Sunlight photocatalytic performance of Mg-doped nickel ferrite synthesized by a green sol-gel route

Nadumane, Aparna; Shetty, Krushitha; Anantharaju, K.S.; Nagaswarupa, H.P.; Rangappa, Dinesh; Vidya, Y.S.; Nagabhushana, H.; Prashantha, S.C.

doi:10.1016/j.jsamd.2018.12.002

Cited by 30 publications

(17 citation statements)

References 37 publications

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“…Figure S2 presents the XRD spectra of CTAS@NIFE showing the peaks at 2θ values of 30.75 220), (300), ( 311), (320), ( 400), ( 411), ( 420), ( 422), ( 333), ( 521), (433), and (442). From the literature, it was found that the characteristic peak for bulk NIFE MNPs appeared at 2θ values of 31.29 220), ( 311), ( 222), ( 400), ( 422), (333), and (440) (PDF 54-0964) [22]. Thus, based on the observed deviation in the Miller index values from bulk NIFE MNPs to CTAS@NIFE, we can confirm that NiFe 2 O 4 MNPs are successfully functionalized by the biopolymer blend of CT-AS.…”

Section: Analytical Techniques For Materials Characterizationmentioning

confidence: 99%

“…In the past two decades, nanocrystalline forms of magnetic spinel ferrites (MFe 2 O 4 , where M represents a divalent ion, such as Mn 2+ , Ni 2+ , Co 2+ ) have been studied due to their size, shape, purity, surface area, and catalytic, magnetic and chemical properties [18,19]. Various spinel ferrites with variable aspect ratios, e.g., CoFe 2 O 4 [20], MgFeO 4 /Bi 2 MoO 6 [21], NiFe 2 O 4 :Mg 2+ [22], ZnO/ZnFe 2 O 4 [23], and Zr x Mg 0.2−x Co 0.8−x Fe 2 O 4 [24] have been utilized for the photocatalysis of MG dye. In the present study, we synthesized the nanocrystalline NiFe 2 O 4 spinel ferrites by the chemical coprecipitation method using the environmentally friendly synthesis protocols termed as green route via utilization of the reducing capacity of chitosan-ascorbic acid (CT-AS) biopolymer blend.…”

Section: Introductionmentioning

confidence: 99%

“…In the present study, we synthesized the nanocrystalline NiFe 2 O 4 spinel ferrites by the chemical coprecipitation method using the environmentally friendly synthesis protocols termed as green route via utilization of the reducing capacity of chitosan-ascorbic acid (CT-AS) biopolymer blend. Nickel ferrite is an important spinel ferrite material with distinctive applications, such as in microwave devices, catalysts, photomagnetic materials, drug delivery, and magnetic storage systems [22,25,26]. Nickel ferrite has an inverse spinel cubic structure with Fe 3+ ions at tetrahedral sites and Ni 2+ ions at octahedral sites.…”

Section: Introductionmentioning

confidence: 99%

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Sonophotocatalytic Degradation of Malachite Green by Nanocrystalline Chitosan-Ascorbic Acid@NiFe2O4 Spinel Ferrite

et al. 2020

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Statistics show that more than 700 thousand tons of dye are produced annually across the globe. Around 10–20% of this is used in industrial processes such as printing and dyeing, while about 50% of the dye produced is discharged into the environment without proper physicochemical treatment. Even trace amounts of dye in water can reduce oxygen solubility and have carcinogenic, mutagenic, and toxic effects on aquatic organisms. Therefore, before dye-containing wastewater is discharged into the environment, it must be properly treated. The present study investigates the green synthesis of nickel ferrite NiFe2O4 (NIFE) spinel magnetic nanoparticles (MNPs) via chemical coprecipitation of a solution of Ni2+/Fe3+ in the presence of a biopolymer blend of chitosan (CT) and ascorbic acid (AS). The magnetic nanomaterial was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy–energy dispersive X-ray analysis (SEM-EDX), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-Vis), differential scanning calorimetry (DSC), and vibrating-sample magnetometry (VSM). The material was further explored as a catalyst for the photocatalytic degradation of malachite green (MG) under visible light irradiation coupled with ultrasonic waves. The combination of 90 min of visible solar light irradiation with 6.35 W·mL−1 ultrasonic power at pH 8 resulted in 99% of the photocatalytic efficiency of chitosan-ascorbic acid@NIFE (CTAS@NIFE) catalyst for 70 mg·L−1 MG. The quenching of the photocatalytic efficiency from 98% to 64% in the presence of isopropyl alcohol (IPA) suggested the involvement of hydroxy (•OH) radicals in the mineralization process of MG. The high regression coefficients (R2) of 0.99 for 35, 55, and 70 mg·L−1 MG indicated the sonophotocatalysis of MG by CTAS@NIFE was best defined by a pseudo first-order kinetic model. The mechanism involves the adsorption of MG on the catalyst surface in the first step and thereby mineralization of the MG by the generated hydroxyl radicals (•OH) under the influence of visible radiation coupled with 6.34 W·mL−1 ultrasonic power. In the present study the application of photodegradation process with sonochemistry results in 99% of MG mineralization without effecting the material structure unlike happens in the case adsorption process. So, the secondary pollution (generally happens in case of adsorption) can be avoided by reusing the spent material for another application instead of disposing it. Thus, the ecofriendly synthesis protocol, ease in design of experimentation like use of solar irradiation instead of electric power lamps, reusability and high efficiency of the material suggested the study to be potentially economical for industrial development at pilot scale towards wastewater remediation.

