title: Characterization and evaluation of the efficiency of SiO2/tetra-α-(2,4-di-tert-butylphenoxy)-phthalocyaninato zinc nanocomposite as photosensitizers for oxidation of 2,4,6-trichlorophenol.
abstract: A photosensitizer tetra-α-(2,4-di-tert-butylphenoxy)-phthalocyaninato zinc [ZnPc(OAr)4] was successfully encapsulated in SiO2 nanoparticle by the microemulsion method. The photosensitized composite nanoparticle was able to degrade 2,4,6-trichlorophenol (TCP) in aqueous solution. Under visible light irradiation, the nanoparticles efficiently generated reactive oxygen species; 95.4% of TCP was degraded after 270 min of reaction. Some aromatic compounds and aliphatic carboxylic acids were detected by mass spectrometry as the reaction intermediates. The results were different from those of previously reported photocatalytic reactions, in which valence band holes or hydroxyl radicals functioned as the main oxidants. The photosensitizing composite nanoparticle is potentially applicable to the oxidation of phenol.
authors.affiliation: a Cancer Metastasis Alert and Prevention Center, College of Chemistry , Fuzhou University , Fuzhou , People's Republic of China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Jiang
authors.forename: Tingting
authors.initials: T
authors.lastname: Yang
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
mesh_terms: D002733:Chlorophenols / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D008027:Light; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D010084:Oxidation-Reduction / Q000528:radiation effects; D010777:Photochemistry / Q000379:methods; D017319:Photosensitizing Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D012822:Silicon Dioxide / Q000737:chemistry* / Q000528:radiation effects; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*; D017967:Zinc Compounds / Q000737:chemistry / Q000528:radiation effects
chemical_list: D002733:Chlorophenols; D017319:Photosensitizing Agents; D014874:Water Pollutants, Chemical; D017967:Zinc Compounds; D012822:Silicon Dioxide; C024564:2,4,6-trichlorophenol
keywords: 2,4,6-trichlorophenol; SiO2 nanoparticle; tetra-α-(2;4-di-tert-butylphenoxy)-phthalocyaninato zinc