Study on photocatalytic and antibacterial properties of phase pure Fe2O3 nanostructures synthesized using Caralluma Fimbriata and Achyranthes Aspera leaves

Haseena, S.; Shanavas, S.; Duraimurugan, J.; Ahamad, Tansir; Alshehri, Saad M.; Acevedo, R.; Jayamani, N.

doi:10.1016/j.ijleo.2019.164047

Cited by 18 publications

(6 citation statements)

References 37 publications

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“…Likewise, the characteristic XRD peaks for magnetite (30.2, 35.6, 43.2, 56.8, and 62.8°) with the prominent peak at 35.6° confirm the successful synthesis of magnetite in accordance with the literature (Figure b) . Hematite nanoparticles showed characteristic XRD peaks at 24.2, 33.3, 35.8, 41, 49.6, 54.1, 57.9, 62.6, 72.3, and 75.7° with prominent peaks at 33.3 and 35.8° as stipulated in the literature. , Finally, a typical goethite XRD spectra (Figure b) with characteristic peaks at 21.1, 33, 41.3, 53.1, and 59° signified the successful synthesis thereof according to the literature . However, compared to the other synthesized nanoparticles, the XRD for goethite showed a lower degree of crystallinity, and so did its surface area from BET analysis (Table S1).…”

Section: Resultssupporting

confidence: 85%

Synthetic Ilmenite (FeTiO₃) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

Muzenda

Nkwachukwu

Arotiba

2022

Ind. Eng. Chem. Res.

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Explorations into the potential application of dualmetallic iron oxides, (FeXO 3 ), [where X is a transition metal] as heterogeneous electro-Fenton (HEF) catalysts have been of interest due to their enhanced catalytic activity. We thus present the synthesis and application of ilmenite (FeTiO 3 ) nanoparticles as a catalyst for HEF degradation of tetracycline (a pharmaceutical pollutant) in water. The ilmenite nanoparticles were characterized with electron microscopy, X-ray diffraction, Fourier transform IR spectroscopy, and BET analysis prior to their immobilization on a graphite felt (GF) cathode for HEF reactions. The effects of pH and catalyst loading on the HEF process were investigated. The extent of degradation was monitored with UV/vis spectroscopy and total organic carbon (TOC) measurements. The HEF system was robust over a wide pH range. Tetracycline in synthetic and real wastewater matrices was degraded, producing 61 and 40% TOC removal in 2 h, respectively. The comparative studies for the catalytic efficiencies of ilmenite (Ti-doped iron oxide) and commonly used HEF iron oxide catalysts, like magnetite, hematite, and goethite showed that synthetic ilmenite is an effective HEF catalyst for the degradation of organic pollutants in water. A slight Ti cocatalysis effect was observed in ilmenite nanoparticles based on the comparative HEF degradation results catalyzed by pristine iron oxide (hematite, Fe 2 O 3 ) and ilmenite (iron−titanium oxide). Our results show that ilmenite can be reused up to six cycles without loss of activity, and therefore it is an effective HEF catalyst for wastewater treatment.

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Section: Resultssupporting

confidence: 85%

Synthetic Ilmenite (FeTiO₃) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

Muzenda

Nkwachukwu

Arotiba

2022

Ind. Eng. Chem. Res.

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“…The novel antibacterial activity of Fe 2 O 3 was also recently verified on different works [ 6 , 7 , 45 ]. Pallela et al [ 7 ] synthesized Fe 2 O 3 with an average particle size of 16 nm.…”

Section: Introductionmentioning

confidence: 68%

“…It is a versatile inorganic material with a broad range of applications and it was also recorded as a safe material by the U.S. FDA (21CFR182.8991). The generation of ROS and antibacterial activities by iron and manganese oxides were also confirmed [ 6 – 10 ]. Furthermore, iron oxide creates stability against photo/chemical corrosion during the formation of heterojunction with ZnO [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 92%

A Review on Enhancing the Antibacterial Activity of ZnO: Mechanisms and Microscopic Investigation

et al. 2020

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Metal oxide nanomaterials are one of the preferences as antibacterial active materials. Due to its distinctive electronic configuration and suitable properties, ZnO is one of the novel antibacterial active materials. Nowadays, researchers are making a serious effort to improve the antibacterial activities of ZnO by forming a composite with the same/different bandgap semiconductor materials and doping of ions. Applying capping agents such as polymers and plant extract that control the morphology and size of the nanomaterials and optimizing different conditions also enhance the antibacterial activity. Forming a nanocomposite and doping reduces the electron/hole recombination, increases the surface area to volume ratio, and also improves the stability towards dissolution and corrosion. The release of antimicrobial ions, electrostatic interaction, reactive oxygen species (ROS) generations are the crucial antibacterial activity mechanism. This review also presents a detailed discussion of the antibacterial activity improvement of ZnO by forming a composite, doping, and optimizing different conditions. The morphological analysis using scanning electron microscopy, field emission-scanning electron microscopy, field-emission transmission electron microscopy, fluorescence microscopy, and confocal microscopy can confirm the antibacterial activity and also supports for developing a satisfactory mechanism. Graphical abstract Graphical abstract showing the metal oxides antibacterial mechanism and the fluorescence and scanning electron microscopic images.

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“…They found that the decomposition decreased in the presence of the scavengers, confirming the participation of the radicals in the degradation process. In another study reported by Haseena et al [40], test or reactive HO . , h + , and O 2 −.…”

Section: Test For Reactive Speciesmentioning

confidence: 90%

Photocatalytic activity of CuO nanoparticles for organic and inorganic pollutants removal in wastewater remediation

et al. 2022

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Study on photocatalytic and antibacterial properties of phase pure Fe2O3 nanostructures synthesized using Caralluma Fimbriata and Achyranthes Aspera leaves

Cited by 18 publications

References 37 publications

Synthetic Ilmenite (FeTiO₃) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

Synthetic Ilmenite (FeTiO₃) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

A Review on Enhancing the Antibacterial Activity of ZnO: Mechanisms and Microscopic Investigation

Photocatalytic activity of CuO nanoparticles for organic and inorganic pollutants removal in wastewater remediation

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Study on photocatalytic and antibacterial properties of phase pure Fe2O3 nanostructures synthesized using Caralluma Fimbriata and Achyranthes Aspera leaves

Cited by 18 publications

References 37 publications

Synthetic Ilmenite (FeTiO3) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

Synthetic Ilmenite (FeTiO3) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

A Review on Enhancing the Antibacterial Activity of ZnO: Mechanisms and Microscopic Investigation

Photocatalytic activity of CuO nanoparticles for organic and inorganic pollutants removal in wastewater remediation

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Product

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Synthetic Ilmenite (FeTiO₃) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater

Synthetic Ilmenite (FeTiO₃) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater