Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application

Aiymkul Markhabayeva; R.  Dupre; R.  Nemkayeva; N.  Nuraje

doi:10.26577/phst.2023.v10.i2.04

Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application

Authors

Aiymkul Markhabayeva Institute of Applied Science and Information Technologies https://orcid.org/0000-0002-0657-422X
R. Dupre Department of Chemical Engineering, Texas Tech University, Lubbock, Texas, United States https://orcid.org/0000-0002-6604-639X
R. Nemkayeva Department of Chemical and Materials Engineering, School of Engineering and Digital Science, Nazarbayev University, Astana, Kazakhstan https://orcid.org/0000-0002-8782-703X
N. Nuraje Renewable Energy Lab, National Laboratory Astana, Nazarbayev University, Astana, Kazakhstan https://orcid.org/0000-0002-4335-8905

DOI:

https://doi.org/10.26577/phst.2023.v10.i2.04

113 119

Abstract

In this work, hierarchical WO₃ microspheres were synthesized using chemical bath deposition. The morphology of the synthesized sample was studied using scanning electron microscopy (SEM). The hierarchical WO₃ 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 2.2 eV, which indicates high light absorption ability. A photocurrent study was done to investigate the photocatalytic activity. The photoelectrode was prepared using hierarchical WO₃ microspheres and polymer deposited on fluorine doped tin oxide (FTO) glass via spin coating technique. A remarkable photocurrent density of 18 A/cm² at 0.5 V was achieved. The elongated structures improved light absorption ability and photocatalytic activity.

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How to Cite

Markhabayeva, A., Dupre, R. ., Nemkayeva, R. ., & Nuraje, N. . (2023). Synthesis of hierarchical wo3 microspheres for photoelectrochemical water splitting application. Physical Sciences and Technology, 10(3-4), 33–39. https://doi.org/10.26577/phst.2023.v10.i2.04

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Issue

Vol. 10 No. 3-4 (2023): PHYSICAL SCIENCES AND TECHNOLOGY

Section

Nanomaterials and Nanotechnology

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