title: Improvement of phenol photodegradation efficiency by a combined g-C3N4/Fe(III)/persulfate system.
abstract: Graphite-like C3N4 (g-C3N4) is an efficient visible-light-driven photocatalyst commonly used in dye decolorization with very poor photocatalytic efficiency for degrading recalcitrant organic pollutants, such as phenol. In this study, we designed a g-C3N4/Fe(III)/persulfate system to significantly improve the phenol photodegradation efficacy by combining photocatalysis and light Fenton interaction. The phenol removal ratio and degradation rate of the g-C3N4/Fe(III)/persulfate system are 16.5- and 240-fold higher than those of individual g-C3N4 system. Sulfate radicals [Formula: see text] and H2O2 are detected in the g-C3N4/Fe(III)/persulfate system, suggesting that both radical decomposition and light Fenton interaction play important roles in phenol degradation. The efficient coupled photocatalytic system of g-C3N4 combined with Fe(III) and persulfate shows significant potential for application in large-scale degradation of environmental pollutants.
authors.affiliation: CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Jian-Yang
authors.initials: JY
authors.lastname: Hu
authors.affiliation: CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Tian
authors.affiliation: CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address: jhong@ustc.edu.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
mesh_terms: D002384:Catalysis; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D008027:Light; D009570:Nitriles / Q000737:chemistry*; D010636:Phenols / Q000032:analysis* / Q000528:radiation effects; D010782:Photolysis; D017680:Potassium Compounds / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000528:radiation effects; D018508:Water Purification
chemical_list: C045076:Fenton's reagent; D005290:Ferric Compounds; D009570:Nitriles; D010636:Phenols; D017680:Potassium Compounds; D013431:Sulfates; D014874:Water Pollutants, Chemical; C011206:cyanogen; C009007:potassium persulfate; D006861:Hydrogen Peroxide; D007501:Iron
keywords: Fenton; Persulfate; Phenol degradation; Photocatalyst; g-C(3)N(4)