文献类型：期刊文献

英文题名：Gold Nanoparticles Intercalated into the Walls of Mesoporous Silica as a Versatile Redox Catalyst

作者：Chen, Lifang[2];Hu, Juncheng[1];Qi, Zhiwen[2];Fang, Yunjin[2];Richards, Ryan[3]

机构：[1]S Cent Univ Nationalities, Key Lab Catalysis & Mat Hubei Prov, Wuhan 430074, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Colorado Sch Mines, Dept Chem & Geochem, Golden, CO 80401 USA

年份：2011

卷号：50

期号：24

起止页码：13642

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20115114619241);WOS:【SCI-EXPANDED(收录号:WOS:000297946400006)】；

基金：This work was supported by the National Natural Science Foundation of China (20803096, 21006029, 21076074), NSF of Hubei Province (Distinguished Young Investigator Grant 2010CDA082), Shanghai Pujiang Talents Programme (10PJ1402400), Shanghai Scientific and Technological Commission (09DZ1120200), Shanghai Natural Science Foundation (10ZR1407200), the Programme of Introducing Talents of Discipline to Universities (111 Project), and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：Metal nanoparticles - Aromatic compounds - Silica - Catalyst activity - Mesoporous materials - Nanocatalysts - Fiber optic sensors

摘要：A nanoscaled reactor framework of well-dispersed gold particles intercalated into the walls of mesoporous silica (GMS) was prepared by functionalizing silica with thioether groups. The GMS maintains mesoporous structure with uniform pores of 5.6 nm and possesses high surface area of more than 800 m(2).g(-1). Very recently, we reported that the GMS catalyst was very active for the oxidation of alkanes and alcohols but was also durable and recyclable. Here, we show that the catalyst is also very active for the reduction of p-nitrophenol (PNP) and methylene blue (MB) displaying catalytic activity in the reduction of PNP with Knor-PNP of 45.9 mmol(-1).s(-1). The unobstructed ordered mesoporous structure of the GMS catalyst and the small size of gold nanoparticles are the main factors leading to high catalytic activities. Further, for reduction of MB, the catalytic rate of the catalyst decreases by less than 6% when recycled 10 times. Therefore, the nanoreactor framework catalyst is very robust and is readily separable and reusable, demonstrating attractive potential for practical applications.