当前位置: X-MOL 学术Sustain. Energy Fuels › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Optimised heterojunctions between [100]-oriented rutile TiO2 arrays and {001} faceted anatase nanodomains for enhanced photoelectrochemical activity†
Sustainable Energy & Fuels ( IF 5.6 ) Pub Date : 2018-04-20 00:00:00 , DOI: 10.1039/c8se00022k
Alfonso Ballestas-Barrientos 1, 2, 3, 4, 5 , Xiaobo Li 1, 2, 3, 4, 5 , Samuel Yick 1, 2, 3, 4, 5 , Anthony F. Masters 1, 2, 3, 4, 5 , Thomas Maschmeyer 1, 2, 3, 4, 5
Affiliation  

We report in this work the hydrothermal synthesis of [100]-oriented rutile TiO2 rods on FTO substrates. The presence of [100]-oriented rutile TiO2 nanorod arrays was confirmed using HRTEM and EBSD. It was found that by adjusting the concentration of HF, the growth of [100] oriented rutile TiO2 nanorod arrays and their heterojunctions with {001} faceted anatase TiO2 crystals can be achieved in a one-step synthesis procedure. The photoelectrochemical activity of the resulting thin films was tested in dihydrogen phosphate buffer (pH 7) and showed a dramatically increased activity. The photoelectrochemical activity, characterised using electrochemical impedance spectroscopy (EIS), revealed that contrary to the behaviour of the analogue anatase TiO2 phase, the presence of surface fluorine (F) has a beneficial effect in the photoelectron transport properties within the rutile TiO2 phase. The methodology developed in this work also showcases the reliability of using Raman microscopy and EBSD in the detailed characterisation of surface defects which provides a new insight for the creation of new and improved photoanodes with enhanced photoelectrochemical activity for photoelectrochemical driven reactions.

中文翻译:

优化的[100]取向金红石TiO 2阵列与{001}多面锐钛矿型纳米域之间的异质结,可增强光电化学活性

我们在这项工作中报告了在FTO衬底上水热合成[100]取向的金红石TiO 2棒。使用HRTEM和EBSD证实了[100]取向的金红石型TiO 2纳米棒阵列的存在。发现通过调节HF的浓度,[100]取向的金红石TiO 2纳米棒阵列及其与{001}多面锐钛矿型TiO 2的异质结的生长晶体可以一步合成的方法完成。在磷酸二氢缓冲液(pH 7)中测试了所得薄膜的光电化学活性,并显示出显着提高的活性。光电化学活性,使用电化学阻抗谱(EIS),其特征在于,显示,相反到模拟锐钛矿TiO 2的行为2相,表面氟(F的存在- )具有在光电子传输性的金红石型二氧化钛中的有益效果2阶段。在这项工作中开发的方法论还展示了在表面缺陷的详细表征中使用拉曼显微镜和EBSD的可靠性,这为创建新的和改进的具有增强的光电化学活性的光阳极提供了新的见解,从而促进了光电化学驱动的反应。
更新日期:2018-04-20
down
wechat
bug