材料科学
湿度
二氧化钛
氨
异质结
响应时间
相对湿度
基质(水族馆)
复合数
选择性
钛
光电子学
化学工程
纳米技术
复合材料
化学
冶金
催化作用
计算机科学
有机化学
工程类
生物化学
物理
计算机图形学(图像)
海洋学
热力学
地质学
作者
Yuxi Fei,Zizhuo Nie,Shujiang Ding,Jiuhong Wang,Ye Wang,Na Li,Yuhang Liu,Bo Peng,Xiao Feng,Limin Liu,Xinbing Jiang
标识
DOI:10.1002/cnma.202400053
摘要
Gas sensors for ammonia (NH3) play a crucial role in the maintenance of air quality, preservation of the atmosphere, and evaluation of human health. However, the endeavor to attain a high level of sensitivity in detecting NH3 under ambient conditions remains a challenging task. In this work, poly(3‐hexylthiophene)s and titanium dioxide (P3HT‐TiO2) heterostructure NH3 gas‐sensitive material was prepared, and by drop‐casting the material onto a substrate with Au interdigital electrodes, a sensor for high‐response detection of NH3 at room temperature was constructed. The designed gas sensor exhibited a high response signal of 114.61% toward 15 ppm NH3 at room temperature (25°C) with good reproducibility, strong long‐term stability, and excellent selectivity. Moreover, by analyzing the response law of the sensor under different humidity conditions, it has been noted that both excessively high and excessively low levels of humidity adversely affect the sensor’s response. The remarkable increase in NH3 sensing properties is attributed to the synergistic enhancement effect of P‐N heterojunction formed between P3HT and TiO2. This NH3 gas sensor exhibits tremendous potential for use due to its straightforward structure and outstanding ammonia sensing performance.
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