Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting
(2017) In Journal of Materials Chemistry A 5(31). p.16189-16199- Abstract
Here, we present a new microwave-solvothermal method for the preparation of iron oxide nanostructures using deep eutectic solvents as a more sustainable reaction medium. By varying the synthesis temperature and solvent water fraction, the methodology offers control over iron oxide phase, size, and morphology, using efficient, rapid (10 minute) microwave heating. Synthesis with pure DES gives small (<5 nm) superparamagnetic samples of γ-Fe2O3 or α-Fe2O3, whereas hydrated DES yielded either nanoshards or large rhombohedral nanoparticles without the superparamagnetic response. Nanostructures were solution-cast onto F:SnO2 films. The photoelectrochemical response of the prepared... (More)
Here, we present a new microwave-solvothermal method for the preparation of iron oxide nanostructures using deep eutectic solvents as a more sustainable reaction medium. By varying the synthesis temperature and solvent water fraction, the methodology offers control over iron oxide phase, size, and morphology, using efficient, rapid (10 minute) microwave heating. Synthesis with pure DES gives small (<5 nm) superparamagnetic samples of γ-Fe2O3 or α-Fe2O3, whereas hydrated DES yielded either nanoshards or large rhombohedral nanoparticles without the superparamagnetic response. Nanostructures were solution-cast onto F:SnO2 films. The photoelectrochemical response of the prepared photoanodes was assessed, with a maximum measured photocurrent response of 0.7 mA cm-2 at 1.23 V vs. RHE. We measured the solvent structure using synchrotron WAXS, demonstrating the differences between the dry and hydrated solvent before and after heat-treatment, and showing that the hydrated solvent is remarkably resilient to extensive degradation.
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- author
- Hammond, Oliver S. ; Eslava, Salvador ; Smith, Andrew J. ; Zhang, Jifang and Edler, Karen J. LU
- publishing date
- 2017
- type
- Contribution to journal
- publication status
- published
- in
- Journal of Materials Chemistry A
- volume
- 5
- issue
- 31
- pages
- 11 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:85027134941
- ISSN
- 2050-7488
- DOI
- 10.1039/c7ta02078c
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2017 The Royal Society of Chemistry.
- id
- 21d61625-edc0-4c66-8f48-b6167ef32359
- date added to LUP
- 2023-01-18 09:14:26
- date last changed
- 2023-02-03 13:41:42
@article{21d61625-edc0-4c66-8f48-b6167ef32359, abstract = {{<p>Here, we present a new microwave-solvothermal method for the preparation of iron oxide nanostructures using deep eutectic solvents as a more sustainable reaction medium. By varying the synthesis temperature and solvent water fraction, the methodology offers control over iron oxide phase, size, and morphology, using efficient, rapid (10 minute) microwave heating. Synthesis with pure DES gives small (<5 nm) superparamagnetic samples of γ-Fe<sub>2</sub>O<sub>3</sub> or α-Fe<sub>2</sub>O<sub>3</sub>, whereas hydrated DES yielded either nanoshards or large rhombohedral nanoparticles without the superparamagnetic response. Nanostructures were solution-cast onto F:SnO<sub>2</sub> films. The photoelectrochemical response of the prepared photoanodes was assessed, with a maximum measured photocurrent response of 0.7 mA cm<sup>-2</sup> at 1.23 V vs. RHE. We measured the solvent structure using synchrotron WAXS, demonstrating the differences between the dry and hydrated solvent before and after heat-treatment, and showing that the hydrated solvent is remarkably resilient to extensive degradation.</p>}}, author = {{Hammond, Oliver S. and Eslava, Salvador and Smith, Andrew J. and Zhang, Jifang and Edler, Karen J.}}, issn = {{2050-7488}}, language = {{eng}}, number = {{31}}, pages = {{16189--16199}}, publisher = {{Royal Society of Chemistry}}, series = {{Journal of Materials Chemistry A}}, title = {{Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting}}, url = {{http://dx.doi.org/10.1039/c7ta02078c}}, doi = {{10.1039/c7ta02078c}}, volume = {{5}}, year = {{2017}}, }