Enhancing electrochemical properties of TiO2 nanotubes via engineered defect laden crystal structures
Enhancing electrochemical properties of TiO2 nanotubes via engineered defect laden crystal structures
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DOI：
10.1016/j.matlet.2020.127956
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发表时间：
2020-08-15
影响因子：
3
通讯作者：
Carlson, Krista
中科院分区：
文献类型：
--
作者：
Malik, Hammad;Barrera, Kai;Carlson, Krista
本研究确定了二氧化钛纳米管（NTs）含有特定浓度和晶体结构内的缺陷位置的电化学性能的依赖性。将通过电化学阳极氧化形成的NT在500 ℃下在氧气（O-2-NT）或2%氢气和氮气平衡（2%H-2/N-2-NT）中退火。用扫描/透射电子显微镜对碳纳米管进行了观察，结果表明，O-2-碳纳米管由锐钛矿-金红石混合相组成，而2%H-2/N-2-碳纳米管主要由充满缺陷的无序表面层组成。电化学阻抗测试结果表明，与O-2-NTs相比，2%H-2/N-2-NTs的电化学行为增强，这是由于缺陷负载结构的结果. (C)2020爱思唯尔B. V.保留所有权利。
This study identifies the dependence of electrochemical properties of titanium dioxide nanotubes (NTs) containing specific concentrations and locations of defects within the crystal structure. NTs, formed through electrochemical anodization, were annealed at 500 degrees C in either oxygen (O-2-NTs) or 2% hydrogen with nitrogen balance (2%H-2/N-2-NTs). Examination of the NTs using scanning/transmission electron microscopy showed that the O-2-NTs were comprised of a mixed phase anatase-rutile, while the 2%H-2/N-2-NTs were primarily anatase with a defect laden disordered surface layer. Electrochemical impedance measurements showed enhanced electrochemical behavior of the 2%H-2/N-2-NTs compared to the O-2-NTs as a result of the defect-laden structure. (C) 2020 Elsevier B.V. All rights reserved.