全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电化学  2014 

β-PbO2/Sb-SnO2/Ti电极的苯酚电催化性能研究

DOI: 10.13208/j.electrochem.131021, PP. 493-498

Keywords: Sb-SnO2中间层,&beta,-PbO2/Ti,极化特性,电流效率,加速寿命测试

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用刷涂热解和电镀制得了β-PbO2/Sb-SnO2/Ti电极.采用X射线衍射(X-rayDiffraction,XRD)和扫描电镜(ScanningElectronMicroscope,SEM)进行分析与观察,Sb-SnO2中间层抑制PbF2的生成,NaF促进二氧化铅晶粒的成型与分散,消除了β-PbO2聚团.据谢乐公式(Scherrer)计算晶粒尺寸为25.2nm,电极表面结晶度高达100%.极化测试显示,β-PbO2/Sb-SnO2/Ti电极扩散段电位区、析氧电位和Tafel斜率分别为1.85~2.15V、2.08V和0.84,优于β-PbO2/Ti电极的1.40~1.80V、1.75V和0.36.使用β-PbO2/Sb-SnO2/Ti、β-PbO2/Ti电极在9mA·cm-2电流密度对苯酚模拟废水处理240min,前者COD(ChemicalOxygenDemand)去除率、电流效率(InstantCurrentEfficiency)高达90.1%和63.28%,优于后者66.9%和44.96%.寿命测试表明,β-PbO2/Sb-SnO2/Ti电极与β-PbO2/Ti电极相比延长10倍,工业寿命可达8.6a,有较高的工程应用价值.

