Synthesis of rod-like α-FeOOH nanoparticles and its photocatalytic activity in degradation of an azo dye: Empirical kinetic model development

Amani‐Ghadim, Ali Reza; Alizadeh, Shabnam; Khodam, Fatemeh; Rezvani, Zolfaghar

doi:10.1016/j.molcata.2015.06.037

Cited by 55 publications

(15 citation statements)

References 29 publications

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“…On the other hand, α-FeOOH is another important semiconductor material in the field of photocatalysts because of its extensive absorption band position in the visible light region, inexpensiveness, non-toxicity, and corrosion resistance [48][49][50]. Moreover, the α-FeOOH can easily couple with other semiconductors to enhance their photocatalytic performance in visible-light irradiation, thus obtaining the heterojunction photocatalysts [51,52].…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

et al. 2018

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In this work, we have synthesized the rod-on-rod–like α-FeOOH/α-AgVO3 nanocomposite photocatalysts with the different amounts of solvothermally synthesized α-FeOOH nanorods via a simple co-precipitation method. The as-synthesized photocatalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, UV−Visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM), element mapping, high-resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS) analysis. The observed SEM images show that both α-AgVO3 and α-FeOOH exhibits the rod-shaped morphology with nano size. Furthermore, the photocatalytic activities of the obtained photocatalysts were evaluated towards the degradation of Rhodamine B (RhB) under visible-light irradiation. It is demonstrated that the 3 mg α-FeOOH added to the α-FeOOH/α-AgVO3 nanocomposite exhibited an enhanced photocatalytic performance as compared with the pure α-AgVO3 and α-FeOOH. This significant improvement can be attributed to the increased photo-excited electron-hole pair separation efficiency, large portion of visible-light absorption ability and the reduced recombination of the electron-hole pair. The recycling test revealed that the optimized nanocomposite exhibited good photostability and reusability properties. In addition, the believable photodegradation mechanism of RhB using α-FeOOH/α-AgVO3 nanocomposite is proposed. Hence, the developed α-FeOOH/α-AgVO3 nanocomposite is a promising material for the degradation of organic pollutants in an aqueous environment.

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Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

et al. 2018

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“…The water molecules are oxidized at the CNF surface and produce free radicals that contribute to the photooxidation of MB. These results emphasize that the natural nano-goethite-based CNF structure is efficient as the nanowires with synthetic goethite of Londoño-Calderon [41] and Amani-Ghadim et al [37], which photodegraded up to 90% of the dye in 2 h.…”

Section: Langmuir Model Mbmentioning

confidence: 52%

“…Furthermore, the XRD pattern of the nanoparticle sample revealed the presence of 2-line ferrihydrite (Fe 5 HO 8 •4H 2 O), which was identified by its reflection at approximately 28 • and 38 • in 2 Theta. The XRD patterns of the generated materials were compared with available diffraction data from the ICDD (International Centre for Diffraction Data) and other references [37,38]. The analysis sample had an α-FeOOH structure, with peaks of low intensity and a broad peak indicating fine particles.…”

Section: Characterization Of Goethite Nanoparticlesmentioning

confidence: 99%

Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation

et al. 2020

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In the last decade, pathogenic bacteria and organic micropollutants have become a major issue in the water purification process. Heterogeneous photocatalysis is a low-cost and an ecofriendly process, which provides a sustainable solution for water treatment and its utilization in rural areas. In this context, we studied the generation and the surface engineering of polyacrylonitrile (PAN)/goethite composite nanofibers for photocatalytic water remediation under visible-light illumination. The photocatalytic activity was evaluated for dye (methylene blue) degradation and bacteria inactivation, as contaminant models, of the composite nanofibers. The PAN/goethite nanofibers were elaborated by an electrospinning technique, and the morphology and the composition, before and after spin coating, were investigated by Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray (EDX). The results showed partially intercalated structures of the PAN/goethite Composite-nano-fiber (CNF) were identified by SEM and EDX analysis. The composite nanofibers exhibited high photoefficiency upon dye bleaching (only 10% left after 5 h of illumination) and bacterial deactivation Escherichia coli and Clostridium perfringens (4.4- and 3.5-fold, respectively, in less than 5 h). The steadiness and pliancy of the generated nanofibers provide a promising application in the continuous flow system.

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“…For these reasons, the use of naturally occurring iron materials (as catalysts) activated by VIS LED to accelerate the iron redox cycle is especially interesting. Goethite is a cheap material, one of the most chemically stable iron oxides, showing excellent results in the process, acting as a visible-light photocatalyst with a bandgap of 2.502 eV [36,37].…”

Section: Introductionmentioning

confidence: 99%

Abatement of 1,2,4-Trichlorobencene by Wet Peroxide Oxidation Catalysed by Goethite and Enhanced by Visible LED Light at Neutral pH

et al. 2021

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There is significant environmental concern about chlorinated organic compounds (COCs) in wastewater, surface water, and groundwater due to their low biodegradability and high persistence. In this work, 1,2,4-trichlorobenzene (124-TCB) was selected as a model compound to study its abatement using wet peroxide oxidation at neutral pH with goethite as a heterogeneous catalyst, which was enhanced with visible monochromatic light-emitting diode (LED) light (470 nm). A systematic study of the main operating variables (oxidant and catalyst concentration and irradiance) was accomplished to investigate their influence in the abatement of 124-TCB in water. The reaction was carried out in a well-mixed reactor of glass irradiated by a visible LED light. The hydrogen peroxide concentration was tested from 0 to 18 mM, the goethite concentration within the range 0.1–1.0 g·L−1 and the irradiance from 0.10 to 0.24 W·cm−2 at neutral pH. It was found that this oxidation method is a very efficient technique to abate 124-TCB, reaching a pollutant conversion of 0.9 when using 0.1 g·L−1 of goethite, 18 mM of H2O2, and 0.24 of W·cm−2. Moreover, the system performance was evaluated using the photonic efficiency (ratio of the moles of 124-TCB abated and the moles of photons arriving at the reactor window). The maximum photonic efficiencies were obtained using the lowest lamp powers and moderate to high catalyst loads.

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Synthesis of rod-like α-FeOOH nanoparticles and its photocatalytic activity in degradation of an azo dye: Empirical kinetic model development

Cited by 55 publications

References 29 publications

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation

Abatement of 1,2,4-Trichlorobencene by Wet Peroxide Oxidation Catalysed by Goethite and Enhanced by Visible LED Light at Neutral pH

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