ABSTRACT

Proanthocyanidins-functionalized Au/Ag bimetallic nanoparticles were synthesized by a hydrothermal method. The obtained Au/Ag nanoparticles have been characterized by UV-Vis absorption spectra (UV), Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM) and X-ray diffraction (XRD). The UV and FTIR measurement indicated that the as-synthesized colloids have the spherical shapes and the presence of the polymerized proanthocyanidins around metal nanoparticles. TEM and XRD results revealed that the nanoparticles have uniform core-shell structures and the metal core possessed a highly crystalline structure. Furthermore, it was found that the proanthocyanidins-functionalized Au/Ag bimetallic nanoparticles have high removal efficiency for some organic dyes.

摘要

通过水热法合成原花青素官能化的Au / Ag双金属纳米颗粒。通过UV-Vis吸收光谱（UV），傅立叶变换红外光谱（FTIR），透射电子显微镜（TEM）和X射线衍射（XRD）对获得的Au / Ag纳米颗粒进行了表征。UV和FTIR测量表明合成后的胶体具有球形形状，并且在金属纳米颗粒周围存在聚合的原花色素。TEM和XRD结果表明，纳米粒子具有均匀的核-壳结构，金属核具有高度结晶的结构。此外，发现原花青素官能化的Au / Ag双金属纳米颗粒具有对某些有机染料的高去除效率。