Cerium-yttrium binary oxide microflower:synthesis,characterization and catalytic dehydration property

作     者：Cheng Pan Ben-Hua Huang Chao Fan Xiao-Yong Li Pei-Gen Su A-Qun Zheng Yang Sun Cheng Pan;Ben-Hua Huang;Chao Fan;Xiao-Yong Li;Pei-Gen Su;A-Qun Zheng;Yang Sun

作者机构：Department of Applied ChemistrySchool of ScienceXi’an Jiaotong UniversityXi’an 710049China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第7期

页      面：1785-1800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] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the Natural Science Foundation of Shaanxi Province(No.2017JM2016) the Fundamental Research Funds for the Central Universities(No.xjj2014005) 

主　　题：Cerium-yttrium binary oxide Microflower Morphology Formation monitoring Catalytic dehydration 

摘      要：Cerium dioxide has a comparatively lower Ce4+/Ce3+redox pair,which leaves abundant oxygen vacancies on oxide lattice,also making incorporation of foreign ion and subsequent applications feasible and *** this work,a series of cerium-yttrium mixed oxides were prepared by using polyvinylpyrrolidone as major template through sol-gel,which were further employed as catalyst for dehydration of aniline with formic acid into *** reveal that synthetic samples have a variety of morphologies including nanoparticle,microflower,and uniform *** monitoring of particle size,zeta potential,and ultravioletvisible(UV-Vis)of preparative solution indicate that selfassembly of polyvinylpyrrolidone and its subsequent reaction with metal ion determines sample *** catalytic dehydration,all samples show high dehydration efficiencies that are comparable to those from anhydrous Na2SO4 and combination of dicyclohexylcarbodiimide with 4-dimethylaminopyridine and dichloromethane shows better outputs than *** association with structural analysis,cerium looks more active than yttrium,while yttrium mainly plays as a structure-directing and *** micro-/nanofabrication of rare earth composites and their catalytic applications.