In:
Physical Chemistry Chemical Physics, Royal Society of Chemistry (RSC), Vol. 24, No. 46 ( 2022), p. 28333-28342
Abstract:
In microwave-assisted solvothermal synthesis (MASS) of nanocrystalline iron oxides, we have analysed chemical pathways to explore the role played by the temperature and heating rate in deciding the phases and crystallographic orientations. We have achieved control over synthesis parameters by using tailored mixtures of solvents. These kinetically controlled pathways are engineered by suitably mixing high microwave dielectric loss solvents – ethanol and water, with 1-decanol. We propose two new pathways, and combinations of different pathways, to explain the observed phases in reactions between metal acetylacetonates and these solvents, using Fe(acac) 3 as a representative. The proposed pathways also explain the changes in the local geometry from octahedral to square pyramidal, enroute to tetrahedral in oxides. Mixing solvents to alter tan δ is shown to provide an energy-efficient way to control the specific geometry of grown phases. The results demonstrate new ways of analysing and tuning the synthesis of complex oxides in pure and mixed solvents, under microwave irradiation.
Type of Medium:
Online Resource
ISSN:
1463-9076
,
1463-9084
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
1476283-3
detail.hit.zdb_id:
1476244-4
detail.hit.zdb_id:
1460656-2
Permalink
