| Nowdays, the issues of environmental and global energy is the main bottleneck to restrict the development of society. More and more environment-friendly materials intrigue widely intereting to scientists, the materials with special morphology and structure which possess of good properties are expected to be the solution to the issue of depletion of fossil energy. In particularly, the silica materials have a rapid development in recent years.In our experiment, we have obtained MCM-41 and SBA-15 by sol-gel method, furthermore, we try to change some condition of the synthesis condition to fabricate spherical products. Ultimately, we combined mesoporous materials with hollow spherical materials for producing a novel material, which is possess of the both properties belonging to the above two interesting materials, and expect to apply these materials in the dye adsorption area.Mesoporous silica hollow spheres were synthesized by a modified stober method, process, using TEOS as an inorganic precursor and cetyltrimethylammonium bromide (CTAB) and positively charged PS latex as binary structure-directing agents. Upon calcination, the resultant shell of the silica products possess a wormlike mesoporous structure with a pore diameter of about 2 nm, a large specific surface area ranging from 192.43 m2/g to 1515.53 m2/g. The thickness of the shell is tunable from 20nm to 60nm by adjusting the rate of TEOS/PS. Many techniques were employed to characterize the sample, such as Nitrogen adsorption-desorption isotherms (BET), scanning electron microscopy (SEM), Field emission scanning electronic microscopy (FESEM),transmission electronic microscopy (TEM) and so on. In this paper, we also use ultraviolet-visible spectrophotometry (UV-visible) to study the methyl blue adsorbed into the hollow spherical mesoporous silica:... |
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