title: A 1,2-propylene oxide sensor utilizing cataluminescence on CeO2 nanoparticles.
abstract: A simple and sensitive gas sensor was proposed for the determination of 1,2-propylene oxide (PO) based on its cataluminescence (CTL) by oxidation in the air on the surface of CeO2 nanoparticles. The luminescence characteristics and optimal conditions were investigated in detail. Under optimized conditions, the linear range of the CTL intensity versus the concentration of PO was 10-150 ppm, with a correlation coefficient (r) of 0.9974 and a limit of detection (S/N = 3) of 0.9 ppm. The relative standard deviation for 40 ppm PO was 1.2% (n = 7). There was no or only weak response to common foreign substances including acetone, formaldehyde, ethyl acetate, acetic acid, chloroform, propanol, carbon tetrachloride, ether and methanol. There was no significant change in the catalytic activity of the sensor for 100 h. The proposed method was simple and sensitive, with a potential of detecting PO in the environment and industry.
authors.affiliation: College of Chemistry and Chemical Engineering, Yan'an University, 716000, Yan'an, China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Liu
authors.forename: Yantu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yanzhong
authors.initials: Y
authors.lastname: Zhen
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ma
authors.forename: Weiwei
authors.initials: W
authors.lastname: Zuo
mesh_terms: D000388:Air; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D004852:Epoxy Compounds / Q000032:analysis*; D057230:Limit of Detection; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D004852:Epoxy Compounds; D002563:Cerium; C030583:ceric oxide; C009068:propylene oxide
keywords: 1,2-propylene oxide; CeO2 nanoparticles; cataluminescence; gas sensor