A Cataluminescence-Based Sensor for Detecting Benzene, Toluene and Xylene Vapors Utilizing the Catalytic Reduction on the Surface of Nanosized Al₂O₃/Pt

Abstract:

A new gas sensor was designed based on cataluminescence (CTL) by using catalytic reduction of benzene, toluene and xylene (BTEX) on the surface of nanosized catalyst Al₂O₃/Pt with hydrogen as the carrier gas. The result indicated that the sensor showed strong CTL response, high selectivity and excellent durability under optimal conditions: Al₂O₃/Pt (1%), the temperature of 395oC, the wavelength of 425 nm and the flow rate of 270 mL/min. The detection limit (3σ) is 0.2 ppm for benzene, 0.3 ppm for toluene and xylene. Other corresponding substances such as methanol, ethanol, formaldehyde, acetaldehyde, ethylacetate, ammonia and trichloromethane had no or less interference. It is a simple and convenient sensor with good selectivity and sensitivity for detecting BTEX.

• Periodical: Advanced Materials Research (Volume 663)
• Pages: 335-342
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.663.335
• Online since: February 2013
• Authors: Ni Jing Wang, Xiao An Cao, Rui Wen He, Yong Hui Liu, Yi Jun Huang
• Keywords: BTEX, Cataluminescence, Catalytic Reduction, Gas Sensor, Nanosized Al₂O₃/Pt

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