Catalytic and Photocatalytic Properties of Oxide Spinels

Tatarchuk, Tetiana; Al-Najar, B.; Bououdina, M.; Ahmed, M. A.

doi:10.1007/978-3-319-68255-6_158

Cited by 25 publications

(6 citation statements)

References 126 publications

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“…55 These emission wavelengths corresponds to near band edge transitions due to both free exciton recombination as well as due to electron transition from nickel interstitials to valance band top. 56 Emission peak at 520 nm exist due to Graphene oxide interaction with excited nickel chromite nanoparticles and quenching effect is observable alongwith decrease in Pl intensity as a result of fast charge transfer rate between GO and NiCr 2 O 4 nanoparticles. 57 Electrochemical studies.-Basic feature of electrochemical analysis during cyclic voltammetry analysis is peak potential at room temperature (25 °C) and this behavior persists irrespective of scan rate resulting in reversible pattern confirming redox process.…”

Section: Resultsmentioning

confidence: 98%

Graphene Oxide/Nickel Chromite Nanocomposite: Optimized Synthesis, Structural and Optical Properties

Shafique

Mahmood

Batool

et al. 2021

ECS J. Solid State Sci. Technol.

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Graphene oxide based nickel chromite nanocomposite (GONC) was synthesized via a cost effective chemical co-precipitation method for energy storage applications. As-synthesized nanomaterial was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, an elemental composition diagnostic via energy dispersive spectrscopy, optical properties via raman spectroscopy, bandgap transition measurements via photoluminescence spectroscopy, and electrochemical impedance spectroscopy and cyclic voltammetry to measure electron-transfer resistance and electrochemical active surface area. A grain size value of about 1.55 nm with nickel particles aggregation over graphene oxide surface results in nickel non-homogenous distribution with spherical grains. This leads to structural defects resulting in a downward shift at about 1430 cm −1 as observed via raman spectra. Also, a electrochemical active surface area of 0.08 cm 2 comparable to GCE surface area leads to better conductivity with a decrease in Rct upto 5.4 KΩ. It is therefore considered to be an ideal material with optimized parameters to be synthesized as tested for energy storage applications.

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Section: Resultsmentioning

confidence: 98%

Graphene Oxide/Nickel Chromite Nanocomposite: Optimized Synthesis, Structural and Optical Properties

Shafique

Mahmood

Batool

et al. 2021

ECS J. Solid State Sci. Technol.

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“…Cation distribution in oxide spinels is shown to affect many properties including catalytic activity. 31 Bahlawane et al 32 have found that the catalytic activity of Co 3 O 4 towards oxidation of CO to CO 2 was reduced upon formation of an inversion spinel with heavy doping of Fe. The present work involves the synthesis of Zn 2− x Ga 2 x Sn 1− x O 4 by a solid state reaction.…”

Section: Introductionmentioning

confidence: 99%

Improved catalytic activity on transitioning from inverse to normal spinel in Zn_2−xGa_2xSn_1−xO₄: a robust bifunctional OER and HER electrocatalyst

Parayil,

Gupta,

Garg

et al. 2024

Sustainable Energy Fuels

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“…Hence it is the need of the hour to have promising candidates to mitigate the issue. For this, spinel ferrite nanoparticles have been tremendously used in the treatment of waste water because of the excellent sorption capacity, low toxicity, easy recoverability and reusability for more cycles, desirable band gap and easy availability [9].…”

Section: Introductionmentioning

confidence: 99%

Biofabricated copper ferrite nanoparticles: a potential nanosorbent for the removal of Pb (II) ions from aqueous media

Pillai¹,

Sreelekshmi²,

Meera³

2023

Nanotechnology

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In the present study, we describe a facile strategy for the easy removal of the heavy metal ion, Pb (II) using biosynthesized copper ferrite (CuFe2O4) Nanoparticles (Nps) prepared via a cost-effective and eco-friendly method using Pimenta dioica leaf extract. The structural characterization was performed using UV-Visible, FT-IR, XRD, XPS, TG, SEM - EDS and TEM techniques. Various characterization techniques showed that the biosynthesized CuFe2O4 nanoparticles have spherical shape with minimum aggregation and possess a size range between 7-16 nm. Batch experiments were carried out to analyze the adsorption efficiency of CuFe2O4 Nps by varying different experimental conditions such as pH, adsorbent dose and initial metal ion concentration. From the Atomic Absorption Spectroscopy (AAS) results, the optimum removal efficiency (99.69 %) occurred at a contact time of 90 min in the solution having pH 6 with 0.06 g of nanoadsorbent. The experimental data were analyzed using adsorption isotherm and fitted with kinetic models. In the present study, we report the the highest removal efficiency of 99.69 % for Pb (II) ions with minimum experimental parameters which is greater than other similar reported studies. The novel CuFe2O4 nanosorbent synthesized in the present study is highly effective in eliminating toxic pollutants. They also possess outstanding recycling characteristics for the effective removal of Pb (II) ions from aqueous media.This cost-effective and ecofriendly strategy could be utilized for addressing the emerging water contamination.

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Catalytic and Photocatalytic Properties of Oxide Spinels

Cited by 25 publications

References 126 publications

Graphene Oxide/Nickel Chromite Nanocomposite: Optimized Synthesis, Structural and Optical Properties

Graphene Oxide/Nickel Chromite Nanocomposite: Optimized Synthesis, Structural and Optical Properties

Improved catalytic activity on transitioning from inverse to normal spinel in Zn_2−xGa_2xSn_1−xO₄: a robust bifunctional OER and HER electrocatalyst

Biofabricated copper ferrite nanoparticles: a potential nanosorbent for the removal of Pb (II) ions from aqueous media

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Catalytic and Photocatalytic Properties of Oxide Spinels

Cited by 25 publications

References 126 publications

Graphene Oxide/Nickel Chromite Nanocomposite: Optimized Synthesis, Structural and Optical Properties

Graphene Oxide/Nickel Chromite Nanocomposite: Optimized Synthesis, Structural and Optical Properties

Improved catalytic activity on transitioning from inverse to normal spinel in Zn2−xGa2xSn1−xO4: a robust bifunctional OER and HER electrocatalyst

Biofabricated copper ferrite nanoparticles: a potential nanosorbent for the removal of Pb (II) ions from aqueous media

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About

Improved catalytic activity on transitioning from inverse to normal spinel in Zn_2−xGa_2xSn_1−xO₄: a robust bifunctional OER and HER electrocatalyst