State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China.
Phys Chem Chem Phys. 2013 Sep 21;15(35):14681-8. doi: 10.1039/c3cp52248b.
A novel near-infrared (NIR)-responsive photocatalyst, β-NaYF4:Yb(3+),Tm(3+)@ZnO composites, was prepared by a two-step high temperature thermolysis method. In the NIR-responsive photocatalysis, β-NaYF4:Yb,Tm served as a NIR-to-UV upconverter and provided "UV light" or "necessary energy" to the ZnO catalyst. The energy transfer in the composites and the mixtures of β-NaYF4:Yb,Tm and ZnO was studied by using steady-state and dynamic fluorescence spectroscopy. The NIR photocatalytic activities were investigated by the decomposition of Rhodamine B. It was found that the energy transfer processes dominated the overall photocatalytic activities, and the generation of hydroxyl radicals was the origin of organic pollutant decomposition under NIR irradiation.
一种新型的近红外（NIR）响应光催化剂，β-NaYF4:Yb(3+)，Tm(3+)@ZnO 复合材料，通过两步高温热解法制备。在 NIR 响应光催化中，β-NaYF4:Yb，Tm 充当 NIR 到 UV 的上转换体，并为 ZnO 催化剂提供“UV 光”或“必要的能量”。通过稳态和动态荧光光谱研究了复合材料和β-NaYF4:Yb，Tm 和 ZnO 混合物中的能量转移。通过罗丹明 B 的分解研究了 NIR 光催化活性。结果发现，能量转移过程主导了整体光催化活性，并且在 NIR 照射下，羟基自由基的产生是有机污染物分解的起源。
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