W18O49纳米材料表面结构与化学性质调控及其对光催化性能的协调机制研究

项目名称： W18O49纳米材料表面结构与化学性质调控及其对光催化性能的协调机制研究

项目编号： No.51472152

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： 黄剑锋

作者单位： 陕西科技大学

项目金额： 85万元

中文摘要： W18O49纳米材料是一类理想的新型环境污染物处理材料，然而其微观结构对光催化反应的影响机制尚不明确，且如何进一步提高其性能也是亟需解决的问题。针对该现状，本项目提出在溶剂热条件下对W18O49纳米晶进行微观形貌的可控合成。拟首先在溶剂热环境中调控表面活性剂或极性溶剂在纳米晶不同晶面表面的吸附状态，控制其不同晶面的生长来获得不同的暴露晶面结构；再研究纳米晶暴露晶面的结构特征、表面亲核性、表面路易斯酸度等因素对光催化性能的影响，以明确W18O49纳米晶的高催化活性晶面，进一步提升其光催化性能；通过详细研究其制备工艺、结构和性能，构建W18O49纳米晶暴露晶面结构-表面化学状态-光催化反应活性的关系模型，搞清楚纳米晶暴露晶面表面化学特性影响光催化反应的机理。探索通过调控纳米晶微观结构来提升纳米晶光催化反应效率的有效途径，为进一步提升W18O49材料的光催化性能和拓展其应用领域奠定基础。

中文关键词： 无机非金属材料；功能材料；结构调控；表面性质；光催化性能

英文摘要： As an ideal novel materials for environmental pollution treatment, W18O49 nanocrystalline are in urgent need of improving their photocatalytic performance with specific explanation of the relationship between its crystalline microstructure and photo-reaction mechanism. Inspired by this need, the syntheses of W18O49 nanocrystalline with desired microstructures will be developed under solvothermal conditions in the present project. Firstly, the exposed crystal facets of the nanocrystalline will be controlled by adjusting the growth habit on different crystallographic planes of W18O49 structure. Secondly, the exposed W18O49 crystal facets will be studied to find the influences of their surface structure, intrinsic proton affinity and surface lewis acidity on the crystalline photocatalytic performance. This project is aimed at defining the W18O49 crystal facets with high reactivity to enhance its photocatalytic efficiency. In the project, the relationship between the surface structure and catalytic reactivity of the crystalline will be studied. The approach to adjusting the W18O49 crystalline structure will be explored to enhance its photocatalytic efficiency with improved synthetic process. The in-depth affecting mechanism of the surface chemical properties on the photocatalytic process will be revealed. Finally, the research results of this project could provide new solution and theoretical foundation for broadening the application of W18O49 materials in photocatalytic field with improved performance.

英文关键词： Inorganic non-metallic material;Functional material;Structure control;Surface properties;Photocatalytic activity