Indium-organic framework CPP-3(In) derived Ag/In2O3 porous hexagonal tubes for H2S detection at low temperature

There is a great demand for high-performance hydrogen sulfide(H2S) sensors with low operating temperatures. Ag/In2O3hexagonal tubes with different proportions were prepared by the calcination of Ag+-impregnated indium-organic frameworks(CPP-3(In)), and the developed sensors exhibit enhanced gassensing performance toward H2S. Gas sensing measurements indicate that the response of Ag/In2O3(2.5 wt%) sensor to 5 ppm H2S has the highest response(119), operated at 70 °C. The Ag/In2O3(2.5 wt%)based sensor exhibits short response time(20 s), low detection limit(300 ppb), and good selectivity toward H2S gas, which imply that the CPP-3(In)-derived Ag/In2O3hexagonal tube is a promising candidate to be constructed a low power-consumption H2S sensor.