Research on benzene, toluene and dimethylbenzene detection based on a cataluminescence sensor. (17th May 2013)

• Record Type: Journal Article
• Authors: Sun, Yan; Cao, Xiaoan; Liu, Yonghui; Wang, Nijing; He, Ruiwen
• Is Part Of: Luminescence. Volume 29:Number 2(2014:Mar./Apr.)
• Page Start: 122
• Page End: 126
• Publication Date: 2013-05-17
• Subjects: BTEX -- cataluminesence -- chemiluminescence -- gas sensor -- γ‐Al2O3/ PtO2; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.2514
• Languages: English
• ISSNs: 1522-7235

Abstract

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‐Al2 O3 /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. Copyright © 2013 John Wiley & Sons, Ltd.