聚丙烯酸模板制备PAA/PbCrO_4复合纳米颗粒  

Fabrication of PAA/PbCrO_4 composite nanoparticles by PAA template method

作　　者：郑雪琳[1,2] 翁家宝[1,2] 吕习周[1] 孟东利[1] 黄志彬[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007 [2]福建省高分子材料重点实验室,福建福州350007

出　　处：《吉林化工学院学报》2011年第1期5-7,共3页Journal of Jilin Institute of Chemical Technology

基　　金：国家自然科学基金资助项目(20874012);福建省自然科学基金资助项目(2010J05018);福建省教育厅资助项目(JA09049)

摘　　要：以低分子量聚丙烯酸（PAA）为高分子模板构建自组装体系,合成核-壳结构的PAA/PbCrO4纳米颗粒.通过TEM、XRD、FT-IR、UV-vis、荧光光谱等表征手段对产物的结构、形貌与光学性能进行研究.结果表明：PAA通过羧基与Pb2＋的配位作用包覆在PbCrO4纳米颗粒表面,形成核-壳结构,内核PbCrO4尺寸为50~100 nm,为单斜晶系;外壳PAA层厚20 nm.与普通PbCrO4体相材料相比,产物在829~854 cm-1红外吸收峰变宽,紫外与荧光光谱产生了＂蓝移＂,表现出纳米粒子所具有的特殊光学现象.PAA/PbCrO4 composite nanoparticles with core-shell structure were successfully synthesized by using polyacrylic acid as the template.The products were characterized by TEM,XRD,FT-IR,UV-vis and fluorescence spectroscopy.The results indicated that PAA was modified on the surface of PbCrO4 nanoparticles to form ＂core-shell＂ structure through the coordination between the carboxyl and Pb2＋.The thickness of polymer shells was around 20nm and the PbCrO4 core was monoclinic structure with a grain size of 50~100nm.The IR absorption peak widens in the range from 829cm-1 to 854cm-1,the UV-vis spectra and fluorescent emission peak have also obvious blue-shift compared to that of bulk materials as a result of quantum size effect.

关 键 词：聚丙烯酸 模板 铬酸铅 复合纳米颗粒 

分 类 号：O648[理学—物理化学]