References

[1]  Lin H, Niu J F, Ding S Y, et al. Electrochemical degradation of perfluorooctanoic acid (PFOA) by Ti/SnO2-Sb, Ti/SnO2-Sb/PbO2 and Ti/SnO2-Sb/MnO2[J]. Water Research, 2012, 46(7): 2281-2289.
[2]  Devillers D, Mahé E. Modified titanium electrodes: Application to Ti/TiO2/PbO2 dimensionally stable anodes[J]. Electrochimica Acta, 2010, 55(27): 8207-8214.
[3]  Lopez M. C, Vong Y. M, Rojas M A M, et al. Formation and growth of PbO2 inside TiO2 nanotubes for environmental applications[J]. Applied Catalysis B: Environmental, 2014, 144: 174-181.
[4]  Li G T, Qu J H, Zhang X W, et al. Electrochemically assisted photocatalytic degradation of Acid Orange 7 with β-PbO2 electrodes modified by TiO2[J]. Water research, 2006, 40(2): 213-220.
[5]  García J. G, Iniesta J, Expósito E, et al. Early stages of lead dioxide electrodeposition on rough titanium[J]. Thin Solid Films, 1999, 352(1/2): 49-56.
[6]  Ueda M, Watanabe A, Kameyama T. Performance characteristics of a new type of lead dioxide-coated titanium anode[J]. Journal of Applied Electrochemistry, 1995, 25(9): 817-822.
[7]  Meissner E. How to understand the reversible capacity decay of the lead dioxide electrode[J]. Journal of Power Sources, 1999, 78(1/2): 99-114.
[8]  Wang Y Q(王雅琼), Tong H Y(童宏扬), Xu W L(许文林). Structure change and failure behavior of Ti/SnO2+Sb2O3/PbO2 anodes during electrolysis process in H2SO4 solution[J]. Journal of Chemical Industry and Engineering(化工学报), 2004, 55(9): 1560-1563.
[9]  Devilliers D, Baudin T, Dinh M T, et al. Selective electrodeposition of PbO2 on anodised-polycrystalline titanium[J]. Electrochimica Acta, 2004, 49(14): 2369-2377.
[10]  Yeo I H, Kim S, Jacobson R, et al. Electrocatalysis of anodic oxygen transfer reaction: comparison of structural date with electrocatalytic phenomena for bismuth-doped lead dioxide[J]. Journal of Electrochemical Society, 1989, 136(5): 1395-1401.
[11]  Li H Y, Chen Y, Zhang Y H, et al. Preparation of Ti/PbO2-Sn anodes for electrochemical degradation of phenol[J]. Journal of Electroanalytical Chemistry, 2013, 689: 193-200.
[12]  Yang X P, Zou R Y, Huo F, et al. Preparation and characterization of Ti/SnO2-Sb2O3-Nb2O5/PbO2 thin film as electrode material for the degradation of phenol[J]. Journal of Hazardous Materials, 2009, 164(1): 367-373.
[13]  Yang W H(杨卫华), Wang H H(王鸿辉), Fu F(付芳). Preparation and performance of Ti/Sb-SnO2/β-PbO2 electrode modified with rare earth[J]. Rare Metal Materials and Engineering(稀有金属材料与工程), 2010, 39(7): 1215-1218.
[14]  Liang Z H(梁镇海), Bian S T(边书田), Ren S C(任所才), et al. Properties of Ti/PbO2 anode in sulfuric acid[J]. Rare Metal Materials and Engineering(稀有金属材料与工程), 2001, 30(3): 232-234.
[15]  Duan X Y, Ma F, Yuan Z X, et al. Electrochemical degradation of phenol in aqueous solution using PbO2 anode[J]. Journal of the Taiwan Institute of Chemical Engineers, 2013, 44(1): 95-102.
[16]  Vicent F, Morallón E, Quijada C, et al. Characterization and stability of doped SnO2 anodes[J]. Journal of Applied Electrochemistry, 1988, 28(6): 607-612.
[17]  An H, Li Q, Tao D J, et al. The synthesis and characterization of Ti/SnO2-Sb2O3/PbO2 electrodes: The influence of morphology caused by different electrochemical deposition time[J]. Applied Surface Science, 2011, 258(1): 218-224.
[18]  Feng Y J(冯玉杰), Shen H(沈宏), Cui Y H(崔玉虹), et al. Preparation and evaluation on the electro-catalytic character risitics of Ti-base lead dioxide electrode[J]. Journal of Molecular Catalysis, 2002, 16(3): 181-186.
[19]  Uvarow V, Popov I. Metrological characterization of X-ray diffraction methods at different acquisition geometries for determination of crystallite size in nano-scale materials[J]. Materials Characterization, 2013, 85: 111-123.
[20]  Comninellis C, Pulgarin C. Anodic oxidation of phenol for waste water treatment[J]. Journal of Applied Electrochemistry, 1991, 21(8): 703-708.
[21]  Cao J L(曹江林), Wu Z C(吴祖成), Li H X(李红霞), et al. Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution[J]. Acta Physico-Chimica Sinica, 2007, 23(10):1515-1519.
[22]  Ren X B(任秀斌), Lu H Y(陆海彦), Liu Y N(刘亚男), et al. 3-Dimensional growth mechanism of lead dioxide electrode on the Ti substrate in the process of electrochemical deposition[J]. Acta Chemica Sinica(化学学报), 2009, 67(9): 888-892.
[23]  Velichenko A B, Girenko D V, Danilov F I. Mechanism of lead dioxide electrodeposition[J]. Journal of Electroanalytical Chemistry, 1996, 405(1/2): 127-132.
[24]  Neboj?a D N, Djendji D V. Influence of the complex formation on the morphology of lead powder particles produced by the electrodeposition processes[J]. Advanced Powder Technology, 2013, 24(3): 674-682.
[25]  Johnson D C, Feng J, Houk L L. Direct electrochemical degradation of organic wastes in aqueous media[J]. Electrochimica Acta, 2000, 46(2/3): 323-330.
[26]  Ding H Y(丁海洋), Feng Y J(冯玉杰), Liu J F(刘峻峰). Comparison of electrocatalytic performance of different anodes with cyclic voltammetry and Tafel curves[J]. Chinese Journal of catalysis, 2007, 28(7): 646-650.
[27]  Wang Y Q(王雅琼), Gu S(顾衫), Xu W L(许文林), et al. Electrochemical oxidation of phenol on Ti-based PbO2 electrodes[J]. Rare Metal Materials and Engineering(稀有金属材料与工程), 2007, 36(5): 874-878.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133