Highly Selective Gas Sensor Based on Litchi-like g-C<sub>3</sub>N<sub>4</sub>/In<sub>2</sub>O<sub>3</sub> for Rapid Detection of H<sub>2</sub>
oleh: Ji Zhang, Xu Li, Qinhe Pan, Tong Liu, Qingji Wang
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-12-01 |
Deskripsi
Hydrogen (H<sub>2</sub>) has gradually become a substitute for traditional energy, but its potential danger cannot be ignored. In this study, litchi-like g-C<sub>3</sub>N<sub>4</sub>/In<sub>2</sub>O<sub>3</sub> composites were synthesized by a hydrothermal method and used to develop H<sub>2</sub> sensors. The morphology characteristics and chemical composition of the samples were characterized to analyze the gas-sensing properties. Meanwhile, a series of sensors were tested to evaluate the gas-sensing performance. Among these sensors, the sensor based on the 3 wt% g-C<sub>3</sub>N<sub>4</sub>/In<sub>2</sub>O<sub>3</sub> (the mass ratio of g-C<sub>3</sub>N<sub>4</sub> to In<sub>2</sub>O<sub>3</sub> is 3:100) showeds good response properties to H<sub>2</sub>, exhibiting fast response/recovery time and excellent selectivity to H<sub>2</sub>. The improvement in the gas-sensing performance may be related to the special morphology, the oxygen state and the g-C<sub>3</sub>N<sub>4</sub>/In<sub>2</sub>O<sub>3</sub> heterojunction. To sum up, a sensor based on 3 wt% g-C<sub>3</sub>N<sub>4</sub>/In<sub>2</sub>O<sub>3</sub> exhibits preeminent performance for H<sub>2</sub> with high sensitivity, fast response, and excellent selectivity.