Wagstaffe Michael, Jackman Mark J, Syres Karen L, Generalov Alexander, Thomas Andrew G
School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester, M139PL, UK.
Jeremiah Horrocks Institute, The University of Central Lancashire, Fylde Road, Preston, PR1 2HE, UK.
Chemphyschem. 2016 Nov 4;17(21):3430-3434. doi: 10.1002/cphc.201600774. Epub 2016 Sep 8.
The interaction of the ionic liquid [C C Im][BF ] with anatase TiO , a model photoanode material, has been studied using a combination of synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. The system is of interest as a model for fundamental electrolyte-electrode and dye-sensitized solar cells. The initial interaction involves degradation of the [BF ] anion, resulting in incorporation of F into O vacancies in the anatase surface. At low coverages, [C C Im][BF ] is found to order at the anatase(101) surface via electrostatic attraction, with the imidazolium ring oriented 32±4° from the anatase TiO surface. As the coverage of ionic liquid increases, the influence of the oxide surface on the topmost layers is reduced and the ordering is lost.
使用同步辐射光电子能谱和近边X射线吸收精细结构光谱相结合的方法，研究了离子液体[C C Im][BF ]与作为模型光阳极材料的锐钛矿型TiO 的相互作用。该体系作为基本电解质-电极和染料敏化太阳能电池的模型备受关注。初始相互作用涉及[BF ]阴离子的降解，导致F掺入锐钛矿表面的O空位中。在低覆盖度下，发现[C C Im][BF ]通过静电引力在锐钛矿(101)表面有序排列，咪唑环与锐钛矿TiO 表面呈32±4°取向。随着离子液体覆盖度的增加，氧化物表面对最顶层的影响减小，有序排列消失。
