Issue 57, 2017, Issue in Progress

Evolution analysis of V2O5·nH2O gels for preparation of xerogels having a high specific surface area and their replicas

Abstract

The evolution of a V2O5·nH2O gel skeleton through the hydration of vanadium alkoxide was monitored using ex situ and in situ transmission electron microscopy and X-ray diffractometry. We successfully observed the morphological evolution of the gel skeleton by vacuum drying after replacing the pore liquid of acetone with cyclohexane. The gel skeleton comprised of nanofibers 10–20 nm wide and over 300 nm long was formed from ultrathin films 1–3 nm thick through thin fibrils 3–7 nm wide and about 100 nm long. Fixation of the thin fibrils by a simple vacuum-drying technique provided xerogels having a specific surface area as high as ∼320 m2 g−1 at ambient temperature. Highly porous polypyrrole frameworks were obtained as replicas of the V2O5·nH2O xerogels.

Graphical abstract: Evolution analysis of V2O5·nH2O gels for preparation of xerogels having a high specific surface area and their replicas

Supplementary files

Article information

Article type
Paper
Submitted
20 Jun 2017
Accepted
12 Jul 2017
First published
19 Jul 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 35711-35716

Evolution analysis of V2O5·nH2O gels for preparation of xerogels having a high specific surface area and their replicas

K. Ishii, Y. Kimura, T. Yamazaki, Y. Oaki and H. Imai, RSC Adv., 2017, 7, 35711 DOI: 10.1039/C7RA06850F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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