Hydrothermal Synthesis and Ammonia Sensing Properties of WO3/Fe2O3 Nanorod Composites

被引：0
|
作者：
Nguyen Dac Dien
Luong Huu Phuoc
Vu Xuan Hien
Dang Duc Vuong
Nguyen Duc Chien
机构：
[1] Hanoi University of Science and Technology (HUST),School of Engineering Physics (SEP)
来源：
Journal of Electronic Materials | 2017年 / 46卷
关键词：
WO; /Fe; O; nanocomposite; gas sensor; hydrothermal process;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
WO3 nanorods (NRs) and α-Fe2O3 NRs were fabricated by hydrothermal treatment. Composites of these materials were created by mixing with ratios of 1:2, 1:1 and 2:1 in weight. Morphology, structure and composition characteristics of the WO3/Fe2O3 NRs composites were characterized by scanning electron microscopy, x-ray diffraction and energy dispersive x-ray spectroscopy analyses. The results of sensing measurements indicated that the sensor based on WO3:Fe2O3 with the ratio of 2:1 exhibited fairly good sensitivity toward NH3 at 300°C and the sensor based on WO3:Fe2O3 with the ratio of 1:1 can be used as a NH3 sensor with an operating temperature of 350°C. Selectivity and response–recovery times are suitable for practical applications. Finally, the mechanism for the improvement in the gas-sensing property was discussed.
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页码：3309 / 3316
页数：7
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