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Facile solvo-hydrothermal synthesis of Bi2MoO6 for the photocatalytic reduction of CO2 into ethanol in water under visible light

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Abstract

Bi2MoO6 photocatalysts were synthesized by the hydro- and solvothermal methods. Using different solvents, pH values of the precursor suspensions and temperature during synthesis were tested, by and experimental design, to investigate the effect of these variables on the catalysts’ photocatalytic activity. To evaluate and compare the physical properties of the samples, X-ray diffraction analysis, SEM, BET measurements, UV–vis spectroscopy and zeta potential were applied. The results revealed that the pH is the statistically significant variable more important for both solvents and differences in catalysts characterizations, like morphology and crystallinity, were found with the solvents change. The as-synthesized samples exhibited good performance for the photoreduction of CO2 into ethanol in liquid phase. The yields of ethanol obtained over Bi2MoO6–H2O and Bi2MoO6–EG/Et catalysts, under the optimal conditions, were 34.44 and 24.43 µmol g−1 h−1, respectively.

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Acknowledgements

The authors gratefully acknowledge the financial support of CAPES and CNPq.

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  1. Departament of Chemical Engineering, Federal University of Rio Grande do Sul, R. Ramiro Barcelos 2777, Porto Alegre, RS, 90035-007, Brazil

    Camila Silva Ribeiro & Marla Azário Lansarin

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  1. Camila Silva Ribeiro
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Correspondence to Camila Silva Ribeiro.

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Silva Ribeiro, C., Azário Lansarin, M. Facile solvo-hydrothermal synthesis of Bi2MoO6 for the photocatalytic reduction of CO2 into ethanol in water under visible light. Reac Kinet Mech Cat 127, 1059–1071 (2019). https://doi.org/10.1007/s11144-019-01591-z

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