TY - JOUR AU - Le, Xuan Vuong AU - Duong, Vu Truong AU - Luu THI, Lan Anh AU - Pham, Van Thang AU - Nguyen, Huu Lam AU - Nguyen, Cong Tu PY - 2019/12/26 Y2 - 2024/03/28 TI - Composition of CNT and WO3 nanoplate: synthesis and NH3 gas sensing characteristics at low temperature JF - Journal of Metals, Materials and Minerals JA - J Met Mater Miner VL - 29 IS - 4 SE - Original Research Articles DO - 10.55713/jmmm.v29i4.539 UR - https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/539 SP - AB - <p>WO<sub>3</sub> nanoplate synthesized by acid precipitation method was composited with commercial carbon nanotube with different weight percents (0.5, 1.0, and 1.5 wt% of CNT). The ammonia gas sensing characteristics of composite materials at low temperature (50°C) were investigated and compared with that of pristine materials (WO<sub>3</sub> nanoplate, commercial carbon nanotube). The results showed that the composition enhanced the gas sensing properties in comparison with the pristine carbon nanotube-based sensor and more stable than pristine WO<sub>3</sub> nanoplate-based sensor. The response of gas sensors to 30 ppm of ammonia got the highest value of 45% in 0.5 wt%-CNT sensor – enhanced 100 times in comparison with carbon nanotube-based sensor. The calculated limit of detection of 0.5 wt%CNT/WO<sub>3</sub> sensor was at sub-trace-level of 3 ppb. This enhancement shows the high applicability of composite materials in gas sensor working at room temperature.</p> ER -