nanosurface 2007-08-07 21:52
专题文库:空心微球制备及其性能和应用
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[size=4][b]Template-free Hydrothermal Synthesis of CuO/Cu2O Composite Hollow Microspheres[/b][/size]q:VL_@9ppR
Huogen Yu, Jiaguo Yu, Shengwei Liu, and Stephen MannIzakN6i
[b][i]Chem. Mater.[/i][/b]; 2007; ASAP Web Release Date: 28-Jul-2007; (Article) DOI: 10.1021/cm070386d&q2]o ^3R
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CuO/Cu2O composite hollow microspheres with controlled diameter and composition were prepared without the addition of templates and additives by hydrothermal synthesis using Cu(CH3COO)2·H2O as a precursor. Increasing the precursor concentration from 0.02 to 0.2 M increased the diameter of the composite hollow microspheres from 500 nm to 5 m. Moreover, the content of Cu2O in the composite hollow microspheres increased with increasing the reaction time or/and precursor concentration to produce a range of composite hollow microspheres with Cu2O contents from 20 to 80 wt %. A localized Ostwald ripening mechanism was proposed to account for the formation of CuO/Cu2O composite hollow microspheres. The photocatalytic activity experiment indicated that the prepared CuO/Cu2O composite hollow microspheres exhibited a higher photocatalytic activity for the photocatalytic decolorization of methyl orange aqueous solution under the visible-light illumination than the single phase CuO or Cu2O samples. c&vAa
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[[i] 本帖最后由 nanosurface 于 2007-08-07 08:57 编辑 [/i]]
nanost-admin 2007-09-06 21:46
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