Direct Z‐scheme N‐doped TiO2/MoS2 Heterojunction Photocatalyst for Photodegradation of Methylene Blue under Simulated Sunlight

Abstract The N‐doped TiO 2 /MoS 2 heterojunction with direct Z‐scheme was prepared by growing MoS 2 flowers on the surface of N‐doped TiO 2 (N‐TiO 2 ) spheres. The results show that the N‐TiO 2 sphere is composed of nanoparticles with the diameter of about 10 nm. The MoS 2 flowers with the diameter of 500 nm could grow homogeneously on the surface of N‐TiO 2 spheres, and the latter could prevent the accumulation of MoS 2 nanopetals. The N‐TiO 2 /MoS 2 heterojunction has a narrow band gap of 2.05 eV and high activity for degrading methylene blue (MB). The degradation rate of MB by N‐TiO 2 /MoS 2 can reach 97.9 % under simulated sunlight, which is much higher than those of TiO 2 , MoS 2 and N‐TiO 2 . Moreover, the N‐TiO 2 /MoS 2 heterojunction shows a good stability and the degradation rate of MB keeps up to 85.9 % after being subjected to five cycles.