Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 16189-16199 |
| Journal | Journal of Materials Chemistry A |
| Volume | 5 |
| Issue number | 31 |
| DOIs | |
| Publication status | Published - 5 Jun 2017 |
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Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting. / Hammond, Oliver S.; Eslava, Salvador; Smith, Andrew J.; Zhang, Jifang; Edler, Karen J.
In: Journal of Materials Chemistry A, Vol. 5, No. 31, 05.06.2017, p. 16189-16199.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting
AU - Hammond, Oliver S.
AU - Eslava, Salvador
AU - Smith, Andrew J.
AU - Zhang, Jifang
AU - Edler, Karen J.
PY - 2017/6/5
Y1 - 2017/6/5
N2 - 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.
AB - 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.
UR - https://doi.org/10.1039/C7TA02078C
U2 - 10.1039/C7TA02078C
DO - 10.1039/C7TA02078C
M3 - Article
VL - 5
SP - 16189
EP - 16199
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 31
ER -