Ultrasonic synthesis of MoO3 nanorods and their gas sensing properties

被引：182

作者：

Bai, Shouli ^{[1
]}

Chen, Song ^{[1
]}

Chen, Liangyuan ^{[2
]}

Zhang, Kewei ^{[1
]}

Luo, Ruixian ^{[1
]}

Li, Dianqing ^{[1
]}

Liu, Chung Chiun ^{[2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 174卷

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

Molybdenum oxide; Nanorods; Ultrasonic synthesis; Gas sensor; SENSOR; NO2; CO; EPR;

D O I：

10.1016/j.snb.2012.08.015

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Molybdenum oxide nanorods have been successfully synthesized by a simple probe ultrasonic approach. A possible growth mechanism of the MoO3 nanorods and the influence of ultrasonic times on morphologies have been investigated. The characterization results of field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and differential thermal analysis (DTA) demonstrate that the nanorods exhibits hexagonal molybdenum oxide (h-MoO3) and an irreversible phase transition occurs to form orthorhombic alpha-MoO3 after annealing at 436 degrees C. The gas sensing tests indicate that the MoO3 based sensor has high response to NO2 and the response is not interfered by CO and CH4 at operating temperature of 290 degrees C. The intrinsic sensing performance arises from the non-stoichiometry of MoO3 due to the presence of Mo5+ ions in the lattice of oxide. which has been confirmed by the results of X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analysis. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：51 / 58

页数：8

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