Preparation And Water Purification Performance Research Of Two-dimensional Carbide Crystals Ti₃C₂ And Its Composite Materials

Ti₃C₂ is two-dimensional crystal carbide which has graphene structure, due to its special laminated structure, has been widely research. We took Ti₃C₂ as adsorbent and studied the adsorption of organic pollutants in water. Prepared Ti₃C₂ nanocomposites and studies their photocatalytic performance.Ti₃C₂ have better adsorption performance for adsorption of rhodamine B, methylene blue and methyl orange organic pollutants. Its adsorption ability of organic pollutants is significantly enhanced with the increasing of temperature. The adsorption ability of methyl orange and methylene blue is worse than rhodamine B. And Ti₃C₂ is easily oxidized to TiO₂, after different temperature oxidized, TiO₂/C nanocomposites have been prepared, and have good photocatalytic performance. Under UV illumination, after 5 min, the degradation rate can reach 90%, this is much better than commercial P25, and after 10 min, photocatalytic reaction basically completed.Ti₃C₂/TiO₂ nanocomposites have been successfully prepared by hydrothermal synthesis method and Ti₃C₂/ZnO nanocomposites have been successfully prepared by solvent thermal, we studied their photocatalytic performance under ultraviolet light, with rhodamine B and methyl orange as simulated pollutants. Studies have shown that Ti₃C₂/TiO₂ nanocomposites obviously show high photocatalytic effect than pure TiO₂, but the content of TiO₂ has little effects on the photocatalytic properties. Ti₃C₂/ZnO nanocomposites show poor photocatalytic effect than pure ZnO, it shown that there does not produce synergies between Ti₃C₂ and ZnO.In addition, a series of Ti₃C₂/TiO₂/Mx Oy ternary nanocomposites have been successfully prepared by nitrate decomposition, use rhodamine B as simulate pollutant, we studied photocatalytic performance of Ti₃C₂/TiO₂/CuO and Ti₃C₂/TiO₂/ZnO, research shows that Ti₃C₂/TiO₂/CuO has higher catalytic activity than Ti₃C₂/TiO₂/ZnO.