FexOy@ACSs负载BiOBr材料的制备及光还原CO2性能研究

摘要：

通过悬浮聚合法在酚醛树脂球的制备过程中嵌入Fe盐,经高温碳化和水蒸气活化合成具有高效吸附CO2的含铁氧化物的活性碳球(FexOy@ACSs).同时,将制备的BiOBr通过浸渍法负载于FexOy@ACSs表面制得高效吸附-光还原CO2的BiOBr/FexOy@ACSs复合光催化剂.XRD(X射线衍射分析)和XPS(X射线光电子能谱)表征分析表明,Fe元素以Fe2O3和Fe3O4化合物形式嵌入ACSs.SEM(扫描电子显微镜)和CO2-TPD(CO2-程序升温脱附)结果显示,FexOy@ACSs保持良好的孔道结构和CO2吸附能力,同时BiOBr光催化剂均匀担载于FexOy@ACSs表面与其形成良好的协同作用.光催化还原CO2能力测试数据表明,BiOBr/FexOy@ACSs光还原CO2的CO产率(43.85μmol·g-1·h-1)明显优于BiOBr(2.39μmol·g-1·h-1)和FexOy@ACSs(11.65μmol·g-1·h-1).最后,讨论了BiOBr/FexOy@ACSs光还原CO2作用机理.研究结果为强吸附-高效光还原CO2的光催化复合催化剂体系的构建提供新的思路和方法.

FexOy/activated carbon spheres(FexOy@ACSs)with strong CO2adsorption capacity were synthesized via embedding Fe salt into the phenolic resin spheres on the basis of suspension polymerization method and then activated through high temperature carbonization and water vapor activation.Moreover,as-prepared BiOBr samples were loaded on the surface of FexOy@ACSs by simple impregnation method,obtaining the BiOBr/FexOy@ACSs composite photocatalysts with efficient adsorption-photocatalytic CO2reduction performance.The analysis results of XRD(X-ray diffraction analysis)and XPS(X-ray photoelectron spectroscopy)confirmed that Fe element was embedded into the ACSs in the form of Fe2O3and Fe3O4compounds.Besides,SEM(scanning electron microscope)and CO2-TPD(CO2-temperature programmed desorption)results showed that FexOy@ACSs exhibited excellent pore structures and CO2adsorption capacity,and BiOBr photocatalyst was uniformly supported on the surface of FexOy@ACSs to form a good synergy effect.The photocatalytic CO2reduction tests illustrated that the yield(43.85μmol·g-1·h-1)of CO2photoreduction to CO over BiOBr/FexOy@ACSs was much higher than BiOBr(2.39μmol·g-1·h-1)and FexOy@ACSs(11.65μmol·g-1·h-1).Finally,a possible CO2photoreduction action mechanism of BiOBr/FexOy@ACSs was proposed and investigated.Our work should provide novel ideas and methods for the construction of the composite system with strong CO2adsorption and efficient photocatalytic CO2reduction ability.

作者：

郝瑞刚 刘康利 张长明 吕志平 张小超

Hao Ruigang;Liu Kangli;Zhang Changming;LüZhiping;Zhang Xiaochao(Department of Environmental and Safety Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China;College ofChemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：

太原工业学院环境与安全工程系 太原理工大学化学与化工学院 太原理工大学矿业工程学院

出处：

《betway官方app 学报：自然科学版》 CAS 北大核心 2021年第4期68-75,共8页

基金：

国家自然科学基金(21978193 21706179) 山西省优秀青年自然科学基金(201801D211008).

关键词：

活性碳球 BiOBr 铁氧化物 光催化 CO2还原

activated carbon spheres BiOBr iron oxide photocatalysis CO2reduction

分类号：

O413 [理学—理论物理]

Fe_(x)O_(y)@ACSs负载BiOBr材料的制备及光还原CO_(2)性能研究.pdf