一维CdTe@C@TiO2-Au异质结纳米线的制备及其光催化性能
Fabrication and Photocatalytic Performance of One-Dimensional Structured CdTe@C@TiO2-Au Heteronanowires
作者单位E-mail
陈素清 台州学院医药化工学院, 台州 318000  
梁华定 台州学院医药化工学院, 台州 318000  
金燕仙 台州学院医药化工学院, 台州 318000  
沈茂 台州学院医药化工学院, 台州 318000 shenmao19820808@163.com 
摘要: 先利用一步水热法制备了具有核壳结构的CdTe@C纳米线,然后以钛酸异丙酯(TIP)作为钛源对CdTe@C纳米线进行二氧化钛包覆,最后通过原位还原HAuCl4的方法将Au纳米粒子组装到CdTe@C@TiO2表面形成CdTe@C@TiO2-Au一维异质结纳米复合材料。用扫描电镜(SEM),X射线能谱(EDX),透射电镜(TEM),X射线衍射(XRD),X射线光电子能谱(XPS)和紫外-可见漫反射光谱(UV-Vis DRS)等对材料进行表征。探究了CdTe@C@TiO2-Au催化剂在模拟可见光下降解罗丹明B(RhB)的光催化性能。实验结果表明:不同催化剂对RhB的光降解率不一样,其效果依次为CdTe@C@TiO2-Au > CdTe@C@TiO2 > pure TiO2,其中CdTe@C@TiO2-Au能在270 min的模拟太阳光下对RhB的光降解率达95.3%,这主要得益于CdTe、碳层、TiO2和具有表面等离子效应的纳米Au的共同作用。
关键词: 纳米线  贵金属  核壳结构  光降解
基金项目: 国家自然科学基金项目(No.21403150),浙江省教育厅自然科学基金项目(No.Y201224099)和浙江省教育厅一般科研项目(No.Y201636639)资助。
Abstract: A novel one-dimensional structured (1D) TiO2-coated CdTe@C nanowires support for Au nanoparticles (CdTe@C@TiO2-Au) is synthesized for photocatalysis application. The structure and properties of the prepared photocatalysts are investigated by X-ray powder diffraction (XRD), scanning transmission electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and UV-Vis instruments (DRS). As an example of applications, the photodegradation of rhodamine B (RhB) is investigated under the simulated sunlight irradiation. It is found that the photocatalytic activities of these catalysts are 1D CdTe@C@TiO2-Au heteronanowires > CdTe@C@TiO2 nanowires > pure TiO2. Moreover, the degradation rates can reach 95.3% for CdTe@C@TiO2-Au with 270 min of irradiation time. This outcome is attributed to the localized surface plasmon resonance (LSPR) of Au nanoparticles largely enhanced visible light absorption, the efficient photogenerated electron separation of the prepared catalyst and CdTe@C nanowires photosensitized TiO2 structures.
Keywords: nanowires  noble metal  core-shell  photodegradation
投稿时间:2017-12-26 修订日期:2018-04-16
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陈素清,梁华定,金燕仙,沈茂.一维CdTe@C@TiO2-Au异质结纳米线的制备及其光催化性能[J].无机化学学报,2018,34(6):1149-1158.
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