Magnetic Properties of the Dilute Magnetic Semiconductor Zn1-xCoxO Nanoparticles

Robkhob, Prissana; Tang, I‐Ming; Thongmee, Sirikanjana

doi:10.1007/s10948-019-5135-z

J Supercond Nov Magn

2019

DOI: 10.1007/s10948-019-5135-z

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Magnetic Properties of the Dilute Magnetic Semiconductor Zn1-xCoxO Nanoparticles

Prissana Robkhob

I‐Ming Tang

Sirikanjana Thongmee

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Cited by 8 publications

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“…The amount of substance for preparation of Mn 3 O 4 /x%GO nanocomposites The solubility drops and the nanoparticles precipitate out[66] 3.9550 g of KMnO 4 was dissolved in 70 ml of deionized water while being stirred. Then, 13.2 ml of hydrazine hydrate (80% wt%) was added into the solution drop by drop.…”

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Enhancement of photocatalytic by Mn3O4 spinel ferrite decorated graphene oxide nanocomposites

et al. 2021

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The hydrothermal process was used to prepare Mn3O4/x%GO nanocomposites (NC’s) having different ratios of the Mn3O4 nanoparticles (NP’s) on the surface of graphene oxide (GO) sheet. SEM image showed that the Mn3O4 NP’s were distributed over the surface of GO sheet. HRTEM images exhibited the lattice fringe arising from the (101) plane of the Mn3O4 NP’s having the interplanar d-spacing of 0.49 nm decorating on the surface of GO. The electronic absorption spectra of Mn3O4/x%GO NC’s also show broad bands from 250 to 550 nm. These bands arise from the d–d crystal field transitions of the tetrahedral Mn3+ species and indicate a distortion in the crystal structure. Photo-catalytic activity of spinel ferrite Mn3O4 NP’s by themselves was low but photo-catalytic activity is enhanced when the NP’s are decorating the GO sheet. Moreover, the Mn3O4/10%GO NC’s showed the best photo-catalytic activity. This result comes from the formation of Mn–O–C bond that confirm by FT-IR. This bond would facilitate the transfer of the photoelectrons from the surfaces of the NP’s to the GO sheets. PL emission which is in the violet–red luminescent region shows the creation of defects in the fabricated Mn3O4 NP’s nanostructures. These defects create the defect states to which electrons in the VB can be excited to when the CB. The best degradation efficiency was achieved by the Mn3O4 NP’s when they were used to decorate the GO sheets in the Mn3O4/10%GO NC’s solution. Highlights Lattice fringe of Mn3O4 with an interplanar d-spacing of 0.49 nm for (101) plane. Photocatalytic activity of spinel ferrite Mn3O4 nanoparticles by itself is low. Number of photoelectrons created depends on number of Mn3O4 on a given area of GO The bonding of the Mn3O4 to the GO sheet would be though a Mn–O–C junction. The degradation processes were accelerated by Mn3O4/10%GO nanocomposites Graphic abstract

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Enhancement of photocatalytic by Mn3O4 spinel ferrite decorated graphene oxide nanocomposites

et al. 2021

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Structure, optical and ferromagnetic properties of Zn1−x−yMnxCryO nanoparticles diluted magnetic semiconductors synthesized by citrate sol–gel method

2021

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Enhanced photocatalytic activity and ferromagnetic ordering in hydrogenated Zn1−xCoxO

Petrov,

Dang,

et al. 2024

J Mater Sci

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Magnetic Properties of the Dilute Magnetic Semiconductor Zn1-xCoxO Nanoparticles

Cited by 8 publications

References 19 publications

Enhancement of photocatalytic by Mn3O4 spinel ferrite decorated graphene oxide nanocomposites

Enhancement of photocatalytic by Mn3O4 spinel ferrite decorated graphene oxide nanocomposites

Structure, optical and ferromagnetic properties of Zn1−x−yMnxCryO nanoparticles diluted magnetic semiconductors synthesized by citrate sol–gel method

Enhanced photocatalytic activity and ferromagnetic ordering in hydrogenated Zn1−xCoxO

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