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Section: Analytical Techniques For Materials Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sonophotocatalytic Degradation of Malachite Green by Nanocrystalline Chitosan-Ascorbic Acid@NiFe2O4 Spinel Ferrite

et al. 2020

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“…Thus, annealing temperature affected the particle size, morphology, and surface area of cobalt ferrites. Kubelka-Munk model was employed to calculate the band gaps (Eg) of CoFe2O4 nanoparticles using the absorption coefficient (α) calculated from diffuse reflectance spectra (DRS), as follows [39,40]:…”

Section: Samples R (Nm) a (å)mentioning

confidence: 99%

CoFe2O4 Nanomaterials: Effect of Annealing Temperature on Characterization, Magnetic, Photocatalytic, and Photo-Fenton Properties

et al. 2019

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In this research, structural, magnetic properties and photocatalytic activity of cobalt ferrite spinel (CoFe2O4) nanoparticles were studied. The samples were characterized by X-ray powder diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscopy (SEM), transmission electronic microscopy (TEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectroscopy (FTIR), and UV-visible diffused reflectance spectroscopy (DRS) analysis. The XRD analysis revealed the formation of the single-phase CoFe2O4 with a cubic structure that is annealed at 500–700 °C in 3 h. The optical band gap energy for CoFe2O4 was determined to be in the range of 1.57–2.03 eV. The effect on the magnetic properties of cobalt ferrites was analyzed by using a vibrating sample magnetometer (VSM). The particle size and the saturation magnetization of cobalt ferrite nanoparticles increased with increasing annealing temperature. The photocatalytic activity of CoFe2O4 nanoparticles was investigated by using rhodamine B dye under visible light. The decomposition of rhodamine B reached 90.6% after 270 min lighting with the presence of H2O2 and CF500 sample.

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“…It was previously noted that the structural features and magnetic, electrical characteristics and catalytic activity of ferrites could be dependent on the metals in the ferrite lattice structure [30]. In addition, several studies have reported the enhancement in the catalytic activity of ferrites with different metal substitution and change in cation distribution.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of Spherical Nd3+ Substituted ZnFe2O4 Nanoparticles

Nguyen

et al. 2021

Materials

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In this study, nanocrystalline ZnNdxFe2−xO4 ferrites with x = 0.0, 0.01, 0.03 and 0.05 were fabricated and used as a catalyst for dye removal potential. The effect of Nd3+ ions substitution on the structural, optical and photo-Fenton activity of ZnNdxFe2−xO4 has been investigated. The addition of Nd3+ ions caused a decrease in the grain size of ferrites, the reduction of the optical bandgap energies and thus could be well exploited for the catalytic study. The photocatalytic activity of the ferrite samples was evaluated by the degradation of Rhodamine B (RhB) in the presence of H2O2 under visible light radiation. The results indicated that the ZnNdxFe2−xO4 samples exhibited higher removal efficiencies than the pure ZnFe2O4 ferrites. The highest degradation efficiency was 98.00%, attained after 210 min using the ZnNd0.03Fe1.97O4 sample. The enhanced photocatalytic activity of the ZnFe2O4 doped with Nd3+ is explained due to the efficient separation mechanism of photoinduced electron and holes. The effect of various factors (H2O2 oxidant concentration and catalyst loading) on the degradation of RhB dye was clarified.

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Sunlight photocatalytic performance of Mg-doped nickel ferrite synthesized by a green sol-gel route

Cited by 30 publications

References 37 publications

Sonophotocatalytic Degradation of Malachite Green by Nanocrystalline Chitosan-Ascorbic Acid@NiFe2O4 Spinel Ferrite

Sonophotocatalytic Degradation of Malachite Green by Nanocrystalline Chitosan-Ascorbic Acid@NiFe2O4 Spinel Ferrite

CoFe2O4 Nanomaterials: Effect of Annealing Temperature on Characterization, Magnetic, Photocatalytic, and Photo-Fenton Properties

Enhanced Photocatalytic Activity of Spherical Nd3+ Substituted ZnFe2O4 Nanoparticles

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