Morphology/facet-dependent photo-Fenton-like degradation of pharmaceuticals and personal care products over hematite nanocrystals

Abstract

Hematite (α-Fe2O3) with different shapes and preferentially exposed facets may differ in surface energy and atomic configuration resulting in versatile catalysis. Herein, four morphologies of α-Fe2O3 nanocrystals, e.g. cuboid/rhombohedral, spheroid, rice-like, and plate-like are synthesised by hydrothermal/solvothermal routes. The correlation between morphology and photochemical performance is established by investigating the photo-Fenton-like degradation of p-hydroxybenzoic acid (p-HBA) and sulfachloropyridazine (SCP). The plate-like sample demonstrates the highest removal efficiency, whereas the normalised reaction rate by specific surface area shows the reaction order as cuboid/rhombohedral > plate-like > spheroid > rice-like. This can be ascribed to the synergistic role of the surface atomic arrangement and specific surface area. The main reactive species and degradation pathways were studied in detail. The research findings may offer new insights into the morphology/facet-dependent photochemical remediation of emerging contaminants (ECs) on α-Fe2O3.

RAS ID

52122

Document Type

Journal Article

Date of Publication

3-15-2022

Volume

432

Funding Information

Australian Research Council

School

School of Engineering

Grant Number

ARC Number : DP190103548

Copyright

subscription content

Publisher

Elsevier

Comments

Asif, A. H., Rafique, N., Hirani, R. A. K., Wu, H., Shi, L., Zhang, S., ... & Sun, H. (2022). Morphology/facet-dependent photo-Fenton-like degradation of pharmaceuticals and personal care products over hematite nanocrystals. Chemical Engineering Journal, 432, 134429.

https://doi.org/10.1016/j.cej.2021.134429

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Link to publisher version (DOI)

10.1016/j.cej.2021.134429