title: Fabrication of a Ag/Bi3TaO7 Plasmonic Photocatalyst with Enhanced Photocatalytic Activity for Degradation of Tetracycline.
abstract: A novel Ag/Bi3TaO7 plasmonic photocatalyst has been prepared by a simple photoreduction process. The as-prepared Ag/Bi3TaO7 photocatalyst exhibited an enhanced photocatalytic activity for the degradation of tetracycline (TC) compared to that of a bare Bi3TaO7 catalyst. The 1 wt % Ag-loaded Bi3TaO7 sample showed the highest photocatalytic efficiency for TC degradation (85.42%) compared with those of the other samples. The enhanced photocatalytic activity could be ascribed to the synergistic effect of the surface plasmon resonance caused by Ag nanoparticles. Electrochemical impedance spectroscopy demonstrated that the incorporation of silver nanoparticles onto the Bi3TaO7 surface promoted the separation of photogenerated carriers. In addition, an electron spin resonance (ESR) and trapping experiment revealed that the photoinduced active species hydroxyl radical and superoxide radical were the main active species in the photocatalytic process of TC degradation. The photocatalytic reaction mechanism was discussed by active species trapping and ESR analysis.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Bifu
authors.initials: B
authors.lastname: Luo
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Dongbo
authors.initials: D
authors.lastname: Xu
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Di
authors.initials: D
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Guoling
authors.initials: G
authors.lastname: Wu
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Wu
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Shi
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D058266:Dielectric Spectroscopy; D004578:Electron Spin Resonance Spectroscopy; D007700:Kinetics; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance; D013635:Tantalum / Q000737:chemistry*; D013752:Tetracycline / Q000032:analysis / Q000737:chemistry*
chemical_list: D012834:Silver; D013635:Tantalum; D013752:Tetracycline; D001729:Bismuth
keywords: Ag; SPR; bismuth tantalate; nanocomposite; photocatalysis; tetracycline