title: Oxidation of crosslinked chitosan-epichlorohydrine film and its application with TiO2 for phenol removal.
abstract: Photocatalytic oxidation of crosslinked chitosan-epichlorohydrin (CS-ECH) film was successfully achieved via an immobilized TiO2/CS-ECH photocatalyst system on a glass plate. Oxidation process of CS-ECH film was carried out by irradiating the system with a 45-W fluorescent lamp for 10h in ultra-pure water. The results indicate the formation of carbonyl functional groups and partial elimination of amine groups in the molecular structure of the oxidized CS-ECH film. This oxidized CS-ECH film has different optical properties, ionic conductivity, degree of transparency, swelling index and chemical stability than the fresh CS-ECH film. In the environmental applications, the TiO2/oxidized-CS-ECH photocatalyst system can have photodegradation and faster mineralization rate of phenol than both fresh TiO2/CS-ECH and TiO2/oxidized-CS photocatalyst systems. This simple photocatalyst system, therefore can be considered as an environmental friendly method to oxidize synthetic biopolymer and to improve the photocatalytic efficiency of TiO2 to treat wastewater.
authors.affiliation: School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Penang, Malaysia.
authors.forename: Ali H
authors.initials: AH
authors.lastname: Jawad
authors.forename: M A
authors.initials: MA
authors.lastname: Nawi
mesh_terms: D002384:Catalysis; D048271:Chitosan / Q000031:analogs & derivatives* / Q000737:chemistry; D004811:Epichlorohydrin / Q000031:analogs & derivatives* / Q000737:chemistry; D010084:Oxidation-Reduction; D019800:Phenol / Q000302:isolation & purification*; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D048271:Chitosan; D004811:Epichlorohydrin; D019800:Phenol; D014025:Titanium; D062065:Wastewater; D014874:Water Pollutants, Chemical; C009495:titanium dioxide