Photocatalytic activity of liquid-phase exfoliated gallium selenide flakes

Prikhodko, O. Yu.; Aitzhanov, M. B.; Gusseinov, Nazim; Kalkozova, Zh. K.; Dikhanbaev, K. K.; Markhabayeva, A. А.; Myrzabekova, M. M.; Nemkayeva, Renata R.; Mukhametkarimov, Ye. S.

doi:10.15251/cl.2021.1812.777

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…However, zinc oxide is susceptible to photocorrosion in aqueous and acidic electrolytes and dissolves to form Zn(OH) 2 [ 13 ]. Despite this limitation, experimental results have shown that ZnO actually exhibits higher photocatalytic activity than TiO 2 and other semiconductor catalysts, such as CdS, WO 3 , Fe 2 O 3 , SnO 2 , ZrO 2 , and GaSe [ 14 ], especially in the degradation of dyes in aqueous solution [ 15 , 16 , 17 , 18 , 19 ]. These advantages make it a good candidate for a photoelectrode in photoelectrochemical cells for water oxidation.…”

Section: Introductionmentioning

confidence: 99%

Construction of a ZnO Heterogeneous Structure Using Co3O4 as a Co-Catalyst to Enhance Photoelectrochemical Performance

Markhabayeva,

Kalkozova,

Nemkayeva

et al. 2023

Materials

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Recently, heterostructured photocatalysts have gained significant attention in the field of photocatalysis due to their superior properties compared to single photocatalysts. One of the key advantages of heterostructured photocatalysts is their ability to enhance charge separation and broaden the absorption spectrum, thereby improving photocatalytic efficiency. Zinc oxide is a widely used n-type semiconductor with a proper photoelectrochemical activity. In this study, zinc oxide nanorod arrays were synthesized, and then the surfaces of ZnO nanorods were modified with the p-type semiconductor Co3O4 to create a p–n junction heterostructure. A significant increase in the photocurrent for the ZnO/Co3O4 composite, of 4.3 times, was found compared to pure ZnO. The dependence of the photocurrent on the morphology of the ZnO/Co3O4 composite allows for optimization of the morphology of the ZnO nanorod array to achieve improved photoelectrochemical performance. The results showed that the ZnO/Co3O4 heterostructure exhibited a photocurrent density of 3.46 mA/cm2, while bare ZnO demonstrated a photocurrent density of 0.8 mA/cm2 at 1.23 V. The results of this study provide a better understanding of the mechanism of charge separation and transfer in the heterostructural ZnO/Co3O4 photocatalytic system. Furthermore, the results will be useful for the design and optimization of photocatalytic systems for water splitting and other applications.

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Section: Introductionmentioning

confidence: 99%

Construction of a ZnO Heterogeneous Structure Using Co3O4 as a Co-Catalyst to Enhance Photoelectrochemical Performance

Markhabayeva,

Kalkozova,

Nemkayeva

et al. 2023

Materials

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“…Therefore, the positions of the valence band (VB) and conduction band (CB) in a semiconductor material are main issue in terms of their energy levels relative to a reference electrode [1][2][3][4]. Tungsten oxide (WO 3 ) and its nanocomposites are actively used as photoactive nanomaterials in applications involving photoelectrochemical cells (PECs) [5][6][7]. This is due to their outstanding characteristics including photostability, a high electron mobility of approximately ~12 cm 2 V −1 s −1 , and extensive hole-diffusion length of about ~150 nm, the ability to absorb around of ~12% visible light, and cost-effectiveness [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application

Markhabayeva

2023

phst

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In this work, hierarchical WO 3 microspheres were synthesized using chemical bath deposition. The morphology of the synthesized sample was studied using scanning electron microscopy (SEM). The hierarchical WO 3 microspheres formed from spontaneously self-assembled nanosheets have a high specific surface area. Structural characterizations of sample were performed using X-ray diffraction (XRD) and Raman spectroscopy. Analysis of XRD spectra showed that synthesized particles have a monoclinic modification. The optical properties of the sample were studied using UV-Vis diffuse reflectance absorption spectra. The value of the energy gap calculated from the absorption spectra is 2.25 eV, which indicates high light absorption ability. A photocurrent study was done to investigate the photocatalytic activity. The photoelectrode was prepared using hierarchical WO 3 microspheres and polymer deposited on fluorine doped tin oxide (FTO) glass via spin coating technique. A remarkable photocurrent density of 18 A/cm 2 at 0.5 V was achieved. The elongated structures improved light absorption ability and photocatalytic activity, and might be perspective as photoanode in photoelectrochemical cells.

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Light emission, structure-phase evolution, and photocatalytic behavior in full-series multilayered GaTe1−xSx (0 ≤ x ≤ 1) with direct-transition edge

Muhimmah,

Peng,

2024

Materials Today Advances

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Photocatalytic activity of liquid-phase exfoliated gallium selenide flakes

Cited by 4 publications

References 16 publications

Construction of a ZnO Heterogeneous Structure Using Co3O4 as a Co-Catalyst to Enhance Photoelectrochemical Performance

Construction of a ZnO Heterogeneous Structure Using Co3O4 as a Co-Catalyst to Enhance Photoelectrochemical Performance

Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application

Light emission, structure-phase evolution, and photocatalytic behavior in full-series multilayered GaTe1−xSx (0 ≤ x ≤ 1) with direct-transition edge

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