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Visible light-induced charge retention and photocatalysis with hybrid CdSe-Au nanodumbbells

机译：可见光诱导的电荷保留和杂化CdSe-Au纳米哑铃的光催化

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摘要

Visible light photocatalysis is a promising route for harnessing of solar energy to perform useful chemical reactions and to convert light to chemical energy. Nanoscale photocatalytic systems used to date were based mostly on oxide semiconductors aided by metal deposition and were operational only under UV illumination. Additionally, the degree of control over particle size and shape was limited. We report visible light photocatalysis using highly controlled hybrid gold-tipped CdSe nanorods (nanodumbbells). Under visible light irradiation, charge separation takes place between the semiconductor and metal parts of the hybrid particles. The charge-separated state Was then utilized for direct photoreduction of a model acceptor molecule, methylene blue, or alternatively, retained for later use to perform the reduction reaction in the dark.
机译：可见光光催化是利用太阳能进行有用的化学反应并将光转换为化学能的一种有前途的途径。迄今为止使用的纳米级光催化系统主要基于借助金属沉积的氧化物半导体，并且只能在紫外线照射下运行。另外，对粒度和形状的控制程度受到限制。我们报告使用高度受控的杂化金的CdSe纳米棒（nanodumbbells）可见光光催化。在可见光照射下，杂化颗粒的半导体和金属部分之间发生电荷分离。然后将电荷分离状态用于模型受体分子亚甲基蓝的直接光还原，或保留下来供以后用于在黑暗中进行还原反应。

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