Abstract
Bi2O3 and Bi2O3 doped with La and Rh were synthesized by a parallel flaw precipitation method and characterized by Brunauer-Emmett-Teller method (BET), X-ray diffraction, UV-vis diffuse reflectance, X-ray photoelectron spectroscopic techniques, and surface photovoltage. The results indicate that doping La and Rh into Bi2O3 increases the BET surface area, induces the Bi4f7/2 shift, and promotes the photo-induced charge separation rate. The photocatalytic performance for decolorization of rhodamine B aqueous solution under sunlight was evaluated, the results show that La-doped Bi2O3 with 2 mol% possesses the best photocatalytic activity and the possible reason was suggested.
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