In2O3/SnO2 heterojunction microstructures: Facile room temperature solid-state synthesis and enhanced Cl2 sensing performance

TEM images, gas response of the sensor based on In2O3/SnO2 heterojunction microstructures (S4) exposed to Cl2 at concentrations ranging from 5 to 100 ppm at 260 °C, and schematic diagram of the proposed mechanism.