原位复合制备纤维素基CdS纳米复合材料及其表征  

Preparation and characterization of cellulose/CdS nanocomposites

作　　者：唐爱民[1] 钱荣敬[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《功能材料》2010年第11期2034-2037,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50373013;50573022);国家重点基础研究发展计划(973计划)资助项目(2010CB732206)

摘　　要：以微晶纤维素(MCC)为模板,氯化镉、硫化钠等为原料,在水的悬浮液中,用原位复合法制备了MCC/CdS纳米复合材料。对复合反应条件进行了初步研究,探讨了Cd2+浓度、Cd2+吸附时间及超声功率对复合反应的影响。研究表明,适当提高Cd2+吸附时间及超声功率有利于提高复合材料中硫化镉颗粒的复合量,Cd2+浓度对复合量的影响是显著的。应用X射线衍射(XRD),扫描电镜(SEM),红外光谱(FT-IR),光致荧光光谱(PL)对MCC/CdS复合材料进行了表征。结果表明,复合在微晶纤维素上的CdS颗粒大小均一,且均匀分布在微晶纤维素模板表面;制备的复合材料具有一定的荧光特性。Nanocomposites of cadmium sulfide and microcrystalline cellulose（CdS/MCC）have been prepared from an aqueous solution of cadmium chloride and sodium sulfide by in-situ process using microcrystalline cellulose as substrate material.The influences of compounding conditions on the composition results were studied.The amount of the compounded cadmium sulfide particles depends on the composition conditions,such as Cd^2＋ concentration,Cd^2＋ absorbing time,and ultrasonic powers.It is indicated that the content of compounded cadmium sulfide particles can be improved by property increase Cd^2＋ absorbing time and ultrasonic powers.The influences of Cd^2＋ concentration is significant.The structure and the properties of the composite（MCC/CdS）obtained were investigated by means of X-ray diffraction（XRD）,scanning electron microscope（SEM）,fourier transformed infrared（FTIR）and photoluminescence（PL）spectrum.According to SEM images,the obtained CdS particles evenly distributed on the surface of microcrystalline cellulose.The PL spectrum of the CdS/MCC composite particles displayed peaks range from 510nm to 540nm with exited wavelength at 420nm.

关 键 词：微晶纤维素 硫化镉 原位复合 纳米复合材料 

分 类 号：TS761.2[轻工技术与工程—制浆造纸工程]