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Uniform porous Bi5O7I (BOI) microspheres photocatalysts co-doped with Fe3+ and Er3+ were synthesized by a solvothermal-thermal decomposition method, in which Er3+ with upconversion properties could transform infrared light beyond the absorption edge of Bi5O7I into visible light, and also activate the Fe3+-doped Bi5O7I (Fe-BOI). The photocatalytic activities of the photocatalysts were evaluated by...
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