MOF-Derived In

MOF-derived MOS with mesoporous structures and large surface areas are regarded as ideal materials for fabricating high-performance gas sensors. In this study, we successfully synthesized MOF-derived In2O3/BiVO4 composites through a three-step method that includes solvothermal, hydrothermal, and mechanical stirring processes. The characterization results indicate that the In2O3/BiVO4 composites exhibit both hollow microtube and fishbone-like structures. Notably, under 200 °C, the response of the In2O3/BiVO4-2-based sensor to 100 ppm n-C4H9OH gas reaches as high as 149.2, which is 7.8-fold greater than that of pure In2O3. In addition, the In2O3/BiVO4-2 sensor demonstrates an ultralow theoretical detection threshold (12.6 ppb), satisfactory reproducibility, and remarkable selectivity to n-C4H9OH. By integrating experimental results with first-principles calculations, we elucidate the underlying mechanisms that enable In2O3/BiVO4 composites to exhibit remarkable responsiveness and exceptional selectivity toward n-C4H9OH gas. This research presents an innovative approach for creating high-performance n-C4H9OH gas-sensing materials.