Construction of MIL-125-NH2@BiVO4 Composites for Efficient Photocatalytic Dye Degradation

The design and construction of a photocatalyst with a heterostructure are a feasible and effective way to enhance the catalytic performance. Herein, a specially designed composite based on MIL-125-NH2 and BiVO4 was prepared and used for wastewater treatment. In the hybrid MIL-125-NH2@BiVO4, MIL-125-NH2 was uniformly dispersed on the BiVO 4 surface. There is a high affinity between MIL-125-NH2 and BiVO4 due to the lattice defects. Under visible light irradiation, the catalytic activity of the as-prepared composite was evaluated by the degradation of various dyes such as malachite green, crystal violet, methylene blue, and Congo red. Nearly 983, 99.1, and 41.0% of the initial MG, MB and Cr(VI) were respectively removed over the optical sample of BVTN-5, demonstrating that the hybrid holds great promise for practical applications. Moreover, the composites can be recyded and reused with good stability after five consecutive cycles. The mechanism was proposed and discussed in detail. This work will shed light on the construction of MOF-based composites for efficient photocatalysis.

Automated summary

The design and construction of a heterostructure photocatalyst is an effective way to enhance catalytic performance. In this study, a composite based on MIL-125-NH2 and BiVO4 was prepared for wastewater treatment. The hybrid exhibited excellent catalytic activity and stability, showing promising potential for practical applications. This work provides important insights into the construction of MOF-based composites for efficient photocatalysis.