An Ultrasensitive Room-Temperature H₂ Sensor Based on a TiO₂ Rutile-Anatase Homojunction.

ABSTRACT: Metal oxide semiconductor hetero- and homojunctions are commonly constructed to improve the performance of hydrogen sensors at room temperature. In this study, a simple two-step hydrothermal method was employed to prepare TiO₂ films with homojunctions of rutile and anatase phases (denoted as TiO₂-R/A). Then, the microstructure of anatase-phase TiO₂ was altered by controlling the amount of hydrochloric acid to realize a more favorable porous structure for charge transport and a larger surface area for contact with H₂. The sensor used a Pt interdigital electrode. At an optimal HCl dosage (25 mL), anatase-phase TiO₂ uniformly covered rutile-phase TiO₂ nanorods, resulting in a greater response to H₂ at 2500 ppm compar

SUBMITTER: Wu X 

PROVIDER: S-EPMC10856964 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature