title: Synthesis, property characterization and photocatalytic activity of the novel composite polymer polyaniline/Bi2SnTiO7.
abstract: A novel polyaniline/Bi(2)SnTiO(7 )composite polymer was synthesized by chemical oxidation in-situ polymerization method and sol-gel method for the first time. The structural properties of novel polyaniline/Bi(2)SnTiO(7) have been characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray spectrometry. The lattice parameter of Bi(2)SnTiO(7) was found to be a = 10.52582(8) Å. The photocatalytic degradation of methylene blue was realized under visible light irradiation with the novel polyaniline/Bi(2)SnTiO(7) as catalyst. The results showed that novel polyaniline/Bi(2)SnTiO(7 )possessed higher catalytic activity compared with Bi(2)InTaO(7) or pure TiO(2) or N-doped TiO(2) for photocatalytic degradation of methylene blue under visible light irradiation. The photocatalytic degradation of methylene blue with the novel polyaniline/Bi(2)SnTiO(7) or N-doped TiO(2) as catalyst followed first-order reaction kinetics, and the first-order rate constant was 0.01504 or 0.00333 min(-1). After visible light irradiation for 220 minutes with novel polyaniline/Bi(2)SnTiO(7 )as catalyst, complete removal and mineralization of methylene blue was observed. The reduction of the total organic carbon, the formation of inorganic products, SO(4)2- and NO(3-), and the evolution of CO(2) revealed the continuous mineralization of methylene blue during the photocatalytic process. The possible photocatalytic degradation pathway of methylene blue was obtained under visible light irradiation.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China. yyj@boyone.net
authors.forename: Yunjun
authors.initials: Y
authors.lastname: Yang
authors.forename: Jingfei
authors.initials: J
authors.lastname: Luan
mesh_terms: D000814:Aniline Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007700:Kinetics; D008027:Light; D008751:Methylene Blue / Q000737:chemistry / Q000528:radiation effects; D008956:Models, Chemical; D009566:Nitrates / Q000737:chemistry; D010782:Photolysis; D033362:Powder Diffraction; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D056831:Coordination Complexes; D009566:Nitrates; D000644:Quaternary Ammonium Compounds; D013431:Sulfates; C416807:polyaniline; C009495:titanium dioxide; D014025:Titanium; D008751:Methylene Blue