Photocatalytic degradation of methyl orange on the novel hetero-system La2NiO4/ZnO under solar light

Lahmar, H.; Benamira, M.; Douafer, S.; Messaadia, L.; Boudjerda, Abdelhamid; Trari, M.

doi:10.1016/j.cplett.2020.137132

Cited by 56 publications

(11 citation statements)

References 29 publications

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“…The photodegradation of RR195 and MO dyes over the fabricated zinc oxide nanoparticles has been compared with other catalysts reported in the literature as shown in Table 6. The tabulated data show that the catalyst type, degradation percentage, time, and the other conditions for the photodegradation of RR195 and MO dyes [44][45][46][47][48][49][50][51][52][53][54][55][56].…”

Section: Comparison Of Photodegradation Of Rr195 and Mo Dyes With Other Catalystsmentioning

confidence: 99%

Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

Ali

Ahmed

Amin

et al. 2021

J Inorg Organomet Polym

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We are pleased to submit the attached original research article entitled "Auto-combustion fabrication and optical properties of zinc oxide nanoparticles for degradation of reactive red 195 and methyl orange dyes" for consideration for publication as a research article Journal of Inorganic and Organometallic Polymers and Materials.In this manuscript, zinc oxide nanoparticles were synthesized using an auto-combustion technique with fuels (tartaric acid and citric acid) according to the rule of the combustion method. the obtained zinc oxide nanoparticles were studied using various tools such XRD, DRS, TEM and FTIR.The results of XRD confirmed that the formation of the hexagonal structure of the synthesized zinc oxide after calcination at 500 o C. The extracted data from XRD and TEM techniques showed that the crystallite size of the fabricated zinc oxide nanoparticles determined to be 24-39 nm. The direct band gap, lattice parameters, unit cell volume (V), the dislocation density (D) and the Zn-O bond length (L) of the synthesized zinc oxide were determined. The values of the lattice parameters (a and c), the ratio (c/a), unit cell volume (V) and Zn-O bond length (L) were determined and found in the range of 3.2333-

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Section: Comparison Of Photodegradation Of Rr195 and Mo Dyes With Other Catalystsmentioning

confidence: 99%

Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

Ali

Ahmed

Amin

et al. 2021

J Inorg Organomet Polym

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“…It produces directional motion on the biochar to avoid simple recombination with photogenerated holes h + . The photo-generated holes [ 39 ] h + have strong oxidizing properties and react with water molecules to generate •OH and H + . The photogenerated electron e can stimulate the graphene-like structure and the carbon quantum dots to react with oxygen in the water to make it negatively charged to produce •

and CR − .…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Zhang

Wang

et al. 2021

Nanomaterials

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A novel nano-β-FeOOH/Fe3O4/biochar composite with enhanced photocatalytic performance and superparamagnetism was successfully fabricated via an environmentally friendly one-step method. The structural properties of the prepared composite were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, and a vibrating sample magnetometer. The XPS spectrum of the as-prepared composites confirmed the presence of Fe-O-C bonds between β-FeOOH and biochar, which could be conducive to transfer photo-generated electrons. UV-vis spectroscopy confirmed the existence of an electron–hole connection between β-FeOOH and biochar, which promoted the rapid interface transfer of photogenerated electrons from β-FeOOH to biochar. These novel structures could enhance the response of biochar to accelerate the photoelectrons under visible light for more free radicals. Electron spin resonance analysis and free radical quenching experiments showed that •OH was the primary active species in the photodegradation process of methyl orange by nano-β-FeOOH/Fe3O4/biochar. In the synergistic photocatalytic system, β-FeOOH/Fe3O4/biochar exhibited excellent catalytic activity for the degradation of azo dye (methyl orange), which is 2.03 times higher than that of the original biochar, while the surface area decreased from 1424.82 to 790.66 m2·g−1. Furthermore, β-FeOOH/Fe3O4/biochar maintained a stable structure and at least 98% catalytic activity after reuse, and it was easy to separate due to its superparamagnetism. This work highlights the enhanced photocatalytic performance of β-FeOOH/Fe3O4/biochar material, which can be used in azo dye wastewater treatment.

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“…According to the Kubelka-Munk function [44], the band gap (Eg) is determined from the absorption spectra using equation as follows: To further study the mechanism of improving photocatalysis and the mechanism of plasma modification, more characterization methods were used. The ultraviolet-visible diffuse reflectance spectroscopy (DRS) was used to characterize the degree of electron-hole pairs generated by the samples and the band gap width.…”

Section: Photocatalytic Degradation Kineticsmentioning

confidence: 99%

“…In addition, the process of centrifugation, washing and drying will also cause sample loss, so it is reasonable to maintain a degradation rate close to 90% after 5 cycles. According to the Kubelka-Munk function [44], the band gap (E g ) is determined from the absorption spectra using equation as follows:…”

Section: Cycle Experimentsmentioning

confidence: 99%

Enhancing Photocatalytic Activity of ZnO Nanoparticles in a Circulating Fluidized Bed with Plasma Jets

Huang

Hong

et al. 2021

Catalysts

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In this work, zinc oxide (ZnO) nanoparticles were modified in a circulating fluidized bed through argon and hydrogen (Ar–H) alternating-current (AC) arc plasma, which shows the characteristics of nonequilibrium and equilibrium plasma at the same time. In addition, a circulating fluidized bed with two plasma jets was used for cyclic processing. The catalytic degradation performance on Rhodamine B (Rh B) by Ar–H plasma-modified ZnO and pure ZnO was tested in aqueous media to identify the significant role of hydrogen atoms in Rh B degradation mechanism. Meanwhile, the effects of plasma treatment time on the morphology, size and photocatalytic performance of ZnO were also investigated. The results demonstrated that ZnO after 120-min treatment by Ar–H plasma showed Rh B photocatalytic degradation rate of 20 times greater than that of pure ZnO and the reaction follows a first kinetics for the Rh B degradation process. Furthermore, the photocatalyst cycle experiment curve exhibited that the modified ZnO still displays optimum photocatalytic activity after five cycles of experiment. The improvement of photocatalytic activity and luminescence performance attributes to the significant increase in the surface area, and the introduction of hydrogen atoms on the surface also could enhance the time of carrier existence where the hydrogen atoms act as shallow donors.

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Photocatalytic degradation of methyl orange on the novel hetero-system La2NiO4/ZnO under solar light

Cited by 56 publications

References 29 publications

Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

Auto-combustion Fabrication and Optical Properties of Zinc Oxide Nanoparticles for Degradation of Reactive Red 195 and Methyl Orange Dyes

Photocatalytic Activity of Magnetic Nano-β-FeOOH/Fe3O4/Biochar Composites for the Enhanced Degradation of Methyl Orange Under Visible Light

Enhancing Photocatalytic Activity of ZnO Nanoparticles in a Circulating Fluidized Bed with Plasma Jets

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