Facile synthesis of ZnFe<sub>2</sub>O<sub>4</sub> photocatalysts for decolourization of organic dyes under solar irradiation

Behera, Arjun; Kandi, Debasmita; Majhi, Sanjit Manohar; Martha, Satyabadi; Parida, Kulamani

doi:10.3762/bjnano.9.42

Cited by 86 publications

(43 citation statements)

References 37 publications

(33 reference statements)

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“…This process involves: (i) generation of renewable energy such as H 2 and O 2 by photoelectrochemical water splitting [30–32], (ii) photocatalytic CO 2 conversion [33–37], (iii) photocatalytic nitrogen (N 2 ) fixation [38], (iv) selective organic transformation for the ﬁne chemical synthesis [39–42] and (v) photodegradation of pollutants [43–49]. Semiconductor-based photocatalysis proceeds through following three steps: (1) absorption of light; (2) separation and transport of charge carriers; and (3) redox reactions on the surface of the semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

Acharya

Naik

Parida

2018

Beilstein J. Nanotechnol.

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107

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Cr(VI) exhibits cytotoxic, mutagenic and carcinogenic properties; hence, effluents containing Cr(VI) from various industrial processes pose threat to aquatic life and downstream users. Various treatment techniques, such as chemical reduction, ion exchange, bacterial degradation, adsorption and photocatalysis, have been exploited for remediation of Cr(VI) from wastewater. Among these, photocatalysis has recently gained considerable attention. The applications of photocatalysis, such as water splitting, CO2 reduction, pollutant degradation, organic transformation reactions, N2 fixation, etc., towards solving the energy crisis and environmental issues are briefly discussed in the Introduction of this review. The advantages of TiO2 as a photocatalyst and the importance of its modification for photocatalytic reduction of Cr(VI) has also been addressed. In this review, the photocatalytic activity of TiO2 after modification with carbon-based advanced materials, metal oxides, metal sulfides and noble metals towards reduction of Cr(VI) was evaluated and compared with that of bare TiO2. The photoactivity of dye-sensitized TiO2 for reduction of Cr(VI) was also discussed. The mechanism for enhanced photocatalytic activity was highlighted and attributed to the resultant properties, namely, effective separation of photoinduced charge carriers, extension of the light absorption range and intensity, increase of the surface active sites, and higher photostability. Advantages and limitations for photoreduction of Cr(VI) over modified TiO2 are depicted in the Conclusion. The various challenges that restrict the technology from practical applications in remediation of Cr(VI) from wastewater were addressed in the Conclusion section as well. The future perspectives of the field presented in this review are focused on the development of whole-solar-spectrum responsive, TiO2-coupled photocatalysts which provide efficient photocatalytic reduction of Cr(VI) along with their good recoverability and recyclability.

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Section: Introductionmentioning

confidence: 99%

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

Acharya

Naik

Parida

2018

Beilstein J. Nanotechnol.

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107

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“…Thus, the main reactive species were the superoxide, the •OH (indirectly produced via superoxide), and ℎ + . This was proved using suitable scavengers for both CaFe2O4 [43] and ZnFe2O4 [45]. The effect of silver decorated nanoparticles was a decrease of the possibility The obtained rate constant for Reactive Blue 250 using Zn 0.5 Ca 0.5 Fe 2 O 4 (sol-gel)/Ag (photodeposition) nanoparticles was similar to the reported value (k = 0.0885 min −1 ) for Reactive Blue 4 using pure anatase nano-TiO 2 under UV light [39].…”

Section: Photodegradation Assaysmentioning

confidence: 94%

Photodeposition of Silver on Zinc/Calcium Ferrite Nanoparticles: A Contribution to Efficient Effluent Remediation and Catalyst Reutilization

et al. 2021

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The efficient photodegradation of textile dyes is still a challenge, especially considering resistant azo dyes. In this work, zinc/calcium mixed ferrite nanoparticles prepared by the sol–gel method were coupled with silver by a photodeposition method to enhance the photocatalytic potency. The obtained zinc/calcium ferrites are mainly cubic-shaped nanoparticles sized 15 ± 2 nm determined from TEM and XRD and an optical bandgap of 1.6 eV. Magnetic measurements indicate a superparamagnetic behavior with saturation magnetizations of 44.22 emu/g and 27.97 emu/g, respectively, for Zn/Ca ferrite and Zn/Ca ferrite with photodeposited silver. The zinc/calcium ferrite nanoparticles with photodeposited silver showed efficient photodegradation of the textile azo dyes C.I. Reactive Blue 250 and C.I. Reactive Yellow 145. Subsequent cycles of the use of the photocatalyst indicate the possibility of magnetic recovery and reutilization without a significant loss of efficiency.

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“…This solution can be modified by compositions and morphologies of the materials. Recently, several mixed metal oxides with spinel structures as photocatalysis applications under solar light irradiation have been discussed for the treatment of organic contaminants in water [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

An improved method for high photocatalytic performance of ZnAl2O4 spinel derived from layered double hydroxide precursor

Putra

2020

SN Appl. Sci.

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A spinel structure of zinc aluminate (ZnAl 2 O 4) particles provides a prospective material for photocatalytic applications. In this work, zinc aluminate spinel was prepared by an anion-exchange method derived from layered double hydroxides (LDHs) followed by thermal treatment. The mechanism, photoactivity, and effects of both anion substitute and temperature have been investigated. The chemical composition, morphologies, phase structures, porous structures and photocatalytic properties of samples were analyzed using thermogravimetric analysis, scanning electron microscopy, energy-dispersive X-ray spectroscopy, powder X-ray diffraction, gas sorption analysis, and ultraviolet-visible spectroscopy in detail. The results of mesoporous α-ZnAl 2 O 4 indicate that average crystallite size, total pore volume, and BET surface area obtain 9.3 nm, 0.337 cm 3 /g, and 206.13 m 2 /g, respectively. Moreover, zinc aluminate spinel shows well phase after heating at 700 °C and LDHs structures were completely collapsed. The photocatalytic performances of α-ZnAl 2 O 4 have been applied in p-nitrophenol reduction under visible light irradiation and required time at least 9 min. Finally, the new improved method constructs an excellent material for pretreatment of liquid pollutants containing high-level concentration at rapid treatment time.

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Facile synthesis of ZnFe₂O₄ photocatalysts for decolourization of organic dyes under solar irradiation

Cited by 86 publications

References 37 publications

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

Photodeposition of Silver on Zinc/Calcium Ferrite Nanoparticles: A Contribution to Efficient Effluent Remediation and Catalyst Reutilization

An improved method for high photocatalytic performance of ZnAl2O4 spinel derived from layered double hydroxide precursor

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Facile synthesis of ZnFe2O4 photocatalysts for decolourization of organic dyes under solar irradiation

Cited by 86 publications

References 37 publications

Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction

Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction

Photodeposition of Silver on Zinc/Calcium Ferrite Nanoparticles: A Contribution to Efficient Effluent Remediation and Catalyst Reutilization

An improved method for high photocatalytic performance of ZnAl2O4 spinel derived from layered double hydroxide precursor

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Product

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Facile synthesis of ZnFe₂O₄ photocatalysts for decolourization of organic dyes under solar irradiation

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction