Photosensitization of TiO2 Nanostructures with CdS Quantum Dots: Particulate versus Tubular Support Architectures
Photosensitization of TiO2 Nanostructures with CdS Quantum Dots: Particulate versus Tubular Support Architectures
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DOI：
10.1002/adfm.200801173
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发表时间：
2009-03-10
影响因子：
19
通讯作者：
Kamat, Prashant V.
中科院分区：
文献类型：
--
作者：
Baker, David R.;Kamat, Prashant V.
二氧化钛纳米管阵列和颗粒膜与CdS量子点进行了修改，目的是调整在可见光区的光电化学电池的响应。连续离子层吸附和反应的方法有利于CdS量子点的尺寸控制。这些CdS纳米晶体在可见光激发下，将电子注入到TiO 2纳米管和颗粒中，从而使其能够用作光敏电极。对于CdS敏化的TiO 2纳米管和纳米颗粒结构，观察到的最大入射光子与电荷载流子效率（IPCE）值分别为55%和26%。用TiO 2纳米管结构观察到的IPCE几乎加倍，这归因于电荷分离和电子传输效率的提高。
TiO2 nanotube arrays and particulate films are modified with CdS quantum dots with an aim to tune the response of the photoelectrochemical cell in the visible region. The method of successive ionic layer adsorption and reaction facilitates size control of CdS quantum dots. These CdS nanocrystals, upon excitation with visible light, Inject electrons into the TiO2 nanotubes and particles and thus enable their use as photosensitive electrocdes. Maximum incident photon to charge carrier efficiency (IPCE) values of 55% and 26% are observed for CdS sensitized TiO2 nanotube and nanoparticulate architectures respectively. The nearly doubling of IPCE observed with the TiO2 nanotube architecture is attributed to the increased efficiency of charge separation and transport of electrons.