 6-10 nm. Au supported on meso-TiO2 (Au/meso-TiO2) was prepared by urea deposition-precipitation method using HAuCl4 as gold source. The catalyst was characterized by X-ray diffraction, N-2 adsorption, transmission electron microscopy and UV-vis diffuse reflectance spectroscopy. The catalytic performance of Au/meso-TiO2 was studied in the oxidation of 1-pentanol to n-valeric acid with molecular oxygen as oxidant in water under basic conditions. It was found that meso-TiO2 is a better support for gold catalyst in the oxidation of 1-pentanol than NaY zeolite, hydrotalcite, and nano-TiO2. Deposition-precipitation time, calcination temperature and Au loading affected the catalytic performance of Au/meso-TiO2. The catalyst can also effectively catalyze the oxidation of aliphatic (C-3-C-10) and aromatic alcohols to the corresponding carboxylic acids. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：347 / 354
页数：8
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