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Received June 29, 2011
Accepted February 8, 2012
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Electrochemical degradation of phenol on the La and Ru doped Ti/SnO2-Sb electrodes
1School of Chemistry & Chemical Engineering, Southeast University, Nanjing 211189, China 2Key Laboratory for Attapulgite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huaian 223003, China 3State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, China
sun@seu.edu.cn
Korean Journal of Chemical Engineering, September 2012, 29(9), 1178-1186(9)
https://doi.org/10.1007/s11814-012-0014-3
https://doi.org/10.1007/s11814-012-0014-3
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Abstract
La and Ru doped Ti/SnO2-Sb electrodes were prepared by thermal decomposition and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It confirmed that the surface of the La and Ru doped Ti/SnO2-Sb electrodes presents a certain microspherical structure formed by aggregates of nanoparticles, which increases the specific area greatly and provides more active sites. The enhanced performance of the La and Ru doped electrodes arose from the increased adsorption capacity of hydroxyl radicals. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed an improvement of the electrochemical capacity for the La and Ru doped Ti/SnO2-Sb electrodes. The electrochemical oxidation performance of the prepared_x000D_
electrode was further studied using phenol as a model pollutant. UV scans revealed that both phenol and its intermediate products are more rapidly decomposed, especially in the early stage of oxidation on the La and Ru doped electrodes. The removals of chemical oxygen demand (COD) were 86.4% and 82.1% on the Ti/SnO2-Sb-La and Ti/SnO2-Sb-Ru electrodes, respectively, which were higher than that on the SnO2-Sb/Ti electrode (60.1%). The doped electrodes are demonstrated to have superior electrochemical oxidation ability for phenol.
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Canizares P, Dominguez JA, Rodrigo MA, Villasenor J, Rodriguez J, Ind. Eng. Chem. Res., 38(10), 3779 (1999)
Xiong Y, He C, Karlsson HT, Zhu XH, Chemosphere., 50, 131 (2003)
Simond O, Comninellis C, Electrochim. Acta, 42(13-14), 2013 (1997)
Ma HC, Liu CP, Liao JH, Su Y, Xue XZ, Xing W, J. Mol. Catal. A-Chem., 247(1-2), 7 (2006)
Vukovic M, Marijan D, Cukman D, Pervan P, Milun M, J. Mater. Sci., 34(4), 869 (1999)
Comninellis C, Vercesi GP, J. Appl. Electrochem., 21, 335 (1991)
Duverneuil P, Maury F, Pebere N, Senocq F, Vergnes H, Surf.Coat. Technol., 151-152, 9 (2002)
Zanta CLPS, Michaud PA, Comninellis C, De Andrade AR, Boodts JFC, J. Appl. Electrochem., 33(12), 1211 (2003)
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Brito GES, Pulcinelli SH, Santilli CV, J. Mater. Sci., 31(15), 4087 (1996)
Correalozano B, Comninellis C, Debattisti A, J. Electrochem. Soc., 143(1), 203 (1996)
Trost BM, Chan C, Ruhter G, J. Am. Chem. Soc., 109, 3486 (1987)
Srinivas K, Vithal M, Sreedhar B, Raja MM, Reddy PV, J.Phys. Chem. C., 113, 3543 (2009)
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Mousty C, Foti G, Comninellis C, Reid V, Electrochim. Acta, 45(3), 451 (1999)
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Karunakaran C, Gomathisankar P, Manikandan G, Korean J. Chem. Eng., 28(5), 1214 (2011)
Ye ZG, Meng HM, Chen D, Yu HY, Huan ZS, Wang XD, Sun DB, Solid State Sci., 10, 346 (2008)
Zhu XP, Shi SY, Wei JJ, Lv FX, Zhao HZ, Kong JT, He Q, Ni JN, Environ. Sci. Technol., 41, 6541 (2007)
Chailapakul O, Popa E, Tai H, Tai BV, Tryk DK, Electrochem. Commun., 2, 422 (2000)
Jung HJ, Hong JS, Suh JK, Korean J. Chem. Eng., 28(9), 1882 (2011)
Fierro S, Nagel T, Baltruschat H, Comninellis C, Electrochem.Commun., 9, 1969 (2007)
