Abstract
A new type of photo-electro-chemical catalytic reactor was designed. Cathode and anode of the new reactor were made of high-purity graphite and titanium dioxide electrode respectively. A saturated calomel electrode (SCE) was used as the reference electrode. Under the condition of ultraviolet radiation and anodic bias-voltage, acid scarlet 3R was degraded by the process of photoelectrocatalysis with titanium dioxide electrode in anodic compartment, while it was degraded by electrogenerated Fenton’s reagent and hydrogen peroxide through reducing dissolved oxygen with graphite electrode in catholyte. The new reactor made the best use of photogenerated holes and photogenerated charge on the anode of the new reactor, which achieved the purpose of degrading acid scarlet 3R in the cathodic and anodic compartments simultaneously, i.e. “two electrodes and double effect”. The experimental results showed that, compared with other photoelectrocatalysis reactors (“two electrodes and single effect” reactor), the new reactor has obviously enhanced the degradation of acid scarlet 3R dye. With the concentration of the dye being 30 mg · L−1 in water, under the operating conditions that when the inert supporting electrolyte concentration was 0.02 mol · L−1 sodium sulfate, initial solution pH = 3, and cathodic potential −E c = 0.66 V, the highest decolorizing efficiency of 92% was accomplished in cathodic compartment, and that of 60% in anodic compartment.
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References
Negishi, N., Takeuchi, K., Preparation of photocatalytic TiO2 transparent thin film by thermal decomposition of Ti-alkoxide with α-terpineol as a solvent, Thin Solid Films, 2001, 392(2): 249–253.
Tong, S. F., Peng, C. F., Tang, Y. et al., Preparation of TiO2 photocatalytic thin film using reformative sol-gel method, Chemical Journal on Internet, 2004, 6(2): 10.
Hitchman, M. L., Tian, F., Studies of TiO2 thin films prepared by chemical vapour deposition for photocatalytic and photoelectro-catalytic degradation of 4-chlorophenol, Electroanalytical Chem., 2002, 538–539: 165–172.
Zanoni, M. V. B., Sene, J. J., Anderson, M. A., Photoelectrocatalytic degradation of remazol brilliant orange 3R on titanium dioxide thin-film electrodes, Photochem. Photobiol. A: Chem., 2003, 157: 55–63.
Leng, W. H., Zhang, Z., Zhang, J. Q., Photoelectrocatalytic degradation of aniline over rutile TiO2/Ti electrode thermally formed at 600°C, Mol. Catal. A: Chem., 2003, 206: 239–252.
Brillas, E., Casado, J., Aniline degradation by electro-Fenton and peroxi-coagulation processes using a flow reactor for wastewater treatment, Chemosphere, 2002, 47: 241–248.
Waldner, G., Pourmodjib, M., Bauer, R. et al., Photoelectrocatalytic degradation of 4-chlorophenol and oxalic acid on titanium dioxide electrodes, Chemosphere, 2003, 50: 989–998.
Liu, H., Leng, W. H., Wu, H. et al., Study of photoelectrocatalytic degradation of sulfosalicylic acid, J. Catal. (in Chinese), 2000, 21(3): 209–212.
Beijing Normal University, Inorganic Chemistry, Beijing: Demotic Educational Publishing Company, 1982, 1054–1061.
Fu, X. C., Chen, R. H., Physical Chemistry, Beijing: Higher Educational Publishing Company, 1984, 131.
Tang, W. Z., Huang, C. P., 2,4-Dichlorophenol oxidation kinetics by Fenton’s reagent, Environ. Technol., 1996, 17(12): 1371–1378.
Kiwi, J., Pulgrin, C., Peringer, P., Effect of Fenton and photo-Fenton reactions on the degradation biodegradability of 2-and 4-nitrophenols in water treatment, J. Appl. Catal. B. Environ., 1994, 8: 335–350.
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Li, M., Xiong, L., Chen, Y. et al. Studies on photo-electro-chemical catalytic degradation of acid scarlet 3R dye. Sc. China Ser. B-Chem. 48, 297–304 (2005). https://doi.org/10.1360/042004-69
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DOI: https://doi.org/10.1360/042004-69