Fabrication of monodispersed hollow flower-like porous In2O3 nanostructures and their application as gas sensors

摘要

The solvothermal method using L-lysine as a surfactant and ethylene glycol as an efficient auxiliary was used to prepare mono-dispersed, hollow, flower-like porous (HFP) In2O3. The morphology of the materials was characterized through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In addition the structure and composition were analysed using X-ray powder diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The sensing performance of the In2O3 material for 500 ppb NO2 was evaluated at near room temperature 40 degrees C. The results revealed that the HFP-In2O3 exhibited better gas-sensing properties, indicating its practical potential for detecting NO2 at lower concentrations and temperatures.