In situ observation of sintering of nickel nanoparticles during nanocasting into mesoporous silica

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Grano AJ, Sayler FM, Smatt JH, Bakker MG
Publisher: ELSEVIER SCIENCE BV
Publication year: 2013
Journal: Materials Letters
Journal acronym: MATER LETT
Volume number: 111
Start page: 154
End page: 157
Number of pages: 4
ISSN: 0167-577X
eISSN: 1873-4979


Abstract

Hierarchically porous metals are of interest in several application fields, including heterogeneous catalysis. Here, we report the nanocasting of nickel metal into hierarchically porous SBA-15 type monoliths containing ordered arrays of mesopores. Upon removal of the silica template, nickel replicas showed no evidence of an ordered mesopore structure. TEM images and XRD measurements of the nickel-silica composite show that nickel nanoparticles larger than the silica mesopores have formed. In situ heated stage TEM measurements indicate that sintering of nickel nanoparticles occurs, which leads to rapid disruption of the silica template in vacuum. This disruption appears to occur more rapidly in vacuum than under hydrogen atmosphere. (C) 2013 Elsevier B.V. All rights reserved.


Keywords

Monolith, Nanocasting, nickel

Last updated on 2019-15-11 at 04:53