Effect of Catalyst Morphology on the Performance of Submerged Nanocatalysis/Membrane Filtration System
Effect of Catalyst Morphology on the Performance of Submerged Nanocatalysis/Membrane Filtration System
复制标题
催化剂形态对浸没式纳米催化/膜过滤系统性能的影响
DOI：
10.1021/ie900033m
复制
发表时间：
2009-06
影响因子：
4.2
通讯作者：
Du Yan
中科院分区：
文献类型：
--
作者：
Jin Wanqin;Xing Weihong;Chen Rizhi;Wang Qinqin;Xu Nanping;Du Yan
纳米催化与膜过滤耦合系统（nanocatysis /MF）具有便于从反应混合物中原位分离纳米催化剂的特点。本研究以管状陶瓷膜为分离单元，开发了一种浸没式纳米催化/MF系统，用于在不同温度下氢退火得到的不同形貌的镍纳米颗粒上，液相加氢对硝基苯酚到对氨基苯酚。我们使用x射线衍射（XRD）、氮吸附、透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）对镍纳米颗粒进行了广泛的表征，并确定退火温度对镍纳米颗粒的粒径、比表面积和晶体形貌有显著影响。然后，我们评估了淹没纳米催化/MF系统的催化性能和分离效率。镍纳米颗粒在不同温度下退火。
Coupling systems of nanocatalysis and membrane filtration (nanocatalysis/MF) are features of convenience for the in situ separation of nanocatalysts from the reaction mixture. In this work, a submerged nanocatalysis/MF system with a tubular ceramic membrane as the separation unit was developed for the liquid-phase hydrogenation of p-nitrophenol to p-aminophenol over nickel nanoparticles with various particle morphologies obtained by hydrogen annealing at different temperatures. We extensively characterized the nickel nanoparticles using X-ray diffractometry (XRD), nitrogen adsorption, transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM), and we determined that the annealing temperature significantly influenced the particle size, specific surface area, and crystalline morphology of the nickel nanoparticles. We then evaluated the catalytic performance and separation efficiency of the submerged nanocatalysis/MF system. The nickel nanoparticles annealed at diffe...