新型二氧化钛掺杂介孔材料的固相合成及缺陷浓度与光催化活性的关联

项目名称： 新型二氧化钛掺杂介孔材料的固相合成及缺陷浓度与光催化活性的关联

项目编号： No.21061006

项目类型： 地区科学基金项目

立项/批准年度： 2011

项目学科： 金属学与金属工艺

项目作者： 刘少友

作者单位： 凯里学院

项目金额： 10万元

中文摘要： 目前光催化降解反应机理研究并没有探讨材料体相中缺陷浓度对量子效率的影响，因而不能宏观调控材料的微观结构使光催化活性与光响应范围一致。为充分利用太阳光能，本课题主要探讨低热固相合成法制备的新型第IIIA族元素(B、Al、Ga、In)与非金属(S、N、P)共掺杂二氧化钛介孔光催化材料的缺陷浓度与可见光降解性能的关联规律及其作用机制，重点研究表面活性剂/非表面活性剂、焙烧温度、反应物配比及配位阴离子等因素及超声与微波技术对所得介孔材料在物相织构、缺陷浓度及光催化性能影响的规律和工艺条件，运用中心组合规则与SAS8.2统计软件优化合成及可见光降解有机污染物的工艺条件，探讨表面活性剂与非表面活性剂调控缺陷浓度，使光响应范围涵盖整个可见光区并相应具有很高光降解活性的一般性规律，获得缺陷浓度及其分布与光降解活性相关性规律，以期填补在这一研究领域的空白，为太阳能的有效利用提供科学理论基础

中文关键词： 二氧化钛掺杂；介孔材料；调控合成；缺陷浓度；光降解活性

英文摘要： Recently, the effect of defect concentration on quantum efficiency in bulk phase of materials was not investigated in reaction mechanism of photocatalytic degradation, therefore, the microstructure of materials can not be controlled, and the photocatalytic activity can not be consistent with the spectral response range. To effectively use the solar energy, the reaction mechanism and relevancy rule of the defect concentration and the visible light degradation property, existing in the new typical titanium dioxide mesoporous photocatalytic materials prepared with the doping of IIIA element (B,Al,Ga,In) and nonmetal (S, N, P) by solid state reaction route at low temperature, are mainly discussed in this project. It is emphases that the influencing factors such assurfactant/ nonsurfactant, calcination temperature, molar ratio of reactant, coordination anion, and the technic conditions such as ultrasound and microwave technology effect on their phase structure, defect concentration and photocatalytig property during the preparation of mesoporous TiO2 materials. Meanwhile, optimization of the synthesis condition and the visible light degradation organic contamination technology condition are investigated by central composite design and SAS8.2 statistic software. Moreover, the universality rule that both surfactant and nonsurfactant control the defect concentration and the adsorption region of mesoporous materials with hig photodegradation activity covers the visible light region are investigated, and the pertinence rule about the defect concentration and its distribution for the photodegradation activity is obtained. Which can be effectively utilized solar energy to provide with science theoretic foundation and fill up the blank in this reseach field.

英文关键词： Titanium dioxide doped; mesoporous materials; control synthesis; defect concentration; photodegradation activity