Bi/OV-Bi2O2CO3 heterojunction with enhanced round-the-clock degradation activity

Abstract

Bi/OV-Bi2O2CO3 heterojunction was prepared via chemical reduction. The surface of the OV-Bi2O2CO3 microspheres was reduced to Bi by NaBH4, and the electrons were stored in OV-Bi2O2CO3. After dark reaction for 30 min, the total organic carbon removal rate of Bi/OV-Bi2O2CO3 towards tetracycline reached 22%. The localized surface plasmon resonance(LSPR) effect of Bi and oxygen vacancy enhanced the photocatalytic activity of Bi/OV-Bi2O2CO3. The removal rates of tetracycline under visible and near infrared light were 78% and 75%, respectively, and the degradation rates were 2.9 and 3.5 times that of Bi2O2CO3. This work makes a beneficial exploration for preparing round-the-clock catalysts.

Keywords

• Bi
• Oxygen vacancy
• Round-the-clock
• Heterojunction
• LSPR