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Type: Journal article
Title: Coal waste to two-dimensional materials: fabrication of α-Fe₂O₃ nanosheets and MgO nanosheets from brown coal fly ash
Other Titles: Coal waste to two-dimensional materials: fabrication of alpha-Fe(2)O(3) nanosheets and MgO nanosheets from brown coal fly ash
Author: Qian, B.
Hosseini, T.
Zhang, X.
Liu, Y.
Wang, H.
Zhang, L.
Citation: ACS Sustainable Chemistry and Engineering, 2018; 6(12):15982-15987
Publisher: ACS Publications
Issue Date: 2018
ISSN: 2168-0485
Statement of
Binbin Qian, Tahereh Hosseini, Xiwang Zhang, Yue Liu, Huanting Wang, Lian Zhang
Abstract: High-purity 2-D α-Fe2O3 nanosheets and MgO nanosheets have been successfully fabricated with a high extraction yield of 45 and 25 wt %, respectively, from a brown coal fly ash, an otherwise valueless waste. A two-stage counter-current solid–liquid extraction method was first employed under the mild conditions of 25–60 °C and atmospheric pressure to selectively extract Fe3+ and Mg2+, which were then precipitated out separately upon gradual addition of NaOH and subsequent hydrothermal treatment. Finally, 2-D nanosized α-Fe2O3 nanosheet was obtained with a lamellar morphology, while the synthesized Mg(OH)2 precursor undertook an extra multistep calcination to convert into the respective 2-D MgO nanosheet.
Keywords: Brown coal fly ash; Waste utilization; Multistep acid leaching; Hydrothermal treatment; Nanosheet
Rights: © 2018 American Chemical Society.
DOI: 10.1021/acssuschemeng.8b03952
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Chemical Engineering publications

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