Hollow nano-particles formation for CuO-CeO2-ZrO2 via a supercritical anti-solvent process

作     者：姜浩锡 周佳丽 孙焕花 李永辉 张敏华 JIANG Haoxi;ZHOU Jiali;SUN Huanhua;LI Yonghui;ZHANG Minhua

作者机构：Key Laboratory for Green Chemical Technology of Ministry of EducationR&D Center for Petrochemical TechnologyTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2016年第34卷第11期

页      面：1126-1133页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China(20976120) Natural Science Foundation of Tianjin(09JCYBJC06200) 

主　　题：supercritical anti-solvent (SAS) CuO-CeO2-ZrO2 nano-particulate hollow structure rare earths 

摘      要：Hollow CuO-CeO2-ZrO2nano-particles were prepared with supercritical anti-solvent apparatus by using methanol as sol-vent and supercritical carbon dioxide as anti-solvent. Two key factors （i.e., pressure and temperature） were investigated to explore the effects of catalyst structure and physic-chemical properties （i.e., morphology, reducing property, oxygen storage capacity and specific surface area）. The resulting materials were characterized with X-ray diffraction （XRD）, high resolution transmission electron micros-copy （HRTEM）, Brunauer-Emmett-Teller （BET）,hydrogen temperature programmed reduction （H2-TPR） and oxygen storage capac-ity （OSC） measurement, respectively. The experimental results showed that lower temperatures promoted production of hollow struc-ture nano-particulates. The particle morphology also changed significantly, i.e. the solid construction was first transferred to hollow structure then back to solid construction. The optimal conditions for obtaining hollow nano-particles were determined at 45 °C, 18.0–24.0 MPa.