Pechini法制备类钙钛矿型Nd2-xSrxCuO4及其性能表征  

Preparation using Pechini method & characterization of Nd2-xSrxCuO4 with perovskite-like structure

作　　者：奉少东 郭为民[1,2,3] 乐志文[1] 黄荣洲[1] 尹俊 FENG Shao-dong;GUO Wei-min;YUE Zhi-wen;HUANG Rong-zhou;YIN Jun(College of Biological and Chemical Engineering,Guangxi University of Science and Techonology,Liuzhou 545006,China;Guangxi Key Laboratory of Green Processing of Sugar Resources,Guangxi University of Science and Technology,Liuzhou 545006,China;Key Laboratory for Processing of Sugar Resources of Guangxi Higher Education Institutes,Guangxi University of Science and Technology,Liuzhou 545006,China)

机构地区：[1]广西科技大学生物与化学工程学院,广西柳州545006 [2]广西科技大学广西糖资源绿色加工重点实验室,广西柳州545006 [3]广西科技大学广西高校糖资源加工重点实验室,广西柳州545006

出　　处：《应用化工》2019年第11期2589-2593,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(21661007);广西高校优秀人才资助计划项目(2012)

摘　　要：采用Pechini法制备K2NiF4型类钙钛矿Nd2-xSrxCuO4(x=0,0.2,0.4,0.6,0.8)系列材料。分别使用XRD、FTIR、SEM、BET和H2-TPR等表征手段对合成的样品进行了分析。探究了柠檬酸比例和煅烧温度对目标产物形成的影响。分析了不同Sr掺杂比例对目标产物物相、性能的影响。结果表明,当柠檬酸、乙二醇与金属离子总物质的量之比为4∶4∶1,焙烧温度为800℃时,所制备的样品为单一物相的K2NiF4结构Nd2-xSrxCuO4系列材料,且样品具有较高的结晶度、颗粒分布较均匀。H2-TPR的结果表明,材料低温还原性能随Sr的掺杂而显著提高。Nd2-xSrxCuO4(x=0,0.2,0.4,0.6,0.8) family materials with K2NiF4 perovskite-like structure were prepared by the Pechini method.The prepared samples were characterized by XRD,FTIR,SEM,BET and H2-TPR methods,respectively.The effect of the amount of citric acid and the calcining temperature on the formation of the target products was investigated.The effects of Sr with different doping ratios on the phase and catalytic properties of the samples prepared were analyzed.The results show that the samples prepared are single phase with K2NiF4 perovskite-like structures,better crystallinity and uniform particles,when the ratio of the total amount of citric acid,ethylene glycol and metal ions is 4∶4∶1,and the calcination temperature is 800 ℃.H2-TPR test result shows that doping Sr can improve the reduction performance of as reported materials at low temperature.

关 键 词：类钙钛矿 Nd2-xSrxCuO4系列材料 Pechini法 催化性能 

分 类 号：TQ203.2[化学工程—有机化工] TM426.82[电气工程—电器]