Abstract
In this paper, a series of ErFe1−xMnxO3 (x = 0, 0.1, 0.3, 0.5) were readily prepared by the sol–gel method, with citric acid as the combustion agent. The powder gradually changes from the orthorhombic phase (ErFeO3, space group Pbnm) to the hexagonal phase (ErFe0.5Mn0.5O3, space group P63cm). Reduction in the optical band gap from 2.10 eV of ErFeO3 to 1.69 eV of ErFe0.5Mn0.5O3 is observed. Photocatalytic study on methylene blue (MB) by visible light irradiation showed that the photocatalytic activities are greatly enhanced for Mn-substituted ErFeO3, due to the narrower band gap and smaller particle size. Interestingly, ErFe0.5Mn0.5O3 also behaves complete degradation of MB within 120 min vibration, indicating the existence of piezo-electrochemical coupling. The possible photocatalytic and vibration catalytic mechanism of this system was also proposed. The results indicates that this system will be a good candidate for the decomposition of organic pollutant through utilizing both the natural vibration and solar energy.
Highlights
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A series of ErFe1−xMnxO3 (x = 0, 0.1, 0.3, 0.5) were readily prepared by the sol–gel method.
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The crystal lattice is effectively tuned from orthorhombic structure of ErFeO3 to the hexagonal structure of ErFe0.5Mn0.5O3.
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Compared with ErFeO3, increased visible light absorption is observed for Mn substituted ErFeO3 particles.
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The photocatalytic degradation efficiency of methylene blue (MB) for ErFeO3 is greatly enhanced by the introduction of Mn.
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Strong vibration catalysis of MB was also observed for ErFe0.5Mn0.5O3.
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Acknowledgements
We would like to acknowledge the financial support provided by the National Natural Science Foundation of China (No. 51572275, 51872309, U1832106), the Science and Technology Commission of Shanghai Municipality (No. 19520710900) and Shanghai Engineering Research Center of Building Waterproof Materials (No. 18DZ2253200).
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Shen, H., Feng, P., Jiang, G. et al. Synthesis of Mn-doped ErFeO3 with enhanced photo and vibration catalytic activities. J Sol-Gel Sci Technol 95, 230–238 (2020). https://doi.org/10.1007/s10971-020-05283-2
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DOI: https://doi.org/10.1007/s10971-020-05283-2