Highly Selective Detection of Benzene and Discrimination of Volatile Aromatic Compounds Using Oxide Chemiresistors with Tunable Rh-TiO₂ Catalytic Overlayers.

ABSTRACT: Volatile aromatic compounds are major air pollutants, and their health impacts should be assessed accurately based on the concentration and composition of gas mixtures. Herein, novel bilayer sensors consisting of a SnO₂ sensing layer and three different xRh-TiO₂ catalytic overlayers (x = 0.5, 1, and 2 wt%) are designed for the new functionalities such as the selective detection, discrimination, and analysis of benzene, toluene, and p-xylene. The 2Rh-TiO₂/SnO₂ bilayer sensor shows a high selectivity and response toward ppm- and sub-ppm-levels of benzene over a wide range of sensing temperatures (325-425 °C). An array of 0.5Rh-, 1Rh-, and 2Rh-TiO₂/SnO₂ sensors exhibits discrimination and composition analys

SUBMITTER: Moon YK 

PROVIDER: S-EPMC7967053 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature