Synthesis of Superparamagnetic Fe 3 O 4 Nano-Adsorbent Using an Energy-Saving and Pollution-Reducing Strategy for the Removal of Xylenol Orange Dye in Water

Yaohui Xu, Qin Wang and Zhao Ding ()
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Yaohui Xu: Laboratory for Functional Materials, School of Electronics and Materials Engineering, Leshan Normal University, Leshan 614000, China
Qin Wang: Laboratory for Functional Materials, School of Electronics and Materials Engineering, Leshan Normal University, Leshan 614000, China
Zhao Ding: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Energies, 2022, vol. 15, issue 19, 1-10

Abstract: The superparamagnetic Fe 3 O 4 nanoparticles as an absorbent with a size distribution of 4.8–6.4 nm were synthesized using a simple one-pot hydrothermal strategy at 200 °C for 24 h, where iron citrate and distilled were the sum total of raw materials. The as-synthesized Fe 3 O 4 powders showed rapid and efficient adsorption for xylenol orange with a saturated adsorption amount of 42.5 mg/g according to Langmuir linear fitting, and the adsorption reaction between xylenol orange adsorbate and Fe 3 O 4 adsorbent was mostly completed within 10 min. The Fe 3 O 4 nanoparticles not only had superparamagnetism with a saturation magnetization value of 54.9 emu/g at 15 kOe but also possessed strong magnetic response, making them easy to separate easily from aqoeous solution under the attraction of magnet. In this work, the Fe 3 O 4 particles can be totally attracted toward the magnet within 15 s, leaving the suspension a clear solution.

Keywords: iron citrate; magnetic Fe 3 O 4; superparamagnetism; hydrothermal; adsorption; dye (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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