用于将金纳米粒子固定在沸石表面的官能团（胺基与硫醇）的比较研究。
A Comparison Study of Functional Groups (Amine vs. Thiol) for Immobilizing AuNPs on Zeolite Surface.
作者信息
Rao Xi, Tatoulian Michaël, Guyon Cédric, Ognier Stephanie, Chu Chenglin, Abou Hassan Ali
机构信息
Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Materials and Energy, Southwest University, Chongqing 400715, China.
Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France.
出版信息
Nanomaterials (Basel). 2019 Jul 19;9(7):1034. doi: 10.3390/nano9071034.
Immobilization of gold nanoparticles (AuNPs) on the surface of zeolite has received a great interest due to Au@zeolite's unique characteristics and high performance for catalysis. In this work we studied the grafting of two different functional molecules; one having an amine group (3-aminopropyl)triethoxysilane (APTES) and the second having a thiol group (3-mercaptopropyl)trimethoxysilane (MPTES) on the surface of zeolite using the same wet chemistry method. The modified zeolite surfaces were characterized using zeta potential measurements; diffuse reflectance infrared fourier transform (DRIFT) and X-ray photoelectron spectroscopy (XPS). The results confirmed a successful deposition of both functional groups at the topmost surface of the zeolite. Furthermore; transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy and XPS results clearly evidenced that APTES provided a better AuNPs immobilization than MPTES as a result of; (1) less active functions obtained after MPTES deposition, and (2) the better attaching ability of thiol to the gold surface.
由于金@沸石具有独特的特性和高效的催化性能，将金纳米颗粒（AuNPs）固定在沸石表面引起了广泛关注。在这项工作中，我们研究了两种不同功能分子的接枝；一种具有胺基（3-氨丙基）三乙氧基硅烷（APTES），另一种具有硫醇基（3-巯丙基）三甲氧基硅烷（MPTES），采用相同的湿化学方法将它们接枝到沸石表面。使用zeta电位测量、漫反射红外傅里叶变换（DRIFT）和X射线光电子能谱（XPS）对改性沸石表面进行了表征。结果证实了两种官能团都成功沉积在沸石的最表面。此外，透射电子显微镜（TEM）、紫外可见（UV-Vis）光谱和XPS结果清楚地表明，由于以下原因，APTES比MPTES提供了更好的AuNPs固定效果：（1）MPTES沉积后获得的活性官能团较少，（2）硫醇对金表面的附着能力更强。
Zotero 插件