Influence of doped silver nanoparticles on the photocatalytic performance of ZnMn 2 O 4 in the production of methanol fr
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ORIGINAL ARTICLE
Influence of doped silver nanoparticles on the photocatalytic performance of ZnMn2O4 in the production of methanol from CO2 photocatalytic reduction A. S. Basaleh1 · R. M. Mohamed1 Received: 3 May 2020 / Accepted: 26 May 2020 © King Abdulaziz City for Science and Technology 2020
Abstract The creation of sustainable energy via the photocatalytic reduction of C O2 has been emerged as an eco-friendly track to create sustainable energy. In this work, we have prepared ZnMn2O4 nanoparticles that more reactive to the irradiation using visible light via silver doping. The ZnMn2O4 and Ag/ZnMn2O4 samples were tested for the production of methanol from the reduction of carbon dioxide. The surface texture and visible light absorption of ZnMn2O4 photocatalysts were improved via silver doping of the ZnMn2O4 sample. The band gap of ZnMn2O4 samples was reduced from 2.12 to 1.71 eV via silver doping of the Z nMn2O4 sample with 4.0 wt% of silver. The 3.0 Ag/ZnMn2O4 sample has 1100 μmol/g production of methanol within 9 h and 2.5 g/L dose of the photocatalyst. The high performance of Ag/ZnMn2O4 photocatalyst is due to the presence of silver, which retard e–h recombination rate and reduced band gap energy of ZnMn2O4 sample. Keywords Ag doping · ZnMn2O4 · Photocatalysts · Production of methanol · Visible light
Introduction Major concern has been comprehended towards the utilization of solar energy in the rendering of hydrocarbons from the modification of C O2 Li et al. (2018, 2019). The creation of sustainable energy via the photocatalytic reduction of CO2 has been emerged as an eco-friendly track to create sustainable energy. In other words, this way could be considered an adequate path such that it could compromise with environmental pollution (Chen et al. 2015; Park et al. 2015; Corma and Garcia 2013; Yang et al. 2019; Jin et al. 2015). The development of hydrocarbons from the photocatalytic reduction of carbon dioxide has been investigated (Inoue et al. 1979). Global warming has been labeled via establishing numerous photocatalysts to perform CO2-hydrocarbon transformation by the aid of solar energy. The non-poisoning, great photo-stability, and facile synthesis features make metal oxide semiconductors to be the adequate materials for the investigations regarding * A. S. Basaleh [email protected] 1
Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia
photocatalytic CO2-hydrocarbon transformation (Zhu et al. 2019; Li et al. 2016; Tran et al. 2012; Sohn et al. 2017; Akple et al. 2015). Nevertheless, the efficiency of these semiconductors is restricted only via their application under the action of UV light irradiation owing to their small quantum yield in addition to their large bandgap energies. Many attempts have been performed to establish highly efficient photocatalysts, especially beneath Vis light illumination (Navalón et al. 2013; Tahir 2019; Truc et al. 2018; Bai et al. 2019). In this respect, the excellen
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