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Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting


Reference:

Hammond, O. S., Eslava, S., Smith, A. J., Zhang, J. and Edler, K. J., 2017. Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting. Journal of Materials Chemistry A, 5 (31), pp. 16189-16199.

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Official URL:

https://doi.org/10.1039/C7TA02078C

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[thin space (1/6-em)]:[thin space (1/6-em)]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.

Details

Item Type Articles
CreatorsHammond, O. S., Eslava, S., Smith, A. J., Zhang, J. and Edler, K. J.
DOI10.1039/C7TA02078C
DepartmentsFaculty of Science > Chemistry
Faculty of Engineering & Design > Chemical Engineering
Research Centres & Institutes > Reaction and Catalysis Engineering research unit (RaCE)
Research CentresCentre for Sustainable Chemical Technologies
Centre for Advanced Separations Engineering (CASE)
Centre for Nanoscience and Nanotechnology
RefereedYes
StatusPublished
ID Code56030
Additional Informationopen access

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