Flower-like tungsten oxide particles: synthesis, characterization and dimethyl methylphosphonate sensing properties.
Flower-like WO(3) 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 WO(3) nanoflakes (38 Hz/ppm) at a DMMP concentration of 4ppm. Cross-sensitivity results revealed that flower-like WO(3) 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 WO(3) particle was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy.
Zhao
Yingqiang
Y
Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun Beiyitiao 2, Haidianqu, Beijing 100190, China.
Chen
Hongmin
H
Wang
Xiaoying
X
He
Junhui
J
Yu
Yunbo
Y
He
Hong
H