Preparation of ZnO/BD-C3N4 nanocomposite and investigation of photocatalytic efficiencyin methylene blue decrease

In recent years, with the development of the industry and the increase in production, the dyestuffs in the waste water of the factories have negative effects on the environment and create environmental pollution. The dyes used in the production of the textile industry and dye factories are toxic and refractory substances that are resistant to biological treatment. In addition, it causes permanent diseases by impairing the health of grown plants, animals and people. The most harmful of these dyes is methylene blue (MB), which has strong chemical bonds. Methylene blue is a very dangerous, poisonous heterocyclic compound that damages the respiratory tract, causes symptoms such as vomiting, hyperhidrosis and mental disorders in people. Therefore, the removal of methylene blue from wastewater is of great importance. In this study, low-cost and non-toxic BD-C3N4 nanocomposite was prepared by pyrolysis thermal polycondensation, and ZnO@BD-g-C3N4 was prepared by the method described by Pan of pure ZnO nanoparticles with different weights of ZnO@BD-g-C3N4 (2% and 10%). The nanocatalyst produced in this study was characterized by FT-IR, XPS, XRD, SEM, EDX, BET, Uv-Vis, TEM and EDX devices. The photocatalytic effect of ZnO/BD-C3N4 was investigated in the degradation of methylene blue under visible light. As a result of the photocatalytic experiments, it was revealed that the ZnO/BD-C3N4 photocatalyst with 2 wt% ZnO content showed a much better photocatalytic effect than ZnO@BD-g-C3N4. However, in the reusability tests, the ZnO@BD-g-C3N4 photocatalyst containing 2% by weight of ZnO showed % 88,6 photocatalytic efficiency even in its sixth use. Considering the results obtained, it is seen that ZnO@BD-g-C3N4 nanocatalyst is effective in the degradation of methylene blue from wastewater, and it is possible to develop different photocatalysts active in visible light with high chemical stability. Thisstudywassupportedby DUBAP projectnumbered FBE.22.008. Keywords : Photocatalyst, Nanoparticle, ZnO , ZnO@BD-g-C3N4, Methylene Blue