Indium Oxide Decorated WS2 Microflakes for Selective Ammonia Sensors at Room Temperature

Tungsten sulfide decorated with indium oxide nanoparticles (In2O3/WS2) was studied for a chemiresistive-type NH3 sensor at room temperature. It found that the responses of developed In2O3/WS2 heterostructure nanocomposite-based sensors are significantly improved to 3.81 from 1.45 WS2. The response and recovery time heterostructure-based decrease 88 s/116 s (10 ppm) 112 s/192 WS2-based one. also exhibits excellent selectivity signal reproducibility. In comparison WS2 both ZnO SnO2 in similar ways, In2O3-decorated has overall better sensing performance terms sensitivity, response/recovery speeds 1 ppm 10 properties incorporating In2O3 could be attributed joint enhancement mechanisms “electronic catalytic” sensitizations.