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Evolution of Waste Iron Rust into Magnetically Separable g‑C3N4–Fe2O3 Photocatalyst: An Efficient and Economical Waste Management Approach
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posted on 2018-08-20, 00:00 authored by Santosh Babar, Nana Gavade, Harish Shinde, Prasad Mahajan, Ki Hwan Lee, Narayan Mane, Ashish. Deshmukh, Kalyanrao Garadkar, Vijaykumar BhuseThe
corrosion of iron structures gives rise to serious safety,
environmental pollution, and economic issues. However, current technologies
are neither efficient to impede the corrosion completely nor effective
in the recycling of waste iron rust. To best recycle of waste iron
rust, we report a simple, cost-free, and sustainable strategy to exploit
iron rust as a Fe-precursor for the synthesis of magnetic Fe2O3 nanoparticles (NPs) via simple grinding and calcination
process. The process efficiently transforms bulky iron rust into ferromagnetic
Fe2O3 NPs, which exist in both α and γ
phases. Synthesized materials were characterized by X-ray diffraction,
scanning electron microscopy with energy dispersive X-ray spectroscopy,
transmission electron microscopy, X-ray photoelectron spectroscopy,
UV–vis diffuse reflectance spectra, and vibrating sample magnetometer.
We also explored the catalytic ability of rust-derived Fe2O3 as a low-cost material for the fabrication of magnetically
separable g-C3N4–Fe2O3 composite as a photocatalyst. It is interesting to find that
the g-C3N4–Fe2O3 composite exhibited superior photocatalytic activity than that of
individual g-C3N4 and Fe2O3 under sunlight toward Methyl Orange and Textile Effluent. Moreover,
the g-C3N4–Fe2O3 composite exhibited excellent reusability without loss of photocatalytic
activity after successive five runs, and more importantly, photocatalyst
could be recovered magnetically. The histological studies on the gills
of freshwater fish Tilapia revealed that toxic dye
solution induced damage to secondary gill lamellae, whereas the photodegraded
products were found to less toxic and did not cause any structural
alteration in the gill architecture. This innovative process of waste
recycling offers a cost-free and large-scale approach to transform
waste iron rust into magnetically separable Fe-based photocatalyst
for environmental remediation.
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iron rustWaste Iron Rustgillenergy dispersive X-ray spectroscopyFe 2 O 3 nanoparticlesEconomical Waste Management Approachrust-derived Fe 2 O 3UVFe 2 O 3waste iron rustphotocatalystscanning electron microscopytransmission electron microscopyFe 2 O 3 NPsX-ray photoelectron spectroscopyphotocatalytic activityg-C 3 N 4
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