실리카 나노입자를 이용한 금속착물형 탄소기공막의 제조 및 가스제거에의 응용
Preparation of Metal-Complexed Carbon Membrane Using Monodispersed Silica Nanoparticles and Application for removal of gases
화학과 물리 및 분석화학
xiv, 198 p.
VOCs TiO2 photocatalyst Adsorption type Silica nanoparticle Porous carbon membrane Complex;
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Recently pollution of air by various types of materials such as fine dust, volatile organic compound (VOC), and hydrofluoric acid has become serious. Among them, VOC is of particular concern, which is emitted from automobiles and from consumption of oil or organic solvents is growing. Aromatic compounds (eg., benzene), as members of VOC, are carcinogens doing serious harm to human's immune system, and must be removed before they are discharged. Removal of VOC can be achieved using catalysts such as transition metal oxide catalysts, TiO2 photocatalyst, or composite catalyst of a mixture of TiO2 and activated carbon. VOC removal with catalytic treatment may produce by-products that could become secondary sources of pollution, and thus air filter of adsorption type is drawing interest. In this study, a porous carbon membrane based on silica nanoparticle was prepared. Various synthesis parameters were systematically investigated to study the effects on the size and the size distribution of silica nanoparticles. The silica nanoparticles were pressurized into a disk, and then calcinated to obtain porous carbon membrane. Then the membrane was chemically treated with COOH group, and Ag was complexed on the surface of the membrane. The Ag-complexed carbon membrane showed gas-removal capacity of 5.90 x 10-3 mg butane/g which is about four times higher than that of TiO2 catalyst (1.55 x 10-3 mg butane/g). Results suggest the metal-complexed carbon membrane developed in this study has a high potential for application to removal of gases including VOCs. As it is based on adsorption, the process is harmless. Also anti-microbial and fine dust removal function were added.