Synthesis of Ba-doped porous LaFeO_(3) microspheres with perovskite structure for rapid detection of ethanol gas

作     者：Pei Hao Guang-Min Qu Peng Song Zhong-Xi Yang Qi Wang Pei Hao;Guang-Min Qu;Peng Song;Zhong-Xi Yang;Qi Wang

作者机构：School of Material Science and EngineeringUniversity of JinanJinan 250022China Shandong Academy of Pharmaceutical SciencesJinan 250101China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第6期

页      面：1651-1661页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 0806[工学-冶金工程] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 080202[工学-机械电子工程] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos.61102006 and 51672110) the Natural Science Foundation of Shandong Province,China (Nos.ZR2018LE006 and ZR2015EM019) 

主　　题：Perovskite LaFeO_(3)microspheres Ba-doped Ethanol Gas sensors 

摘      要：In this work,porous La_(1-x)Ba_(x)FeO_(3)(x=0.01,0.02,0.03,0.04 and 0.05) microspheres of the orthorhombic perovskite phase were prepared by an environment-friendly one-step hydrothermal method with a series of characterization of the six sensing *** results show that their grain size is between 21.2 and 23.2 nm,and the grain growth is inhibited with the increase in Ba-doping *** samples are all spherical with a diameter of about 10 μm,and the surface is very *** the gas sensing study of the samples,the results show that the La_(1-x)Ba_(x)FeO_(3) sensor exhibits a fairly high response to the ethanol *** particular,the La_(1-x)Ba_(x)FeO_(3) microspheres with a Ba-doping concentration of 2 mol% showed not only a significant improvement in sensitivity but also a rather rapid response recovery time compared to the undoped samples,demonstrating the superiority as an ethanol sensing *** importantly,the optimum operating temperature of La0.98Ba0.02FeO_(3) is only 200℃,while that of the pure LaFeO_(3) is 260℃.The Ba-doped porous microspheres prepared are a high-performance sensing material capable of rapid and accurate detection of ethanol.