Study On Perovskite And Metal-Organic Framework Of Wool Fiber And Different Scales Structure

This paper is based on wool.In the first part,the combination of chemical and physical methods is used to remove the wool scales by formic acid and mechanical agitation.The descaled wool is used as a carrier and Fe₃O₄/dopamine/ZIF-8 is loaded to prepare a composite material capable of adsorbing heavy metal ions.In the second part,the separation and application of wool microstructures are studied in depth.The oil bath is heated to boil the formic acid to swell wool without cuticle layer,and then the wool structure is decomposed by mechanical stirring and ultrasonic irradiation to obtain cortical cells composed of wool fiber structure.The effects of formic acid heating and mechanical stirring time and ultrasonic irradiation time on wool decomposition were explored,and the optimal cortical cell separation process was optimized.The orthocortical cells and paracortical cells were isolated and extracted,and orthocortex and paracortex were dyed by methylene blue.The catalysts with visible light catalysis were prepared by hydrothermal loading of nano-TiO₂ with wool cortical cells as carriers.In the third part,A wool-doped BiFeO₃/TiO₂ photocatalytic material was prepared and its photocatalytic properties were briefly investigated.The morphology and structure were characterized by scanning electron microscopy,transmission electron microscopy,X-ray diffraction,infrared spectroscopy,thermal analysis and UV-visible diffuse reflectance spectroscopy,and the properties were determined.Results are as follows:?1?When the formic acid boiling mechanical stirring treatment time is 20 min,the wool scales are completely removed.The surface of the descaled wool fiber after modification has formed Fe₃O₄ particles layer,polydopamine layer and ZIF-8 layer,and the nano-Fe₃O₄ particles infiltrated into the internal structure of the descaled wool.The modified descaled wool has superparamagnetic properties and a saturation magnetization of 83.133 emu/g.The modified wool absorbs heavy metal chromium ions significantly,and the adsorption amount is Qe_{wool/dopamine/ZIF-8}=1.9 mg/g,and the removal rate is Rewool/dopamine/ZIF-8=38%.?2?The optimal separation process of wool structure was as follows:formic acid boiling and stirring time was 180 min,ultrasonic time was 60 min,orthocortex and paracortex were successfully separated by equilibrium density gradient centrifugation,and ex and paracortex were differentiated by methylene blue staining.orthocortical cells were stained dark blue by methylene blue and light blue by paracortical cells.The orthocortex after hydrothermal loading of nano-TiO₂ absorb the most visible light,and the band gap is narrowed to 2.69 eV.The degradation of methylene blue was the best.After 70 min of visible light,the degradation rate reached 92%.The degradation rate constant k was the largest and the photocatalytic activity was the best.?3?The band gap of wool-doped BiFeO₃ was narrowed.The powder-loaded TiO₂prepared by calcining the scaled wool with one-time BiFeO₃ sol had the best photocatalytic performance,and the apparent rate constant was the highest,k_app=0.01999 min^-1.Figures:35,Tables:6,References:65...