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

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 a...

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Bibliographic Details
Published in:Journal of science. Advanced materials and devices 2021-06, Vol.6 (2), p.245-253
Main Authors: Ngoc, Pham Kim, Mac, Trung Kien, Nguyen, Huu Tuan, Viet, Do Thanh, Thanh, Tran Dang, Van Vinh, Pham, Phan, Bach Thang, Duong, Anh Tuan, Das, Raja
Format: Article
Language:English
Subjects:
Hydrothermal
Nanoplates
Nanorices
Recyclability
Selective adsorption
Wastewater
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Summary: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. •α-Fe2O3 and Fe3O4 nanoplates and nanorices were synthesized by hydrothermal reaction.•α-Fe2O3 nanoplates showed selectivity & high adsorption capacity towards congo red.•α-Fe2O3 nanoplates showed excellent recyclability with negligible loss of the adsorption capacity.•Our study show role of H-bonding between ─ NH2 groups of C.R. and surface ─ COOH group of α-Fe2O3 nanoplates.•α-Fe2O3 nanoplates have a great potential in removing dye from wastewater.
ISSN:2468-2179
2468-2179
DOI:10.1016/j.jsamd.2021.02.006