Optical Properties of GaTe-ZnTe Nanolamellae Composite

Spalatu, Nicolae; Evtodiev, Igor; Caraman, Iuliana; Evtodiev, Silvia; Rotaru, I.; Caraman, Mihail; Untilă, Dumitru

doi:10.1016/j.egypro.2015.12.311

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…Figure a shows the prepared catalyst showed a highabsorbance in the UV region, presenting possible higher photo‐degradation performance. It can be seen that the absorption intensity and absorption edge of NiS–In 2 O 3 /GO nanocomposites were higher than those of the In 2 O 3 and NiS–In 2 O 3 catalysts . The extrapolation of the Kubelka–Munk plot determined the optical band gaps of the prepared catalyst.…”

Section: Resultsmentioning

confidence: 98%

Graphene oxides as support for the synthesis of nickel sulfide–indium oxide nanocomposites for photocatalytic, antibacterial and antioxidant performances

Ashraf

Zhang

et al. 2019

Applied Organom Chemis

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NiS (nickel sulfide)–In2O3 (indium oxide) nanostructures and NiS–In2O3 decorated on graphene oxide (GO) were demonstrated by ultrasonic/hydrothermal method. The structural study demonstrates the preparation of bixbyite and hexagonal phase of In2O3 and NiS for all of the synthesized catalysts. The band gap of the synthesized catalyst was determined to be in the range of 2.30–3.00 eV. A morphological evaluation by field emission scanning electron microscopy of NiS–In2O3 decorated on graphene oxide shows support for the NiS–In2O3 on the graphene oxide layer. Different test parameters were performed to study the phase and morphology. The particle sizes of the In2O3, NiS–In2O3 and NiS–In2O3/GO nanocomposites were 56.0, 62.0 and 66.0 nm, respectively. The photocatalytic performance of NiS–In2O3/GO nanocomposites was examined for the degradation of methylene blue dye under a UV lamp. The prepared sample shows 98.25% photocatalytic degradation within 40 min and at pH 9. With the presence the NiS and GO, the photo‐degradation capacities of In2O3 and NiS–In2O3 are improved owing to the low band gap being calculated in UV–vis DRS analysis. The high ratio of NiS causes the highest photocatalytic properties of NiS–In2O3 nanocomposites owing to the enhancement of charge separation efficiency and generation of hydroxyl radicals. This study presents a facile and low‐cost method to prepare highly active NiS–In2O3/GO nanocomposites. The antibacterial data indicate the significant properties of NiS–In2O3/GO nanocomposites for this study.

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Section: Resultsmentioning

confidence: 98%

Graphene oxides as support for the synthesis of nickel sulfide–indium oxide nanocomposites for photocatalytic, antibacterial and antioxidant performances

Ashraf

Zhang

et al. 2019

Applied Organom Chemis

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“…The thermal annealing (TA) of gallium and indium monochalcogenides in normal atmosphere, or in oxygen‐enriched atmosphere, leads to the formation of their crystalline micro and nanocomposites with In 2 O 3 and Ga 2 O 3 oxides . As we demonstrated in our previous works, crystalline composites consisting of A II B VI and A III B VI semiconductors, with physical properties characteristic for these compounds, can be obtained by TA of the A III B VI (GaS, GaSe, GaTe and InSe) and

{normalA}_{2}^{III} {normalB}_{3}^{VI}

semiconductors (e.g., Ga 2 S 3 ) in Cd and Zn vapours …”

Section: Introductionmentioning

confidence: 87%

Optical and Photoelectric Properties of Nanolamellar Structures Obtained by Thermal Annealing of InSe Plates in Zn Vapours

Untilă

Evtodiev

Caraman

et al. 2018

Physica Status Solidi (a)

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The structural, optical and photoelectric properties of InSe crystals grown by Bridgman-Stockbarger method and ZnSe/InSe structures obtained on InSe by thermal annealing in Zn vapours are studied in this paper. The study of structural properties confirms that ZnSe compound is formed. The analysis of photoelectric properties reveal that both the ZnSe-InSe composite layer and the composite/InSe heterojunction are photosensitive in the VIS-NIR spectral region.

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“…Its single crystals are composed of layered atomic packings of Te–Ga–Ga–Te type with strong bonds of ionic‐covalent type inside packings and weak van der Waals polarization bonds between them . Packings are so disposed to one another that cracks are formed between them, in which atoms and molecules can easily intercalate . The van der Waals planes are free of dangling bonds and prove to be very inert to chemical reactions .…”

Section: Introductionmentioning

confidence: 99%

Photoelectric and photoluminescence properties of CdTe–GaTe composite

Caraman

Spalatu

Evtodiev

et al. 2016

Physica Status Solidi (b)

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A GaTe-CdTe composite was obtained by thermal treatment at 1020 K of GaTe single crystals in Cd vapor atmosphere. The composite photoluminescence, photoconductivity, and composition are studied in this work. The photosensitivity and photoluminescence band structure are determined for both the primary crystals and the composite. The CdTe crystallites create, in the GaTe bandgap, recombination and trapping levels, which determine the structure of the photoluminescence spectra and the spectral range of composite photosensitivity. The photoluminescence spectrum of the composite at 80 K contains characteristic bands of both composite components, GaTe and CdTe. From the analysis of thermally stimulated luminescence curves, the energies of the electron trapping levels in the composite are determined.

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Optical Properties of GaTe-ZnTe Nanolamellae Composite

Cited by 6 publications

References 25 publications

Graphene oxides as support for the synthesis of nickel sulfide–indium oxide nanocomposites for photocatalytic, antibacterial and antioxidant performances

Graphene oxides as support for the synthesis of nickel sulfide–indium oxide nanocomposites for photocatalytic, antibacterial and antioxidant performances

Optical and Photoelectric Properties of Nanolamellar Structures Obtained by Thermal Annealing of InSe Plates in Zn Vapours

Photoelectric and photoluminescence properties of CdTe–GaTe composite

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