Preparation And Application Of TiO₂/polyacrylonitrile Nanocomposite Fibers

With the continuous development of urbanization and industrialization, the increasingly serious environmental pollution,use of semiconductor TiO₂ control water pollution and air pollution has become a common concern.TiO₂ due to its shortcoming of great limitations in the removal of pollutants, first of all, the forbidden band width of TiO₂（3.2 eV） wide can only accept below 380 nm uv light, can’t effective use of solar energy,more importantly, nanometer TiO₂ powder suspended in solution after photocatalytic reaction is difficult to recycle.Based on the electrostatic spinning technology hydrothermal solvent（hot） and the preparation of TiO₂/PAN composite nanofibers photocatalytic materials, studies have shown that anatase type TiO₂ nanocrystals with smaller size and higher crystallization, and scattered load successfully in PAN nanofibers on the carrier.By XRD, SEM, TEM and UV-Vis/DRS, FT-IR and other means to analyze the composite nanofibers.Using different devices, and change the TiO₂ load,phenol initial pH value,initial concentration of phenol on TiO₂/PAN composite nanofibers catalyst for the study of the degradation of phenol,the results show that composite nanofibers materials photocatalytic efficiency is relatively high.Photocatalytic reaction device design and assembly to TiO₂/PAN composite nanofibers as catalyst,application of photocatalytic oxidation technology for simulating flue gas desulfurization denitration technology experiment at the same time.The load of titanium,the humidity of flue gas, flue gas velocity, inlet temperature of flue gas desulfurization denitration efficiency.Results showed that the optimum technological conditions: titanium load At % 6.78, flue gas humidity of 5%,the flue gas flow rate of 200mL/min,400 c flue gas inlet temperature, SO2 removal efficiency of 99.3%, the NO removal efficiency of 71.2%, also the service life of the catalysts and circulating regeneration are analyzed.Studies have shown that titanium dioxide（TiO₂）/polyacrylonitrile（PAN） nano composite materials have high catalytic efficiency,long life and renewable reuse,has the very good development prospect in industry.