DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite

Sodiq Olalekan Ogunbayo; Olayinka Oderinde; Adetola Abiola Ajayi; Adeola Roseline Olawuyi; Emmanuel Ohifueme Alegbe; Olubunmi Ayoni Ogundiran; Kafilat Olayemi Suleiman; Damilola Matthew Afolabi; Walimatu Abdulhakeem Ahmed

doi:10.5455/NJEAS.299062

, Vol:

Current Volume Archive Aims and Scope Abstracting & Indexing

Required files to be uploaded

NJEAS TEMPLATE FOR AUTHORS_(v2r)_

Original Research

NJEAS. 2026; 3(2):

doi: 10.5455/NJEAS.299062

DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite

Sodiq Olalekan Ogunbayo, Olayinka Oderinde, Adetola Abiola Ajayi, Adeola Roseline Olawuyi, Emmanuel Ohifueme Alegbe, Olubunmi Ayoni Ogundiran, Kafilat Olayemi Suleiman, Damilola Matthew Afolabi, Walimatu Abdulhakeem Ahmed.

Abstract
Metal oxide nanocomposites continue to attract attention for their tunable optical, catalytic, and antimicrobial properties. This study presents the green synthesis of tungsten oxide–cerium oxide (WO3-CeO2) nanocomposites using ethaline-based deep eutectic solvents (DES) and DES-water mixtures, revealing how solvent structure directly governs material performance. FTIR confirmed the formation of WO3 and CeO2 through characteristic metal oxide bands, while XRD showed well-defined monoclinic W18O49, hexagonal Ce2O3 and Ce2WO6 phases. The SEM analysis revealed highly aggregated microspherical clusters with a broad particle size distribution. Also, the composites exhibited pronounced photochromic response, with the DES-water composite samples rapidly changing to light-blue colour within 10 s under UV irradiation, driven by hydrogen-assisted electron trapping and W5+/W6+ redox cycling, as the UV-Vis absorption showed broad charge-transfer bands consistent with visible-light activation. Moreover, under light-assisted catalysis, the composites efficiently degraded bromophenol blue, achieving significant decolorization within 60 min, while the electrochemical impedance spectroscopy confirmed enhanced charge mobility in DES-water samples, with a markedly lower Rct (≈229 Ω) compared to pure DES analogues. Furthermore, the antimicrobial assays demonstrated strong, concentration-dependent inhibition of S. aureus and E. coli, with DES-water composites showing the highest activity. In conclusion, there results established DES-templated tungsten oxide–cerium oxide composite as a versatile, high-performance functional materials for environmental, optical, and antimicrobial applications.

Key words: Deep eutectic solvent, Ethaline, Tungsten oxide, Cerium oxide, antimicrobial activity, Photochromic, Photocatalytic

	ARTICLE TOOLS
	Abstract
	PDF Fulltext
	How to cite this article
	Citation Tools
	Related Records
	Articles by Sodiq Olalekan Ogunbayo Articles by Olayinka Oderinde Articles by Adetola Abiola Ajayi Articles by Adeola Roseline Olawuyi Articles by Emmanuel Ohifueme Alegbe Articles by Olubunmi Ayoni Ogundiran Articles by Kafilat Olayemi Suleiman Articles by Damilola Matthew Afolabi Articles by Walimatu Abdulhakeem Ahmed
	on Google
	on Google Scholar

How to Cite this Article

Pubmed Style

Ogunbayo SO, Oderinde O, Ajayi AA, Olawuyi AR, Alegbe EO, Ogundiran OA, Suleiman KO, Afolabi DM, Ahmed WA. DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite. NJEAS. 2026; 3(2): -. doi:10.5455/NJEAS.299062

Web Style

Ogunbayo SO, Oderinde O, Ajayi AA, Olawuyi AR, Alegbe EO, Ogundiran OA, Suleiman KO, Afolabi DM, Ahmed WA. DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite. https:///?mno=299062 [Access: August 25, 2026]. doi:10.5455/NJEAS.299062

AMA (American Medical Association) Style

Ogunbayo SO, Oderinde O, Ajayi AA, Olawuyi AR, Alegbe EO, Ogundiran OA, Suleiman KO, Afolabi DM, Ahmed WA. DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite. NJEAS. 2026; 3(2): -. doi:10.5455/NJEAS.299062

Vancouver/ICMJE Style

Harvard Style

Ogunbayo, S. O., Oderinde, . O., Ajayi, . A. A., Olawuyi, . A. R., Alegbe, . E. O., Ogundiran, . O. A., Suleiman, . K. O., Afolabi, . D. M. & Ahmed, . W. A. (2026) DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite. NJEAS, 3 (2), -. doi:10.5455/NJEAS.299062

Turabian Style

Ogunbayo, Sodiq Olalekan, Olayinka Oderinde, Adetola Abiola Ajayi, Adeola Roseline Olawuyi, Emmanuel Ohifueme Alegbe, Olubunmi Ayoni Ogundiran, Kafilat Olayemi Suleiman, Damilola Matthew Afolabi, and Walimatu Abdulhakeem Ahmed. 2026. DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite. Nile Journal of Engineering and Applied Science, 3 (2), -. doi:10.5455/NJEAS.299062

Chicago Style

Ogunbayo, Sodiq Olalekan, Olayinka Oderinde, Adetola Abiola Ajayi, Adeola Roseline Olawuyi, Emmanuel Ohifueme Alegbe, Olubunmi Ayoni Ogundiran, Kafilat Olayemi Suleiman, Damilola Matthew Afolabi, and Walimatu Abdulhakeem Ahmed. "DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite." Nile Journal of Engineering and Applied Science 3 (2026), -. doi:10.5455/NJEAS.299062

MLA (The Modern Language Association) Style

Ogunbayo, Sodiq Olalekan, Olayinka Oderinde, Adetola Abiola Ajayi, Adeola Roseline Olawuyi, Emmanuel Ohifueme Alegbe, Olubunmi Ayoni Ogundiran, Kafilat Olayemi Suleiman, Damilola Matthew Afolabi, and Walimatu Abdulhakeem Ahmed. "DES-solvothemal synthesis, characterisation, opto-catalytic and antimicrobial properties of tungsten oxide-cerium oxide composite." Nile Journal of Engineering and Applied Science 3.2 (2026), -. Print. doi:10.5455/NJEAS.299062

APA (American Psychological Association) Style

Author Login Reviewer Login About Publisher

About Nile Journal of Engineering and Applied Science

Contact Information

How to cite this article


About Nile Journal of Engineering and Applied Science The Nile Journal of Engineering and Applied Sciences publishes original peer-reviewed articles on fundamental and applied research and reviews ... Read more. For best results, please use Internet Explorer or Google Chrome.	Contact Information 1. Prof. Abdulhameed Danjuma Mambo Editor-in-Chief abdulhameed.mambo@nileuniversity.edu.ng 2. Dr. Adekunle Adeleke Associate Editor-in-Chief adekunle.adeleke@nileuniversity.edu.ng 3. Dr. Ifeyinwa Obianyo Managing Editor ifeyinwa.obianyo@nileuniversity.edu.ng