studies of the cataluminescence of benzene homologues onnanosized γ–al2o3eu2o3 and the development of a gas sensorfor benzene homologue vapors研究苯同系物的cataluminescence onnanosizedγ-al2o3eu2o3和气体sensorfor苯同系物蒸汽的发展.pdf

Sensors 2006, 6, 1827-1836 sensors ISSN 1424-8220 © 2006 by MDPI /sensors Full Paper Studies of the Cataluminescence of Benzene Homologues on Nanosized γ–Al O /Eu O and the Development of a Gas Sensor 2 3 2 3 for Benzene Homologue Vapors Jieshan Lu, Xiaoan Cao *, Canying Pan, Lianfeng Yang, Guangbo Lai, Jianling Chen and Cuiqin Wu Environmental Science and Engineering Institute, Guangzhou University, 510006, Guangzhou, P. R. China; E-mails: jjss1027@ (Jieshan Lu), ahcan2000@163.com (Canying Pan), cayang@163.com (Lianfeng Yang), lgb2004gd@ (Guangbo Lai), cjl198409@126.com (Jianling Chen), cqwu@ (Cuiqin Wu) * Author to whom correspondence should be addressed. E-mail: caoxiaoan2003@ Received: 26 October 2006; in revised form: / Accepted: 19 December 2006 / Published: 26 December 2006 Abstract: The cataluminescence (CTL) of benzene and the benzene homologues toluene and xylene on nanosized γ–Al O doped with Eu O (γ–Al O /Eu O ) was studied and a 2 3 2 3 2 3 2 3 sensor of determining these gases was designed. The proposed sensor showed high sensitivity and selectivity at an optimal temperature of 432 ºC, a wavelength of 425 nm and a flow rate of 400 mL/min. Quantitative analysis was performed at the optimal conditions. The linear ranges of CTL intensity versus concentration of the benzene homologues were as follows: benzene 2.4~5000 mL/m3