Titania Tube-in-Tube Scaffolds with Multilength-Scale Structural Hierarchy and Structure-Enhanced Functional Performance
Titania Tube-in-Tube Scaffolds with Multilength-Scale Structural Hierarchy and Structure-Enhanced Functional Performance
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具有多长度尺度结构层次和结构增强功能性能的二氧化钛管中管支架
DOI：
10.1021/acs.jpcc.5b04125
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发表时间：
2015-08-06
影响因子：
3.7
通讯作者：
Xu, Yan
中科院分区：
文献类型：
--
作者：
Huang, Haibo;Wang, Yun;Xu, Yan
层次化结构已被证明是优化纳米材料功能性能的有效方法。在此，我们首次报道了具有多长度尺度结构层次（TITS TiO2）和结构增强功能性能的二氧化钛管中管脚手架结构的演变。该纳米工程采用前体支架-同步外延生长的方法，以细菌纤维素（BC）作为生物支架。夹有SiO2层的BC@SiO2@TiO2前驱体支架在管中管几何结构的形成中起着至关重要的作用。TITS TiO2对Degussa P25表现出显著的光催化活性。它具有很强的紫外光吸收能力和较高的比表面积，我们认为这是其具有优异光催化活性的原因。TITS TiO2的整体特性使得光催化剂的分离和回收成为可能。我们表明TiO2纳米晶体可以作为复杂结构的组成部分。
Hierarchical structuration has proven to be effective in optimizing the functional performance of nanomaterials. Herein, we report for the first time the evolution of a titania tube-in-tube scaffolding architecture with multilength-scale structural hierarchy (TITS TiO2) and structure-enhanced functional performance. The nanoengineering was accomplished by a precursor scaffolding-concurrent epitaxial growth approach using bacterial cellulose (BC) as a bioscaffold. The BC@SiO2@TiO2 precursor scaffold with a sandwiching SiO2 layer plays an essential role in the formation of the tube-in-tube geometry. TITS TiO2 exhibits significantly superior photocatalytic activity to Degussa P25. It shows great UV light absorption ability and high specific surface area, which we believe are responsible for its superior photocatalytic activity. The monolithic nature of TITS TiO2 makes photocatalyst separation and recovery possible. We show that TiO2 nanocrystals can be used as a building block for the organization of complex...