Tuning the Photocatalytic Activity of CdS Nanocrystals through Intermolecular Interactions in Ionic‐Liquid Solvent Systems
作者： Vincent Wing-hei Lau , Leon G. A. van de Water , Anthony F. Masters , Thomas Maschmeyer
关键词: Chemistry 、 Intermolecular force 、 Nanocrystal 、 Carboxylate 、 Photochemistry 、 Photocatalysis 、 Ionic liquid 、 Crystallite 、 Solvent effects 、 Solvatochromism
摘要: Synthetic solvent systems for the fine-tuned preparation of CdS nanocrystallites, active in visible-light photocatalytic hydrogen production, were studied. To control crystallite size and spectral properties, crystals synthesised by using different systems, containing a series tetrabutylammonium amino carboxylate ionic liquids as crystal-growth agents. Six samples CdS, all with similar physical exhibited greatly varying activity, most sample outperforming least one almost 60%. rationalise this effect, intermolecular interactions synthesis system growing nanocrystallites characterised Reichart betaine dye E(T)(N) polarity scale. A correlation was observed between values activity nanocrystallite, suggesting that hydrogen-bond-donating ability and/or dipolarity/polarisability led to preferential formation surfaces/surface sites on crystals.
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