Accelerated microwave assisted synthesis of alumino-germanate imogolite nanotubes - Sorbonne Université Access content directly
Journal Articles RSC Advances Year : 2016

Accelerated microwave assisted synthesis of alumino-germanate imogolite nanotubes

Abstract

Ge-imogolite nanotubes (Al2GeO7H4) can be readily obtained in various lengths, chemical compositions and crystallinities, opening up new perspectives for applications. Their classical synthesis includes the nucleation of roof-tile shaped precursors at room temperature followed by heat promoted growth (typically 95°C) for at least 4 to 7 days. To circumvent this excessively long synthesis duration, we used microwave assisted heating to accelerate the growth. Micron sized tubes were formed from 1hr at 100°C, and best results were obtained for 2 hours at 200°C, i.e approximately 100 fold faster when compared to the conventional heating process. Additionally, tube lengths were shifted towards larger values by one order of magnitude, leading to micron sized Ge-imogolites vs. 100 nm with conventional heating. Specific microwave effects as well as mechanisms leading to these longer tubes are also discussed.
Fichier principal
Vignette du fichier
Avellan_2016_Accelerated.pdf (565.57 Ko) Télécharger le fichier
SI_RSC.pdf (736.21 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Origin Files produced by the author(s)

Dates and versions

hal-01430836 , version 1 (10-01-2017)

Identifiers

Cite

A. Avellan, C. Levard, Corinne Chaneac, D. Borschneck, Francis R.A. Onofri, et al.. Accelerated microwave assisted synthesis of alumino-germanate imogolite nanotubes. RSC Advances, 2016, 6 (109), pp.108146 - 108150. ⟨10.1039/C6RA19275K⟩. ⟨hal-01430836⟩
435 View
277 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More