Synthesis of porous rod-like In2O3 nanomaterials and its selective detection of NO at room temperature

• Published in: Journal of alloys and compounds 2022-05, Vol.902, p.163632, Article 163632
• Main Authors: Li, Qiaoyan, Huang, Ning, Cui, Yahan, Lin, Jiasheng, Zhao, Chun, Ding, Lan
• Format: Article
• Language: English
• Subjects: Carbon-doped; Gas sensors; High temperature; In2O3 nanomaterials; Indium oxides; Nanomaterials; NO sensing; Operating temperature; Response time; Room temperature
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2022.163632

•Porous rod-like In2O3 were synthesized via hydrothermal combined calcination method as the sensing material.•The growth process of porous rod-like In2O3 nanomaterials was verified by FTIR and TGA methods.•The response to NO at room temperature is enhanced due to the doping of carbon in In2O3.•The porous structure of In2O3 facilitates the diffusion of gas, shortening the response and recovery time. [Display omitted] The construction of gas sensors with excellent gas sensitivity and low operating temperature is of great importance while challenging. In this work, using indium nitrate, urea, and sucrose as precursors, In2O3 nanomaterials with the porous rod-like structure were prepared via hydrothermal method combined with high-temperature calcination. FTIR and TGA methods verified the growth process of porous rod-like In2O3 nanomaterials. Significantly, due to the doping of carbon in In2O3, the sensor based on porous rod-like In2O3 nanomaterials showed an enhancement response to NO at room temperature. The porous structure of In2O3 nanomaterials facilitates the diffusion of gas, shortening the response time. The developed materials provide insight into the fabrication of porous nanomaterials and the detection of NO at room temperature.