Fabrication of bentonite/ZIF-8 composites for photocatalytic removal of congo red in water

Abstract

The BNT/ZIF-8 composite had been successfully synthesized in polar acetic acid solvent at room temperature with 10 and 25 % mass percentages of bentonite (BNT). BNT(10)/ZIF-8 shows increased BET surface area compared to ZIF-8, which could enhance the interaction with adsorbate. The higher adsorption capacity could improve the degradation efficiency of the composite. This is demonstrated by BNT(10)/ZIF-8 with the highest degradation efficiency of 95.52 % after 100 minutes of irradiation. Furthermore, BNT(10)/ZIF-8 still showed a high stability performance of up to 86.64 % efficiency after four consecutive cycles. This study provides an alternative reference for photocatalysts for degrading dye waste in water.

Keywords

• BNT/ZIF-8 composite
• Adsorption
• Photocatalytic
• Congo red