Nanoparticles of ZnO Doped With Mn: Structural and Morphological Characteristics

Mn x -ZnO (1-x) nanopowders were successfully synthesised through a simple sol-gel method. The samples were annealed at 300 C to enhance their crystallinity. The lattice structure, morphology and optical properties of the prepared powdered samples were extensively studied using different characterization techniques, confirming the formation of Mn x -ZnO (1-x) . The inclusion of Mn did not cause any change to the wurtzite structure of ZnO; however slight peak shifting and increase in lattice parameters were indicated. The normal absorption spectra pointed to a cut-off edge extending beyond the UV region and a Burstein-Moss type band gap broadening induced by the Mn doping. ZnO showed excellent photodegradation activity against methylene blue (MB) upon UV irradiation. Intensifying the dopant concentration resulted in further diminution of photoactivity against MB. This reduction of photocatalytic activity of ZnO upon doping can be drawn to be due to the presence of Mn in the ZnO lattice, which acted as recombination sites for the photogenerated charge carriers.The results demonstrated that doping ZnO with Mn can be used to suppress the oxidative stress induced by reactive oxygen species (ROS) through generation of recombination centres. The suppression of toxic ROS generation implies possible application in fabrics and ointments for UV shielding applications.

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“…Similar correlation of lattice parameters with Mn content doping has been reported in literature [36,37,38].…”

Section: Structural Propertiessupporting

confidence: 89%

Reduction of hazardous reactive oxygen species (ROS) production of ZnO through Mn inclusion for possible UV-radiation shielding application

Lefatshe

Mola

Muiva

2020

Heliyon

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“…The synthesized C. papaya-Mn-Zn NPs shows nanosheet structure and as seen in Figure 4, very small particles coexist with massive aggregates. The nanosheet morphology of ZnO-doped Mn NPs was also observed by Maria et al [33]. The average particle size of synthesized C. papaya-Mn-Zn NPs was found to be 103 nm.…”

Section: Sem-edxsupporting

confidence: 75%

Phyto Synthesis of Manganese-Doped Zinc Nanoparticles Using Carica papaya Leaves: Structural Properties and Its Evaluation for Catalytic, Antibacterial and Antioxidant Activities

et al. 2022

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The current study aims to synthesize bimetal oxide nanoparticles (zinc and manganese ions) using the carica papaya leaf extract. The crystallite size of the nanoparticle from X-ray diffraction method was found to be 19.23 nm. The nanosheet morphology was established from Scanning Electron Microscopy. Energy-dispersive X-ray diffraction was used to determine the elemental content of the synthesized material. The atomic percentage of Mn and Zn was found to be 15.13 and 26.63. The weight percentage of Mn and Zn was found to be 7.08 and 10.40. From dynamic light scattering analysis, the hydrodynamic diameter and zeta potential was found to be 135.1 nm and −33.36 eV. The 1,1-diphenyl-2-picryl hydroxyl radical, hydroxyl radical, FRAP, and hydrogen peroxide scavenging tests were used to investigate the antioxidant activity of Mn-Zn NPs. Mn-Zn NPs have substantial antioxidant properties. The photocatalytic activity of the Mn-Zn NPs was assessed by their ability to degrade Erichrome black T (87.67%), methyl red dye (78.54%), and methyl orange dye (69.79%). Additionally, it had significant antimicrobial action S. typhi showed a higher zone of inhibition 14.3 ± 0.64 mm. Mn-Zn nanoparticles were utilized as a catalyst for p-nitrophenol reduction. The bimetal oxide Mn-Zn NPs synthesized using C. papaya leaf extract exhibited promising dye degradation activity in wastewater treatment. Thus, the aforementioned approach will be a novel, low cost and ecofriendly approach.

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“…Agglomeration of small crystallites also seems to be present in certain regions on the film surface. The film deposited at Mg doped has smooth and spindle like structure and uniformly covering the overall surfaces with good adherence [23,24]. The SEM image of Mn doped ZnO thin film shows the grains of spindle like shape without any cracks and pores.…”

Section: Resultsmentioning

confidence: 97%

Micro-structural, Morphological and Optical Properties of Pure and Metal (Mn & Mg) Doped ZnO Thin Films by Low Cost SILAR Method

Devi¹,

Selvan²,

Karunakaran

et al. 2019

Asian J. Chem.

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Pure and metals (Mn & Mg) doped zinc oxide (ZnO, ZnO/Mn and ZnO/Mg) thin films have been successfully grown onto a glass substrates by low cost SILAR method. The structural, morphological, compositional, functional group and optical properties of the prepared films were studied using X-ray diffraction, scanning electron microscope and EDAX, FTIR and UV-visible spectrophotometer, respectively. The structure of the films were found to be hexagonal with polycrystalline in nature with preferential orientation along (002) plane. From Fourier Transform Infrared spectroscopy, the presence of functional groups and its corresponding molecular vibrations were assessed. In UV-visible spectroscopy, the obtained direct optical band gap values 3.46, 3.56 and 3.7 eV for pure, Mn and Mg doped ZnO thin films, respectively. Morphological results showed that the remarkable changes in morphology due to the effect of metal doping. EDAX studies showed that the presence of zinc and oxygen content and also a doping metal ions.

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Nanoparticles of ZnO Doped With Mn: Structural and Morphological Characteristics

Cited by 18 publications

References 22 publications

Reduction of hazardous reactive oxygen species (ROS) production of ZnO through Mn inclusion for possible UV-radiation shielding application

Reduction of hazardous reactive oxygen species (ROS) production of ZnO through Mn inclusion for possible UV-radiation shielding application

Phyto Synthesis of Manganese-Doped Zinc Nanoparticles Using Carica papaya Leaves: Structural Properties and Its Evaluation for Catalytic, Antibacterial and Antioxidant Activities

Micro-structural, Morphological and Optical Properties of Pure and Metal (Mn & Mg) Doped ZnO Thin Films by Low Cost SILAR Method

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