Fabrication of titania nanoparticle with various surface structures through simple sol-gel chemistry

Fabrication of titania nanoparticle with various surface structures through simple sol-gel chemistry
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Recently, titanium dioxide (TiO2) has been recognized as one of the most effective metal oxide materials due to its high photocatalytic efficiency, photochemical stability, non-toxic nature, and low cost. With these advantages, TiO2 nanomaterials have been widely used in practical applications such as photocatalysis, chemical sensors, and solar cells. In this study, titania nanoparticle with various surface structure was prepared using polystyrene-block-poly(ethylene oxide) diblock copolymer also F127 surfactant as structure-directing agents and titanium tetraisopropoxide as titanium precursor. The titania particle was fabricated by simply drop-casting method from mixture solution containing polymer solution and the precursor via sol-gel reaction. It was observed that organic solvent vapor and concentration of polymer were important factors to form the spherical nanoparticle had various surface structure. Addition of F127 surfactant to the mixtuere solution containing PS-block-poly(ethylene oxide) and precursor induced variation of surface of titania nanoparticles. Calcination process was conducted to remove organic materials and to crystallize at high temperature. Structural characterization of titania films was conducted by using a combination of atomic force microscope (AFM), field emission scanning electron microscope (FE-SEM), and transmission electron microscope (TEM).
1. Introduction 1 2. Experimental section 4 2.1. Materials 4 2.2. Preparation of titania nanoparticles 4 2.3. characterization 5 2.3.1 Atomic force microscope (AFM) 5 2.3.2 Field-emission transmission electron microscope (FE-SEM) 5 2.3.3 Trasmission electron microscope (TEM) 5 3. Results and Discussion 7 4. Conclusion 23 5. Reference 24
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College of Engineering(공과대학) > Applied Organic Materials Engineering (유기응용재료공학) > Theses(유기응용재료공학 석박사 학위논문)
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