| Ta2O5空心球的制备及光催化性能 |
| Ta2O5 Hollow Sphere: Fabrication and Photocatalytic Activity |
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| 摘要: 采用无皂乳液聚合法合成了粒径为500 nm的聚苯乙烯(PS)球。运用层层自组装技术在PS球表面交替沉积单分子层的TaO3纳米页与聚二烯丙基二甲基氯化铵(PDDA)多层膜，650 ℃煅烧除去PS模板和PDDA高分子层后，得到Ta2O5空心球。空心球的直径为500 nm左右，壁厚约10 nm。XRD结果显示该空心球为正交晶系Ta2O5。空心结构显著提高了Ta2O5的光催化活性，在紫外光照射60 min后，Ta2O5空心球降解亚甲基蓝达90%以上，而商品Ta2O5只能降解28%。 |
| 关键词: 层层自组装 空心球 五氧化二钽 光催化 |
| 基金项目: |
| Abstract: Polystyrene (PS) spheres with a diameter of ~500 nm were prepared by emulsifier-free emulsion polymerization. TaO3 nanosheet crystallites and poly(diallyldimethylammonium chloride) (PDDA) were deposited on PS beads using layer-by-layer assembly technique. The hollow spheres of Ta2O5, with a diameter of ~500 nm and shell thickness of ~10 nm, were obtained by removing the PS core and PDDA layers at 650 ℃. XRD pattern confirms that the hollow spheres are orthorhombic Ta2O5. The hollow structure significantly improves the photocatalytic activity of Ta2O5. Under UV irradiation for 60 min, more than 90% of methylene blue is degraded in the presence of Ta2O5 hollow spheres, while it is only 28% for commercial Ta2O5 powders. |
| Keywords: layer-by-layer assembly hollow sphere Ta2O5 photocatalysis |
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| 郭国龙,黄建花.Ta2O5空心球的制备及光催化性能[J].无机化学学报,2011,27(2):214-218. |
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