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TiO2胶体光催化降解罗丹明B染料

Keywords: TiO2胶体,光催化,罗丹明B

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Abstract:

TiO2胶体从钛氧有机物水解制备,表征的方法有:X射线衍射光谱(XRD)、激光散射粒径分布、傅立叶变换红外光谱(FT-IR)、X射线光电子谱(XPS)和透射电子显微镜(TEM)。利用罗丹明B染料分子作为探针分子研究TiO2胶体的光催化活性,分析了pH、催化剂用量、外加氧化剂(H2O2)用量及罗丹明B初始浓度对TiO2胶体光催化活性的影响。结果表明:制备的TiO2胶体粒子平均粒径为13.8nm(激光散法测定),光催化降解罗丹明B染料的反应属于一级动力学反应,可以用Langmuir-Hinshewood模型加以描述,反应速率常数k1为0.08413mg/(L·min),平衡吸附常数k2为1.5305L/mg;在pH为6,TiO2胶体用量为0.04%,H2O2(含量30%)用量为0.2%(V/V),光照度为69.6μW/cm2时,5h后罗丹明B染料的降解率可达到99%以上;相似的条件,0.2%的P25TiO2粉体光催化处理染料水时,罗丹明B的降解率为90%。纳米TiO2胶体不仅可以提高罗丹明B的光催化降解率,还具有用量少,可有效降低水处理成本的特点。

References

[1]  Yuan Rusheng;Guau Rongbo;Liu Ping,Photocata- lytic treatment of wastewater from paper mill by TiO2 loaded on activated carbon fibers,Colloids and Surfaces A:Physi- cochem Eng Aspects,2007(1-3).
[2]  DIONYSIOS D. DIONYSIOU ;GANESH BALASUBRAMANIAN ;MAKRAM T. SUIDAN,ROTATING DISK PHOTOCATALYTIC REACTOR: DEVELOPMENT, CHARACTERIZATION, AND EVALUATION FOR THE DESTRUCTION OF ORGANIC POLLUTANTS IN WATER,Water Research?,2000, 34(11).
[3]  王海;陈德文;王素华,二氧化钛胶体界面芳香化合物的光催化分解,化学物理学报,1995(2).
[4]  孙奉玉,吴鸣,李文钊,二氧化钛的尺寸与光催化活性的关系,催化学报,1998(3).
[5]  Xiao-Quan Chen ;Wen-Hao Shen,Preparation and Properties of Stable Nanocrystalline Anatase TiO2 Colloids,Chemical Engineering & Technology?,2008, 31(9).
[6]  万金泉;张勇;马邕文.多相光催化氧化技术在造纸废水处理中的应用[J].中国造纸学报,2002(1)
[7]  朱亦仁.膜分离和光催化氧化技术在造纸废水处理中的应用及研究进展[J].徐州师范大学学报(自然科学版),2007(4)doi:10.3969/j.issn.1007-6573.2007.04.001
[8]  陈小泉,古国榜,刘焕彬.钛酸丁酯与乙酐的反应和产物钛氧有机化合物结构分析[J].化学学报,2003(10)
[9]  沈文浩;宁利;陈小泉.二次纤维造纸废水的絮凝-光催化处理[J].华南理工大学学报(自然科学版),2011(6)doi:10.3969/j.issn.1000-565X.2011.06.016
[10]  陈小泉;古国榜.以钛氧有机物为前驱物制备具有高光催化活性的纳米二氧化钛晶体[J].催化学报,2002(4)
[11]  Chen Xiaoquan;Liu Huanbin;Gu Guobang,Preparation of nanometer crystalline TiO2 with high photo-catalytic ac- tivity by pyrolysis of titanyl organic compounds and photo- catalytic mechanism,Materials Chemistry and Physics,2005(2-3).
[12]  Ajay K. Ray,A new photocatalytic reactor for destruction of toxic water pollutants by advanced oxidation process,Catalysis Today,1998(1 -4).
[13]  熊裕华;李凤仪;朱志怀.Fe^3+/TiO2光催化降解孔雀绿染料的研究[J].水处理技术,2005(2)doi:10.3969/j.issn.1000-3770.2005.02.017
[14]  徐会颖;周国伟;孟庆海.光催化降解造纸废水的影响因素及反应机理[J].工业水处理,2008(6)doi:10.3969/j.issn.1005-829X.2008.06.004
[15]  Ruey-An doong ;chih-Hua chen ;R.A.Maithreerala,The influence of pH and cadmium sulfide on the photocatalytic degradation of 2-chlorophenol in Titanium dioxide suspensions,Water Research?,2001, 35(12).
[16]  Rodriguez S. M;Richter C;Galvez J. B,Photocatalytic degradation of industrial residual waters,Solar En- ergy,1996(05).
[17]  Rodrigues A. C;Boroski M;Shimada N. S,Treatment of paper pulp and paper mill wastewater by coag- nlation-floceulation followed by heterogeneous photocataly- sis,Journal of Photochemistry and Photobiology A:Chem- istry,2008(1).
[18]  Molinari R;Grande C;Drioli E,Photocatalytic membrane reactors for degradation of organic pollutants in water,Catalysis Today,2001(1-3).
[19]  Mozia S;Morawski A. W;Toyoda M,Applica- tion of anatase-phase TiO2 for decomposition of azo dye in a photocatalytic membrane reactor,Desalination,2009(1-3).
[20]  董振海,胥维昌.纳米TiO2光催化降解含活性红K-2BP染料废水技术研究[J].染料与染色,2006(4)doi:10.3969/j.issn.1672-1179.2006.04.014
[21]  廉安,钟俊波,李建章.KIO4光催化脱色甲基橙的研究[J].环境科学与技术,2008(10)doi:10.3969/j.issn.1003-6504.2008.10.006

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