Effect of Zn doping on physico-chemical properties of cobalt ferrite for the photodegradation of amoxicillin and deactivation of E. coli

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

doi:10.1016/j.colsurfa.2022.129462

Cited by 28 publications

(7 citation statements)

References 51 publications

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“…Since Zn 2+ and Li 1+ are diamagnetic and paramagnetic in nature respectively with 0 μ B (magnetic moment), so the contribution to magnetization mainly originates from magnetic ions with magnetic moments Fe 3+ (5 μ B ) and Co 2+ (3 μ B ). In crystal sublattice, octahedral site is occupied by Fe 3+ [ 52 ], Li 1+ [ 53 ], Co 2+ [ 15 , 54 ] and tetrahedral site by Zn 2+ [ 52 , 53 , 55 ] and Fe 3+ [ 52 ] as already discussed in XPS analysis. Additionally, Li 1+ and Zn 2+ will influence the ions occupancy among two sites such that the net magnetic moment will be affected, ultimately altering the magnetization values.…”

Section: Resultsmentioning

confidence: 99%

“…Based on enhanced coercivity, the author suggested the use of synthesized samples in loudspeakers and motors [ 14 ]. Mmelesi et al prepared zinc-doped cobalt ferrite through coprecipitation and found that the synthesized nanoparticles have great potential towards photocatalytic pharmaceutical degradation and antimicrobial applications [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Correlation between Magnetic and Dielectric Response of CoFe2O4:Li1+/Zn2+ Nanopowders Having Improved Structural and Morphological Properties

et al. 2023

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The vast applicability of spinel cobalt ferrite due to its unique characteristics implies the need for further exploration of its properties. In this regard, structural modification at the O-site of spinel with Li1+/Zn2+ was studied in detail for exploration of the correlation between structural, magnetic, and dielectric properties of the doped derivatives. The CTAB-assisted coprecipitation method was adopted for the synthesis of the desired compositions owing to its cost effectiveness and size controlling ability. Redistribution of cations at T- and O-sites resulted in the expansion of the crystal lattice, but no distortion of the cubic structure was observed, which further supports the flexible crystal structure of spinel for accommodating larger Li1+/Zn2+ cations. Moreover, an XPS analysis confirmed the co-existence of the most stable oxidation states of Zn2+, Li1+, Co2+, and Fe3+ ions with unstable Co3+ and Fe2+ ions as well, which induces the probability of hopping mechanisms to a certain extent and is a well-established behavior of cobalt ferrite nanoparticles. The experimental results showed that Li1+/Zn2+ co-doped samples exhibit the best magnetic properties at dopant concentration x = 0.3. However, increasing the dopant content causes disturbance at both sites, resulting in decreasing magnetic parameters. It is quite evident from the results that dielectric parameters are closely associated with each other. Therefore, dopant content at x = 0.1 is considered the threshold value exhibiting the highest dielectric parameters, whereas any further increase would result in decreasing the dielectric parameters. The reduced dielectric properties and enhanced magnetic properties make the investigated samples a potential candidate for magnetic recording devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation between Magnetic and Dielectric Response of CoFe2O4:Li1+/Zn2+ Nanopowders Having Improved Structural and Morphological Properties

et al. 2023

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“…The pH value plays a role in the formation of hydroxyl radicals. Alkaline pH conditions will affect the charge on the ZnO particles [15]. The carbon dioxide formed in the photodegradation process will increase the hydrogen content in the waste, resulting in a change in pH parameters.…”

Section: A Mass Effect Of Znomentioning

confidence: 99%

The Use of Zinc Oxide (ZnO) Photocatalyst for Photodegradation of Car Wash Wastewater

Hamdan,

Azkiya,

Rahman

et al. 2023

J. Fis. dan Apl.

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Untreated motor vehicle waste has the potential to damage the environment. The photodegradation method can decompose pollutants with the help of UV-A light and photocatalysts. Zinc Oxide (ZnO) is a photocatalyst capable of degrading motor vehicle washing waste. This study aims to investigate the ability of ZnO as a photocatalyst in degrading pollutants in motor vehicle waste. The independent variables in the experiment were the mass of ZnO and the contact time. The variables used were mass 0.5, 0.75, and 1 gram with a contact time of 2, 3, and 4 hours. The experimental results showed that ZnO irradiated with UV-A lamp was able to degrade organic substances. The mass and contact time of ZnO affect the effectiveness of photodegradation. These results show that the use of ZnO photocatalyst for photodegradation of Carwash Wastewater may be future technology to treat car wash wastewater.

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“…Because of its enormous implications in a variety of applications, the approach of modifying the magnetic behavior by Zn substitution is significant. The significance of Zn doping resides in its ability to affect the characteristics of cobalt ferrite, a well-known magnetic material with uses in catalysis, data storage, and biomedical devices. − Zn substitution may change the magnetic, electrical, and structural characteristics of the material, allowing researchers to adjust their qualities with respect to particular needs. − This provides a greater variety of functions and opens a new door for technologists and material scientists. Materials formed by Zn substitution in cobalt ferrite have prospective uses in fields such as high-frequency magnetic devices, spintronics, and magneto-optical devices .…”

Section: Introductionmentioning

confidence: 99%

Tuning the Magnetic Behavior of Zinc Ferrite via Cobalt Substitution: A Structural Analysis

Hussain,

Mehmood,

Ali

et al. 2024

ACS Omega

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Cobalt-doped zinc ferrite is a contemporary material with significant structural and magnetic characteristics. Our study explores the magnetic properties of cobalt-substituted zinc ferrite (Zn x Co 1−x Fe 2 O 4 ), synthesized via a simple sol−gel method. By varying the cobalt ratio from 0 to 0.5, we found that zinc substitution impacts both the magnetization and lattice parameters. FTIR analysis suggested the presence of functional groups, particularly depicting an M−O stretching band, within octahedral and tetrahedral clusters. X-ray diffraction analysis confirmed the phase purity and cubic structure. The synthesized materials exhibited an average particle size of 24−75 nm. Scanning electron microscopy revealed the morphological properties, confirming the formation of truncated octahedral particles. In order to determine the stability, mass loss (%), and thermal behavior, a thermal analysis (thermogravimetric analysis (TGA)/differential thermal analysis (DTA)) was performed. The magnetic properties of the synthesized ferrites were confirmed via a vibrating sample magnetometer (VSM). Finally, the highest saturated magnetization and lowest coercivity values were observed with higher concentrations of the cobalt dopant substituting zinc. The synthesized nanomaterials have good stability as compared to other such materials and can be used for magnetization in the near future.

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Effect of Zn doping on physico-chemical properties of cobalt ferrite for the photodegradation of amoxicillin and deactivation of E. coli

Cited by 28 publications

References 51 publications

Correlation between Magnetic and Dielectric Response of CoFe2O4:Li1+/Zn2+ Nanopowders Having Improved Structural and Morphological Properties

Correlation between Magnetic and Dielectric Response of CoFe2O4:Li1+/Zn2+ Nanopowders Having Improved Structural and Morphological Properties

The Use of Zinc Oxide (ZnO) Photocatalyst for Photodegradation of Car Wash Wastewater

Tuning the Magnetic Behavior of Zinc Ferrite via Cobalt Substitution: A Structural Analysis

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