Triplet-Triplet Annihilation Upconversion for Photocatalytic Hydrogen Evolution
Triplet-Triplet Annihilation Upconversion for Photocatalytic Hydrogen Evolution
复制标题
用于光催化析氢的三重态-三重态湮灭上转换
DOI：
10.1002/chem.201904025
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Li Yi
中科院分区：
文献类型：
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作者：
Yu Tianjun;Liu Yanpeng;Zeng Yi;Chen Jinping;Yang Guoqiang;Li Yi
太阳能分解水制氢为可再生制氢和太阳能储能提供了一条有前途的途径。低能光子向高能光子的上转换构成了提高人工制氢系统的光捕获效率的有前途的策略。在本研究中，上转换胶束与Cd0.5Zn0.5S集成构建太阳能转换系统。上转换胶束用于将红色光子上转换为青色光子。Cd0.5Zn0.5S被上转换的青色光敏化以产生氢，但在没有三重态-三重态湮灭上转换（TTA-UC）的情况下不能被入射红光敏化。Cd0.5Zn0.5S的浓度和光照强度对上转换光催化体系的性能有显著影响。这个新系统在红光（629 nm）照射（2.4 mW cm−2）5小时后能够产生约2.3μL氢气。 本研究为利用低能光子进行太阳能制氢的应用提供了候选者。
The solar generation of hydrogen by water splitting provides a promising path for renewable hydrogen production and solar energy storage. Upconversion of low‐energy photons into high‐energy photons constitutes a promising strategy to enhance the light harvesting efficiency of artificial hydrogen production systems. In the present study, upconversion micelles are integrated with Cd0.5Zn0.5S to construct solar energy conversion systems. The upconversion micelle is employed to upconvert red photons to cyan photons. Cd0.5Zn0.5S is sensitized by upconverted cyan light to produce hydrogen, but not by incident red light without triplet–triplet annihilation upconversion (TTA‐UC). The performance of the upconversion photocatalytic system was dramatically affected by the concentration of Cd0.5Zn0.5S and the irradiation intensity. This novel system was able to produce about 2.3 μL hydrogen after 5 h of red light (629 nm) irradiation (2.4 mW cm−2). The present study provides a candidate for applications using low‐energy photons for solar hydrogen generation.