Surfactant CATB-assisted generation and gas-sensing characteristics of LnFeO3 (Ln = La, Sm, Eu) materials
Surfactant CATB-assisted generation and gas-sensing characteristics of LnFeO3 (Ln = La, Sm, Eu) materials
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DOI：
10.1016/j.snb.2009.09.031
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发表时间：
2009-12-04
影响因子：
8.4
通讯作者：
Wang, Yude
中科院分区：
文献类型：
--
作者：
Chen, Ting;Zhou, Zhenlai;Wang, Yude
以无机前驱体和碱源（Ln-氯酸盐、FeCl3和NH4OH）为原料，采用阳离子表面活性剂CTAB（十六烷基三甲基溴化铵）辅助方法制备了粒径均匀的钙钛矿结构的LnFeO(3)（Ln=La、Sin和Eu）氧化物。对最终产品进行了表征，结果表明，经过850℃煅烧后，得到了纯净、高结晶钙钛矿结构的LnFeO(3)材料。以LnFeO(3)为敏感材料，在带有Au电极和铂丝的氧化铝管上制作了间接加热结构的气体传感器。研究了LnFeO(3)对丙酮、汽油和甲醛的气敏特性，并分别对丙酮(LaFeO3)、汽油(SmFeO3)和甲醛(EuFeO3)气体表现出良好的响应特性。基于LnFeO(3)氧化物的气体传感器使其成为监测环境中气体检测的有希望的候选者。 (C) 2009 Elsevier B.V. 保留所有权利。
Perovskite structure of LnFeO(3) (Ln = La, Sin, and Eu) oxides with uniform particle size was prepared by the cationic surfactant CTAB (cetyltrimethylammonium bromide) assisting method from the inorganic precursor and alkali source (Ln-chlorate, FeCl3 and NH4OH). The final products were characterized and the results showed that the pure and high crystalline perovskite structure of LnFeO(3) materials were obtained after calcining at 850 degrees C. Gas sensors of the indirect-heating structure using LnFeO(3) as sensitive materials were fabricated on alumina tube with Au electrodes and platinum wires. The gas-sensing characteristics of LnFeO(3) to acetone, gasoline, and formaldehyde were investigated and exhibited good response properties to acetone (LaFeO3) gasoline (SmFeO3), and formaldehyde (EuFeO3) gases, respectively. The LnFeO(3) oxides-based on gas sensors enable them to be promising candidates for the detection of the gases in monitoring environment. (C) 2009 Elsevier B.V. All rights reserved.