Short communication Metal-organic framework-derived Au-In2O3 nested hierarchical structures for ethanol detection at room temperature

As a common volatile organic compound (VOC), ethanol plays an important role in daily life, but its flammable and explosive properties pose a potential threat to human life safety. Therefore, it is necessary to detect ethanol gas at room temperature. We synthesized In-BTC by oil bath method, calcined the In2O3 nested hierarchical structure, and finally obtained Au-In2O3 nested hierarchical structure by liquid phase reduction method. Through the characterization results, it can be found that Au-In2O3 nested hierarchical structure has been successfully synthesized. The gas sensing results show that the response of the Au-In2O3 nested hierarchical structure sensor under 50 ppm ethanol gas is about 18.96 at room temperature, and the response/ recovery time is 5 s and 11 s, respectively. At the same time, the sensor exhibits good selectivity and stability. Therefore, the Au-In2O3 nested hierarchical structure prepared in this paper has good sensing performance for ethanol, so it has broad application prospects in monitoring and detecting ethanol gas.

Automated summary

In this study, Au-In2O3 nested hierarchical structure was successfully synthesized and found to have good gas sensing performance for ethanol, making it capable of detecting ethanol gas at room temperature.