Cited by 40Iron oxide chemistry and applicationsEnvironmental remediation with nanomaterialsAdsorption and biosorption for pollutant removal

Hierarchically three-dimensional (3D) nanotubular sea urchin-shaped iron oxide and its application in heavy metal removal and solar-induced photocatalytic degradation

Lee, Soon Chang, Jeong, Yesul, Kim, Youn Jung, Kim, Hyeran, Lee, Hyun Uk, Lee, Young-Chul, Lee, Sang Moon, Kim, Hae Jin +5 more·2018·Journal of Hazardous Materials

Abstract

In this study, hierarchically three-dimensional (3D) nanotubular sea urchin-shaped iron oxide nanostructures (3D-Fe 2 O 3) were synthesized by a facile and rapid ultrasound irradiation method. Additives, templates, inert gas atmosphere, pH regulation, and other complicated procedures were not required. Dense 3D-Fe 2 O 3 with a relatively large Brunauer-Emmett-Teller (BET) surface area of 129.4 m 2/g was synthesized within 23 min, and the BET surface area was further improved to 282.7 m 2/g by a post heat-treatment process. In addition, this post processing led to phase changes from maghemite (γ phase) to hematite (α phase) Fe 2 O 3. Subsequent characterization suggested that the growth mechanism of the 3D-Fe 2 O 3 follows self-assembly and oriented attachment. The prepared 3D-Fe 2 O 3 was applied to wastewater purification. Ultrasound-irradiated 3D-Fe 2 O 3 can eliminate a As(V) and Cr(VI) from water with 25 times faster removal rate by using a one third smaller amount than commercial α-Fe 2 O 3. This was attributed to the inter-particle pores and relatively positively charged surface of the nanostructure. In addition, post heat treatment on ultrasound-irradiated 3D-Fe 2 O 3 significantly influenced the photocatalytic degradation of methylene blue and phenol, with a 25 times higher removal efficiency than that of commercial α-Fe 2 O 3, because of both high BET surface area and good crystallization of the prepared samples.

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Crossref · 10.1016/j.jhazmat.2018.04.048

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  • In an aqueous solution containing As5+ and Cr6+ at 0.10 mg/L, a synthesized 3D-Fe2O3 achieved nearly 100% removal rates using solar light irradiation and photocatalytic activity.

    “In an aqueous solution containing As 5+ and Cr 6+ (concentration of 0.10 mg/L), a synthesized 3D-Fe 2 O 3 was used to achieve nearly 100% removal rates using solar light irradiation and photocatalytic activity 128 .”

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Authors
Lee, S. C., Jeong, Y., Kim, Y. J., Kim, H., Lee, H. U., Lee, Y.-C., Lee, S. M., Kim, H. J., An, H.-R., Ha, M. G., Lee, G.-W., Lee, Y.-S., & Lee, G.
Affiliations
  • Chungnam National University (KR)
  • Korea Basic Science Institute (KR)
  • Gyeongkuk National University (KR)
  • Gachon University (KR)
  • Korea Institute of Energy Research (KR)
Corresponding author
  • Lee, Soon Chang
  • Lee, Hyun Uk
  • Lee, Young-Chul
  • Lee, Sang Moon
  • Lee, Go-Woon
  • Lee, Young-Seak
  • Lee, Gaehang
Venue
Journal of Hazardous Materials
Publisher
Elsevier BV
Published
2018-07
Volume
354
Pages
283-292
ISSN
0304-3894 (ISSN-L)
OpenAlex
W2799587265
Cited by
40
References
67
Citations by year
2025: 4 · 2024: 5 · 2023: 3 · 2022: 4 · 2021: 7 · 2020: 9 · 2019: 7 · 2018: 1
FWCI
1.39
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Hazardous Materials (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Korea Basic Science Institute (D38614)
  • Small and Medium Business Administration (S2060417)
  • Materials and Components Technology Development Program of MOTIE/KEIT (K10077357)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Iron oxide chemistry and applications
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
Keywords
iron oxide nanostructures, three-dimensional nanostructures, sonochemical synthesis, hematite, maghemite, phase transformation, post-heat treatment, heavy metal removal, arsenate removal, hexavalent chromium removal, photocatalytic degradation, methylene blue, phenols, wastewater treatment, self-assembly, oriented attachment, BET surface area

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