多功能二氧化钛基纳米复合材料薄层构建水体微量元素现场全分析系统研究

The research strategy of requirement-function-structure is used by this project. According to the special requirements of on-field detection of trace elements in various water samples, the titanium dioxide-based nanocomposites self-assembled thin layer (TNSTL) will be used for the first time as the adsorbent, the carrier of electric enrichment and separation, the stationary phase for thin layer chromatography, the photocatalysts photoelectroxatalyst, colorimetric (or fluorescent) probe. TNSTL with the characteristics of positive and negative charge, hydrophile, hydrophobe, high activity of photocatalysis or photoelectroxatalysis, visible light response, and non-toxicity will be used for the preconcentration, separation, photodegradation of organic compounds, removal of matrix interference, species transformation of trace elements, detection of all kinds of samples. TNSTL will be prepared by the synergistic regulation of surfaces, interfaces, and crystal surface, the orderly combination of inorganic and organic matters, the targeted regulation of specific structural parameters, the insertion of co-catalyst, and layer by layer self assembly.. The technologies of thin layer chromatography, electric separation and enrichment, visible light-induced photocatalysis and photoelectrocatalysis, and portable determination(colorimetric or fluorescent detection) will be integrated for the first time as a fully integrated trace elemental analysis system with high sensitivity, low cost, and independent intellectual property rights. A new method for the on-field elemental speciation analysiss or simultaneous detection of multiple elements and a new technology for the controllable preparation of multifunctional nanocomposites can be offered by this project.

依据“需求-功能-结构”研究策略，针对多类型水体微量元素现场检测要求，首次将纳米材料同时作为吸附剂、电分离富集载体、薄层色谱固定相、光(电)催化剂、比色(荧光)探针；通过“表面、界面、晶面”协同调控、无机有机有序调控、微观参数定向调控材料成份及结构，共催化剂夹层，静电自组装，制备多亲性(即亲水性、疏水性、正电性、负电性兼备)、负载型、高光(电)催化活性、可见光响应、无毒二氧化钛基纳米复合材料薄层，富集，分离，光降解有机物，去除基体干扰，光(电)催化转化微量元素形态，检测水溶性、疏水性、阴阳离子型样品。. 创新性整合吸附富集、薄层色谱分离、电分离富集、可见光光(电)催化和便携式(比色或荧光)检测等五项技术，集成为便携式(可视化)、器件化、高灵敏、廉价、具有自主知识产权的水质现场全分析系统；可提供现场微量元素形态分析或多元素同时检测新方法、多功能化纳米材料可控制备新技术。

依据“需求-功能-结构”研究策略，针对5种水体(海水、河水、饮用水、可食性植物水煎液、废水)10种微量元素(Cr, Mn, Fe, Ni, Cu, Zn, Sr, Pb, Se, As)全分析系统构建要求，将4种纳米材料(TiO2, CeO2, ZnO, MoO3)，4种贵金属(Ag, Au, Pt, or Pd) 或与2类量子点(氮化碳及碳)的复合材料同时作为吸附剂、分离富集载体、薄层色谱固定相、光催化剂、比色(荧光)探针；通过“表面、界面”协同调控、无机有机有序调控、微观参数定向调控材料成份及结构，共催化剂夹层等4种表界面结构调控方法，以2种方式(纤维素滤纸、静电纺丝)负载，制备多亲性(即亲水性、疏水性、正电性、负电性兼备)、负载型、高光催化活性、可见光响应、无毒二氧化钛基纳米复合材料，富集，分离，光降解3类5种有机物(水体腐殖质、苯甲醇、甲基橙、甲基紫、罗丹明 B)，去除基体干扰，光催化转化微量元素形态，检测水溶性、疏水性、阴阳离子型样品。. 整合吸附富集、膜分离、电分离、可见光光催化和便携式(比色或荧光)检测等五项技术，集成为便携式(可视化)、器件化、高灵敏、廉价、具有自主知识产权的微量元素现场全分析系统；提供微量元素检测方法、多功能化纳米材料可控制备技术；揭示纳米材料表界面结构与分离性能、吸附性能、催化性能间相关性和作用机理机制。. 项目在Advanced Functional Materials、高等学校化学学报、分析化学等国内外知名刊物发表论文21篇，其中国内刊物6篇，JCRI区6篇、II区7篇，Journal TOP 9篇；获批发明专利2项；在“科学出版社”出版专著2本。