Preparation Of Metal-Organic Frameworks And Their Absorption Behavior To Harmful Gases

Release of harmful chemicals into our environment is a growing national security concern. A number of industrial chemicals produced in excess of 1 million tons/year worldwide are also highly toxic and can be obtained with relative ease.Effective capture of these chemicals is of great importance both to the protection of the environment and to those who are at risk for being exposed to such materials. General-purpose filters are often composed of activated carbon impregnated with copper, silver, zinc, and molybdenum salts. Although such filters have proven to be effective in containing a range of toxic gases, they are not adequately effective against all potential threats. The current applications of activated carbons and any needed improvements on its current performance are largely limited by lack of control over the metrics and functionality of the pores because of the highly amorphous nature of its carbon network. Such obstacles must be overcome if materials are to be developed to address any conceivable harmful chemical. Metal-organic frameworks (MOFs) are a new class of crystalline porous materials, the structure of which is composed of metal-oxide units joined by organic linkers through strong covalent bonds. The flexibility with which these components can be varied has led to an extensive class of MOF structures with ultrahigh surface areas, far exceeding those achieved for porous carbons.The subject in the early accumulation of work experience and relevant literature on the basis of reported,use the Cu,Zn,Ni as metal-oxide units and the BTC and BDC as the organic linkers through strong covalent bonds, synthesis the Typical metal- organic frameworks. Study The absorption performance to formaldehyde,Methanol,Acetone,Trimethylamine,Toluene vapor of metal- organic frameworks was studied.then Finishing to the fabrics,study the absorption performance of the fabrics.the study shows metal- organic frameworks fabrics have good performance to formaldehyde,Methanol,Acetone,Trimethylamine,Toluene vapor.