活化半焦负载Fe掺杂TiO_2光催化烟气脱硝的研究  

Investigation of Photocatalytic Removal of NO From Flue Gas by Fe-TiO_2 Loaded on Activated Semi-Coke

作　　者：孙圣楠[1] 李春虎[1,2] 闫欣[1] 郑昱[1] 杨微微[1] 王亮[1] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]中国海洋大学海洋化学理论与工程教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2015年第11期63-68,共6页Periodical of Ocean University of China

基　　金：国家科技支撑十二五计划项目(2011BAD14B04)资助

摘　　要：利用溶胶-凝胶法制备了活化半焦负载Fe掺杂TiO2的光催化剂,分别在紫外和可见光下考察了其对模拟烟气的光催化氧化脱硝效果。实验结果表明,Fe掺杂后的光催化剂在紫外和可见光下较未掺杂的光催化剂氧化脱硝率分别提高了15%和10%,结合XRD和FT-IR分析可知,Fe元素以取代掺杂的方式进入TiO2晶格中,并形成光生电子和空穴的捕获陷阱,有效延长了光生载流子的分离,从而使得参加光催化反应的光生载流子数量增加,进而提高了紫外光催化脱硝活性并扩展了可见光的响应。Photocatalysts Fe-TiO2 loaded on activated semi-coke were prepared by sol-gel method and investigated under UV and visible light irradiation on the photocatalytic activities for NO removal.The results showed that Fe-doped catalysts performed 15% and 10% more than undoped catalysts on photocatalytic NO removal efficiency under UV and visible light irradiation,respectively.X-ray diffraction and FTIR spectra results indicate that Fe gets into the TiO2 lattice by substitution doping and results in the formation of trap sites of photogenerated electrons and holes,which will effectively extend the separation of photogenerated electrons and holes.As a result,the number of photogenerated charge carriers participating in photocatalytic reaction increase and then leads to the increasing of photocatalytic activities and the response to visible light.

关 键 词：活化半焦 溶胶-凝胶法 Fe掺杂TiO2 光催化脱硝 

分 类 号：X511[环境科学与工程—环境工程]