Photocatalytic activity of cobalt substituted zinc ferrite for the degradation of methylene blue dye under visible light irradiation

Chahar, Deepika; Taneja, S. P.; Bisht, Shalini; Kesarwani, Shubhi; Thakur, Preeti; Thakur, Atul; Sharma, Pooja

doi:10.1016/j.jallcom.2020.156878

Cited by 143 publications

(25 citation statements)

References 27 publications

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“…It suggested that peaks of MB gradually decreased with the reaction time, which stated that MB displayed favorable photodegradation adding ANS catalyst. The photocatalytic performance of ANS catalyst is almost the similar as that of other latest photocatalytic materials (Nd 3+ doped BaAl 2 O 4 59 , cobalt substituted zinc ferrite 60 , N self-doped TiO 2 /ZrO 2 composite 61 , Ag@CdSe/ Zeoilte nanocomposite 62 ). Besides, we investigated the apparent degradation kinetics via firstorder reaction model, and the equation of which is as follows.…”

Section: Photocatalytic Activitysupporting

confidence: 55%

Sliver Doped Sodium Antimonate with Greatly Reduced the Band Gap for Efficiently Enhanced Photocatalytic Activities Under Visible Light (Experiment and DFT Calculation)

et al. 2021

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In this work, Ag doped NaSbO 3 (ANS) was successfully synthesized and applied an efficient visible light photocatalyst. The properties of catalyst were fully characterized, and DFT (the density functional theory) computation was utilized to investigate the photocatalytic mechanism. The various characterization findings proved that Ag atoms were perfectly doped into NaSbO 3 crystals, which greatly reduced the band gap, and made ANS catalyst exhibit excellent visible light absorption performance. In addition, ANS appeared great photocatalytic activities and remarkable stability. Also, electrochemical characterizations illustrated that ANS possessed stronger ability of generating and transferring electrons and holes under visible light, and the doping of Ag atoms reduced the resistance of charge transfer, thus effectively accelerated the photocatalysis reaction. Moreover, through ESR characterization and scavengers coexistent experiments, •OH and •O 2 were considered to be active radicals that played a crucial role in the photodegradation process. Furthermore, DFT calculation demonstrated that ANS displayed obvious visible light excitation performance via reducing the band gap. The improvement of work function enhanced the oxidation ability of photogenerated holes, forming more hydroxyl radicals, thus boosted the photodegradation of pollutants.

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Section: Photocatalytic Activitysupporting

confidence: 55%

Sliver Doped Sodium Antimonate with Greatly Reduced the Band Gap for Efficiently Enhanced Photocatalytic Activities Under Visible Light (Experiment and DFT Calculation)

et al. 2021

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“…In the photocatalytic degradation of organic dyes, the dye molecules are first adsorbed on the surface of the photocatalyst and then participate in the redox reaction. Chahar et al [ 127 ] fabricated Co x Zn 1−x Fe 2 O 4 (x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) for MB degradation. The results showed that Co 0.5 Zn 0.5 Fe 2 O 4 had the highest MB degradation efficiency (77%), which was distinctly higher than that of the undoped ZnFe 2 O 4 .…”

Section: Modification Of Znfe 2 O 4 ...mentioning

confidence: 99%

Progress in the Preparation and Modification of Zinc Ferrites Used for the Photocatalytic Degradation of Organic Pollutants

Zhu

Chen

et al. 2022

IJERPH

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Zinc ferrite is a type of photocatalytic material with high physicochemical stability, narrow band gap, high carrier separation efficiency, high porosity, and paramagnetism, which makes it easy to recover. Thus, zinc ferrite is widely used as a photocatalyst in water treatment. In this paper, the preparation principles as well as the advantages and disadvantages of typical methods used to prepare zinc ferrite including hydrothermal, co-precipitation, sol-gel, and other novel methods such as biosynthesis have been summarized. Modification methods such as elemental doping, composite formation, and morphological modification have been highlighted. Using these modification methods, the catalytic activity of zinc ferrite toward the photocatalytic degradation of organic pollutants in water has been enhanced. Biosynthesis is regarded as a promising preparation method that uses biological materials instead of chemical materials to achieve the large-scale preparation of zinc ferrite using low cost, energy efficient, and environmentally friendly processes. Meanwhile, the combination of multiple modification techniques to enhance the photocatalytic performance of zinc ferrite will be an important research trend in the future.

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“…Regulation and controllable size of zinc ferrite nanoparticles can modify the compositions of zinc ferrite nanoparticles and the occupancies of zinc and iron cations at both of tetrahedral and octahedral sites, and further affect the physic‐chemical properties of obtained substances, as reported for electrochemical sensing and photocatalytic activity etc. [25,26] . Preparing non‐stoichiometric zinc ferrite nanocrystals via hydrothermal route is not easy because zinc ion has amphoteric characteristic that is strongly dependent on the pH values of reaction solution.…”

Section: Introductionmentioning

confidence: 99%

Zinc Ferrite Nanoparticles: Unusual Growth Mechanism for Size‐Dependent Properties

Wang

Zhang

2021

ChemistrySelect

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Herein, non‐stoichiometric zinc ferrite nanoparticles, Zn0.86Fe2.14O4+δ,with grain sizes of being smaller than 11 nm were successfully prepared by varying the hydrothermal reaction duration and temperature. The influence of reaction temperature and time on the grain size of zinc ferrite nanoparticles was investigated. Non‐stoichiometric zinc ferrite nanoparticles underwent distinct processes at different reaction temperatures: at 200 °C, the growth mechanism follows an Ostwald ripening model with activation energy 124.7 kJ/mol, while at 120 °C, the particle growth is governed by aggregation and coalescence, Ostwald ripening mechanism with the activation energy 27.5 kJ/mol and digestive ripening process.The abnormal growth behavior of zinc ferrite nanoparticles is completely different from previous reports on the oxides. Detailed analysis of XPS, XRD, FT‐IR and Mössbauer spectra revealed that the presence of rich iron oxides on the surface of nanoparticles is responsible to the non‐stoichiometry. Moreover, unit cell volume and magnetic property of non‐stoichiometric zinc ferrite exhibited two extremum as the increase of grain size, which was closely related to the grain size‐dependent structure changing. The unusual growth behavior and the size dependent structure and property changes of non‐stoichiometric zinc ferrite nanoparticles reported in this work may be beneficial to guide the future development of magnetic materials.

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Photocatalytic activity of cobalt substituted zinc ferrite for the degradation of methylene blue dye under visible light irradiation

Cited by 143 publications

References 27 publications

Sliver Doped Sodium Antimonate with Greatly Reduced the Band Gap for Efficiently Enhanced Photocatalytic Activities Under Visible Light (Experiment and DFT Calculation)

Sliver Doped Sodium Antimonate with Greatly Reduced the Band Gap for Efficiently Enhanced Photocatalytic Activities Under Visible Light (Experiment and DFT Calculation)

Progress in the Preparation and Modification of Zinc Ferrites Used for the Photocatalytic Degradation of Organic Pollutants

Zinc Ferrite Nanoparticles: Unusual Growth Mechanism for Size‐Dependent Properties

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