A facile environmentally benign strategy was developed to prepare Bi3+ self-doped NaBiO3·2H2O by acidic hydrolysis of NaBiO3·2H2O in citric acid aqueous solution. The investigation of methyl orange degradation performance revealed that Bi3+ self-doped NaBiO3·2H2O exhibited remarkably enhanced visible light photocatalytic activity than pristine NaBiO3·2H2O, and the optimal Bi3+ self-doped NaBiO3·2H2O (CBO-0.25) achieved the maxima (92.5%) degradation efficiency within 30 min. Due to the formation of new energy level derived from Bi3+ in the forbidden gap, Bi3+ self-doped NaBiO3·2H2O samples presented extended visible light response range and improved photogenerated charges separation efficiency than pristine NaBiO3·2H2O, which is responsible for the enhancement of photocatalytic performance. Radical capture experimental results confirmed that hole was the dominant reactive species. Our synthesis method for Bi3+ self-doped NaBiO3·2H2O may pave a new way for designing self-doped materials.
Journal of Materials Science: Materials in Electronics – Springer Journals
Published: Dec 20, 2017
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