Viewpoint: Challenges in Colloidal Photocatalysis and Some Strategies for Addressing Them
Viewpoint: Challenges in Colloidal Photocatalysis and Some Strategies for Addressing Them
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DOI：
10.1021/acs.inorgchem.7b03182
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发表时间：
2018-04-02
影响因子：
4.6
通讯作者：
Weiss, Emily A.
中科院分区：
文献类型：
--
作者：
Kodaimati, Mohamad S.;McClelland, Kevin P.;Weiss, Emily A.
胶体半导体纳米晶体，或“量子点”（QD），有几个光学和化学性质，使他们的潜力，使非增量增加的效率，许多类型的光催化反应相关的能量转换和有机合成。胶体光催化剂具有多相和均相催化剂的许多理想特性，但也有其自身的一系列特殊挑战。这种观点概述了一些障碍，一个第一次遇到的驱动与这些胶体反应时，并提供了一些克服这些障碍的策略，包括延长其激发态寿命的方法，防止腐蚀的光生空穴，并选择一个表面化学和缓冲系统的最大胶体稳定性在一系列的环境条件。
Colloidal semiconductor nanocrystals, or "quantum dots" (QDs), have several optical and chemical properties that give them the potential to enable nonincremental increases in the efficiencies of many types of photocatalytic reactions relevant for energy conversion and organic synthesis. Colloidal photocatalysts have many desirable characteristics of both heterogeneous and homogeneous catalysts but come with their own particular set of challenges. This viewpoint outlines some of the obstacles one first encounters when driving reactions with these colloids and offers some strategies for overcoming these obstades, including ways to extend their excited state lifetimes, prevent corrosion by photogenerated holes, and choose a surface chemistry and buffering system for maximum colloidal stability over a range of environmental conditions.