A Comparison Study of Functional Groups (Amine vs. Thiol) for Immobilizing AuNPs on Zeolite Surface
| Autor: | Cédric Guyon, Ali Abou Hassan, Michael Tatoulian, Chenglin Chu, Xi Rao, Stéphanie Ognier |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Diffuse reflectance infrared fourier transform functional group General Chemical Engineering AuNPs Article lcsh:Chemistry chemistry.chemical_compound lcsh:QD1-999 chemistry X-ray photoelectron spectroscopy Colloidal gold Triethoxysilane immobilization Thiol Zeta potential General Materials Science zeolite Zeolite Wet chemistry Nuclear chemistry |
| Zdroj: | Nanomaterials Volume 9 Issue 7 Nanomaterials, Vol 9, Iss 7, p 1034 (2019) |
| ISSN: | 2079-4991 |
| Popis: | Immobilization of gold nanoparticles (AuNPs) on the surface of zeolite has received a great interest due to Au@zeolite&rsquo 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. |
| Databáze: | OpenAIRE |
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