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@ARTICLE{Khodan:916426,
author = {Khodan, Anatole and Kanaev, Andrei and Esaulkov, Mikhail
and Kiselev, Mikhail and Nadtochenko, Victor},
title = {{E}ffects of {S}urface {C}hemical {M}odification by
{E}thoxysilanes on the {E}volution of 3{D} {S}tructure and
{C}omposition of {P}orous {M}onoliths {C}onsisting of
{A}lumina {H}ydroxide {N}anofibrils in the {T}emperature
{R}ange 25–1700 °{C}},
journal = {Nanomaterials},
volume = {12},
number = {20},
issn = {2079-4991},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2022-06226},
pages = {3591 -},
year = {2022},
abstract = {Bulk nanomaterials with an open porosity offer exciting
prospects for creating new functional materials for various
applications in photonics, IR-THz optics, metamaterials,
heterogeneous photocatalysis, monitoring and cleaning toxic
impurities in the environment. However, their availability
is limited by the complexity of controlling the process of
synthesis of bulk 3D nanostructures with desired
physicochemical and functional properties. In this paper, we
performed a detailed analysis of influence of a silica
monolayer chemically deposited on the surface of a
monolithic ultraporous nanostructure, consisting of a 3D
nanofibril network of aluminum oxyhydroxide, on the
evolution of structure and morphology, chemical composition
and phase transformations after heat treatment in the
temperature range of 20−1700 °C. The experimental results
are interpreted in the framework of a physical model taking
into account surface and volume mass transport and sintering
kinetics of nanofibrils, which made it possible to estimate
activation energies of the surface diffusion and sintering
processes. It is shown that the presence of a surface silica
monolayer on the surface affects the kinetics of aluminum
oxyhydroxide dehydration and inhibits diffusion mass
transfer and structural phase transformations. As a result,
the overall evolution of the 3D nanostructure significantly
differs from that of nanomaterials without surface chemical
modification.},
cin = {JCNS-4 / JCNS-FRM-II / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-4-20201012 /
I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4)},
pid = {G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-MLZ)KWS3-20140101 / EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {36296780},
UT = {WOS:000875933400001},
doi = {10.3390/nano12203591},
url = {https://juser.fz-juelich.de/record/916426},
}