UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

A microwave promoted continuous flow approach to self-assembled hierarchical hematite superstructures

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. Green open access

[thumbnail of accepted version.pdf]
Preview
Text
accepted version.pdf - Accepted version

Download (2MB) | Preview

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
Downloads since deposit
80Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item