Cobalt ferrite nanoparticles and nanocomposites: Photocatalytic, antimicrobial activity and toxicity in water treatment

Mmelesi, Olga Kelebogile; Masunga, Ngonidzashe; Kuvarega, Alex T.; Nkambule, Thabo T.I.; Mamba, Bhekie B.; Kefeni, Kebede K.

doi:10.1016/j.mssp.2020.105523

Cited by 117 publications

(39 citation statements)

References 200 publications

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“…It is worthy to note that under both the dark and UV-light conditions; Co−NZF demonstrated better antibacterial action against S. aureus strains than E. coli strains, which could be attributed to differences in their composition and cell membrane structure. Different mechanisms for the bactericidal effects of ferrites and metal oxides have been proposed in previous investigations (Asadi et al 2019;Aali et al 2019;Mizwari et al 2021;Mmelesi et al 2021). According to Méndez-Pfeiffer et al 2019, atomic force microscopy images revealed damage to the E. coli cellular wall in the presence of photoactivated Ag nanoparticles.…”

Section: Bacterial Disinfection Activity Performance Of Co−nzfmentioning

confidence: 97%

Photocatalytic Detoxification of Antibiotic- and Bacteria-Contaminated Water using Cobalt-Doped Ni–Zn Ferrites Magnetic Separable Nanopowders

Mustafa

Oladipo

Mizwari

et al. 2021

Preprint

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Here, metronidazole (MZ) antibiotic degradation and bactericidal efficacy of Co–Ni0.5Zn0.5Fe2O4 (Co–NZF) with and without photoactivation by UV light is reported as a viable cost-competitive water disinfection solution. Co–NZF has a total pore volume of 0.298 cm3 g− 1, a specific surface area of 70.2 m2 g− 1 and sufficiently high magnetic properties (80.35 emu g− 1). After 360 min of UV–assisted irradiation at pH 3, 10 mg Co–NZF, and 4 mM H2O2, the maximum MZ degradation was reached (92.8%). The adsorption result of 10 mg Co–NZF in the dark for 12 h resulted in 70.2% MZ removal, whereas MZ self-degradation was significantly minimal in a blank trial. In the presence of interfering anions and very high molecular weight tylosin antibiotic, Co–NZF maintained 51.7–75.4% degradation efficiency. The effect of the Co–NZF dosage on the viability of Staphylococcus aureus and Escherichia coli strains showed that 15 mg of the catalyst was sufficient to cause bactericidal activity after 180 min in the presence of UV light, while 25 mg is needed under dark conditions. In addition, when compared to Escherichia coli strains, Co–NZF showed higher inhibition against Staphylococcus aureus in time-kill experiments under dose variation.

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Section: Bacterial Disinfection Activity Performance Of Co−nzfmentioning

confidence: 97%

Photocatalytic Detoxification of Antibiotic- and Bacteria-Contaminated Water using Cobalt-Doped Ni–Zn Ferrites Magnetic Separable Nanopowders

Mustafa

Oladipo

Mizwari

et al. 2021

Preprint

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“…Ferrites nanoparticles have unique interesting and physical properties have started to consider possible biomedical treatments (Maksoud et al 2018), including improved drug solubility and durability and reduced harmful effects (Maksoud et al 2018). It has been applied for fascinating orientation in drug distribution (Nigam and Pawar, 2020), imaging agents and treatment of brain cancer (Hyder and Manjura Hoque, 2017), as a drug-delivery transport in biomedical procedures (Wang et al 2018), for the superior antimicrobial performance (Ashour et al 2018b;Mmelesi et al 2020). Shape, and nano-size, and purity of spinel ferrites, high catalytic performance, and encouraging magnetic feature, in addition to high elasticity increasing the removal of pathogenic microbes and the easy connection to the microbial cell which intern elevated their antimicrobial potential (Maksoud et al 2021b).…”

Section: Antimicrobial Activitymentioning

confidence: 99%

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

et al. 2021

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The rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.

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“…CoFe 2 O 4 is a hard magnetic material with remarkable properties such as: high magnetic coercivity, moderate saturation magnetization, a high Curie temperature (793 K), strong magnetocrystalline anisotropy, high chemical and structural stability. Cobalt ferrite nanoparticles are used in electronic devices (energy storage, microwave devices, sensors and biosensors, recording media), for the removal of toxic pollutants from water, in biomedical applications for drug delivery and hyperthermia [1][2][3]. Recent studies revealed the antibacterial properties of the cobalt ferrite nanoparticles on multidrug resistant bacterial strains [4].…”

Section: Introductionmentioning

confidence: 99%

Structural, morphological and magnetic investigations on cobalt ferrite nanoparticles obtained through green synthesis routes

et al. 2021

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This paper describes for the first time two processing routes-the precursor method and the two-step wet chemical process-for the synthesis of magnetic cobalt ferrite using the Tamarindus indica fruit extract. These green approaches are eco-friendly, safe and efficient alternatives to classical chemical methods. The aqueous extract from tamarind fruit contains numerous metabolites (organic acids, aminoacids). All these bioactive components are able to chelate metal ions leading to the formation of the multimetallic complex (precursor of cobalt ferrite). The obtained precursor was characterized by Fourier transform infrared spectroscopy (FTIR), thermal analysis, X-ray diffraction analysis (XRD) and magnetic measurements. The structure, morphology and magnetic behavior of the cobalt ferrite samples prepared through both synthesis routes were investigated by various characterization techniques: FTIR, XRD, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), Mössbauer spectroscopy and magnetic measurements. XRD data confirmed that a cubic spinel structure was obtained for both ferrite powders with average crystallite size of 13 and 5 nm, respectively. The microstructure study by SEM revealed the formation of nanocrystallites assemblies using the precursor method and carbon-rich particles forming granulated micron-sized agglomerates, embedding ferrite nanocrystallites obtained through the two-step wet chemical process. Mössbauer spectroscopy results evidenced relaxation processes in the CoFe 2 O 4 samples at room temperature, and the main characteristics of the involved sublattices were derived. The magnetic investigation revealed a typical magnetic behavior for a spinel, with CoFe 2 O 4 nanoparticles ferrimagnetic at low temperature and superparamagnetic at room temperature.

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Cobalt ferrite nanoparticles and nanocomposites: Photocatalytic, antimicrobial activity and toxicity in water treatment

Cited by 117 publications

References 200 publications

Photocatalytic Detoxification of Antibiotic- and Bacteria-Contaminated Water using Cobalt-Doped Ni–Zn Ferrites Magnetic Separable Nanopowders

Photocatalytic Detoxification of Antibiotic- and Bacteria-Contaminated Water using Cobalt-Doped Ni–Zn Ferrites Magnetic Separable Nanopowders

Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review

Structural, morphological and magnetic investigations on cobalt ferrite nanoparticles obtained through green synthesis routes

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