Fabrication ternary dual Z-scheme InVO 4 /Bi 2 S 3 /g-C 3 N 4 heterojunction photocatalyst for the highly efficient visible-light-driven degradation of Reactive Blue 19

A novel visible-light-driven InVO 4 /Bi 2 S 3 /g-C 3 N 4 (VBSCN) nanocomposite photocatalyst was successfully synthesized by a wet-impregnation method. The phase, morphology, chemical composition, microstructure, and optical properties of the prepared pure g-C 3 N 4 and ternary InVO 4 /Bi 2 S 3 /g-C 3 N 4 heterojunctions were measured in detail by various characterization techniques, including powder XRD, FT-IR, TEM, SEM, BET, UV–Vis DRS, PL, the photocurrent response, and EIS analyses. The fabricated nanocomposites Bi 2 S 3 /g-C 3 N 4 with the InVO 4 doping mass ratio of 5% exhibited superior photocatalytic degradation of Reactive blue 19 dye under visible light irradiation. Furthermore, O 2 − was identified as the main active species by free radical trapping. This efficient catalysis was benefited from the doping of InVO 4 , which reduced the wide intrinsic band gap and improved the absorption and utilization ability of visible light. Meanwhile, a dual Z-scheme heterostructure interface was constructed to realize the rapid separation of photogenerated electron–hole pairs. This investigation may provide referential significance for the exploration and fabrication of new and efficient g-C 3 N 4 -based heterostructure.