Nanoparticles Assembled CdIn₂O₄ Spheres with High Sensing Properties towards n-Butanol

Cd/In-glycerate spheres are synthesized through a simple solvothermal method. After thermal treatment, these Cd/In-glycerates can be converted into CdIn₂O₄ spheres. Many characterization methods were performed to reveal the microstructure and morphology of the CdIn₂O₄. It was found that pure CdIn₂O₄ phase was obtained for the Cd/In starting materials at ratios of 1:1.6. The CdIn₂O₄ spheres are composed by a large number of nanoparticles subunits. The CdIn₂O₄ sphere-based sensor exhibited a low detection limit (1 ppm), high response (81.20 to 500 ppm n-butanol), fast response (4 s) and recovery (10 s) time, good selectivity, excellent repeatability, and stability at 280 °C. Our findings highlight the possibility to develop a novel gas sensor based on CdIn₂O₄ for application in n-butanol detection with high performance.