title: Developing polyetherimide/graphitic carbon nitride floating photocatalyst with good photodegradation performance of methyl orange under light irradiation.
abstract: Polyetherimide-graphitic carbon nitride (PEI-g-C3N4) floating photocatalyst has been synthesized by using polyetherimide (PEI) as linker to bind graphitic carbon nitride (g-C3N4) together. XRD and XPS analysis for PEI-g-C3N4show that the interaction between PEI and g-C3N4does not disturb the structure of g-C3N4. FTIR, TEM and theoretical results suggest that the long chain PEI binds g-C3N4particles together to form PEI-g-C3N4via hydrogen bonding interaction. Based on photodegradation results of methyl orange (MO), PEI can not photodegrade MO and just works as linker in PEI-g-C3N4, while the photodegradation performance of PEI-g-C3N4is from the contribution of g-C3N4. Total organic carbon (TOC) analysis show that nearly 47% organic carbon has been converted into inorganic carbon after photodegradation, suggesting that PEI-g-C3N4can destroy both NN bond and aromatic rings in MO under light irradiation. The photodegradation efficiency (91%) of MO by g-C3N4is higher than that (80%) by PEI-g-C3N4with stirring. But, the photodegradation efficiency (37%) of MO by g-C3N4is lower than that (55%) by PEI-g-C3N4without stirring. This is the advantage of floating photocatalyst with respect to the powder photocatalyst since the former can utilize more solar energy than the latter when stirring is not available.
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, College of Environment, Hohai University, PR China. Electronic address: guoyong@hhu.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, College of Environment, Hohai University, PR China.
authors.forename: Ruxia
authors.initials: R
authors.lastname: Wang
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, College of Environment, Hohai University, PR China. Electronic address: pfwang2005@hhu.edu.cn.
authors.forename: Peifang
authors.initials: P
authors.lastname: Wang
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, College of Environment, Hohai University, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education, College of Environment, Hohai University, PR China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry / Q000528:radiation effects*; D002384:Catalysis; D004785:Environmental Pollutants / Q000528:radiation effects*; D006108:Graphite / Q000737:chemistry*; D008027:Light; D009570:Nitriles / Q000737:chemistry*; D055668:Photochemical Processes / Q000528:radiation effects; D010782:Photolysis / Q000528:radiation effects*; D011108:Polymers / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004785:Environmental Pollutants; D009570:Nitriles; D011108:Polymers; C433673:polyetherimide; C011206:cyanogen; C100258:methyl orange; D006108:Graphite
keywords: Floating photocatalyst; Graphitic carbon nitride; Polyetherimide; TOC; Table lamp