Bayazit, MK;
Cao, E;
Gavriilidis, A;
Tang, J;
(2016)
A microwave promoted continuous flow approach to self-assembled hierarchical hematite superstructures.
Green Chemistry
, 18
(10)
pp. 3057-3065.
10.1039/C5GC02245B.
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Abstract
In this work, a microwave promoted flow (MWPF) system to reproducibly synthesize self-assembled hierarchical hematite superstructures (Hem-SSs) using the sole precursor (Fe(NO3)3·9H2O) and single mode microwave under aqueous conditions was developed. The functional characterisation by XRD, (HR)TEM, XPS, UV-vis and Raman spectroscopy proved that highly crystalline ellipsoid Hem-SSs (∼180 nm × 140 nm) were produced, built from primary hematite nanoparticles, 5–10 nm in size using 0.05 mol L−1 precursor concentration, 1 mL min−1 flow rate and short reaction time (about 6 min). Particles produced via conventional heating (CH) at 120 and 140 °C in the same flow reactor under similar experimental conditions were found to consist of mixtures of goethite and hematite. The effects of precursor concentration (0.1 and 0.2 mol L−1) and flow rate (2 and 5 mL min−1) were further investigated and the synthesis mechanism was also discussed. This novel method opens a window for continuous fabrication of metal or metal oxide nanoparticles/superstructures by a green approach.
| Type: | Article |
|---|---|
| Title: | A microwave promoted continuous flow approach to self-assembled hierarchical hematite superstructures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/C5GC02245B |
| Publisher version: | http://dx.doi.org/10.1039/C5GC02245B |
| Language: | English |
| Additional information: | Copyright © The Royal Society of Chemistry, 2016. This is the accepted version of the article published in Green Chemistry; the published version can be found on the journal website at http://dx.doi.org/10.1039/C5GC02245B |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1478258 |
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