CNT-CdS-TiO_2光催化剂的制备及其光催化性能  

Preparation and Photocatalytic Properties of CNT-CdS-TiO_2

作　　者：武军伟[1] 朱留东 胡兰青[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《材料科学与工程学报》2018年第1期72-76,86,共6页Journal of Materials Science and Engineering

基　　金：长江学者与创新团队发展计划资助项目(IRT0972)

摘　　要：采用溶胶凝胶法,以硝酸镉为镉源、钛酸四丁酯为钛源、硫脲为硫源,碳纳米管(CNT)为载体,分别制备了TiO_2、CdS-TiO_2、CNT-CdS-TiO_2催化剂。对TiO_2,CdS-TiO_2,CNT-CdS-TiO_2的晶型和微观形貌进行了表征。结果表明:TiO_2为锐钛矿,CdS为六方相;TiO_2与CdS均匀包覆在CNT的表面。对TiO_2、CdS-TiO_2、CNT-CdS-TiO_2分别进行了紫外-可见吸收光谱的测试和可见光条件下降解亚甲基蓝的光催化性能测试。结果表明CdS-TiO_2、CNT-CdS-TiO_2吸收峰发生红移;TiO_2、CdS-TiO_2、CNT-CdS-TiO_2在可见光下对亚甲基蓝的降解率依次提高,CNT-CdS-TiO_2的降解率可达到55%。The TiO_2,CdS-TiO_2,CNT-CdS-TiO_2 photocatalysts were prepared by sol-gel method with cadmium nitrate as Cd source material,tetrabutyl titanate as Ti source,thiourea as S source and CNT as support.The structure and morpholoy of TiO_2,CdS-TiO_2 and CNT-CdS-TiO_2 were investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM）technique and transmission electron microscopy（TEM）.The result shows that TiO_2 is anatase phase and CdS is hexagonal phase.TiO_2 and CdS cover on the surface of the CNT uniformly.UV-visible spectra and photocatalytic performance of TiO_2,CdS-TiO_2 and CNTCdS-TiO_2 were tested.Testing for UV-visible absorption spectroscopy indicates that the absorption peaks for CdS-TiO_2 and CNT-CdS-TiO_2 red shifted.Photocatalytic degradation of methylene blue shows that CdS-TiO_2 and CNT-CdS-TiO_2 shows higher catalytic activity than pure TiO_2 under the irradiation of visible light.The degradation of methylene blue for CNT-CdS-TiO_2 has reached 55%.

关 键 词：CNT CDS TiO2 可见光 光催化性能 

分 类 号：TQ050.4[化学工程]