State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
J Colloid Interface Sci. 2012 Mar 15;370(1):117-23. doi: 10.1016/j.jcis.2011.12.055. Epub 2011 Dec 29.
The reticular hierarchical structure of butterfly wings (Papilio Paris) is introduced as template for Au/TiO(2) photocatalyst by depositing the Au nanoparticles on TiO(2) matrix, which is carried out by a water-ethanol sol-gel procedure combined with subsequent calcination. The obtained Au/TiO(2) nanocomposites present the reticular hierarchical structure of butterfly wings, and Au nanoparticles with an average size of 7 nm are homogeneously dispersed in TiO(2) substrate. Benefiting from such unique reticular hierarchical structure and composition, the biomorphic Au/TiO(2) exhibits high-harvesting capability and presents superior photocatalytic activity. Especially, the biomorphic Au/TiO(2) at the nominal content of gold to titanium of 8 wt% shows the highest photocatalytic activity and can completely decompose methyl orange within 80 min, which is obviously higher than that of commercial Degussa P25 powders.
蝴蝶翅膀的网状分层结构被引入作为 Au/TiO(2)光催化剂的模板，通过将 Au 纳米颗粒沉积在 TiO(2)基体上实现，这是通过水-乙醇溶胶-凝胶程序与随后的煅烧结合完成的。所得到的 Au/TiO(2)纳米复合材料呈现蝴蝶翅膀的网状分层结构，并且平均尺寸为 7nm 的 Au 纳米颗粒均匀地分散在 TiO(2)基体中。得益于这种独特的网状分层结构和组成，仿生 Au/TiO(2)表现出高捕获能力并呈现出优异的光催化活性。特别是，在名义金含量对钛的含量为 8wt%的情况下，仿生 Au/TiO(2)表现出最高的光催化活性，并且可以在 80 分钟内完全分解甲基橙，这明显高于商业 Degussa P25 粉末。
