CeO2 mediated photocatalytic degradation studies of C.I. acid orange 7.
CeO2 nanoparticles were prepared by a simple precipitation method, followed by calcination treatment. By selecting photocatalytic degradation of acid orange 7 (AO7) as a probe reaction, the influences of calcination temperature of catalyst, the concentration of AO7, initial pH value of AO7 solution and catalyst dosage on the photocatalytic activity of CeO2 were studied. It was found that CeO2 calcined at 550 degrees C shows the highest photocatalytic activity under visible light irradiation. It was revealed that under visible light irradiation the degradation of AO7 over CeO2 nanoparticles follows a dye self-sensitization mechanism. The degradation rate of AO7 increases with decrease in the initial pH value of the reaction solution, and degradation efficiency decreases with increase in the initial dye concentration. The optimal dosage of CeO2 in solution for AO7 degradation is 1 g/L.
Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, PR China.
Pengfei
P
Ji
Baozhu
B
Tian
Feng
F
Chen
Jinlong
J
Zhang
D001391:Azo Compounds / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects*; D001557:Benzenesulfonates / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects*; D002384:Catalysis; D002586:Cesium / Q000737:chemistry* / Q000528:radiation effects*; D008027:Light; D010087:Oxides / Q000737:chemistry / Q000528:radiation effects; D010777:Photochemistry / Q000379:methods; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods*
D001391:Azo Compounds; D001557:Benzenesulfonates; D010087:Oxides; D014874:Water Pollutants, Chemical; D014867:Water; D002586:Cesium; C014722:2-naphthol orange