Photoelectrochemical activity of liquid phase deposited TiO2 film for degradation of benzotriazole.
TiO(2) film deposited on glassy carbon electrode surface was prepared via the liquid phase deposition (LPD). The deposited TiO(2) film before and after calcination was characterized with scanning electron microscopy (SEM) and X-ray diffraction (XRD). Based on the high photoelectrochemical activity of calcined LPD TiO(2) film, the photoelectrocatalytic degradation of benzotriazole (BTA) was investigated. Compared with the electrochemical oxidation process, direct photolysis or photocatalysis for treatment of BTA, a synergetic photoelectrocatalytic degradation effect was observed using the LPD TiO(2) film-coated electrode. Various factors influencing the photoelectrocatalytic degradation of BTA such as film calcination, applied bias potential, pH value, supporting electrolyte concentration and initial concentration of BTA were investigated. The COD removal for BTA solution was analyzed to evaluate the mineralization of the PEC process. Based on the degradation experimental results, a possible photoelectrocatalytic degradation mechanism for BTA was proposed.
Ding
Yaobin
Y
College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, PR China.
Yang
Changzhu
C
Zhu
Lihua
L
Zhang
Jingdong
J
D002384:Catalysis; D004563:Electrochemistry / Q000379:methods*; D004573:Electrolytes; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008956:Models, Chemical; D010100:Oxygen / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D014230:Triazoles / Q000032:analysis / Q000737:chemistry*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction / Q000379:methods
D004573:Electrolytes; D014230:Triazoles; C009495:titanium dioxide; C012771:benzotriazole; D014025:Titanium; D010100:Oxygen