Ultrahigh-acetone-sensitivity sensor based on Pt-loaded TiO₂ porous nanoparticles synthesized via a facile hydrothermal method

Abstract

A simple hydrothermal method based on an orthogonal experimental design was used to synthesis the Pt-loaded TiO2 mesoporous nanoparticles in one step. The successful synthesis of Pt-loaded TiO2 nanoparticles was demonstrated by various characterization methods. The effects of the modification of the precious metal platinum and the explanation of its causes are described in detail by means of the test results. Through systematic gas sensitization tests, we found that the Pt-loaded TiO2 nanoparticles outperform pure TiO2 as gas sensors, with a high response value (S = 42.5) to 200 ppm acetone at 260 °C and 0.45 mm of film thickness. which is far superior to that of the pure TiO2. The response time and recovery time of the material are also relatively good with excellent selectivity and long-term stability.The material is anticipated to be effective for acetone detection.