Dye Degradation And Selective Catalytic Oxidation Of Cyclohexene By Catalyst Of Calcined Cobalt Phthalocyanine

Water is the source of life. The water resource of our country is insufficient and the water quality disaster usually occurs. In recent years, the shortage of water resource has become more and more serious. The physical and biological method and chemical method in industrial application is often used. The physical and biological methods are not ideal for some organic pollutants, which are difficult to degrade and toxic. Advanced oxidation process has received extensive attention in recent years. Most organic pollutants can be oxidized by the hydroxyl radicals(?OH) produced in the process of advanced oxidation process and degraded to small molecules that are biodegradable. However, the oxidation of ?OH is not selective and the activity is easy to be affected by the complex environment of industrial wastewater. Therefore, the researchers began to study with a selective, high valence metal active species which is similar to enzyme activity. In addition, the reuse of pollutants in industrial waste water is also an important issue, so selective catalysis has received wide attention. By selective catalytic reaction, some products can be obtained which are hard to be obtained by the common methods. It can save energy and achieve the sustainable development.In this paper, carbon fiber load cobalt phthalocyanine(CF/CoPc) was synthesized by solvent thermal one step method, and the CF/CoPc was treated with different temperature under air condition. Through the characterization contrast of the CF/CoPc and pyrolysis various cobalt phthalocyanine catalyst, we found the catalyst after the heat-treated is a composite catalyst which contains organic and inorganic components. The catalytic oxidation performance of the catalyst was tested and the acid red was used as the target pollutant. Through the test, we found that the activity of cobalt phthalocyanine was improved by solvent thermal synthesis. By comparing the activity, we found that the catalyst calcined at 410 °C has the best catalytic activity in the pyrolysis of cobalt phthalocyanine and better than CF/CoPc. The mechanism analysis of CF/CoPc-410 and CF/CoPc show that the mechanism of the catalyst was changed after calcinations and there was no ?OH detected in the CF/CoPc-410/H2O2 system. A high valence cobalt active catalytic mechanism was speculated in it. The generation of ?OH was detected in the CF/CoPc/H2O2 system.The catalytic mechanism of CoPc-410 and CoPc is different, and the catalytic mechanism and product of the two catalysts were studied. The selective catalytic epoxidation of CoPc and CoPc-410 was compared to study the catalytic mechanism and product of the two catalysts. CoPc prepared by the solvothermal and CoPc-410 powder heated after 410 °C are used as catalysts to test their properties of the selective catalytic performance. The effects of the temperature, pH, the ratio of H2O2 and cyclohexene and the charging Method of H2O2 on the product were explored. The experimental results show that the main products of the CoPc-410/H2O2 system are the cyclohexenylene with a high selectivity. The main products of the CoPc/H2O2 system are the pimelie kelone with many kinds of side products and a lower selectivity. In this paper, reaction conversion rate and H2O2 utilization efficiency were improved by changing the method of adding oxidant and the adding speed of H2O2, however, the selectivity decreased at the same time.