Excellent Photocatalytic degradation of Methylene Blue, Rhodamine B and Methyl Orange dyes by Ag-ZnO nanocomposite under natural sunlight irradiation

Stanley, R.; Jebasingh, J. Alphas; Vidyavathy, S. Manisha; Stanley, P. Kingston; Ponmani, P.; Shekinah, M.E.; Vasanthi, J.

doi:10.1016/j.ijleo.2021.166518

Cited by 44 publications

(5 citation statements)

References 14 publications

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“…Whereas, the stretching vibration Zn-O was exhibited with the weak peak at 470 cm −1 [46]. Additionally, the broad adsorption bands at around 3400 and 1509 cm −1 were ascribed to O-H stretching vibration of adsorbed water molecules on Ag-ZnO [47]. The appearance of peaks at 1636 and 1404 cm −1 could be imputed to the C=O vibration in absorbed CO 2 [48,49].…”

Section: Physiochemical Analysismentioning

confidence: 94%

Preparation of carnation-like Ag-ZnO composites for enhanced photocatalysis under visible light

Mac

Nguyen

et al. 2023

Nanotechnology

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Carnation-like ZnO was synthesized by the facile precipitation method (at room temperature and in 120 min) to decompose dyes in an aqueous medium. The carnation-like ZnO had a stratified porous structure with a size of about 2-3 μm, its petals had a smooth surface with a thickness of 5-10 nm and a width of about 300-500 nm. Ag-ZnO composites were synthesized using glucose with the assistance of PVP. The morphology of Ag-ZnO composites was almost unchanged compared to ZnO. Where, the Ag nanoparticles in the size range of 5 to 15 nm were uniformly dispersed on the ZnO petals, improving the catalytic ability of the composites in tartrazine (TA) degradation. The influence of Ag content on catalytic structure and performance of composite was studied. The 5Ag-ZnO sample had the highest BET surface area and pore volume and the lowest gap energy (Eg) among the as-synthesized samples. The 5Ag-ZnO sample proclaimed the degradation efficiency (DE) in 70 min of 97.8% and the kap of 0.031 min-1. The influences of catalyst content, solution pH, and concentration of dye on the photodegradation efficiency of the composite were thoroughly studied. Besides, the photocatalytic activity of the composite was demonstrated by degrading various organic substances and reusability. In addition, it was compared to a metal-semiconductor catalyst of Au-ZnO and semiconductor-semiconductor catalysts of MoS2-ZnO, Cu2O-ZnO, and SiO2-ZnO. The catalytic mechanism under visible light was proposed.

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Section: Physiochemical Analysismentioning

confidence: 94%

Preparation of carnation-like Ag-ZnO composites for enhanced photocatalysis under visible light

Mac

Nguyen

et al. 2023

Nanotechnology

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“…The results were contrasted to dye degradation efficiency obtained using only iron oxide nanoparticles, as shown in Figure 6 . Silver nitrate (SN), isopropanol alcohol (IPA), ascorbic acid (AA), and ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) were used to detect e − , •OH, •O 2 − , and h + scavenging activity [ 55 ]. MB dye degradation efficiency by the as-prepared iron oxide nanoparticles decreases from 66.7–55.5% to 10.8–7.2% (SN), 22.9–19.7% (AA), 58.4–43.4% (EDTA), and 13.9–8.1% (IPA).…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Capping Agents on the Structural, Optical, and Photocatalytic Degradation Efficiency of Magnetite (Fe3O4) Nanoparticles

Mbuyazi

Ajibade

2023

Nanomaterials

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Octylamine (OTA), 1-dodecanethiol (DDT), and tri-n-octylphosphine (TOP) capped magnetite nanoparticles were prepared by co-precipitation method. Powder X-ray diffraction patterns confirmed inverse spinel crystalline phases for the as-prepared iron oxide nanoparticles. Transmission electron microscopic micrographs showed iron oxide nanoparticles with mean particle sizes of 2.1 nm for Fe3O4-OTA, 5.0 nm for Fe3O4-DDT, and 4.4 nm for Fe3O4-TOP. The energy bandgap of the iron oxide nanoparticles ranges from 2.25 eV to 2.76 eV. The iron oxide nanoparticles were used as photocatalysts for the degradation of methylene blue with an efficiency of 55.5%, 58.3%, and 66.7% for Fe3O4-OTA, Fe3O4-DDT, and Fe3O4-TOP, respectively, while for methyl orange the degradation efficiencies were 63.8%, 47.7%, and 74.1%, respectively. The results showed that tri-n-octylphosphine capped iron oxide nanoparticles are the most efficient iron oxide nano-photocatalysts for the degradation of both dyes. Scavenger studies show that electrons (e−) and hydroxy radicals (•OH) contribute significantly to the photocatalytic degradation reaction of both methylene blue and methyl orange using Fe3O4-TOP nanoparticles. The influence of the dye solution’s pH on the photocatalytic reaction reveals that a pH of 10 is the optimum for methylene blue degradation, whereas a pH of 2 is best for methyl orange photocatalytic degradation using the as-prepared iron oxide nano-photocatalyst. Recyclability studies revealed that the iron oxide photocatalysts can be recycled three times without losing their photocatalytic activity.

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“…The green luminescence band is related to oxygen vacancies. [19] It can be observed that the UV and barycenter (Green) emissions are shifted from 388 to 414 nm which contains more Co ions. Also, as S2 and S3 with high molar fraction of cobalt show the green emission at 554 nm for S4, shifted at 584 for S5 related to O 2-→Co 3+ charge transfer [20].…”

Section: 3photoluminescence Spectroscopy Analysismentioning

confidence: 97%

Synthesis and characterization of MgZnCo ternary mixed metal oxide by the sonochemical method for solid hydrogen storage

HARRAT,

SAHLI,

SETTAR

et al. 2023

ICAENS

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In the present investigation, MgZnCo ternary nanocomposites were developed via a one-step sonochemical technique. The nanocomposite was characterized using structural and optical methods. The formation of different crystalline nanocomposite phases (MgO, ZnO, and Co3O4), and a binary phase (Mg-Zn) has been confirmed by X-ray diffraction. Also, it was indicated that varying of Co molar ratio had an impact on the average sizes of the nanoparticles. SEM showed octahedron-shaped nanoparticle morphology with different average sizes for the nanocomposites prepared. Photoluminescence analysis showed the presence of green and ultraviolet emissions, with green luminescence bands being most often observed. with the intention of discovering samples with suitable structural and optical properties for future solid hydrogen storage applications.

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Excellent Photocatalytic degradation of Methylene Blue, Rhodamine B and Methyl Orange dyes by Ag-ZnO nanocomposite under natural sunlight irradiation

Cited by 44 publications

References 14 publications

Preparation of carnation-like Ag-ZnO composites for enhanced photocatalysis under visible light

Preparation of carnation-like Ag-ZnO composites for enhanced photocatalysis under visible light

Influence of Different Capping Agents on the Structural, Optical, and Photocatalytic Degradation Efficiency of Magnetite (Fe3O4) Nanoparticles

Synthesis and characterization of MgZnCo ternary mixed metal oxide by the sonochemical method for solid hydrogen storage

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