CAJ | 학술논문

通过离子交换和沉淀反应制备纳米复合材料CdS/TiO2NTs.采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、漫反射紫外-可见吸收光谱(DRUVAS)、荧光光谱(FES)、X射线荧光分析(XRF)等手段对该复合材料的结构进行表征.SEM结果表明:钛酸盐纳米管的形成经由TiO2颗粒-片状的钛酸盐-卷曲的钛酸盐纳米管的自组装过程.XRD、DRUVAS、FES和FES结果表明:平均粒度大约 8 nm 的六方相CdS均匀的负载于锐钛矿型TiO2纳米管表面,其吸收边扩展到可见区.与TiO2纳米管及TiO2粉末相比,CdS/TiO2NTs 纳米复合材料展示了较高的可见光催化分解水产氢活性.
통과리자교환화침정반응제비납미복합재료CdS/TiO2NTs.채용X사선연사(XRD)、소묘전경(SEM)、투사전경(TEM)、만반사자외-가견흡수광보(DRUVAS)、형광광보(FES)、X사선형광분석(XRF)등수단대해복합재료적결구진행표정.SEM결과표명:태산염납미관적형성경유TiO2과립-편상적태산염-권곡적태산염납미관적자조장과정.XRD、DRUVAS、FES화FES결과표명:평균립도대약 8 nm 적륙방상CdS균균적부재우예태광형TiO2납미관표면,기흡수변확전도가견구.여TiO2납미관급TiO2분말상비,CdS/TiO2NTs 납미복합재료전시료교고적가견광최화분해수산경활성.
The CdS/TiO2NTs nanocomposite was prepared through ion-exchange and precipitation reactions. The nanostructure properties of the composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance UV-visible absorption spectra (DRUVAS), fluorescence emission spectra (FES) and X-ray fluorescence analyzer (XRF). SEM results revealed that the lamellar sodium trititanate originating from the TiO2 particles in-dividually curled to form the sodium trititanate nanotubes by self-assembled mechanism. The results of XRD, TEM and DRUVAS demonstrated that hexagonal phase CdS with about 8 nm particle size were homogeneously loaded on the surface of anatase TiO2NTs and the absorption edge of the composite was extended to the visible region. The CdS/TiO2NTs composite exhibited the highest activity of hydrogen production (1708 ?L/g) by photocatalytic water decomposition in comparison with TiO2NTs and TiO2 powder under visible light irradiation (x> 400 nm) for 6 h.