Coal Waste to Two-Dimensional Materials

Fabrication of α-Fe2O3 Nanosheets and MgO Nanosheets from Brown Coal Fly Ash

Binbin Qian, Tahereh Hosseini, Xiwang Zhang, Yue Liu, Huanting Wang, Lian Zhang

Research output: Contribution to journalArticleResearchpeer-review

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.

Original languageEnglish
Pages (from-to)15982-15987
Number of pages6
JournalACS Sustainable Chemistry & Engineering
Volume6
Issue number12
DOIs
Publication statusPublished - 3 Dec 2018

Keywords

  • Brown coal fly ash
  • Hydrothermal treatment
  • Multistep acid leaching
  • Nanosheet
  • Waste utilization

Cite this

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title = "Coal Waste to Two-Dimensional Materials: Fabrication of α-Fe2O3 Nanosheets and MgO Nanosheets from Brown Coal Fly Ash",
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.",
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author = "Binbin Qian and Tahereh Hosseini and Xiwang Zhang and Yue Liu and Huanting Wang and Lian Zhang",
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month = "12",
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Coal Waste to Two-Dimensional Materials : Fabrication of α-Fe2O3 Nanosheets and MgO Nanosheets from Brown Coal Fly Ash. / Qian, Binbin; Hosseini, Tahereh; Zhang, Xiwang; Liu, Yue; Wang, Huanting; Zhang, Lian.

In: ACS Sustainable Chemistry & Engineering, Vol. 6, No. 12, 03.12.2018, p. 15982-15987.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Coal Waste to Two-Dimensional Materials

T2 - Fabrication of α-Fe2O3 Nanosheets and MgO Nanosheets from Brown Coal Fly Ash

AU - Qian, Binbin

AU - Hosseini, Tahereh

AU - Zhang, Xiwang

AU - Liu, Yue

AU - Wang, Huanting

AU - Zhang, Lian

PY - 2018/12/3

Y1 - 2018/12/3

N2 - 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.

AB - 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.

KW - Brown coal fly ash

KW - Hydrothermal treatment

KW - Multistep acid leaching

KW - Nanosheet

KW - Waste utilization

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