CdS纳米粒子/层状硅酸盐复合物的合成及光学性质的研究  

Synthesis and optical property of composites based on CdS nanopartices incorporated in Na-octosilicate

作　　者：鲍垚 王肖庆 陈玉凤[1] 

机构地区：[1]南昌大学化学系,江西南昌330031

出　　处：《南昌大学学报（工科版）》2015年第4期318-326,共9页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51162021)

摘　　要：通过离子交换和后续S2-的引入将CdS纳米粒子引入到层状硅酸盐（Na-Octosilicate）中以形成CdS/Octosilicate复合物。粉末X射线衍射表明,CdS/Octosilicate复合物保持主体层状硅酸盐的结构。CdS/Octosilicate复合物的组分分析基于ICP-AES、SEM-EDX、CHN元素以及热重TG结果。光致发光光谱（PL）表明：当CdS纳米粒子引入到主体层状硅酸盐中后,CdS中的550 nm峰位明显向高能方向移动（移至528 nm）;紫外-可见散射谱（UV-vis）表明,随着层状硅酸盐中CdS含量的增加,复合物的能带边从高能移向低能;透射电子显微镜（TEM）观测证实,硅酸盐主体层中CdS纳米粒子的尺寸为3-5 nm,而且随着主体硅酸盐中CdS纳米粒子数量的增加,CdS纳米粒子趋于团聚。这些结果表明,CdS的光学性能能够被层状硅酸盐Octosilicate修饰。The composites based on CdS nanoparticles incorporated in host layered Na-octosilicate has been developed by ion-exchange and introduction of S2-ions. Powder X-ray diffraction（ XRD） results indicated that the composites remained the structures of the precursor Na-octosilicate or H-octosilicate. The chemical compositions of samples were estimated by inductively coupled plasma atomic emission spectroscopy（ ICP-AES）,scanning electron microscope equipped with energy dispersive X-ray analysis（ SEM-EDX）,CHN elemental analysis,and thermogravimetric analysis（ TG）. Photoluminescent（ PL） spectra showed that the peak at 550 nm represented in CdS particles markedly shifted to high energy（ 528 nm） after CdS particles were incorporated in host Na-octosilicate. Meanwhile,UV-vis diffuse spectra suggested that the band-edges of the compopsites shifted to low energy from high energy with increasing amount of CdS in the Na-octosilicate. TEM observation confirmed that the sizes of CdS particles incorporated in host silicate were 3- 5 nm,and the CdS nanoparticles tended to aggregate with increasing of CdS in the host silicate. These results indicated that the optical property of CdS could be modified by layered silicate Na-octosilicate.

关 键 词：层状硅酸 CDS 光致发光 复合材料 离子交换 

分 类 号：TQ170[化学工程—硅酸盐工业]