Study on Synthesis and Photocatalytic Activity of Supported Phthalocyanine
|Course||Polymer Chemistry and Physics|
|Keywords||Phthalocyanine Styrene - maleic anhydride Formaldehyde Photocatalytic Degradation|
Phthalocyanine (Phthalocyanine Pc) is an ancient organic compounds, since 1907, first discovered by scientists, there are over a hundred years of development history, and people around the phthalocyanine has been enduring. Due to the unique physical and chemical properties of phthalocyanine complexes in terms of the field of scientific research or industrial production has a very important application value. In recent years, a great deal of attention on the use of phthalocyanine photocatalytic degradation and transformation of certain pollutants in the environment. These reactions can occur at room temperature and atmospheric pressure, and only need the right amount of oxygen, light and water, you can make many organic pollutants degradation or conversion, generate CO 2 , inorganic ions and easily biodegradable small molecules. Compared with the existing incineration, adsorption, biological oxidation and other environmental photocatalytic oxidation technology of this depth both adsorbent adsorption capacity and regeneration limit, nor the biochemical agent poisoning and decreased activity concerns with the conversion rate high, low cost, less secondary pollution, is expected to develop into the next generation of environmental technology. And phthalocyanine easy to gather features will make it reduced catalytic activity is not conducive to recycling, such as phthalocyanine is able to load, you can put an end to these shortcomings polymers. This project is to synthesize a load phthalocyanine catalyst, the phthalocyanine efficient catalytic activity of photocatalytic degradation of formaldehyde gas. Today, in the new production of furniture, wall decoration, laying on the ground with a variety of man-made sheet must use adhesives. Any extensive use of adhesive, there is always the release of formaldehyde. In addition, some synthetic carpets, paint and coatings also contain a certain amount of formaldehyde. These interior decoration materials, the release of formaldehyde period of up to 3 - 15 years, long-term living in environments containing low concentrations of formaldehyde can cause chronic respiratory diseases as well as cancer of the human physiological function, therefore, formaldehyde has become the most common and hazards the most typical indoor volatile organic pollutants, should be particularly attracted the attention of academia and research. Formaldehyde purification methods for activated carbon, zeolites and other porous materials adsorption and catalytic decomposition of titanium dioxide photocatalytic materials. However, limited by the capacity of the adsorbent, as well as the presence of elevated ambient temperatures occur disadvantage of desorption, adsorption alone and can not fundamentally solve the pollution of formaldehyde. Pure titanium dioxide photocatalytic materials catalytic efficiency is low, and only in order to play in the UV conditions photocatalysis and weaknesses. Therefore, as soon as possible to develop a cost-effective air purification materials seem imperative, this is precisely where the research significance. The first chapter from the perspective of historical development, structure, nature and synthetic applications of phthalocyanine complexes were introduced, made a detailed overview containing phthalocyanine polymer content, but also the two-dimensional infrared spectroscopy knowledge seriously, and finally, the purpose and significance of the research projects. The second chapter is PCCO-SMA supported phthalocyanine catalyst preparation process in detail, and by IR, UV-visible spectrum on the steps (NH 2 ) 4 the PCCO, SMA and PcCo-SMA were characterized, prove the the (NH 2 ) 4 PcCo and SMA have been grafted into the key. Finally, using TG / DTA thermal analysis instrument to its thermal performance testing and analysis, the test results show that the (NH 2 ) 4 PcCo has good thermal stability, load (NH of 2 ) PCCO the thermal performance of the carrier itself did not have a significant impact. The third chapter elaborates supported phthalocyanine catalyst PcCo-SMAA preparation process, and the steps SMAA and PcCo-SMAA infrared spectroscopy, UV-visible spectral characterization, proved (NH 2 sub >) 4 PcCo SMAA has been grafted into the key. Finally, TG / DTA thermal analyzer PcCo-SMAA thermal performance testing and analysis, the test results show that the addition of acrylonitrile may be system solubility and intermolecular steric impact, so that part of the maleic anhydride failed to aggregate into the block, and the thermal performance of the carrier itself is not obvious, but the decomposition of the final temperature relative to the SMA ahead of 40 ° C. CHAPTER load photocatalyst film sample preparation process and the formaldehyde content analysis and testing methods of the detailed description; then in the a homemade light catalytic reaction apparatus, a xenon lamp as the light source, a photocatalyst for two types of load film sample test of the photocatalytic degradation of formaldehyde gas; Finally, the the TiO2 and four amino cobalt phthalocyanine doped the SMAA graft made photocatalyst film, and this doped TiO2 photocatalyst thin films the catalytic performance of the test. Experimental results show that these three photocatalyst film formaldehyde have a catalytic catalytic efficiency PCCO / the TiO 2 -SMAA gt; PCCO-SMAA gt; the PCCO SMA, further evidence of phthalocyanine by TiO < sub> 2 after doping can be more effective utilization of the energy of visible light to improve the catalytic efficiency. The fifth chapter is the use of two-dimensional infrared spectroscopy, temperature perturbation PcCo-SMA polymer two-dimensional correlation infrared spectroscopy study.