Monodisperse cobalt ferrite nanoparticles assembled on mesoporous graphitic carbon nitride (CoFe2O4/mpg-C3N4): A magnetically recoverable nanocomposite for the photocatalytic degradation of organic dyes

Hassani, Aydin; Eghbali, Paria; Ekicibil, Ahmet; Metin, Önder

doi:10.1016/j.jmmm.2018.02.067

Cited by 134 publications

(28 citation statements)

References 75 publications

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“…The low recovery costs of catalysts is a significant factor in the development of sustainable catalyst systems [35][36][37][38][39][40][41]. Therefore, magnetically supported catalyst systems are considered to be one of the most important platforms as they can be easily separated from the reaction media via the aid of an external magnet [28,42,43 No significant change was observed in the ATR-FTIR spectra of MnFe2O4@SiO2-Ag on doping with AgNPs except minor intensity and position changes in the ∼750-1250 cm -1 region.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Reductant free green synthesis of magnetically recyclable MnFe2O4@SiO2-Ag core- shell nanocatalyst for the direct reduction of organic dye pollutants

2021

Turk J Chem

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The present paper describes in situ green immobilization of silver nanoparticles on MnFe2O4@SiO2 nanospheres using Epilobium parviflorum (EP) without using any other toxic chemicals and reducing or stabilizing agents. The morphology, composition, and magnetic properties of the resulting MnFe2O4@SiO2-Ag core-shell nanocatalyst were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), 2 thermogravimetric analysis (TGA), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR).The catalytic performance of the as synthesized MnFe2O4@SiO2-Ag was employed on the organic pollutants dyes such as rhodamine B (RhB) and methylene blue (MB). The results revealed significant reduction performances for the MB (116.28 s -1 g -1 ) and RhB (27.12 s -1 g -1 ) over the existing literature. Furthermore, the MnFe2O4@SiO2-Ag exhibited a higher stability for the completion of the reduction of RhB between the reaction times of 13.1 (first) and 19.8 min (final) with the 100% decolorization efficiency even after several cycles with an excellent magnetic separation. Overall, this work demonstrates a simple and practical green synthetic route for the preparation of magnetic recyclable core-shell nanocatalyst that can be good candidates for the treatment of organic contaminants in wastewater adhering to green chemistry principles for the environmental pollution concerns.

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Section: Synthesis and Characterizationmentioning

confidence: 99%

Reductant free green synthesis of magnetically recyclable MnFe2O4@SiO2-Ag core- shell nanocatalyst for the direct reduction of organic dye pollutants

2021

Turk J Chem

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“…From an economic viewpoint, the catalyst amount is a significant parameter in the photocatalysis method [28]. For measuring the impact of photocatalyst amount on decolorization, different concentrations (between 0.02-0.05 gr) of the CoCr 2 O 4 NPs were inquired in 50 ml of EBT dye (20 mg l −1 ), at a constant time of 90 min.…”

Section: Effect Of Photocatalyst Dosagementioning

confidence: 99%

Green synthesis, characterization, and photocatalytic activity of cobalt chromite spinel nanoparticles

Fardood

Forootan

Moradnia

et al. 2020

Mater. Res. Express

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Eriochrome Black T, an azo dye, was degraded under visible light irradiation using CoCr 2 O 4 nanoparticles as a photocatalyst. In this study, CoCr 2 O 4 cubic-spinel nanoparticles were synthesized via a novel and green sol-gel method. The synthesized sample was characterized by EDX, XRD, TEM, FESEM, DRS, and FTIR. The CoCr 2 O 4 NPs have good photocatalytic activity for degradation of Eriochrome Black T (EBT) dye at room conditions so that 90% of EBT was degraded in 90 min under the visible light. The CoCr 2 O 4 NPs reusability was scanned and confirmed that the nano-photocatalyst shows a few declines in its activity after the three runs.

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“…In order to perform PDT on a cancer patient, a photosensitizing agent must be used, which results in the production of a reactive oxygen species (ROS) when exposed to light . In this respect, g‐C 3 N 4 has been shown to be an efficient PDT agent because it generates ROS, mainly

O_{2}^{• -}

and • OH radicals, in aqueous solution upon its irradiation under visible light . Production of these type of ROS by the utilization of g‐C3N4 as a PDT agent is expected to destroy cancer cells and nearby vasculature thereby preventing the tumor from receiving necessary nutrients.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytically Active Graphitic Carbon Nitride as an Effective and Safe 2D Material for In Vitro and In Vivo Photodynamic Therapy

Taheri

Ünal

Sevim

et al. 2020

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Thanks to its photocatalytic property, graphitic carbon nitride (g‐C3N4) is a promising candidate in various applications including nanomedicine. However, studies focusing on the suitability of g‐C3N4 for cancer therapy are very limited and possible underlying molecular mechanisms are unknown. Here, it is demonstrated that photoexcitation of g‐C3N4 can be used effectively in photodynamic therapy, without using any other carrier or additional photosensitizer. Upon light exposure, g‐C3N4 treatment kills cancer cells, without the need of any other nanosystem or chemotherapeutic drug. The material is efficiently taken up by tumor cells in vitro. The transcriptome and proteome of g‐C3N4 and light treated cells show activation in pathways related to both oxidative stress, cell death, and apoptosis which strongly suggests that only when combined with light exposure, g‐C3N4 is able to kill cancer cells. Systemic administration of the mesoporous form results in elimination from urinary bladder without any systemic toxicity. Administration of the material significantly decreases tumor volume when combined with local light treatment. This study paves the way for the future use of not only g‐C3N4 but also other 2D nanomaterials in cancer therapy.

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Monodisperse cobalt ferrite nanoparticles assembled on mesoporous graphitic carbon nitride (CoFe2O4/mpg-C3N4): A magnetically recoverable nanocomposite for the photocatalytic degradation of organic dyes

Cited by 134 publications

References 75 publications

Reductant free green synthesis of magnetically recyclable MnFe2O4@SiO2-Ag core- shell nanocatalyst for the direct reduction of organic dye pollutants

Reductant free green synthesis of magnetically recyclable MnFe2O4@SiO2-Ag core- shell nanocatalyst for the direct reduction of organic dye pollutants

Green synthesis, characterization, and photocatalytic activity of cobalt chromite spinel nanoparticles

Photocatalytically Active Graphitic Carbon Nitride as an Effective and Safe 2D Material for In Vitro and In Vivo Photodynamic Therapy

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