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Synthesis and Properties of Organic-inorganic Hybrid TiO2 Photocatalytic Materials

Author: WangFengZuo
Tutor: HanSong
School: Northeast Forestry University
Course: Environmental Science
Keywords: Titanium dioxide Organic - inorganic hybrid Photocatalytic Hydrothermal Synthesis
CLC: O643.36
Type: Master's thesis
Year: 2011
Downloads: 75
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Abstract


Population, resources, environment and sustainable development of human society to face three major problems. Among them, the environment is a fundamental condition for the development of human society. Environmental pollution has become a major problem facing humanity, control pollution and protect the environment, the development of energy-efficient environmental technology is key to ensure sustainable development. Environmental catalytic technology is an effective means to quickly solve environmental problems. Emerging technologies in the field of environmental catalysis, the use of solar energy for environmental pollution control - photocatalytic technology in environmental management and energy development in recent years has been widespread concern. Photocatalyst pollutant itself or water and air, oxygen, negative oxygen ions and superoxide anion as an active oxidizing agent under mild conditions, to almost all contaminants degradation. Titanium dioxide photocatalyst has the advantages of high catalytic efficiency, non-toxic and harmless, chemical stability, cheap, and can be reused, so that it has the potential of economic efficiency, national environmental scientists in the field of environmental protection caused great interest applicable to research and development has also been extensive attention. This thesis is prepared organic - inorganic hybrid titania photocatalyst. Selection of methylene blue (Methylene blue) target contaminants, homemade photocatalytic reactor to evaluate its photocatalytic activity by measuring methylene blue decolorization rate. Selection of B-cyclodextrin and tetrabutyl titanate as precursor by hydrothermal synthesis method prepared organic - inorganic hybrid photocatalyst using XRD, SEM, TGA, XPS, FT-IR technology to its characterized. And the effects of pH value, the ratio of the initial reaction and hydrothermal reaction temperature on hybrid materials. The results showed that the synthesis of hybrid materials Ti02 chemically cooperation with; presence of B-cyclodextrin and pH value of hydrothermal temperature on product particle size and pore structure have a larger impact on the ratio of the initial reaction impact is not obvious ; photocatalytic activity tests showed that this kind of material having a photocatalytic activity, and also has a strong adsorption capacity. D-glucopyranose unit branch of the preparation of organic - inorganic hybrid photocatalyst using XRD their characterization indicates that the material for the sharp mixed crystals of anatase and brookite nano titanium dioxide; may be seen by SEM, the sample has a rich The pore structure. Evaluation of the product of the photocatalytic activity, and to explore the porous material of methylene blue dye adsorption and photodegradation mechanism. Experimental results show that the catalyst prepared by this method has a strong adsorption and photocatalytic capacity, the treatment of pollutants, especially low concentrations of pollutants governance has potential applications.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalyst
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