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Enhanced Photocatalytic Activity over La(OH)3/CaTiO3 Heterostructure on the Degradation of Methylene Blue

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Abstract

La(OH)3/CaTiO3 composite photocatalyst with a heterjunction structure was synthesized by a facile method of solvothermal procedure. La(OH)3 was dispersed on the surface of CaTiO3 with butterfly-like dendrites. The photocatalytic activity of La(OH)3/CaTiO3 heterostructure was enhanced for methylene blue (MB) degradation under ultraviolet (UV) irradiation. Especially 7La(OH)3/CaTiO3 obtained a highest MB degradation of 95.9%, which is 1.33 times higher than that of pure CaTiO3. The trapping experiment suggested that OH active radical plays the major role. The enhanced photocatalytic activity over 7La(OH)3/CaTiO3 heterostructure on the degradation of MB is attributed to the butterfly-like dendrites CaTiO3 and the effectively separation of charged carriers.

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ACKNOWLEDGMENTS

This work was financially supported by the National Natural Science Foundation of China (grants nos. 52062047, 51762042 and 21763030), the Shaanxi Province Science and Technology Program (grants 2019JLM-44, 2019SF-273, and 2018GY-086), the Scientific Research and Sharing Platform Construction Project of Shaanxi Province (grant 2019PT-18), the Education Department of Shaanxi Provincial Government (grant 21JS043) and the Innovation Capacity Support Plan of Shaanxi Province (grant 2020TD-032).

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Gao, WW., Su, T., Gong, Y. et al. Enhanced Photocatalytic Activity over La(OH)3/CaTiO3 Heterostructure on the Degradation of Methylene Blue. Russ J Appl Chem 94, 1641–1650 (2021). https://doi.org/10.1134/S1070427221120107

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