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首页> 外文期刊>Applied Nanoscience >Charge-transfer peculiarities in mesoporous BiVO 4 surfaces with anchored indoline dyes
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Charge-transfer peculiarities in mesoporous BiVO 4 surfaces with anchored indoline dyes

机译：带有锚固二氢吲哚染料的介孔BiVO 4表面中的电荷转移特性

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摘要

Mesoporous thin films of bismuth vanadate were synthesized by sol–gel method with defined deposition parameters and annealing treatments leading to nano-textured surfaces. The stabilization of monoclinic BiVO4 structure was demonstrated by structural investigations and nano-islands morphology of the films illustrated by Atomic Force Microscopy (AFM) studies. Indoline dyes (D149) were used to sensitize the film surfaces able to show photoinduced charge transfer on the hybrid surfaces using Kelvin force microscopy (KFM). The distributions of the surface electrical potentials were compared as function of the surface texture and the sensitization by dyes. A model of the band alignment in hybrid systems was proposed to account for the observed charge transfer. The photocatalytic activity of the hybrid films was also investigated and discussed.
机译：钒酸铋的介孔薄膜是通过溶胶-凝胶法合成的，具有确定的沉积参数和退火处理，从而形成纳米结构化的表面。通过原子力显微镜（AFM）研究说明的薄膜结构研究和纳米岛形貌证明了单斜BiVO4结构的稳定性。使用开尔文力显微镜（KFM），使用二氢吲哚染料（D149）敏化能够在杂化表面上显示光诱导电荷转移的薄膜表面。比较了表面电势的分布与表面纹理和染料敏化的关系。提出了混合系统中能带对准的模型来解释观察到的电荷转移。还研究和讨论了杂化膜的光催化活性。

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