分别以乙醇、异丙醇、正丁醇为溶剂配制涂液,采用刷涂热分解法制备了稀土Nd共掺杂的Ti/SnO2 -Sb-Nd电极.采用SEM、XRD、伏安电荷、电化学孔隙率、分形维数、降解苯酚实验等研究了溶剂对电极微观形貌、晶体结构和电化学性能的影响.结果表明:随着所用醇类溶剂的与羟基相连的碳链复杂化和延长,制得电极涂层的微观表面趋于平整,物理比表面积变小.碳链最长的正丁醇溶剂体系制得了结晶最好的SnO2电极涂层,并且有效的阻止了钛基体被氧化.按照乙醇、异丙醇、正丁醇顺序,相应的3种电极的伏安电荷分别为1.783,2.074,2.884 mC·cm-2,这表明电极的电化学活性面积依次增大;电极涂层的电化学孔隙率分别为97.78%,53.11%,51.68%;电极涂层的分形维数分别为1.892,1.978,1.968;当累积通电量为4.783 Ah ·L-1时,苯酚降解率分别达到87.49%,90.04%,91.50%,在此过程中槽压分别升高了3.94,1.48,1.44V.伏安电荷、电化学孔隙率和分形维数的变化规律有效地反映了电极的电催化氧化活性和稳定性的变化.
参考文献
[1] | Martinez-Huitle CA;Ferro S .Electrochemical oxidation of organic pollutants for the wastewater treatment: direct and indirect processes[J].Chemical Society Reviews,2006(12):1324-1340. |
[2] | Comminellis Ch;Pulgarin C .Electrochemical oxidation of phenol for wastewater treatment using SnO2 anodes[J].Journal of Applied Electrochemistry,1993,23(02):108. |
[3] | Stucki S;Kotz R;Carcer B;Suter W .Electrochemical waste water treatment using high overvoltage anodes part 2:Anode performance and applications[J].Journal of Applied Electrochemistry,1991,21(02):99. |
[4] | 杨耀辉,彭乔.铈掺杂对Ti/Sn-Sb阳极性能的影响研究[J].稀有金属,2009(03):356-360. |
[5] | 冯玉杰,丁海洋,张文军.CV和Tafel曲线对稀土掺杂Ti/SnO2-Sb电极电催化性能研究[J].材料科学与工艺,2009(02):278-280,284. |
[6] | 但建明,陈康宁.影响电极表面形态及电性能因素的分析[J].氯碱工业,2000(11):11-14,15. |
[7] | 赵卫民,刘长久,宋莎,李广燕.掺杂钇和铝的α-Ni(OH)2电极材料的结构及电化学性能[J].稀有金属,2009(03):366-370. |
[8] | 李建军,郝维昌,许怀哲,王天民.Li, Co共掺杂ZnO纳米颗粒的结构和磁性研究[J].稀有金属,2009(06):825-830. |
[9] | 李山梅,叶锋,魏浩杰,侯淼淼,王同涛,王新东.Ir_(1-x)Ru_xO_2/Ti析氧阳极的电催化活性研究[J].稀有金属,2010(01):63-67. |
[10] | 贾铮;戴长松;陈玲.电化学测量方法[M].北京:化学工业出版社,2006:144. |
[11] | 胡吉明,朱艳冗,孟惠民,孙冬柏,吴继勋,杨德钧.钛基IrO2-Ta2O5涂层阳极电化学多孔性研究[J].稀有金属,2000(05):345-348. |
[12] | Ardizzone S;Fregonara G;Trasatti S .Inner and outer active surface of RuO2 electrodes[J].Electrochimica Acta,1990,35(01):263. |
[13] | Montilla F;Morallon E;DeBattisti A;Vazquez J L .Preparation and characterization of antimony-doped tin dioxide electrodes.Part 1 Electrochemical characterization[J].Journal of Physical Chemistry B,2004,108(16):5036. |
[14] | Stromme M.;Granqvist CG.;Niklasson GA. .VOLTAMMETRY ON FRACTALS[J].Solid State Communications,1995(3):151-154. |
[15] | Eftekhari A .On the fractal study of LiMn2O4 electrode surface[J].Electrochimica Acta,2003,48(19):2831. |
[16] | 梁镇海 .固溶体中间层钛基氧化物阳极研究[D].太原理工大学,2006. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%