Photocatalytic Degradation of Acridine Orange over NaBiO3 Driven by Visible Light Irradiation

Catalysts

Chung-Shin Lu³  Chiing-Chang Chen¹  Ling-Kuen Huang³  Peir-An Tsai² 

[1] Department of Science Application and Dissemination, National Taichung University of Education, Taichung 403, Taiwan; E-Mail:;General Education Center, Jen-Teh Junior College of Medicine, Nursing and Management, Houlong, Miaoli County 356, Taiwan; E-Mail:;Department of General Education, National Taichung University of Science and Technology, Taichung 403, Taiwan; E-Mail:

关键词: NaBiO₃;    photocatalysis;    acridine orange;    dye;    N-de-methylation;    pathway;   

DOI  :  10.3390/catal3020501

来源: mdpi

【 摘 要 】

The photocatalytic degradation of acridine orange (AO) dye by NaBiO₃ photocatalyst under visible light irradiation was investigated systematically. The NaBiO₃ photocatalyst exhibited a higher photocatalytic activity compared to the P25 photocatalyst. After 160 min of photocatalytic reaction, the degradation rate of AO could reach to 99% in appropriate conditions. Factors, such as catalyst dosage, solution pH, initial AO concentration and the presence of anions, were found to influence the degradation rate. To scrutinize the mechanistic details of the dye photodegradation, the intermediates of the processes were separated, identified and characterized by the HPLC-ESI-MS technique. The analytical results indicated that the N-de-methylation degradation of AO dye took place in a stepwise manner to yield mono-, di-, tri- and tetra-N-de-methylated AO species generated during the processes. The probable photodegradation pathways were proposed and discussed.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.