几种光催化反应体系中羟基自由基表观生成率的实验研究

doi:10.7517/j.issn.1674-0475.2006.02.102

影像科学与光化学 ›› 2006, Vol. 24 ›› Issue (2): 102-109.DOI: 10.7517/j.issn.1674-0475.2006.02.102

几种光催化反应体系中羟基自由基表观生成率的实验研究

吴少林, 谢四才, 杨莉, 戴玉芬, 钟玉凤

南昌航空工业学院, 环境与化学工程系, 江西, 南昌, 330034

收稿日期:2005-08-16 修回日期:2005-12-26 出版日期:2006-03-23 发布日期:2006-03-23
通讯作者: 吴少林(1965- ),男,教授,研究方向为环境污染与治理,通讯联系人.

An Experimental Study on the Production Efficiency of Hydroxyl Radicals by Several Photocatalysis Reaction Systems

WU Shao-lin, XIE Si-cai, YANG Li, DAI Yu-fen, ZHONG Yu-feng

Department of Environmental and Chemical Engineering, NanChang Institute of Aeronautical Technology, NanChang 330034, Jiangxi, P. R. China

Received:2005-08-16 Revised:2005-12-26 Online:2006-03-23 Published:2006-03-23

摘要/Abstract

摘要： 采用邻二氮啡-Fe(Ⅱ)(橙红色)分光光度法间接测定了Fenton、UV/Fenton、UV/草酸铁/H₂O₂、UV/TiO₂4种体系中在不同条件下·OH的表观生成率,初步探讨了体系中各影响因子的作用机制.结果分析表明:对于Fenton体系、UV/Fenton、UV/草酸铁/H₂O₂而言,其最佳反应条件为pH=4.0、m(H₂O₂)/m(Fe)=1/25、铁离子的质量浓度以25 mg/L左右为宜;TiO₂光催化体系催化产生的·OH尽管受环境pH的影响相对较小,但在同等条件下·OH的表观生成率最低;4种体系中以UV/草酸铁/H₂O₂体系中·OH表观生成率最高,而且以线性的规律递增.

关键词: 羟基自由基, 光催化, 分光光度法

Abstract: By using a Phenanthroline Hydrate-Fe(Ⅱ)(salmon pink) Spectro-measurement to dictate the production efficiency of the hydroxyl radicals by the Fenton,UV/Fenton,UV/Fe(Ⅲ)-Oxalate/ H₂O₂,UV/TiO₂ under the different conditions,analyzed the mechanism reaction of different major factors.The results show that the optimal reaction conditions were pH=4.0,m(H₂O₂)/m(Fe)=1/25,and quality concentration of iron about 25 mg/L for the Fenton、UV/Fenton、UV/Fe(Ⅲ)-Oxalate/H₂O₂.The production efficiency of the hydroxyl radicals by UV/TiO₂ was smaller changed with the change of the environmental pH relative Fenton、UV/Fenton、UV/Fe(Ⅲ)-Oxalate/H₂O₂,but the production efficiency of the hydroxyl radicals by UV/TiO₂ was the lowest and UV/Fe(Ⅲ)-Oxalate/H₂O₂ was the best among the four mechanism reaction systems.

Key words: hydroxyl radicals, photocatalysis, spectro-measurement

中图分类号:

X705

吴少林, 谢四才, 杨莉, 戴玉芬, 钟玉凤. 几种光催化反应体系中羟基自由基表观生成率的实验研究[J]. 影像科学与光化学, 2006, 24(2): 102-109.

WU Shao-lin, XIE Si-cai, YANG Li, DAI Yu-fen, ZHONG Yu-feng. An Experimental Study on the Production Efficiency of Hydroxyl Radicals by Several Photocatalysis Reaction Systems[J]. Imaging Science and Photochemistry, 2006, 24(2): 102-109.

参考文献

[1] Hardwick T J.The free radical mechanism in the reactions of hydrogenperoxide[J].Can.J.Chen.,1957,35(3):428.
[2] Janzen E G,Kotake Y,Hinton R D.Stabilities of hydroxyl radical spin adducts of PBN type spin traps[J].Freeradical Biol.,Med.,1992,12:53-57.
[3] 程丽华,黄君礼,倪福祥.Fenton试剂生成·OH的动力学研究[J].环境污染治理技术与设备,2003,4(5):12-14.Chen L H,Huang J L,Ni F X.Generation kinetics of hydroxyl radicals by Fenton's reagent[J].Technique and Equipment for Environmental Pollution Control,2003,4(5):12-14.
[4] 杨莉,姚秉华,吴少林.Ce⁴⁺的掺杂和染料结构对TiO₂光催化性能的影响[J].水处理技术,2005,31(3):49-52.Yang L,Yao B H,Wu S L.Effect of Ce⁴⁺ doping and dye structure on photocatalytic performance of TiO₂[J].Tec.of Water Treatment,2005,31 (3):49-52.
[5] 吴少林,谢四才,李明俊.Fe³⁺草酸盐络合物/H₂O₂/日光体系对垃圾渗滤液的处理[J].环境科学研究,2005,18(3):29-32.Wu S L,Xie S C,Li M J.The treatment of landfill leach by solar/H₂O₂/ferric oxalate[J].Research of Environmental Sciences,2005,18 (3):29-32.
[6] 邓南圣,吴峰.环境光化学[M].北京:化学工业出版社,2003.299-300.Deng N S,Wu F.Environmental Photo Chemical[M].Beijing:Chemical Industry Press,2003.299-300.
[7] 杨敏,高迎新,王东升,等.fe(Ⅲ,Ⅱ)/H₂O₂体系中Fe(Ⅲ)水解特征对比[J].环境科学学报,2003,23(2):174-177.Yang M,Gao Y X,Wang D S,et al.Fe(Ⅲ) hydrolyzing characteristics in Fe(Ⅲ,Ⅱ)/H₂O₂ system[J].Acta Scintiae Circumstantiae,2003,23(2):174-177.
[8] 沈伟韧,赵文宽,贺飞,等.TiO₂光催化剂在废水处理中的应用[J].化学进展,1998,10(4):349-361.Shen W R,Zhao W K,He F,et al.TiO₂-based photocatalysis and its applications for waste water treatment[J].Progress in Chemistry,1998,10(4):349-361.
[9] 陶霞,赵进才.有毒有机污染物光化学降解及机理研究[J].感光科学与光化学,2002,20(4):315.Tao X,Zhao J C.Photochemical degradation of organic pollutants and related reaction mechanism[J].Photographic Science and Photochemistry,2002,20(4):315.

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几种光催化反应体系中羟基自由基表观生成率的实验研究

An Experimental Study on the Production Efficiency of Hydroxyl Radicals by Several Photocatalysis Reaction Systems

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