Study On Synthesis And Photocatalytic Performance Of Supported Metal Phthalocyanine

Phthalocyanine is a macrocyclic compound whose chemical structure resemblesporphyrin, It has been more than100years since phthalocyanine was first discovered byA.Braun professor and T.C.Tcherniac professor in1907, while researches about it havealways been prevalent. Phthalocyanine, is a high conjugate structure of18π electronicsystem. These compounds show unique light properties due to it can absorb the visible light,making it have considerable value in the research and practical applications.Researches about the photocatalytic photocatalytic degradation of certain pollutants inthe environment, were well received. All these reactions could occur under room temperatureand atmospheric pressure. And only need the right amount of oxygen, light and water, manyorganic contaminants will be degraded or converted, the degradation of the product aregenerally non-toxic harmless small molecules. The photocatalytic technology both from theadsorbent capacity and regeneration limit, nor concerns about chemical and biological agentpoisoning and decreased activity, with high conversion, low cost, secondary pollution is lessand other advantages, is expected to develop the next generation of environmentally friendlynewtechnology.Metal phthalocyanines have good photocatalytic oxidation capability. Phthalocyanine asa catalyst easily oxidized gathered to make the catalytic activity decreased; difficult from thereaction system as a homogeneous catalyst, can not be recycled to re-use and other defectsexist in the actual application process. In recent years, the study on phthalocyanines polymermaterials has made a great development. From the application perspective, Polymers havecharacteristic of various type, different properties. If we can made phthalocyanines supportedon polymers, these questions can be avoided. This paper is synthesis of a phthalocyaninecatalyst, and use it for photocatalytic degradation of simulated wastewater and formaldehydegas.In this paper, taking acrylonitrile and maleic anhydride as raw material, aacrylonitrile-maleic anhydride copolymer with excellent properties for film-forming wassynthesized through researches and discussions of monomer ratio, dosage of initiator and reaction time. And then, chemical grafting has been employed to introduce cobaltphthalocyanine onto this polymer. PcCo-PANCMAn are characterized with IR, UVcharacterization, and it is proved to generate the phthalocyanine compound. The degradationexperiments of Rhodamine B by film forming PANCMAn with photocatalytic propertieswere performed. The factors that affect the degradation rate such as pH value, temperatureand the amount of catalyst was studied. The experimental results demonstrate that pH valuehas much effect on the degradation effect, The PANCMAn exhibites the well degradationeffect to Rhodamine B under the acidic condition. For the30mg/L solution of Rhodamine B,the decolorization rate is almost90%when pH value is2.05and the amount of catalyst is0.04g/L. But the temperture cause minor infections on the degradation effect.The degradation experiments of methanal by film forming PANCMAn were alsoperformed. The factors that affect the degradation rate such as different film samples, reactiontemperature and reaction time was studied, too. The experimental results indicate that thisfilm forming PANCMAn has the most obvious effect on the degradation of methanal. Thedegradation rate was more obviously increased as the time of reaction was extended and thetemperature was rised. The degradation effect is88.2%when temperature is45℃and thereaction period is4hours.