Structural, magnetic and optical properties of ZnO nanostructures converted from ZnS nanoparticles

Patel, Prayas Chandra; Ghosh, Surajit; Srivastava, Prabhat Kumar

doi:10.1016/j.materresbull.2016.05.005

Cited by 23 publications

(6 citation statements)

References 29 publications

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“…The peaks at 32ᵒ, 56ᵒ and 67ᵒ correspond to the wurtzite ZnS phase with (101), (112) and (104) orientation, respectively [21]. Additionally, the peaks at 48ᵒ and 63ᵒare related, the former, with the ZnS phase with (110) orientation and the ZnO phase with (102) orientation, and the latter, with the ZnO phase with (103) orientation [17,19,20].…”

Section: 1mentioning

confidence: 96%

“…The high intensity of the peak centred at 36ᵒ is characteristic of the wurtzite ZnO phase, with (101) orientation [19], which is the most abundant phase of the sample. Another ZnO characteristic peak is the one roughly centred at 34ᵒ, corresponding to the (002) orientation [20]. The peaks at 32ᵒ, 56ᵒ and 67ᵒ correspond to the wurtzite ZnS phase with (101), (112) and (104) orientation, respectively [21].…”

Section: 1mentioning

confidence: 99%

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Cathodoluminescence characterization of Zno/Zns nanostructures anodized under hydrodynamic conditions

Sanz-Marco

Sánchez-Tovar

Bajo

et al. 2018

Electrochimica Acta

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ZnO/ZnS nanostructures were successfully synthesized by a simple electrochemical anodization of zinc in a glycerol based electrolyte containing sulfide-ammonium fluoride. The influence of different hydrodynamic conditions and anodization potentials during anodization on the morphological and electronic properties of the obtained ZnO/ZnS nanostructures was studied. The anodized samples were characterized using confocal Raman microscopy, X-Ray Diffraction (XRD), Field Emission Scanning Electronic Microscopy (FE-SEM), cathodoluminescence (CL), and photoelectrochemical water splitting tests under standard AM 1.5 conditions. The results showed that hydrodynamic conditions and higher potentials promoted the formation of ZnO/ZnS nanotubes with both higher sulphur content and crystalline defect density, which reduces the near band edge transition value of the materials and improves the photoelectrochemical activity for water splitting. Additionally, the higher photocurrent densities for water splitting were obtained for the samples anodized at the highest anodization potential and under hydrodynamic conditions, increasing in a 2 71% for the nanostructures anodized at 1000 rpm when the anodization potential changes from 20 to 40V.

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Section: 1mentioning

confidence: 96%

Section: 1mentioning

confidence: 99%

Cathodoluminescence characterization of Zno/Zns nanostructures anodized under hydrodynamic conditions

Sanz-Marco

Sánchez-Tovar

Bajo

et al. 2018

Electrochimica Acta

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“…The high intensity of the peak centered at 36° is characteristic of the wurtzite ZnO phase, with an orientation of (101) [80], which is the most abundant phase of the heterostructures. Another ZnO characteristic peak is the one roughly centered at 34°, which corresponds to the orientation (002) [81]. The peaks at 32°, 56° and 67° are associated with the wurtzite ZnS phase with the orientations (101), (112) and (104), respectively [81].…”

Section: Crystalline Structure Characterizationmentioning

confidence: 99%

“…Another ZnO characteristic peak is the one roughly centered at 34°, which corresponds to the orientation (002) [81]. The peaks at 32°, 56° and 67° are associated with the wurtzite ZnS phase with the orientations (101), (112) and (104), respectively [81]. Besides, the peaks centered at 48° and 63° are related, the former, with the ZnS phase with an orientation of (110) and the ZnO phase with an orientation of (102), and the latter, with the ZnO phase with an orientation of (103) [74,80,81].…”

Section: Crystalline Structure Characterizationmentioning

confidence: 99%

Fabrication of Ordered and High-Performance Nanostructured Photoelectrocatalysts by Electrochemical Anodization: Influence of Hydrodynamic Conditions

Lucas-Granados¹,

Sánchez-Tovar²,

Domene³

et al. 2019

Nanostructures in Energy Generation, Transmission and Storage

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Nanostructured semiconductor metal oxides, such as TiO 2 , WO 3 , Fe 2 O 3 or ZnO, are being widely investigated for their use as photoanodes, due to their higher surface areas in contact with the electrolyte, which increases the efficiency of photoelectrochemical processes. Metal oxide nanostructures have been synthesized by a number of different techniques. Anodization is one of the simpler methods used to synthesize nanostructured photoanodes, and the morphology and size of nanostructures can be designed by adequately controlling anodization parameters. Besides, these nanostructures are directly bound to the metallic back contact, improving significantly the efficiency of electron collection. It has been observed that hydrodynamic conditions during anodization (using a rotating disk electrode, RDE) greatly influenced the morphology of nanostructures and, therefore, their photoelectrochemical performance. The objective of this chapter is to review the innovative nanostructures with highaspect ratios that can be fabricated by anodization under different hydrodynamic conditions.

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“…Properties of nanoparticles are in fact given by many factors (e.g. size, shape, amounts of defects in crystal structure and chemical composition) [21][22][23]. For these reasons, the appropriate preparation method is very important.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnS nanoparticles of required size by precipitation in aerosol microdroplets

Bednář

Svoboda

Mančík

et al. 2019

Materials Science and Technology

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Zinc sulphide (ZnS) nanoparticles were prepared by an aerosol method from zinc acetate and sodium sulphide (Na2S) aqueous solutions. Aqueous solution of zinc acetate was dispersed into the form of microdroplets, which were introduced by airflow to vigorously stirred aqueous solution of Na2S, which was in excess. Microdroplets served as microreactors, so the reaction took place only in limited volume. Particle size distribution was studied by transmission electron microscopy and by dynamic light scattering measurements. In this work, the equation that allows us to predict the final size distribution of ZnS nanoparticles using exact concentration of zinc acetate was derived and ZnS nanoparticles with predicted mean particle diameter around 50 and 70 nm were successfully synthetised. GRAPHICAL ABSTRACT

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Structural, magnetic and optical properties of ZnO nanostructures converted from ZnS nanoparticles

Cited by 23 publications

References 29 publications

Cathodoluminescence characterization of Zno/Zns nanostructures anodized under hydrodynamic conditions

Cathodoluminescence characterization of Zno/Zns nanostructures anodized under hydrodynamic conditions

Fabrication of Ordered and High-Performance Nanostructured Photoelectrocatalysts by Electrochemical Anodization: Influence of Hydrodynamic Conditions

Synthesis of ZnS nanoparticles of required size by precipitation in aerosol microdroplets

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