Thermoplasticity Of Superfine Wool Powder And Its Blending With Polypropylene

Manganese oxide has the advantages of rich content and environmental protection,and is widely used in production and daily life.In addition,manganese oxide can also efficiently activate peroxymonosulfate（PMS）to generate singlet oxygen（¹O₂）.In this thesis,three manganese oxide composite materials Mn₃O₄/g-C₃N₄,Mn₃O₄/Fe₂O₃ and MnO₂/CuO were prepared by the impregnation-pyrolysis method.The three manganese oxides activate permonosulfate（PMS）to generate singlet oxygen.（¹O₂）The degradation efficiency of toxic organic pollutants in wastewater was studied,and the degradation of pollutants in different water bodies was studied to provide a certain theoretical basis for actual wastewater treatment.The main papers of the paper are as follows:（1）The Mn₃O₄/g-C₃N₄catalyst was prepared by the impregnation-pyrolysis method,and the structure of the material was characterized and analyzed by XRD,SEM,TEM and XPS techniques.The preparation conditions such as the loading amount of Mn₃O₄and the calcination temperature,as well as the influence of the reaction conditions in the activity experiment on the catalytic degradation performance of BPA were explored,and it was found that when the loading amount of Mn₃O₄was 7%and the calcination temperature was 600℃,the degradation rate of BPA in the system can be reached at 30 min.It reaches 90%,and the degradation rate of BPA increases with the increase of the catalyst dosage,the increase of the PMS concentration and the decrease of the initial BPA concentration.Free radical quenching experiments and electron paramagnetic resonance（EPR）analysis show that the main active species in the system is¹O₂.Recycling experiments show that after the second calcination treatment,the catalyst has good reusability.After 10consecutive cycles of use,BPA can still maintain a degradation rate of more than95%.（2）The catalyst Mn₃O₄/Fe₂O₃was synthesized by the impregnation-pyrolysis method,and the structure of the material was characterized and analyzed by XRD,SEM,TEM,XPS and other techniques.The preparation conditions such as the loading ofMn₃O₄and the calcination temperature as well as the influence of the reaction conditions on the catalytic degradation of BPA were explored.It was found that when the molar ratio of Mn₃O₄ to Fe₂O₃in the composite material was 7:1 and the reaction conditions were at the calcination temperature of 400℃the degradation of BPA in the system after 30 minutes of reaction The rate can reach 98%,and when the catalyst dosage increases,the PMS concentration increases and the initial BPA concentration decreases,the corresponding BPA degradation rate also increases.Free radical quenching experiments and electron paramagnetic resonance（EPR）analysis show that the main active species in the system is¹O₂.Cycle experiments show that the prepared catalyst 7-Mn₃O₄/Fe₂O₃has good cycle performance.After 8 consecutive uses,the degradation rate of BPA can still reach more than 90%.（3）MnO₂/CuO was synthesized by immersion-pyrolysis method,and the material was characterized and analyzed by XRD,SEM,TEM,XPS and other techniques.The preparation conditions of the catalyst and the influence of each reaction condition on the catalytic degradation of TTCH were explored.It was found that when the molar ratio of MnO₂ to CuO is 5:1,the calcination temperature is 400℃and the degradation efficiency of TTCH can reach 85%within 30 minutes,and when the dosage of the catalyst increases,the PMS concentration increases and the initial The degradation rate of TTCH increases when the concentration of Rh B decreases.Free radical quenching experiments and electron paramagnetic resonance（EPR）analysis show that the main active species in the system is¹O₂.Cycling experiments show that the catalyst has good reusability.After 10 consecutive cycles of use,TTCH can still maintain a degradation rate of more than 70%.