Abstract: SnO2/Fe3O4 particle electrodes with good magnetic properties were prepared by a hydrothermal method. The morphology, crystal phase composition and magnetic properties of the electrodes were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and hysteresis testing, respectively. The electrocatalytic property was investigated by cyclic voltammetry, and the electrochemical degradation of artificial Rhodamine B (RhB) waste water was conducted in a multi-electrode reactor. Results showed that the catalytic layer of the as-prepared particle electrode had stable load and good conduction, and was easy to recycle and reuse, which benefit the electrocatalytic reaction. The multi-electrode system was far better at degrading RhB than a two-dimensional electrode system, as the former′s removal rate of RhB and total organic carbon (TOC) were 100% and 83%, respectively. In the reaction,·OH is the main active radical for the degradation of organic compounds. Moreover, the removal rate of RhB and total organic carbon (TOC) maintained above 93% and 77%, respectively, after the particle electrode were reused 5 times, exhibiting an excellent and stable electrocatalytic performance.
1 Jain R, Mathur M, Sikarwar S, et al. Removal of the hazardous dye rhodamine through photocatalytic and adsorption treatments[J].Environ Manage,2007,85(4):956. 2 Kuo W G. Decolorizing dye wastewater with Fenton′s reagent[J].Water Res,1992,26(7):881. 3 Vlyssides A G, Loizidou M, Karlis P K, et al. Electrochemical oxidation of a textile dye wastewater using a Pt/Ti electrode[J].J Ha-zard Mater,1999,70(1):41. 4 Fockedey E, Van Lierde A. Coupling of anodic and cathodic reactions for phenol electro-oxidation using three-dimensional electrodes[J]. Water Res,2002,36(16):4169. 5 Xiong Y A, Strunk P J, Xia H, et al. Treatment of dye wastewater containing acid orange Ⅱ using a cell with three-phase three-dimensional electrode[J]. Water Res,2001,35(17):4226. 6 Kai H, Ishibashi Y, Mori T, et al. Decolorization and estrogenic activity of colored livestock wastewater after electrolysis treatment[J]. J Mater Cycles Waste Manage,2010,12(2):128. 7 Jiang Bo, Zheng Jingtang, Qiu Shi, et al. Review on electrical discharge plasma technology for wastewater remediation[J]. Chem Eng J,2014,236:348. 8 Zhang Chao, Jiang Yonghai,Li Yunlin, et al. Three-dimensional electrochemical process for wastewater treatment: A general review[J]. Chem Eng J,2013,228:455. 9 Qin Yinghua, Sun Meng, Liu Huijuan, et al. AuPd/Fe3O4-based three-dimensional electrochemical system for efficiently catalytic degradation of 1-butyl-3-methylimidazolium hexafluorophosphate[J]. Electrochim Acta,2015,186:328. 10 Xuan S, Hao L, Jiang W, et al. A facile method to fabricate carbon-encapsulated Fe3O4 core/shell composites[J]. Nanotechnology,2007,18(3):035602. 11 Wang Z, Xiao P, He N. Synthesis and characteristics of carbon encapsulated magnetic nanoparticles produced by a hydrothermal reaction[J]. Carbon,2006,44(15):3277. 12 Lei Y, Chen C S, Tu Y J, et al. Heterogeneous degradation of organic pollutants by persulfate activated by CuO-Fe3O4: Mechanism, stability, and effects of pH and bicarbonate ions[J]. Environ Sci Technol,2015,49(11):6838. 13 Xu L, Wang J. Magnetic nanoscaled Fe3O4/CeO2 composite as an efficient Fenton-like heterogeneous catalyst for degradation of 4-chlorophenol[J]. EnvironL Sci Technol,2012,46(18):10145. 14 Ai Z, Xiao H, Mei T, et al. Electro-Fenton degradation of rhodamine B based on a composite cathode of Cu2O nanocubes and carbon nanotubes[J]. Phys Chem C,2008,112(31):11929. 15 Liu W, Ai Z, Zhang L. Design of a neutral three-dimensional electro-Fenton system with foam nickel as particle electrodes for wastewater treatment[J]. J Hazard Mater,2012,243:257. 16 Rees N V, Zhou Yi-Ge, Compton R G. Making contact: Charge transfer during particle-electrode collisions[J]. Rsc Adv,2012,2(2):379. 17 Martinez-Huitle C A, Ferro S. Electrochemical oxidation of organic pollutants for the wastewater treatment: Direct and indirect processes[J]. Chem Soc Rev,2006,35(12):1324. 18 Zhang Jiaming, Ma Chunyuan, Sun Youmin, et al. Hydroxyl radical reactions with 2-chlorophenol as a model for oxidation in supercritical water[J]. Res Chem Intermed,2014,40(3):973. 19 Luo M, Yuan S, Tong M, et al. An integrated catalyst of Pd supported on magnetic Fe3O4 nanoparticles: Simultaneous production of H2O2 and Fe2+ for efficient electro-Fenton degradation of organic contaminants[J]. Water Res,2014,48:190. 20 Rusevova K, Kopinke F D, Georgi A. Nano-sized magnetic iron oxi-des as catalysts for heterogeneous Fenton-like reactions-Influence of Fe (2)/Fe (3) ratio on catalytic performance[J].J Hazard Mater,2012,241:433. 21 Ding H, Feng Y, Liu J. Preparation and properties of Ti/SnO2-Sb2O5 electrodes by electrodeposition[J]. Mater Lett,2007,61(27):4920. 22 Wang B, Kong W, Ma H. Electrochemical treatment of paper mill wastewater using three-dimensional electrodes with Ti/Co/SnO2-Sb2O5 anode[J].J Hazard Mater,2007,146(1):295. 23 Feng Y, Cui Y, Logan B, et al. Performance of Gd-doped Ti-based Sb-SnO2 anodes for electrochemical destruction of phenol[J].Chemo-sphere,2008,70(9):1629. 24 Meng L R, Chen W, Tan Y, et al. Fe3O4 octahedral colloidal crystals[J]. Nano Res,2011,4(4):370. 25 Paek S M, Yoo E J, Honma I. Enhanced cyclic performance and lithium storage capacity of SnO2/graphene nanoporous electrodes with three-dimensionally delaminated flexible structure[J]. Nano Lett,2008,9(1):72. 26 Park M S, Wang G X, Kang Y M, et al. Preparation and electrochemical properties of SnO2 Nanowires for application inlithium-ion batteries[J]. Angew Chem,2007,119(5):764.
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2017, Vol. 31 
