3D hierarchical macro/mesoporous TiO2 with nanoporous or nanotubular structures and their core/shell composites achieved by anodization
3D hierarchical macro/mesoporous TiO2 with nanoporous or nanotubular structures and their core/shell composites achieved by anodization
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具有纳米孔或纳米管结构的3D分级宏观/介孔TiO2及其通过阳极氧化实现的核/壳复合材料
DOI:
10.1039/c7ce00429j
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发表时间:
2017-05
期刊:
影响因子:
3.1
通讯作者:
Liu Hong
中科院分区:
文献类型:
--
作者:
Jia Dedong;Qi Zhen;Li Xuequan;Li Linlin;Shao Li-Hua;Liu Hong
TiO2 is one of the most extensively investigated materials owing to its unique properties and several promising applications. The properties of TiO2 are highly dependent on its microstructure and feature size. Herein, we report a strategy for the synthesis of hierarchical porous TiO2 with two distinguishable scales of ligament sizes, which consists of both macro-pores and meso-pores. A metallic melt dealloying process with CuTi alloy was followed to form a porous Ti precursor. Subsequently, this precursor was used as a substrate for anodization to form TiO2. By controlling the anodization potential, time and initial porous Ti ligament size, nanotubular nanotubes or nanoporous TiO2 were distributed uniformly on the ligaments of porous Ti. Both the sizes of the macropore (400 nm to 2 μm) and mesopore (10 to 30 nm) can be tuned. A core–shell structured TiO2/Ti composite with a nanoporous or nanotubular structure in the shell and un-anodized porous Ti in the core can be achieved by partial anodization. The hierarchical structure with high surface area is essential for mass transport (large pore) and functionality (small pore), which makes it a potential candidate for various applications such as in sensors and catalysts.
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作者:
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通讯作者:
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影响因子:
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10.1016/j.msea.2013.06.015
发表时间:
2013-10
影响因子:
6.4
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通讯作者:
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