采用电化学阳极氧化法在纯钛表面制备出TiO2纳米管阵列,应用FE-SEM和XRD表征其形貌.以该纳米管陈列薄膜为光阳极,比较了光解、光催化和光电催化对甲基橙溶液降解效率的差异,研究了pH值和外加偏压对甲基橙降解效率的影响,并建立了光电催化氧化反应的一级动力学模型来描述产生这种效果的主要因素.结果表明,在光电催化氧化体系中,TiO2纳米管阵列薄膜对甲基橙具有显著的降解作用；溶液中的电解质、溶液的pH值和外加偏压是影响光电催化效果的关键因素；最佳的降解条件为电解质存在下、pH值为3、外加偏压为1.5V,在该条件下紫外灯照射80min后降解率可达100％.
参考文献
| [1] | Guettai N;Ait Amar H .Photocatalytic oxidation of methyl orange in presence of titanium dioxide in aqueous suspension.Part Ⅱ:Kinetics study[J].Desalination,2005,185(1-3):439. |
| [2] | Photocatalytic degradation of methyl orange using polythiophene/titanium dioxide composites[J].Reactive & functional polymers,2010(5):p.282. |
| [3] | Kanheya Mehrotra;Gregory S. Yablonsky;Ajay K. Ray .Kinetic Studies of Photocatalytic Degradation in a TiO_2 Slurry System: Distinguishing Working Regimes and Determining Rate Dependences[J].Industrial & Engineering Chemistry Research,2003(11):2273-2281. |
| [4] | 李明玉,刁增辉,宋琳,王心乐,张渊明.光电化学协同催化降解孔雀绿的研究[J].环境科学,2010(07):1538-1543. |
| [5] | Aiyong Zhang;Minghua Zhou;Liang Liu;Wei Wang;Yongli Jiao;Qixing Zhou .A novel photoelectrocatalytic system for organic contaminant degradation on a TiO_2 nanotube (TNT)/Ti electrode[J].Electrochimica Acta,2010(18):5091-5099. |
| [6] | Zhao Kunjiao;Zhao Guohua;Li Peiqiang et al.A novel method for photodegradation of high-chroma dye wastewater via electrochemical pre-oxidation[J].Chemosphere,2010,80(11):410. |
| [7] | Minero C;Pelizzetti E;Malato S et al.Large solar plant photocatalytic water decontamination:Degradation of pentachlorophenol[J].Chemosphere,1993,26(12):2103. |
| [8] | Pelizzeti E;Carlin V;Minero C et al.Enhancement of the rate of photocatalytic degradation on TiO2 of 2-chlorophenol,2,7-dichlorodibenzodioxin and atranzine by inorganic oxidizing species[J].New Journal of Chemistry,1991,15(05):351. |
| [9] | Guettai N;Ait Amar H .Photocatalytic oxidation of methyl orange in presence of titanium dioxide in aqueous suspension Part Ⅰ:Parametric study[J].Desalination,2005,185(1-3):427. |
| [10] | X. Z. Li;F. B. Li;C. M. Fan .Photoelectrocatalytic degradation of humic acid in aqueous solution using a Ti/TiO_2 mesh photoelectrode[J].Water research: A journal of the international water association,2002(9):2215-2224. |
| [11] | 王玲,王炜,陶杰,陶海军.阳极氧化TiO2膜对甲基橙溶液的光催化性能研究[J].南京航空航天大学学报,2005(05):576-581. |
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%