Photoelectrocatalytic Degradation of Benzoquinone Using Different Cathode Materials

Abstract:

A photo-electro-chemical (PEC) catalytic reactor with double compartments was designed. Benzoquinone in cathodal compartment was degradated effectively using these different cathodes and the maximum percent degradation was 66.1% using TiO₂/Ti thin film cathode fired by 600°C. There was higher concentration of H₂O₂ and ·OH on TiO₂/Ti thin film electrode fired by 600°C than others. Under the optimum condition of constant current at 3.5 mA, initial solution pH at 5.42, reaction time at 60 min, accumulative concentration of H₂O₂ was 0.35mg·L^-1 and ·OH steady state concentration= 2.19×10^-14 mol·L^-1.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 86-89
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.86
• Online since: December 2012
• Authors: Xiao Long Zeng, Ming Yu Li, Lin Song, Bao Yan He
• Keywords: ·OH, Benzoquinone, H₂O₂, Photoelectrocatalysis, TiO₂

References

[1] Macedo L C, Zaia D A M, Moore G J, et al. Degradation of leather dye on TiO2: A study of applied experimental parameters on photoelectrocatalysis [J]. Journal of Photochemistry and Photobiology A: Chemistry, 2007, 185 (1): 86-93

DOI: 10.1016/j.jphotochem.2006.05.016

[2] Wang Hui, Yu Xiujuan, Sun Dezhi. Study on the degradation mechanism of phenol in a new electrochemical oxidation system [J]. Acta Scientiae Circumstantiae, 2005, 25 (7): 901-907

[3] Li M Y, Xiong L, Chen Y Y, et al. Studies on photo-electro-chemical catalytic degradation of acid scarlet 3R dye [J]. Science in China' Series B: Chem, 2005, 48 (4): 297-304

DOI: 10.1360/042004-69

[4] Waldner. G., Pourmodjib. M., Bauer. R., Neumann-Spallart. M.: Photoelectrocatalytic degradation of 4-chlorophenol and oxalic acid on titanium dioxide electrodes. Chemosphere, 2003, 50 (8), 989-998

DOI: 10.1016/s0045-6535(02)00612-4

[5] Zhang Yaoting, Bai Shiji, Zhang Wei. An Improved Method for Determination of Trace H2O2 in Water. Environ Health [J]. 2006, 23 (3): 258-261

[6] Ren X C, Shi Z F, Kong L R, et al. Salicylic acid as a molecular probe to determine hydroxyl free radicals in a TiO2 thin films photocatalytic system [J]. Acta Scientiae Circumstantiae, 2008, 28 (4): 705-709

[7] Paschoal. F., Pepping. G., Zanoni. M., Anderson. M. A. Photoelectrocatalytic Removal of Bromate Using Ti/TiO2 Coated as a Photocathode. Environ. Sci. Technol. 2009, 43 (19): 7496-7502

DOI: 10.1021/es803366d

[8] Song Lin, Wang Xinle, Zhang Xin, Li Mingyu, Diao Zenghui. Design and Photocatalytic Activity of a Novel Photo-electro-chemical Catalytic Reactor with Single/Double Compartment. Journal of Sichuan University (Engineering Science Edition), 2011, 43 (2): 183-187