氮化温度对TiO2纳米管结构及其光电化学性能的影响

T. Lemes, Lapec, Rs. Brazil, Sherdil Khan, E. L. Silva, L. L. Costa, S. Teixeira, C. Aguzzoli, C. Malfatti
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引用次数: 1

摘要

提高可见光区的光吸收,提高光电化学(PEC)响应;在此,我们提出了二氧化钛(TiO2)纳米管与氮掺杂。将TiO2纳米管在不同温度的氨环境下热处理3 h,采用场发射枪扫描电镜(fg - sem)、可见紫外分光光度法(UV-Vis)对其进行表征。样品在Na2S/Na2SO3 (aq)溶液中进行了光电化学测试。结果表明,在600℃以上的温度下,二氧化钛的氮掺杂会导致管状结构的坍塌,从而降低了PEC的性能。另一方面,在较低温度下氮化样品的PEC性能得到改善,这与TiO2纳米管结构中缺陷的形成较少有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of nitridation temperature on TiO2 nanotubular structure and its photoelectrochemical performance
To improve light absorption in the visible region and to improve photoelectrochemical (PEC) response; herein, we have presented the doping of titanium dioxide (TiO2) nanotubes with nitrogen. TiO2 nanotubes have been heat treated under the ammonia environment at different temperatures for 3 h. The characterization was carried out using field emission gun scanning electron microscopy, (FEG-SEM), visible ultraviolet (UV-Vis) spectrophotometry. The photoelectrochemical tests of the samples were carried out in a Na2S/Na2SO3 (aq) solution. It was found that the nitrogen doping of titanium dioxide in temperature above 600 °C collapses the tubular structure and decreases the PEC performance. On the other hand, PEC performance improving was obtained from the sample nitrided at the lower temperatura which is related to the formation of lower defects in the structure of TiO2 nanotubes.
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