SYNTHESIS OF WO3 NANORODS BY HYDROTHERMAL METHOD FOR CO GAS SENSOR APPLICATIONS

Authors

  • Pham Van Tong National University of Civil Engineering, Vietnam
  • Pham Thi Thuy Thu National University of Civil Engineering, Vietnam
  • Luong Minh Tuan National University of Civil Engineering, Vietnam

DOI:

https://doi.org/10.51453/2354-1431/2021/460

Keywords:

Cảm biến khí, thanh nano WO3, thuỷ nhiệt

Abstract

WO3 nanorods were synthesized through a simple, low-cost hydrothermal method using a soft template, followed by calcination. The morphology and crystal structure of the WO3 nanorods were examined by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). The gas sensors are fabricated by drop-casting and test for CO toxic gas at different temperatures in the concentration range from 100 ppm to 1000 ppm. The best performance was found at the working temperature of 400oC with the highest response of 2.7 to 1000 ppm CO. The sensor showed fast response/recovery time (7 s/11 s), and good stability after six consecutive measurement cycles. In addition, sensor selectivity has also been studied for CO, NH3, CO2, and CH4.

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Published

2021-08-17

How to Cite

Phạm , V. T., Phạm , T. T. T., & Lương , M. T. (2021). SYNTHESIS OF WO3 NANORODS BY HYDROTHERMAL METHOD FOR CO GAS SENSOR APPLICATIONS. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, 7(21). https://doi.org/10.51453/2354-1431/2021/460

Issue

Vol. 7 No. 21 (2021)

Section

Natural Science and Technology

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