Habibi Mohammad Hossein, Rahmati Mohammad Hossein
Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441 IR, Islamic Republic of Iran.
Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441 IR, Islamic Republic of Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Dec 10;133:13-8. doi: 10.1016/j.saa.2014.04.110. Epub 2014 May 16.
ZnO@CdS core-shell nano-structure has been synthesized using zinc acetate dihydrate, and cadmium acetate dihydrate as simple precursors in a water-ethanol matrix without using any surfactant, ligand or chelating agents. The effect of different concentrations of cadmium acetate and sodium sulfide on optical and electronic properties of ZnO@CdS core-shell was investigated. The morphology and structure of the ZnO@CdS core-shell nano-structures have been confirmed by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) measurements. The results showed that the ZnO@CdS core-shell nano-structure is mixed cubic and hexagonal structures. FESEM results showed the mono-dispersed and uniform size of 39nm. Optical properties were studied by UV-visible diffuse reflectance spectroscopy (DRS) technique and the results showed that band gaps of ZnO@CdS core-shell nanocomposites were red shifted by increasing the cadmium concentration. FTIR spectrum of ZnO@CdS core-shell nano-structure showed a band at 482cm(-1) correlated to ZnO bond and a band at 630cm(-1) due to the stretching frequency of CdS bond.
已使用二水合醋酸锌和二水合醋酸镉作为简单前驱体，在水 - 乙醇基质中不使用任何表面活性剂、配体或螯合剂的情况下合成了ZnO@CdS核壳纳米结构。研究了不同浓度的醋酸镉和硫化钠对ZnO@CdS核壳光学和电子性质的影响。通过场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）测量证实了ZnO@CdS核壳纳米结构的形态和结构。结果表明，ZnO@CdS核壳纳米结构为立方和六方混合结构。FESEM结果显示其单分散且尺寸均匀，为39nm。通过紫外 - 可见漫反射光谱（DRS）技术研究了光学性质，结果表明，随着镉浓度的增加，ZnO@CdS核壳纳米复合材料的带隙发生红移。ZnO@CdS核壳纳米结构的FTIR光谱显示在482cm(-1)处有一个与ZnO键相关的峰，以及在630cm(-1)处有一个由于CdS键的拉伸频率而产生的峰。
