基于聚吡咯载体的Ag/AgCl表面等离子体可见光催化剂的制备及催化性能研究

项目名称： 基于聚吡咯载体的Ag/AgCl表面等离子体可见光催化剂的制备及催化性能研究

项目编号： No.21204015

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 高分子科学

项目作者： 姚同杰

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 开发性能优异、结构可控、可重复利用的可见光催化剂,并将其应用于有机污染物的降解，对环境保护具有重要意义。本项目针对这一课题，设计了"在聚吡咯（PPy）载体表面生成Ag纳米粒子，并原位部分刻蚀Ag纳米粒子"的新思路来制备Ag/AgCl-PPy表面等离子体可见光催化剂；同时，以偶氮类染料为研究对象，详细考察Ag/AgCl-PPy的可见光催化性能，并阐明机理。相对于传统的制备方法，本研究中，PPy载体不仅起到承载Ag/AgCl的作用；而且利用PPy的特性，结合FeCl3溶液的刻蚀可以实现对Ag纳米粒子形貌尺寸的有效调控；更重要的是，PPy与Ag/AgCl之间能够产生协同效应，因此会极大地提高Ag/AgCl-PPy材料的可见光催化性能。本项目的实施，不仅为制备基于PPy载体的Ag/AgCl表面等离子体可见光催化剂开辟了一条新途径，而且还可以促进化学、材料及环境等学科的综合交叉，具有重要的学术意义。

中文关键词： 聚吡咯；贵金属纳米粒子；表面等离子体共振；光催化；催化

英文摘要： Developing visible-light photocatalyst with excellent performance, controlled structure and reusability, and applying them to the degradation of organic pollutants have important significance in environmental protection. In this project, Ag/AgCl-PPy visible-light plasmonic photocatalyst is prepared through a novel way, in which Ag nanoparticles are first synthesized on polypyrrole (PPy) supporter surface, and then Ag nanoparticles are partly etched in situ. Azo dyes are selected as the research object, the visible-light photocatalytic property and mechanism of Ag/AgCl-PPy are studied in detail. Compared with traditional synthetic route, PPy not only works as a supporter for Ag/AgCl, but also has ability to control the morphology and size of Ag nanoparticles with the help of FeCl3 solution etching. More importantly, there is good synergistic effect between PPy supporter and Ag/AgCl, which can greatly improve the visible-light catalytic property of Ag/AgCl-PPy. This project not only explores a novel way to prepare Ag/AgCl visible-light plasmonic photocatalyst supported on PPy, but also promotes the cross-disciplinary research among chemistry, material science and environmental science.

英文关键词： polypyrrole；noble metal nanoparticles；surface plasmon resonance；photocatalysis；catalysis