凹凸棒石/g-C3N4/LaCoO3复合材料的制备及其光催化脱硫性能  

Preparation of Attapulgite/g-C3N4/LaCoO3 Composites and Their Performance of Photocatalytic Desulfurization

作　　者：左士祥[1] 吴红叶 刘文杰[1] 李霞章[1] 徐荣[1] 姚超[1] 吴凤芹[1] 钟璟[1] ZUO Shixiang;WU Hongye;LIU Wenjie;LI Xiazhang;XU Rong;YAO Chao;WU Fengqin;ZHONG Jing(Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,Jiangsu,China)

机构地区：[1]常州大学石油化工学院,江苏省先进催化与绿色制造协同创新中心,江苏常州213164

出　　处：《硅酸盐学报》2020年第5期753-760,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51702026);江苏省先进催化与绿色制造协同创新中心人才支持项目(ACGM2016-06-11);江苏省重点研发计划(BE2018649);常州市科技支撑计划(CE20185007;CE20185031).

摘　　要：通过水热法在凹凸棒石(ATP)棒晶表面原位生长石墨相氮化碳(g-C3N4)膜层合成了ATP/g-C3N4复合材料,然后以ATP/g-C3N4为载体,在其表面均匀负载纳米钴酸镧(LaCoO3)粒子,制备了Z-型异质结构的ATP/g-C3N4/LaCoO3光催化材料。利用X射线粉末衍射、透射电镜、紫外‒可见吸收光谱、荧光发射光谱、N2吸附-脱附和光电化学等技术对样品进行表征。在可见光照射下,考察了LaCoO3不同负载量下ATP/g-C3N4/LaCoO3对模拟汽油中的苯并噻吩(DBT)的氧化脱除能力。结果表明:与ATP/g-C3N4和LaCoO3相比,ATP/g-C3N4/LaCoO3大幅提高了可见光响应、吸收能力和光生电子-空穴对的分离效率。当光照时间为150 min时,50%-ATP/g-C3N4/LaCoO3对模拟汽油中的DBT脱除率可达85.3%。ATP/g-C3N4(graphitic carbon nitride)consisting of g-C3N4 film in-situ growth on the surface of attapulgite(ATP)rod was prepared via a hydrothermal process.Then ATP/g-C3N4 was used as a carrier to uniformly load LaCoO3 nano-particles to prepare Z-scheme ATP/g-C3N4/LaCoO3 heterojunction photocatalysts.The samples obtained were characterized by X-ray diffraction,transmission electron microscopy,ultraviolet-visible,photoluminescence,Brunauer-Emmett-Teller,specific surface area analysis and photo electrochemical analysis.The oxidative removal ability of ATP/g-C3N4/LaCoO3 at different loadings of LaCoO3 to benzothiophene(DBT)in model gasoline was investigated under visible light.The results show that ATP/g-C3N4/LaCoO3 composites dramatically enhance the visible light response,the absorption capacity and the separation of photogenerated electron-hole pairs,compared to ATP/g-C3N4 andLaCoO3.After 150-min irradiation,the desulfurizing rate of 50%-ATP/g-C3N4/LaCoO3 can achieve 85.3%.

关 键 词：凹凸棒石 石墨相氮化碳 钴酸镧 光催化脱硫 异质结 

分 类 号：TB332[一般工业技术—材料科学与工程]