Au nanoparticles supported on piranha etched halloysite nanotubes for highly efficient heterogeneous catalysis - Research portal of Justus Liebig University Giessen:

Journal article

Au nanoparticles supported on piranha etched halloysite nanotubes for highly efficient heterogeneous catalysis

Authors list: Yu, JY; Niedenthal, W; Smarsly, BM; Natile, MM; Huang, YX; Carraro, M

Publication year: 2021

Pages: 149100-

Journal: Applied Surface Science

Volume number: 546

ISSN: 0169-4332

eISSN: 1873-5584

DOI Link: https://doi.org/10.1016/j.apsusc.2021.149100

Publisher: Elsevier

Abstract:
Halloysite nanotubes (HNTs) can be conveniently used as scaffolds to load catalytic units, to enable efficient heterogeneous catalytic processes. In this contribution, we report a facile strategy to prepare a composite system based on Au nanoparticles (NPs) supported on piranha-etched HNTs. The resulting nano-system was characterized by FTIR, XPS and nitrogen physisorption to highlight its surface properties and porosity. Compared to the non-treated reference HNTs, the increase of hydroxyl groups on the etched HNTs walls allowed to graft a double amount of 3-aminopropyl silane (5.7 wt% vs. 2.8 wt%) and, consequently, to load 15.5 wt% more gold NPs. On the other hand, the interaction of the amino groups with Au NPs stabilizes positively charged NPs, thus leading to excellent catalytic activity and stability. The resulting nano-hybrid can catalyse the reduction of 4-nitrophenol to 4-aminophenol with a kinetic rate constant 53% higher than the reference reaction. In addition, it can be reused for 8 times without significant loss of activity. The supported system also demonstrates its potential in the oxidation of a sugar-derived molecule, i.e., furfural, which is converted into furoic acid with turnover frequency (TOF) 25% higher than the reference.

Authors/Editors

- Uni.-Prof. Dr. Bernd Michael Smarsly

Citation Styles

Harvard Citation style: Yu, J., Niedenthal, W., Smarsly, B., Natile, M., Huang, Y. and Carraro, M. (2021) Au nanoparticles supported on piranha etched halloysite nanotubes for highly efficient heterogeneous catalysis, Applied Surface Science, 546, Article 149100. p. 149100. https://doi.org/10.1016/j.apsusc.2021.149100

APA Citation style: Yu, J., Niedenthal, W., Smarsly, B., Natile, M., Huang, Y., & Carraro, M. (2021). Au nanoparticles supported on piranha etched halloysite nanotubes for highly efficient heterogeneous catalysis. Applied Surface Science. 546, Article 149100, 149100. https://doi.org/10.1016/j.apsusc.2021.149100