文献类型：期刊文献

英文题名：Preparation of Nickel Nanoparticles in Spherical Polyelectrolyte Brush Nanoreactor and Their Catalytic Activity

作者：Zhu, Zhongming[1];Guo, Xuhong[1];Wu, Shuang[1];Zhang, Rui[1];Wang, Jie[1];Li, Li[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：50

期号：24

起止页码：13848

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20115114619285);WOS:【SCI-EXPANDED(收录号:WOS:000297946400031)】；

基金：We gratefully acknowledge the National Natural Science Foundation of China (No. 20774028 and 21004021), the Fundamental Research Funds for the Central Universities, the Key Basic Research Project of Shanghai Science and Technology Commission (10JC1403800), and the Scientific and Technological Project of Shanghai Science and Technology Commission (10111100103) for support of this work.

语种：英文

外文关键词：Sodium Borohydride - Polyelectrolytes - Nanocatalysts - Nanoparticles - Nickel - Size distribution - Rate constants

摘要：Nickel nanoparticles (Ni-NPs) with controlled size and narrow size distribution were successfully prepared in spherical poly (acrylic acid) (PAA) brushes (SPBs). The brushes act as nanoreactors for generating the Ni-NPs via adsorption of nickel ions in the brushes and subsequent reduction by addition of NaBH(4). The size of Ni-NPs can be well-controlled in several nanometers and with narrow size-distribution. Most interestingly, the size can be tuned by the reaction temperature: the average size increased from 3 to 7 nm upon increasing the reaction temperature from 273 to 303 K. The catalytic activity of these Ni-NPs trapped in SPBs were evaluated using a model reaction based on the reduction of 4-nitrophenol to 4-aminophenol by NaBH(4). The kinetic data were observed to follow the pseudofirst-order rate law, and the apparent rate constant was linearly dependent on the total surface area of the Ni-NPs and the reaction temperatures. This work opens a new way to prepare well-controlled Ni-NPs which should be ideal candidates for catalysts with high performance.