Abstract
In this work, porous indium oxide is synthesized by hydrothermal method. The In2O3 has been structurally and optically characterized by using XRD, XPS, FESEM and TEM techniques. The morphological studies have revealed the growth of self-assembled In2O3 nanoparticles which helpts to form a brick-like structure. The porous In2O3 nanoparticles have provided the large number of active sites for the adsorption of gas molecules which resulted in a quick sensor response of 6877 for 10 ppm of NO2 gas at very low temperature of 50 °C. Remarkably, the In2O3 sensor has shown the detection of NO2 gas down to 60 ppb.
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