PdO/ZnO空心微球的合成及其在CH4催化氧化中的应用研究  

Synthesis of PdO/ZnO Hollow Spheres and Its Catalytic Performance in Complete Methane Oxidation

作　　者：左莹 李广社[2] 张婷 魏学红 ZUO Ying;LI Guangshe;ZHANG Ting;WEI Xuehong(Scientific Instrument Center,Shanxi University,Taiyuan 030006,China;State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University Changchun 130012,China)

机构地区：[1]山西大学大型科学仪器中心,山西太原030006 [2]吉林大学无机合成与制备化学国家重点实验室,吉林长春130012

出　　处：《山西大学学报（自然科学版）》2019年第4期892-897,共6页Journal of Shanxi University(Natural Science Edition)

基　　金：山西省青年科技研究基金(201701D221031);2015年中央提升人才事业启动经费(304545006)

摘　　要：采用溶剂热法,在硝酸锌和醋酸锌摩尔比为1∶5时合成ZnO空心微球,并以此为载体,采用光沉积焙烧两步法对其进行PdO的负载,得到PdO/ZnO空心微球复合材料。通过X射线衍射、扫描电子显微镜、透射电子显微镜和X射线光电子能谱对材料进行了表征。结果表明,粒径在3 nm左右的PdO纳米颗粒以21.7%的分散度均匀负载于ZnO空心微球表面,PdO负载率达100%。在复合材料的催化作用下,CH4在420℃即可实现100%转化,且PdO/ZnO空心微球经过5次性能循环测试都没有任何失活迹象。Hollow structure ZnO was obtained by controlling the molar ratio of NO-3 to CH3COO- in the solvothermal reaction. Taking ZnO hollow sphere as a support, PdO/ZnO catalyst was prepared by a two-step method based on photo-deposition and a subsequent calcination procedure.The samples were systematically characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. As a consequence, PdO nanoparticles with a small size around 3 nm were homogeneously dispersed on the surface of ZnO hollow spheres. The loaded material exhibits a high efficiency of 100%and a 21.7% dispersion on ZnO. When tested as a catalyst for CH4 combustion, the PdO/ZnO hybrids showed a 100% CH4 conversion at 420℃. No signs of deactivation were observed even when catalytic performance was repeated for five runs.

关 键 词：ZNO PDO 催化 CH4 

分 类 号：O643[理学—物理化学]