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Enhanced UV-Vis-NIR activated photocatalytic activity from Fe3+-doped BiOBr:Yb3+/Er3+ upconversion nanoplates: synergistic effect and mechanism insight

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Abstract

Upconversion (UC) materials are recognized as promising candidates to harvest solar energy for photocatalysis. In this work, a simple strategy for simultaneously enhancing the UC luminescence and photocatalytic efficiency of BiOBr:Yb3+/Er3+ nanoplates through Fe3+ ion doping is reported. Compared to the Fe3+-free sample, the UC emission intensity was significantly enhanced through tailoring of the crystal symmetry by Fe3+ ions. Experiment and DFT calculations reveal that the introduction of Fe3+ ions resulted in the formation of an impurity energy level, extending to the light absorption region. As expected, the Fe3+-doped BiOBr:Yb3+/Er3+ nanoplates exhibit a wide photoresponse from the UV to NIR regions, good stability, and obviously enhanced photocatalytic activities compared with the BiOBr:Yb3+/Er3+ nanoplates in the degradation of RhB. The boosted photocatalytic activity can be attributed to the synergic effect of the efficient utilization of UC luminescence and Fe3+ doping, where Fe3+ doping could improve the light harvesting capacity, enhance the separation efficiency of electron and hole (eāˆ’/h+) pairs, and promote the production of highly oxidative species. This work not only provides a promising system for the efficient utilization of solar light, but also offers a feasible guideline for the further design of broad-spectrum active photocatalysts.

Graphical abstract: Enhanced UV-Vis-NIR activated photocatalytic activity from Fe3+-doped BiOBr:Yb3+/Er3+ upconversion nanoplates: synergistic effect and mechanism insight

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Publication details

The article was received on 11 Oct 2018, accepted on 14 Nov 2018 and first published on 14 Nov 2018


Article type: Research Article
DOI: 10.1039/C8QI01098F
Citation: Inorg. Chem. Front., 2019, Advance Article
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    Enhanced UV-Vis-NIR activated photocatalytic activity from Fe3+-doped BiOBr:Yb3+/Er3+ upconversion nanoplates: synergistic effect and mechanism insight

    Y. Li, L. Yao, D. Xu, Y. Hu, S. Yang and Y. Zhang, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C8QI01098F

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