Rational construction of NH2-UiO-66/Bi2MoO6 nanocomposite with accelerating charge transfer for enhanced visible-light photocatalytic activity

Abstract

Abstract Developing high activity photocatalyst with rapid charge separation and transfer is still challenging. Hence, a type-II heterojunction is constructed at NH2-UiO-66/Bi2MoO6 nanocomposite employing a facile ionothermal synthesis. The interaction between NH2-UiO-66 and Bi2MoO6 will help induce the spatial isolation of photogenerated carriers. Additionally, the increasing specific surface area benefits for the enrichment of organic contaminants. Consequently, the nanocomposite display preferable catalytic performance towards the removal of rhodamine B and tetracycline under visible light irradiation. And the optimal loading capacity of NH2-UiO-66 is about 5 wt%. Superoxide free radical and holes are involved into the degradation of contaminants on account of free radical trapping test and electron spin resonance analysis. Besides, a feasible photocatalytic mechanism is presented. The research may shed light on the development of MOFs/bismuth catalyst with obvious enhancement of photocatalytic activity in the field of environmental remediation.