Preparation and visible-light photocatalytic activity of α-Fe2O3/γ-Fe2O3 magnetic heterophase photocatalyst

Wei, Zhiwei; Wei, Xiucheng; Wang, Suiyan; He, Deyan

doi:10.1016/j.matlet.2013.12.051

Cited by 47 publications

(5 citation statements)

References 14 publications

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“…33–0664). Thus, we can conclude that the synthesized Fe 2 O 3 NPs consist of both α and γ phases possess excellent magnetization values than the α-Fe 2 O 3 . This is attributed to the calcination of iron rust at 450 °C is efficient for the phase transformation of thermodynamically unstable γ-Fe 2 O 3 into thermodynamically stable α-Fe 2 O 3 and iron oxide hydroxide [FeOOH] to iron oxide [Fe 2 O 3 ] phase by losing water molecule. , The average crystallite size of the as-synthesized Fe 2 O 3 NPs was about 17 nm, calculated from the Debye–Scherrer equation based on the measurements of the fwhm of the strongest (311) peaks.…”

Section: Results and Discussionmentioning

confidence: 88%

Evolution of Waste Iron Rust into Magnetically Separable g-C₃N₄–Fe₂O₃ Photocatalyst: An Efficient and Economical Waste Management Approach

Babar¹,

Gavade²,

Shinde³

et al. 2018

ACS Appl. Nano Mater.

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The 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 Feprecursor for the synthesis of magnetic Fe 2 O 3 nanoparticles (NPs) via simple grinding and calcination process. The process efficiently transforms bulky iron rust into ferromagnetic Fe 2 O 3 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 Fe 2 O 3 as a low-cost material for the fabrication of magnetically separable g-C 3 N 4 −Fe 2 O 3 composite as a photocatalyst. It is interesting to find that the g-C 3 N 4 −Fe 2 O 3 composite exhibited superior photocatalytic activity than that of individual g-C 3 N 4 and Fe 2 O 3 under sunlight toward Methyl Orange and Textile Effluent. Moreover, the g-C 3 N 4 −Fe 2 O 3 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. KEYWORDS: corrosion, iron rust, magnetic Fe 2 O 3 , g-C 3 N 4 −Fe 2 O 3 , photocatalyst, heterojunction, photodegradation

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Section: Results and Discussionmentioning

confidence: 88%

Evolution of Waste Iron Rust into Magnetically Separable g-C₃N₄–Fe₂O₃ Photocatalyst: An Efficient and Economical Waste Management Approach

Babar¹,

Gavade²,

Shinde³

et al. 2018

ACS Appl. Nano Mater.

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“…The photocatalytic ozonation of monochloroacetic acid and pyridine led to 6 and 24 times higher degradation rates than without TiO 2 and 4 and 18 times higher rates than without ozone Kopf et al (2000) Formic acid, acetic acid and propionic acid in solution are very efficient non-selective oxidizers, which result in the oxidation and eventual mineralization of organic compounds. Photocatalysts typically include TiO 2 (Gaya and Abdullah, 2008;Wang and Jing, 2014), ZnO (Kaur and Singhal, 2014;Xu et al, 2014a), WO 3 Katsumata et al, 2014), CdSe (Elmalem et al, 2008;Li et al, 2014), CdS (Chronopoulos et al, 2014;Lang et al, 2014), a-Fe 2 O 3 Wei et al, 2014), SnO 2 (Wang et al, 2002a;Jana et al, 2014) and Ag 3 PO 4 (Bi et al, 2011;Zhang et al, 2014a). Among these semiconductor materials, TiO 2 is the most extensively and intensively studied one due to its high photoconductivity, chemical stability, low toxicity, low costs and wide commercial availability.…”

Section: Photocatalystsmentioning

confidence: 99%

Organic pollutants removal in wastewater by heterogeneous photocatalytic ozonation

Xiao

Xie

Cao³

2015

Chemosphere

310

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“…Metal oxides (MOs) are among the most commonly used materials for advanced applications due to their availability, low cost, simple synthesis procedures and flexible morphology and composition [2]. Accordingly, many researchers have used these materials for different applications, ranging from catalysts [3] to sensors [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

et al. 2019

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X-Ray radiation sensors that work at room temperature are in demand. In this study, a novel, low-cost real-time X-ray radiation sensor based on SnO2 nanowires (NWs) was designed and tested. Networked SnO2 NWs were produced via the vapor–liquid–solid technique. X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (SEM) analyses were used to explore the crystallinity and morphology of synthesized SnO2 NWs. The fabricated sensor was exposed to X-rays (80 kV, 0.0–2.00 mA) and the leakage current variations were recorded at room temperature. The SnO2 NWs sensor showed a high and relatively linear response with respect to the X-ray intensity. The X-ray sensing results show the potential of networked SnO2 NWs as novel X-ray sensors.

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Preparation and visible-light photocatalytic activity of α-Fe2O3/γ-Fe2O3 magnetic heterophase photocatalyst

Cited by 47 publications

References 14 publications

Evolution of Waste Iron Rust into Magnetically Separable g-C₃N₄–Fe₂O₃ Photocatalyst: An Efficient and Economical Waste Management Approach

Evolution of Waste Iron Rust into Magnetically Separable g-C₃N₄–Fe₂O₃ Photocatalyst: An Efficient and Economical Waste Management Approach

Organic pollutants removal in wastewater by heterogeneous photocatalytic ozonation

A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

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Preparation and visible-light photocatalytic activity of α-Fe2O3/γ-Fe2O3 magnetic heterophase photocatalyst

Cited by 47 publications

References 14 publications

Evolution of Waste Iron Rust into Magnetically Separable g-C3N4–Fe2O3 Photocatalyst: An Efficient and Economical Waste Management Approach

Evolution of Waste Iron Rust into Magnetically Separable g-C3N4–Fe2O3 Photocatalyst: An Efficient and Economical Waste Management Approach

Organic pollutants removal in wastewater by heterogeneous photocatalytic ozonation

A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

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Product

Resources

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Evolution of Waste Iron Rust into Magnetically Separable g-C₃N₄–Fe₂O₃ Photocatalyst: An Efficient and Economical Waste Management Approach

Evolution of Waste Iron Rust into Magnetically Separable g-C₃N₄–Fe₂O₃ Photocatalyst: An Efficient and Economical Waste Management Approach