Designing B–C3N4/Bi2WO6 to construct a Z-type hybrid heterostructure for efficient degradation of antibiotics

Abstract

Constructing nanocomposite structures with good charge transfer pathways is an effective way to obtain high-efficiency photocatalysts. Therefore, we prepared a Z-scheme heterojunction B–C3N4/Bi2WO6 composite material by combining 2D B–C3N4 nanosheets and 2D Bi2WO6 nanosheets. The composite catalyst exhibited significant multi-purpose photocatalytic activity against the antibiotics. When the Bi2WO6 proportion was 100 % (The proportion of Bi2WO6 to B–C3N4 is 1:1), the degradation efficiency of TC-HCl reached 85.7 % within 90 min, demonstrating the best photocatalytic performance. UV–vis showed that the visible light response range of the photocatalytic material shifted to the infrared region, possibly due to the construction of a Z-type heterojunction. The PL results showed that the electron-hole recombination rate of B–C3N4 is lower than that of g-C3N4 due to B-doping. Doped heterostructures can effectively enhance the performance of photocatalytic materials and offer a novel approach to pollutant degradation.