以钛酸丁酯为先驱体、无水乙醇为溶剂、二乙醇胺为鳌合剂,采用溶胶-凝胶浸渍提升法制备钛基TiO2-SnO2复合电极.借助于含油废水化学需氧量(COD)的去除效果和紫外吸收光谱考察了电极的电催化氧化能力.并采用SEM、XRD和EDX等表征方法分析了Sn的掺杂对所制备电极表面形貌、涂层晶体结构和电极表层的元素组成的影响,通过电化学线性伏安扫描测定了其析氧电位,分析了电极结构与电催化特性之间的关系.结果表明,当热处理温度为500℃时,所制备电极的涂层中TiO2主要为锐钛矿型,掺杂适量Sn后,电极的表面变得更加平滑、致密,涂层表面晶粒明显细化.当Sn的摩尔掺杂比为n(Ti):n(Sn)=100:10时,复合氧化物涂层电极的电催化性能最好,电极的析氧电位为2.1 V,此电极处理含油废水60 min时,COD去除率达到了87.5%,较未添加Sn的电极相比对COD的去除率提高了26.7%,这说明掺杂适量的Sn提高了电极的催化性能.
参考文献
| [1] | Brillas E.;Casado J.;Calpe JC. .Mineralization of 2,4-D by advanced electrochemical oxidation processes[J].Water research: A journal of the international water association,2000(8):2253-2262. |
| [2] | Fockedy E .Coupling of anodic and cathodic reaction of phenol electro-oxidation using three-dimensional electrodes[J].Water Research,2002,36(05):4169-4175. |
| [3] | CHRISTIANE A. R. RAGNlNI;ROSANA A. DI IGLIA;WALDIR BIZZO .RECYCLED NIOBIUM FELT AS AN EFFICIENT THREE- DIMENSIONAL ELECTRODE FOR ELECTROLYTIC METAL ION REMOVAL[J].Water research: A journal of the international water association,2000(13):3269-3276. |
| [4] | Aal AA;Hassan HB;Rahim MAA .Nanostructured Ni-P-TiO2 composite coatings for electrocatalytic oxidation of small organic molecules[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2008(0):17-25. |
| [5] | S.M.A. Shibli;V.S. Dilimon .Development of TiO_2-supported nano-RuO_2-incorporated catalytic nickel coating for hydrogen evolution reaction[J].International journal of hydrogen energy,2008(4):1104-1111. |
| [6] | 孙娟,沈嘉年,姚书典.贵金属掺杂Ti/TiO2电极的制备及其电催化性能研究[J].化学学报,2006(07):647-651. |
| [7] | Ollis D F;Pelizzetti E;Serpone N .Photocatalyzed destruction of water contaminants[J].Environmental Science and Technology,1991,25:1522-1529. |
| [8] | 施利毅;李春忠;房鼎业 等.二氧化钛超细粒子的制备及其光催化降解含酚溶液[J].华东理工大学学报,1998,24(03):291-297. |
| [9] | Darrin S.Muggli;Lefei Ding .Photocatalytic performance of sulfated TiO_2 and Degussa P-25 TiO_2 during oxidation of organics[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2001(3):181-194. |
| [10] | 郑珊,高濂,张青红,郭景坤.TiO2修饰MCM-41的结构表征及光催化苯酚降解活性[J].催化学报,2001(02):206-208. |
| [11] | 成英之,张渊明,唐渝.WO3-TiO2薄膜型复合光催化剂的制备和性能[J].催化学报,2001(02):203-205. |
| [12] | 徐自力,薛宝永,杨秋景,谢超,张剑宝,杜尧国.纳米TiO2-SnO2的制备及其对庚烷的气相光催化性能[J].应用化学,2004(10):980-984. |
| [13] | 张招贤.钛电极工学[M].北京:冶金工业出版社,2003 |
| [14] | 刘峻峰,冯玉杰,孙丽欣,钱正刚.钛基SnO2纳米涂层电催化电极的制备及性能研究[J].材料科学与工艺,2006(02):200-203. |
| [15] | 刘蕊,陈斌,何方波.Ru-Ir-Sn-Ti/Ti氧化物涂层阳极的性能研究[J].电镀与涂饰,2008(06):41-44. |
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%