非化学计量比富氧缺陷氧化钨/二氧化钛杂化纳米片的构建及光催化性能研究

项目名称： 非化学计量比富氧缺陷氧化钨/二氧化钛杂化纳米片的构建及光催化性能研究

项目编号： No.51472226

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 席广成

作者单位： 中国检验检疫科学研究院

项目金额： 80万元

中文摘要： 具有等离子体共振效应的氧化钛基可见光光催化材料是当前研究的热点之一，等离子体共振效应发生载体通常是贵金属纳米粒子。如何进一步提高其光催化效率、降低成本，是该种材料研究的难点与瓶颈。非化学计量比的蓝色WO3-x 最近被发现具有等离子体共振效应，强烈吸收可见－近红外光。本项目根据活性晶面暴露的二维片状异质型复合半导体具有加强光能的吸收与利用、促进光生载流子的迁移与分离、加强反应物吸附等多重优点，通过溶液相制备路线，合成WO3-x纳米粒子负载的TiO2纳米片复合材料，研究该新型非贵金属等离子效应光催化材料的形成机理，探讨其在可见光辐照下降解持久性有机污染物的效率提高机制，揭示WO3-x负载的活性晶面暴露的氧化钛基复合材料的结构与光催化性能之间的构效关系，为制备高效、可见光响应、环境友好的新型光催化材料提供新思路、新方法，对促进化学、环境和材料学科的交叉融合，解决环境污染问题，具有重要的学术意义。

中文关键词： 非贵金属等离子效应；可见光响应；光催化；二氧化钛纳米片；蓝色氧化钨

英文摘要： Titanium oxide -based visible-light Photocatalysts with localized surface plasmon resonance (LSPR) is one of the hotspots of the current study. Currently, the carrier of the LSPR effect are mainly noble metal nanoparticles . How to further improve their photocatalytic efficiency abd reduce costs are the difficulties and bottlenecks of the kinds of materials research. Nonstoichiometric blue WO3-x has recently been found to have LSPR effect, and can strongly absorb visible and near infrared light. Two-dimensional (2D) nanosheet-like semiconductor heterostructure with exposed active facets could strengthened the absorption and utilization of solar light, promote the migration and separation of photo-generated carriers, improve the adsorption of reactants, therefore, the researcheres for the preparation of WO3-x nanoparticles load TiO2 nanosheets with exposed active facets is very important. By studying the formation mechanism of the new non-precious metal plasma photocatalytic materials, we can find some new ways to improve photocatalytic degradation efficiency of persistent organic pollutants. At the same time, by revealing the relationships between structure and properties of the photocatalytic activity of the WO3-x nanoparticles loaded TiO2 nanosheets, we can develope highly efficient, visible light response and environment friendly new titanium-based photocatalytic materials.

英文关键词： nanomaterials;visible light response;photocatalysis;TiO2 nanosheets;blue tungsten oxide