Oxygen vacancies enhancing acetone-sensing performance

Abstract Cd-doped In2O3 was synthesized by a facile solvothermal, template-free preparation method. The phase structure and properties were characterized by various methods. The surface of Cd-doped In2O3 became coarse compared with that of pure In2O3, according to the scanning electron microscopeimages, which enhanced the ability to absorb the gas. The electron paramagnetic resonance showed that the Cd-doped In2O3 can generate more defects and oxygen vacancies. By measuring the gas sensitivity, the response of Cd-doped In2O3 was 1.6 times than that of pure In2O3. Thus, Cd-doped In2O3 can promote gas-sensing performance compared with pure In2O3.