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Uniform sono-dispersed co-catalysts unlock superior CO₂ photoreduction on Bi₂MoO₆/TiO₂

Maryam Ahmadi, Seyed Mehdi Alavi, Ali Akbar Asgharinezhad, Azadeh Haghighatzadeh, Mary Larimi Orcid Logo

Catalysis Today, Volume: 466, Start page: 115674

Swansea University Author: Mary Larimi Orcid Logo

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DOI (Published version): 10.1016/j.cattod.2025.115674

Abstract

This study investigates the photocatalytic reduction of CO2 using water vapor in a top-irradiation batch reactor, with M-Bi2MoO6/TiO2 serving as the photocatalyst. Various M-Bi2MoO6/TiO2 samples with different co-catalysts (M: Ni, Ce, Co, Mo, Cu) were fabricated through a deposition-ultrasound-assis...

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Published in: Catalysis Today
ISSN: 0920-5861 1873-4308
Published: Elsevier BV 2026
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa71187
Abstract: This study investigates the photocatalytic reduction of CO2 using water vapor in a top-irradiation batch reactor, with M-Bi2MoO6/TiO2 serving as the photocatalyst. Various M-Bi2MoO6/TiO2 samples with different co-catalysts (M: Ni, Ce, Co, Mo, Cu) were fabricated through a deposition-ultrasound-assisted approach. The prepared samples underwent examination using UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray diffraction (XRD), Field-emission scanning electron microscopy (FESEM), N2 adsorption-desorption isotherms, Photoluminescence (PL) and Raman spectroscopy. Methane was identified as the predominant reaction product, and the introduction of co-catalysts through sono-deposition significantly improved the photocatalytic efficiency. The catalysts with various co-catalysts showed different performances in CO2 reduction. Additionally, the optical properties of the composite samples changed with the deposition of different co-catalysts on the BT support. Compared to pristine TiO2, the co-catalyst-loaded composites exhibited superior CO2 reduction performance. Among them, the Ni-BT sample had the highest methane yield, attributed to the even distribution of Ni nanoparticles, better visible-light absorption, and more effective charge separation and transfer.
Keywords: Bismuth molybdate; Co-catalyst; TiO2; Photocatalyst; CO2reduction; Sono-Dispersion
College: Faculty of Science and Engineering
Funders: Swansea University
Start Page: 115674

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