| Summary: | 碩士 === 國防大學理工學院 === 化學工程碩士班 === 101 === Study on the preparation of mesoporous silica that obtained from the agricultural waste rice husk (RH). In order to investigate the influence of the calcination temperature on the pore structure, the rice husk was washed with water and calcined at 600、700、800、900 °C to get rice husk ash (RHA). All samples are characterized with XRD, BET, SEM, and TEM instruments. The low-angle XRD patterns and N2 adsorption-desorption curve indicate that the MS-C6; MS-C7 and MS-C8 samples show a structure of mesoporous silica with high surface area, respectively. Further identified the MS-C7 sample posses an ascidia-shape structure with SEM/TEM, analysis. Application on the adsorption of methylene blue dye solution over the series MS-CX samples indicate that the order of adsorption capacity arranges as MS-C7> MS-C8> MS-C9.
The TiO2/MS-C7 photocatalysts were prepared by the adsorption method. The support is MS-C7, the Ti-precursor is Tetra-n-butyl-orthotitanate (TBOT). Three samples proceed once, twice and three adsorption and assigned as TiO2-1/MS-C7, TiO2-2/MS-C7 and TiO2-3/MS-C7. The photocatalytic activities of the samples were evaluated by degradation of MB under a stimulated UV lamp ( λ = 300 nm). The results show that the TiO2-3/MS-C7 sample possesses the highest activity.
Both the Pd/MS-C7 and Pt/MS-C7 are prepared H2-storage materials by the incipient wetness impregnation method. The capacity of hydroge adsorption is evaluated with the high-pressure gravimetric method under room temperature. The results show that the order of hydrogen adsorption capacity arranges as Pd/MS-C7 > Pt/MS-C7 > MS-C7.
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