Double-Wall Anodic Titania Nanotube Arrays for Water Photooxidation
Double-Wall Anodic Titania Nanotube Arrays for Water Photooxidation
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DOI：
10.1021/la900426j
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发表时间：
2009-07-21
期刊：
影响因子：
3.9
通讯作者：
Misra, Mano
中科院分区：
文献类型：
--
作者：
John, Shiny E.;Mohapatra, Susanta K.;Misra, Mano
采用声电化学阳极氧化技术，结合独特的室温离子液体和有机电解质，合成了垂直取向的双壁二氧化钛纳米管（外径分别为82和206 nm）阵列。与类似的单壁纳米管（0.638 mA/cm（2））和商业纳米颗粒（0.365 mA/cm（2））相比，这些双壁纳米管阵列在太阳光照射下显示出2-4倍的光活性来分解水以产生氢气和氧气。将B和C部分掺杂到TiO 2基质中产生了这些双壁纳米管，其比本征TiO 2更有效地吸收可见太阳光。这些新结构的结构特性已被广泛研究，使用各种光谱，分析和电化学技术。
Vertically oriented double-wall titania nanotube (external diameters of 82 and 206 nm) arrays are synthesized by a sonoelectrochemical anodization technique in combination with a unique room-temperature ionic liquid and organic electrolyte. Compared to similar single-wall nanotubes (0.638 mA/cm(2)) and commercial nanoparticles (0.365 mA/cm(2)), these double-wall nanotube arrays show 2-4 times more photoactivity to split water under solar light illumination to generate hydrogen and oxygen. Partial doping of B and C into the TiO2 matrix gives rise to these double-wall nanotubes which absorb visible solar light more efficiently than the intrinsic TiO2. The structural properties of these novel structures have been studied extensively using various spectroscopic, analytical, and electrochemical techniques.