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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Grano AJ, Sayler FM, Smatt JH, Bakker MG
Förläggare: ELSEVIER SCIENCE BV
Publiceringsår: 2013
Tidskrift: Materials Letters
Tidskriftsakronym: MATER LETT
Volym: 111
Artikelns första sida, sidnummer: 154
Artikelns sista sida, sidnummer: 157
Antal sidor: 4
ISSN: 0167-577X
eISSN: 1873-4979


Abstrakt

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.


Nyckelord

Monolith, Nanocasting, nickel

Senast uppdaterad 2019-14-12 vid 03:46