基于超分子作用的聚苯胺-锌基配合物杂化体系的组装及光催化性能研究

Compared with inorganic oxide photocatalysis such as TiO2 and ZnO, Zn coordination polymer nanoparticle exhibits more excellent photocatalytic activity and stability during photocatalysis decomposition of organic dyes in contaminated water. But as all the other coordination polymer photocatalysts, Zn coordination polymer nanoparticle also possesses two drawbacks during the photocatalytic decomposition of organic dyes: firstly, poor photoresponse to visible light, which makes it can not decompose organic dyes under visible light; secondly, low quantum. Now, how to resolve these two problems has become the focus in the field of coordination polymer photocatalysis. Polyaniline (PANI) exhibits strong photoresponse under visible light. It is also regarded as a good photogenerated hole transporting material, which can separate photogenerated electron-hole effectively and enhance quantum yield. Based on these merits of PANI, to enhance the quantum yields of Zn coordination polymer, as well as achieve the decomposition of organic dyes under visible light, in this program, we intend to assemble supramolecular interactions based PANI-Zn coordination polymer hybrid system through in-situ chemical oxidation polymerization of aniline on surface of Zn coordination polymer nanoparticles. Furthermore, to improve the structure of coordination polymer and optimize the synthesis conditions of PANI-Zn coordination polymer hybrid system, we decide to study the effects of supramolecular interactions and the structure of PANI on photocatalytic activity of the hybrid system. This program will lay the foundation for further exploration of the photocatalytic activity of PANI-coordinatio polymer hybrid system.

与TiO2、ZnO等无机氧化物光催化剂相比，锌基配合物纳米粒子在有机染料光催化降解过程中显示了更高的光催化活性及稳定性。但包括锌基配合物纳米粒子在内的大多数配合物在有机染料光催化降解方面都存在两个缺点：（1）在可见光区内光响应弱，无法实现可见光条件下的光催化；（2）量子产率低。目前，如何解决上述问题已成为配合物光催化领域研究的焦点。聚苯胺在可见光区域内有较强的光响应，同时也是光生空穴的良好载体，可促进电子-空穴的分离，提高量子产率。基于聚苯胺的以上特点，本项目拟通过苯胺在配合物纳米粒子表面的原位氧化聚合组装基于超分子作用的聚苯胺-锌基配合物杂化体系，在提高量子产率的同时实现配合物在可见光条件下对有机染料的光催化降解。并且研究聚苯胺的结构及超分子作用的强弱对杂化体系光催化性能的影响，以改进配合物的结构，优化杂化体系的组装条件，为聚苯胺-配合物杂化体系光催化性能的深入研究打下基础。

锌基配合物纳米粒子在有机染料光催化降解过程中显示了更高的光催化活性及稳定性。但包括锌基配合物纳米粒子在内的大多数配合物在有机染料光催化降解方面都存在两个缺点：（1）在可见光区内光响应弱，无法实现可见光条件下的光催化；（2）量子产率低。目前，如何解决上述问题已成为配合物光催化领域研究的焦点。聚苯胺在可见光区域内有较强的光响应，同时也是光生空穴的良好载体，可促进电子-空穴的分离，提高量子产率。基于聚苯胺的以上特点，本项目拟通过苯胺在配合物纳米粒子表面的原位氧化聚合组装基于超分子作用的聚苯胺-锌基配合物杂化体系，在提高量子产率的同时实现配合物在可见光条件下对有机染料的光催化降解。并且研究聚苯胺的结构及超分子作用的强弱对杂化体系光催化性能的影响，以改进配合物的结构，优化杂化体系的组装条件，为聚苯胺-配合物杂化体系光催化性能的深入研究打下基础。本项目在研究配合物与聚苯胺复合的同时，还研究了配合物与炭基材料的制备，及光催化性能的研究，扩展了本项目的研究范围。