Construction of N-doped 2D TiO2/MoS2 S-scheme heterojunction for enhanced photodegradation activity by rhodamine B

Large-size 2D TiO2 was prepared by hydrothermal method, then N doping was carried out ultrasound-assisted methods were utilized to successfully prepare N-TiO2/MoS2 composites for simulating the degradation of rhodamine B (RhB) under sunlight. The degradation rate of RhB by N-TiO2/MoS2 was as high as 92%, which was 40% higher than the 2D N-TiO2 and 59% higher than that of TiO2. N doping TiO2 can effectively improve the response to visible light and regulate its conduction band, with MoS2 to construct a new type of S-scheme heterojunction photocatalysts, which promotes the separation and transfer of carriers, and at the meantime, crushed MoS2 exposes more active sites. So the performance of photocatalytic degradation was improved. This work constructs the efficient semiconductor photocatalytic nano-heterostructures which is important for the surface modification of defective TiO2 to improve the degradation of photocatalysts. It also introduces a novel approach to the straightforward synthesis with fresh powerful photocatalysts.