项目名称: 基于内分泌干扰物识别的疏水分子筛负载型可见光催化剂的研制与催化性能研究
项目编号: No.21277051
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 环境科学、安全科学
项目作者: 胡芸
作者单位: 华南理工大学
项目金额: 80万元
中文摘要: 针对大量低毒性物质与微量高毒性有机污染物共存的复杂废水体系,提出基于微量高毒有机污染物识别的靶向吸附剂与光催化氧化结合的高效联合污染控制方法,以提高对有毒难降解有机污染物的选择性降解效率。采用与烷基酚类内分泌干扰物相近碳链长度的末端为氟代烷基的有机硅氧烷对介孔分子筛孔道内外表面进行疏水改性,制备出可识别烷基酚类内分泌干扰物的具有高度选择性及光热稳定性的功能吸附剂。再将Mn或Fe和N或S共掺杂的可见光响应纳米TiO2光催化剂负载到疏水改性的介孔分子筛上,制备出原位选择吸附-降解再生的新型高效稳定的可见光催化剂。催化剂经过疏水和掺杂双重改性后,同时增强其在紫外和可见光下的催化活性,提高太阳光的利用率。利用各种分子分光法研究复合光催化剂的结构-性能关系,重点阐明多元掺杂TiO2与疏水改性分子筛的协同光催化机理,为开发基于靶向污染物选择性分解的可见光催化污(废)水深度处理技术提供基础与理论支撑。
中文关键词: 内分泌干扰物;疏水分子筛;选择性吸附;可见光催化;
英文摘要: In order to increase the selective degradation efficieny for low-concentration highly toxic organic pollutants in complated wastewater system, a method of selective adsorbents combined with photocatalyst is proposed. The surface of the mesoporous molecular sieves is modified by fluorinated alkyl organic silicone with similar carbon chain length to alkyl phenolic endocrine disruptors.Then Mn(Fe)-N(S) -codoped visible light responsive TiO2 photocatalysts are supported on the hydrophobically modified molecular sieves to prepare on-site selective adsorption-visible light degradation available photocatalyst. The physicochemical properties of the catalysts are charecterized to investigate the relation between the structure of the materials and their photocatalytic performance, furthermore, to clarify the synergistic photocatalytic mechanism among the various components in the catalysts. These results will provide systematic theory and approach to the development of efficient and visible light responsive photocatalysts for toxic wastewater deep treatment.
英文关键词: endocrine disrupter;hydrophobic mesoporous molecular sieves;selective adsorption;visible light photocatalysis;