高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 105.

• 研究论文 • 上一篇    下一篇

非水溶性席夫碱铁疏水异相光催化降解有毒有机污染物

曹婷婷,邹彩琼,罗光富,陈登霞,赵小蓉,李瑞萍,黄应平   

  1. 三峡大学三峡库区生态环境教育部工程研究中心, 宜昌 443002
  • 收稿日期:2010-06-02 修回日期:2010-11-15 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 黄应平 E-mail:chem_ctgu@126.com
  • 基金资助:

    国家自然科学基金(批准号: 20877048, 50979049)、湖北省高校优秀中青年创新团队计划(批准号: T200703)和湖北省自然科学基金创新群体项目(批准号: 2009CDA020)资助.

Heterogenous Degradation of Toxic Organic Pollutants by Hydrophobic Iron(Ⅲ) Schiff Base Complex Under Visible Irradiation

CAO Ting-Ting, ZOU Cai-Qiong, LUO Guang-Fu, CHEN Deng-Xia, ZHAO Xiao-Rong, LI Rui-Ping, HUANG Ying-Ping*   

  1. Engineering Research Center of Eco\|environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China
  • Received:2010-06-02 Revised:2010-11-15 Online:2011-01-10 Published:2010-12-11
  • Contact: Huang Yingping E-mail:chem_ctgu@126.com
  • Supported by:

    国家自然科学基金(批准号: 20877048, 50979049)、湖北省高校优秀中青年创新团队计划(批准号: T200703)和湖北省自然科学基金创新群体项目(批准号: 2009CDA020)资助.

PDF (PC)

被引次数

23

摘要： 通过化学方法合成了疏水性金属有机复合物双（水杨醛）邻苯二胺席夫碱铁（Fe-Bis-Schiff-base- salicylaldehyde-o-Phenylenediamine，Fe-SPA）。在水溶性介质体系中，以Fe-SPA疏水特性作为异相光催化剂降解有毒有机污染物，在pH 7.2介质，可见光（λ>420nm）照射下，通过Fe-SPA活化H2O2降解有毒有机污染物罗丹明B（Rhodamine B，RhB）、亚甲基蓝（Methylene Blue trihydrate，MB）和2,4-二氯苯酚（2,4-Dichlorophenol，2,4-DCP），研究了Fe-SPA的光催化特性。在实验条件下，反应150min RhB褪色完全，反应300min MB 褪色完全，反应10h DCP降解率达到65%。采用ESR（电子顺磁共振）跟踪测定活性氧化物种，检测到催化体系中产生了高氧化活性羟基自由基。通过RhB体系降解过程中的紫外-可见光谱和红外光谱分析，表明目标底物有效降解且最终转化为胺类和羧酸类小分子。在水溶性介质体系中，Fe-SPA以疏水特性作为异相光催化剂具有良好的稳定性，循环使用5次，光催化活性基本稳定。

关键词: Fe(Ⅲ) shiff base, photocatalytic, toxic organic pollutants

Abstract: A hydrophobic Iron(Ⅲ) Schiff Base complex, Fe-Bis-Schiff-base-salicylaldehyde-o- Phenylenediamine (Fe-SPA), was prepared by chemical synthetic method. In a water-soluble medium, the hydrophobic Fe-SPA could be used as a heterogeneous photocatalyst to degradate organic pollutants. The photo-catalytic degradation of Rhodamine B (RhB), Methylene Blue trihydrate(MB) and 2, 4-dichlorophenol (2,4-DCP) under the visible irradiation and neutral condition (at pH 7.2) were used as probe reactions to evaluate the photo-catalytic activities of Fe-SPA. Under the optimal conditions, RhB was decolored completely in 150min, MB was decolored completely in 300min, and DCP was removed more than 65% in 10h. ESR results showed that the highly reactive oxygene species ?OH was produced in the reaction. IR and Uv-Vis results indicated that RhB was degraded to small moleculars, such as amine substances and carbonyl (carboxyl) compounds. In a water-soluble medium, the hydrophobic Fe-SPA which was used as a heterogeneous photocatalyst is stable after 5 recycles.

Key words: Fe(Ⅲ) shiff base, photocatalytic, toxic organic pollutants

TrendMD: