title: Spectroscopic investigations on the simulated solar light induced photodegradation of 4-nitrophenol by using three novel copper(II) porphyrin-TiO2 photocatalysts.
abstract: Three porphyrins containing different functional groups (-OH, C-O2C2H5, -COOH), 5-(4-hydroxy) phenyl-10,15,20-triphenyl porphyrin (1a), 5-(4-ethylacetatatomethoxy) phenyl-10,15,20-triphenyl porphyrin (1b), 5-(4-carboxylatomethoxy) phenyl-10,15,20-triphenyl porphyrin (1c), were synthesized and characterized spectroscopically. The CuPp(2a, 2b, 2c)-TiO2 photocatalysts were then prepared and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis-DRS), Fourier-transform infrared spectroscopy (FT-IR). The photocatalytic activities of the photocatalysts were investigated by carrying out the photodegradation of 4-nitrophenol in aqueous solution under simulated solar irradiation. It was found that the CuPp(2a, 2b, 2c)-TiO2 enhanced the photocatalytic efficiency of bare TiO2 in photodegrading the 4-NP due to the interaction between CuPp(2a, 2b, 2c) and TiO2, resulted in the enhancement of the photogenerated electron-hole separation. The reasons of this enhanced photocatalytic activity were also discussed. Based on the present study, it could be considered as a promising photocatalyst for the further industrial application.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710069, People's Republic of China.
authors.forename: Xiang-fei
authors.initials: XF
authors.lastname: Lü
authors.forename: Wan-jun
authors.initials: WJ
authors.lastname: Sun
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Wei-xia
authors.initials: WX
authors.lastname: Xu
authors.forename: Feng-xing
authors.initials: FX
authors.lastname: Zhang
mesh_terms: D002384:Catalysis / Q000528:radiation effects; D049449:Luminescence; D008665:Metalloporphyrins / Q000138:chemical synthesis* / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D009596:Nitrophenols / Q000737:chemistry / Q000528:radiation effects*; D056951:Photoelectron Spectroscopy; D010782:Photolysis / Q000528:radiation effects*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013472:Sunlight; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D008665:Metalloporphyrins; D009596:Nitrophenols; C009495:titanium dioxide; D014025:Titanium; C024836:4-nitrophenol