Ultra-fast and low detection limit of H2S sensor based on hydrothermal synthesized Cu7S4-CuO microflowers

In this work, Cu7S4-CuO microflowers were successfully synthesized through a simple hydrothermal route. The influence of S doping amount on the corresponding microstructures and gas sensing properties of the composites are investigated. In the comparative gas sensing test, the sensor fabricated from Cu7S4-CuO (S/Cu = 27 mol%) microflowers exhibited the highest response (156–50 ppm) to hydrogen sulfide with a fast response and recovery time....