Excellent organic dye adsorption capacity and recyclability of hydrothermally synthesized α-Fe2O3 nanoplates and nanorices

Pham Kim Ngoc, Trung Kien Mac, Huu Tuan Nguyen, Do Thanh Viet, Tran Dang Thanh, Pham Van Vinh, Bach Thang Phan, Anh Tuan Duong, Raja Das

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

α-Fe2O3 and Fe3O4 nanoplates and nanorices were synthesized by hydrothermal reaction and used for organic pollutant adsorption and removal studies. The effect of size and morphology of α-Fe2O3 and Fe3O4 nanoplates and nanorices on the dye adsorption efficiency were investigated systematically. The adsorption studies showed a good selectivity and high adsorption capacity (~93%) of the α-Fe2O3 nanoplates towards congo red (C.R.) dye, due to the formation of hydrogen bonding between amine group (─ NH2) of C.R. and surface carboxylate group (─ COOH), and adsorbed ─ OH groups of α-Fe2O3 nanoplates. The α-Fe2O3 nanoplates also showed excellent recyclability with negligible loss of the adsorption capacity, owing to their stable morphology and crystal structure. The excellent C.R. adsorption capacity of the α-Fe2O3 nanoplates was further confirmed by conducting experiments with a solution containing a mixture of dyes. Our findings indicate that the synthesized α-Fe2O3 nanoplates have a great potential in removing industrial waste, such as C.R. from polluted water.

Original languageEnglish
Pages (from-to)245-253
Number of pages9
JournalJournal of Science: Advanced Materials and Devices
Volume6
Issue number2
DOIs
Publication statusPublished - Jun 2021
Externally publishedYes

Keywords

  • Hydrothermal
  • Nanoplates
  • Nanorices
  • Recyclability
  • Selective adsorption
  • Wastewater

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