title: Research on benzene, toluene and dimethylbenzene detection based on a cataluminescence sensor.
abstract: We present a sensitive and quick way to determine benzene, toluene and dimethylbenzene (BTEX) in air, applying a cataluminescence (CTL) sensor based on a nano-sized composite material, γ-Al2O3/PtO2. The factors that affect the sensor's performance were studied, including the sensing material, temperature, rate of air carrier and wavelength. It was shown that when Pt accounted for 0.2% of the sensing material, the rate of the air carrier that carries target gas was 450 mL/min, the determination wavelength was 400 nm and temperature was 236 °C, this sensor showed the best CTL intensity to BTEX. In addition, the CTL intensity had a high linear relation with the concentration of BTEX, with a linear range from 0.5 to 100 mL/m(3), and a detection limit 0.22 mL/m(3). This nano-sized material had a quick response within 1.5 s, short recovery time within 1 min and a long lifetime, showing good potential for a variety of applications.
authors.affiliation: Environmental Science and Engineering Institute, Guangzhou University, 510006, Guangzhou, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Sun
authors.forename: Xiaoan
authors.initials: X
authors.lastname: Cao
authors.forename: Yonghui
authors.initials: Y
authors.lastname: Liu
authors.forename: Nijing
authors.initials: N
authors.lastname: Wang
authors.forename: Ruiwen
authors.initials: R
authors.lastname: He
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D001555:Benzene Derivatives / Q000032:analysis*; D002384:Catalysis; D008163:Luminescent Measurements; D010087:Oxides / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D014050:Toluene / Q000032:analysis*
chemical_list: D001555:Benzene Derivatives; D010087:Oxides; C514637:platinum oxide; D014050:Toluene; D010984:Platinum; D000537:Aluminum Oxide
keywords: BTEX; cataluminesence; chemiluminescence; gas sensor; γ-Al2O3/ PtO2