title: Electrochemical-assisted photodegradation of dye on TiO2 thin films: investigation on the effect of operational parameters.
abstract: Electrochemical-assisted photodegradation of methyl orange has been investigated using TiO2 thin films. The films were prepared by sol-gel dip-coating method. Several operational parameters to achieve optimum efficiency of this electrochemical-assisted photodegradation system have been tested. Photoelectrochemical degradation was studied using different light sources and light intensity. The light sources chosen ranged from ultraviolet to visible light. The effect of agitation of the solution at different speeds has also been studied. Slight improvement of photodegradation rate was observed by applying higher agitation speed. Investigation on the electrode after repeated usages show the electrode can be reused up to 20 times with percentage of deficiency less than 15%. The study on the effect of solution temperature indicated that the activation energy of the methyl orange degradation is 18.63 kJ mol(-1).
authors.affiliation: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia. zulkar@fsas.upm.edu.my
authors.forename: Zulkarnain
authors.initials: Z
authors.lastname: Zainal
authors.forename: Chong Yong
authors.initials: CY
authors.lastname: Lee
authors.forename: Mohd Zobir
authors.initials: MZ
authors.lastname: Hussein
authors.forename: Anuar
authors.initials: A
authors.lastname: Kassim
authors.forename: Nor Azah
authors.initials: NA
authors.lastname: Yusof
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D004563:Electrochemistry; D007202:Indicators and Reagents / Q000737:chemistry*; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014872:Water Movements; D018508:Water Purification / Q000379:methods*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D007202:Indicators and Reagents; C009495:titanium dioxide; C100258:methyl orange; D014025:Titanium