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Highly selective NH3 gas sensor based on Co(OH)2/Ti3C2T x nanocomposites operating at room temperature.

ABSTRACT: Ammonia (NH3) is a common air pollutant and is a biomarker for kidney disease. Therefore, the preparation of ammonia gas sensors with high sensitivity, good selectivity and low operating temperature is of great importance for health protection. Using the in situ electrostatic self-assembly approach, a chemoresistive gas sensor based on Co(OH)2/Ti3C2T x hybrid material was created in this study. The prepared samples were characterized by XRD, XPS, TEM, BET and other testing methods for structure, surface topography and elements. These samples were fabricated into sensors, and the gas sensing properties of the materials were investigated under different test conditions. The results show that the gas response value of the C/M-2 sensor is up to about 14.7%/100 ppm, which is three times the response value of the sensor made of pure MXene to NH3. In addition, the Co(OH)2/Ti3C2T x hybrid sensors exhibit excellent repeatability, high sensitivity under low concentration (less than 5 ppm), fast response/recovery time (29 s/49 s) and long-time stability, which indicates their promising utility in the IoT field.

SUBMITTER: Huang B 

PROVIDER: S-EPMC9672992 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Highly selective NH<sub>3</sub> gas sensor based on Co(OH)<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T <sub><i>x</i></sub> nanocomposites operating at room temperature.

Huang Bo B   Zhao Zhihua Z   Chen Pu P   Zhou Baocang B   Chen Zhuo Z   Fu Yu Y   Zhu Hongyu H   Chen Chen C   Zhang Shuaiwen S   Wang Anbiao A   Shi Pu P   Shen Xiaoqing X  

RSC advances 20221118 51

Ammonia (NH<sub>3</sub>) is a common air pollutant and is a biomarker for kidney disease. Therefore, the preparation of ammonia gas sensors with high sensitivity, good selectivity and low operating temperature is of great importance for health protection. Using the <i>in situ</i> electrostatic self-assembly approach, a chemoresistive gas sensor based on Co(OH)<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T <sub><i>x</i></sub> hybrid material was created in this study. The prepared samples were charact  ...[more]

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