项目名称: 介孔结构复合金属氧化物非均相Fenton反应处理染料废水及其吸附-氧化增效机理研究
项目编号: No.51208357
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 建筑环境与结构工程学科
项目作者: 郑春明
作者单位: 天津工业大学
项目金额: 25万元
中文摘要: 在非均相Fenton催化降解染料废水过程中,如何提高催化剂催化效率和重复使用稳定性是亟待解决的关键科学问题。本课题基于增强染料分子向催化剂表面的吸附-氧化能效,采用软、硬模板法,系统可控合成介孔结构复合金属氧化物非均相Fenton催化剂。充分利用其大孔径、高比表面积的结构优势和易于实现催化剂表面多种金属氧化物纳米级复合的制备特性,有效降低染料分子扩散阻力,增加金属活性位数量和分布均一性,强化不同金属间的氧化还原电势协同作用。详细考察介孔结构复合金属氧化物的构筑参数对染料分子降解性能的影响,深入研究扩散吸附与氧化降解性能高效结合的内在机理,从而制备出高催化效率和良好使用稳定性的非均相Fenton催化剂。本项目有望有效提高非均相Fenton催化剂的表面扩散吸附能力和化学反应速率,揭示材料结构-表面物理化学属性-催化性能之间的内在关联,从而为高性能Fenton催化剂的设计提供理论依据和方法支持。
中文关键词: 介孔;金属氧化物;非均相;芬顿反应;染料废水
英文摘要: During the heterogeneous Fenton catalytic degradation of organic dye wastewater process, how to improve the catalytic efficiency and reuse stability are the key scientific problems to be solved. Based on the adsorption-oxidation enhancing effect of the dye wastewater to the surface of the catalyst, we will systematically prepare the mesoporous structure composites of metal oxides as the heterogeneous Fenton catalysts using the soft- and hard-template methods. Taking full advantage of the large mesoporous size, high specific surface area and easy nano-scale composites of various metal oxides, the diffusion resistance of the dye molecules will be effectively reduced and the number of the metal active sites will be greatly increased. At the same time, the distribution of the metal active sites will be more uniform and the redox potential synergies for different metals will be strengthened. We will also examine the structured parameters effects of mesoporous structure composites of metal oxides for the degradation properties of the dye molecules in detail. After that, the internal and conjoint mechanism of diffusion adsorption and oxidative degradation will be researched in depth. The successful synthesis of heterogeneous Fenton catalysts with high catalytic efficiency and good reuse stability will be our objective.
英文关键词: mesoporous;metal oxide;heterogeneous;Fenton reactions;dye wastewater