Enhanced visible-light photocatalytic activity of samarium-doped zinc oxide nanostructures

Sukriti,; Chand, Prakash; Singh, Vishal

doi:10.1016/j.jre.2019.02.009

Cited by 54 publications

(15 citation statements)

References 38 publications

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“…Under visible light irradiation, Sm doped ZnO nanostructures have the highest efficiency for photodegradation (94.4%) for Methylene blue dye. ZnO doped with the rare-earth metal ion (Sm 3+ ), the efficiency increases by approximately 6.98 times [81].…”

Section: Rafas-2021 Journal Of Physics: Conference Series 2267 (2022)...mentioning

confidence: 99%

A mini-review on rare earth metal doped ZnO nanomaterials for photocatalytic remediation of waste water

Kumar

Dosanjh

2022

J. Phys.: Conf. Ser.

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The mineralization and degradation of organic compounds present in waste water by heterogeneous photocatalysis has gained wide attention due to its effectiveness and tenancy to utilize UV-Visible solar light spectrum. The chemical stability, non-toxic character, magnificent electrical and optical properties have been recognized the ZnO as useful material for waste water treatment in environmental remediation technology. However, photocatalytic activity of ZnO limited to ultraviolet region because of its wide band gap (3.37eV). ZnO wide band gap obstruct photo-excitation for actual photocatalytic applications under abundant, safe and clean solar energy source. Many methods have been evolved in last decades to overcome this barrier. ZnO surfaces have been tailored with rare-earth metals to enhance its optical, surface and photocatalytic properties by different research groups. The doping with rare-earth metal ions enhanced the efficiency of ZnO photocatalyst by reducing band gap and shifted the absorbed wavelength to the visible region. This review paper compiles the attempts on modification of ZnO and their effect on photocatalytic activities by using rare earth metals.

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Section: Rafas-2021 Journal Of Physics: Conference Series 2267 (2022)...mentioning

confidence: 99%

A mini-review on rare earth metal doped ZnO nanomaterials for photocatalytic remediation of waste water

Kumar

Dosanjh

2022

J. Phys.: Conf. Ser.

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“…Also, the efficiency of removing methylene blue (96.84%) was higher than methyl blue (90.05%) [98]. Moreover, Samarium [99] and Strontium [100] were used to enhance the photocatalytic activity of ZnO. https://www.indjst.org/…”

Section: Doped Zno Nanostructures For Dye Removalmentioning

confidence: 99%

Zinc Oxide Nanostructures in the Textile Industry

Nisansala¹,

Rajapaksha²,

Dikella³

et al. 2021

IJST

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Background:The zinc oxide nanostructures have been using in the textile industry since the early 2000s. However, the efficiency of dye removal, antibacterial and UV protection were enhanced by researchers using different techniques. Objective: This review focuses on the latest research of dye removal, UV protection and antibacterial activity with mechanisms, to discover the most efficient methods to apply ZnO nanostructures effectively for the textile industry. Findings: The photocatalytic activity and photosensitivity of ZnO nanostructures were enhanced by doping materials such as Cu, Fe 2 O 3 , Co, Ce, Al, and Mn. The UV protection of ZnO nanostructures was efficient even with low loading percentages and effectively retained in the textiles. However, the dye removal efficiency was increased with pH due to the high concentration of hydroxyl radicals in the media. Although the UV protection ability of ZnO nanostructures in the textile industry was hindered by photocatalytic activity, scientists had overcome this issue by doping impurities such as SiO 2 , cobalt, and manganese. The antibacterial properties of ZnO nanostructures were changed according to the loaded amount of zinc oxide nanostructures on the textile surface. In most of the research, Escherichia coli and Staphylococcus aureus were used as test organisms to study the antibacterial property of ZnO nanostructures. The green synthesis of ZnO nanostructures is more favorable for all applications due to their nontoxicity and eco-friendly nature.

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“…Zn 2P of ZnO, the difference in binding energy between Zn 2p1/2 (1044.69 eV) and Zn 2P3/2 (1021.64 eV) is found around23.05 eV which con rms that Zn is present in Zn 2+ oxidation state ( gure 7b)[68]. When Sm is added, this difference changes slightly to around 23.11 eV and both Zn 2p1/2 (1044.45 eV) and Zn 2P3/2 (1021.34 eV) peaks shift to lower binding energies corresponds to the electronic interactions of Sm with the lattice ( gure 7b)[68].…”

mentioning

confidence: 92%

“…Among rare-earth elements, samarium (Sm) has gained considerable attention among researchers in recent times, because Sm 3+ ions act as effective luminescent and trapping sites of the charge carriers in ZnO nanoparticles which makes them suitable for optoelectronic and photocatalytic applications [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Improved Luminescence and Photocatalytic Proprieties of Sm3+-doped ZnO Nanoparticles Via Modified Sol-Gel Route: An Unified Experimental and DFT+U Approach

Ayon¹,

Hasan²,

Billah³

et al. 2021

Preprint

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In the current study, a modified sol-gel route was followed to produce undoped and Sm3+ doped (1, 3 and 5 mol %) nanoparticles. The study of opto-structural properties of Sm3+ doped NPs was carried out both experimentally and theoretically. Complete dissolution of Sm3+ ions into the ZnO lattice was obvious from XRD analysis. Morphological evolution with doping was studied using FESEM and TEM. XPS was carried out to confirm the presence of Sm3+ on the surface of the doped NPs. Increasing dopant quantity resulted in a red shift of the NPs along with a reduction in band gap with increasing absorption in the visible range, and a minimum of 3.18 eV of optical band gap for Zn0.97Sm0.03O was found. Photoluminescence spectroscopy revealed a drop in the recombination rate of electron-hole with increasing doping till 3 mole %, followed by an increase for Zn0.95Sm0.05O. Photogenerated electron-hole pair recombination was revealed by the orange band in the luminescence spectra. Theoretical analysis was also carried out with density function theory (DFT). This work also unfolds the fundamental understanding of the structural properties of the synthesized NPs to enhance photocatalytic activity successfully. Later, photocatalytic activity for the optimum composition i.e., 3 mole percent, was assessed experimentally.

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Enhanced visible-light photocatalytic activity of samarium-doped zinc oxide nanostructures

Cited by 54 publications

References 38 publications

A mini-review on rare earth metal doped ZnO nanomaterials for photocatalytic remediation of waste water

A mini-review on rare earth metal doped ZnO nanomaterials for photocatalytic remediation of waste water

Zinc Oxide Nanostructures in the Textile Industry

Improved Luminescence and Photocatalytic Proprieties of Sm3+-doped ZnO Nanoparticles Via Modified Sol-Gel Route: An Unified Experimental and DFT+U Approach

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Enhanced visible-light photocatalytic activity of samarium-doped zinc oxide nanostructures

Cited by 54 publications

References 38 publications

A mini-review on rare earth metal doped ZnO nanomaterials for photocatalytic remediation of waste water

A mini-review on rare earth metal doped ZnO nanomaterials for photocatalytic remediation of waste water

Zinc Oxide Nanostructures in the Textile Industry

­Improved Luminescence and Photocatalytic Proprieties of Sm3+-doped ZnO Nanoparticles Via Modified Sol-Gel Route: An Unified Experimental and DFT+U Approach

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Product

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Improved Luminescence and Photocatalytic Proprieties of Sm3+-doped ZnO Nanoparticles Via Modified Sol-Gel Route: An Unified Experimental and DFT+U Approach