In2O3 Hollow porous nanospheres loaded with Ag nanoparticles to achieve wide concentration range triethylamine detection

Triethylamine (TEA) is a volatile organic compound (VOC) that is detrimental to production safety, environment, and human health. It is necessary to prepare a gas sensor with high sensitivity and selectivity for real-time monitoring of TEA. Here, In2O3 hollow porous nanospheres (HPNSs) loaded with Ag nanoparticles were prepared and the sensing properties to TEA were researched. The 5wt%Ag-In2O3 gas sensor exhibited high sensitivity (20,059 to 100 ppm), low concentration detection (6.11 to 0.1 ppm), extremely good selectivity, and stability to TEA at 350 °C. Our work highlights the potential of using metal-organic frameworks as a precursor to prepare In2O3 hollow porous nanospheres combined with the catalysis of Ag for TEA gas detection.