Photocatalytic Degradation of CH3Cl over a Nickel-Loaded Layered Perovskite

• Published in: Industrial & engineering chemistry research Vol. 42; no. 6; pp. 1184 - 1189
• Main Authors: Hwang, Dong Won, Cha, Kyung Yong, Kim, Jindo, Kim, Hyun Gyu, Bae, Sang Won, Lee, Jae Sung
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 19.03.2003
• Subjects: Applied sciences; Atmospheric pollution; Chemistry; Exact sciences and technology; General and physical chemistry; General processes of purification and dust removal; Photochemistry; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Pollution; Prevention and purification methods; Methyl chloride; Perovskite type compound; Nickel Oxides; Conversion rate; Transition metal Compounds; Photocatalysis; Lanthanum Oxides; Volatile organic compound; Experimental study; Fabrication property relation; Titanium Oxides; Characterization; Ultraviolet radiation; Chlorine Organic compounds; Chlorocarbon; Physicochemical purification; Oxidation; Lanthanide Compounds; Kinetics; Surface area; Catalyst activity; Flue gas purification; Photochemical degradation; Crystalline structure
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/ie020457c

A highly donor-doped (110) layered perovskite, La2Ti2O7, was found to be an efficient photocatalyst comparable to TiO2 P25 and better than K2La2Ti3O10, the latter being an undoped (100) layered perovskite, in oxidative degradation of CH3Cl in the gas phase under UV irradiation. The activity depended on the crystallinity and the surface area of perovskite oxide. The grinding methods of the mixed oxide precursors before sintering as well as the sintering temperature affected the crystallinity and the surface area of the formed perovskite. Loading of Ni to perovskite materials increased the photocatalytic activity in degradation of CH3Cl markedly by constructing a p−n junction between nickel oxide and perovskite material. The optimum nickel loading was dependent strongly on the sintering temperature and the surface area of the perovskite material, and a slight deviation from the optimal nickel loading caused a drastic decrease in the photocatalytic activity.