【摘 要】
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We presented an environmentally friendly approach for the immobilization of high-density silver nanoparticles (Ag NPs) on the negatively charged surface of
【机 构】
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武汉大学化学与分子科学学院,武汉430072
【出 处】
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第九届全国高聚物分子与结构表征学术讨论会
论文部分内容阅读
We presented an environmentally friendly approach for the immobilization of high-density silver nanoparticles (Ag NPs) on the negatively charged surface of alginate (AL) microspheres.Quaternized cellulose (QC)-Ag nanocomposites are subsequently deposited onto the surface of AL microspheres through the electrostatic interaction between QC and AL.The density ofAg NPs immobilized on the surface of AL microspheres could be altered by varying the Ag content in QC-Ag nanocomposites.Optical microscope, XRD, XPS, TG, SEM and TEM were employed to follow all preparation steps and to characterize the resulting functional surfaces.The catalytic activity of the composite microspheres was evaluated by the reduction of p-nitrophenol to p-aminophenol by NaBH4.The results demonstrated that the obtained microspheres exhibited excellent catalytic activity with a high reaction constant of 2.75 min-1.This was a significant enhancement compared to other Ag catalysts reported in the literature.
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