A simple large-scale synthesis of mesoporous In2O3 for gas sensing applications

作者：Zhang, Su; Song, Peng^*; Yan, Huihui; Yang, Zhongxi; Wang, Qi^*

来源：Applied Surface Science, 2016, 378: 443-450.

DOI：10.1016/j.apsusc.2016.04.019

• Mesoporous
• In2O3
• Furfural alcohol
• Gas sensors

In this paper, large-scale mesoporous In2O3 nanostructures were synthesized by a facile Lewis acid catalytic the furfural alcohol resin (FAR) template route for the high-yield. Their morphology and structure were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential thermal and thermogravimetry analysis (DSC-TG) and the Brunauer-Emmett-Teller (BET) approach. The as-obtained mesoporous In2O3 nanostructures possess excellent mesoporous and network structure, which increases the contact area with the gases, it is conducive for adsorption-desorption of gas on the surface of In2O3. The In2O3 particles and pores were both about 15 nm and very uniform. In gas-sensing measurements with target gases, the gas sensor based on mesoporous In2O3 nanostructures showed a good response, short response-recovery time, good selectivity and stability to ethanol. These properties are due to the large specific surface area of mesoporous structure. This synthetic method could use as a new design concept for functional mesoporous nanomaterials and for mass production.

• 出版日期2016-8-15
• 单位济南大学