Flower-like tungsten oxide particles: Synthesis, characterization and dimethyl methylphosphonate sensing properties

被引：21
作者：
Zhao, Yingqiang [1 ,2 ,3 ]
Chen, Hongmin [1 ,2 ]
Wang, Xiaoying [4 ]
He, Junhui [1 ,2 ]
Yu, Yunbo [4 ]
He, Hong [4 ]
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Funct Nanomat Lab, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[4] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
来源：
ANALYTICA CHIMICA ACTA | 2010年 / 675卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Flower-like; Tungsten oxide; Quartz crystal microbalance; Gas sensor; Dimethyl methylphosphonate; WO3; POWDERS; SPECTROSCOPY; NANOCRYSTALS;
D O I：
10.1016/j.aca.2010.06.032
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Flower-like WO3 particles with high specific surface area were synthesized via a template/surfactant-free way. Scanning and transmission microscopies and X-ray diffraction were applied to investigate the formation mechanism of the morphology. Gas sensing characterization showed an enhanced sensitivity (70 Hz/ppm) to dimethyl methylphosphonate (DMMP) as compared with previously reported WO3 nanoflakes (38 Hz/ppm) at a DMMP concentration of 4 ppm. Cross-sensitivity results revealed that flower-like WO3 still showed sound sensitivity in presence of interfering agents, which benefited from its intrinsic high sensitivity. The mechanism of DMMP adsorption on the flower-like WO3 particle was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：36 / 41
页数：6
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