Wang Xiaohua, Zhang Chengyun, Zhou Xilin, Fu Zhengkun, Yan Lei, Li Jinping, Zhang Zhenglong, Zheng Hairong
School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.
School of Electronic Engineering, Xi'an University of Posts & Telecommunications, Xi'an 710121, China.
Nanomaterials (Basel). 2022 Aug 25;12(17):2927. doi: 10.3390/nano12172927.
Noble metal nanostructures can produce the surface plasmon resonance under appropriate photoexcitation, which can be used to promote or facilitate chemical reactions, as well as photocatalytic materials, due to their strong plasmon resonance in the visible light region. In the current work, Ag/Au nanoislands (NIs) and Ag NIs/Au film composite systems were designed, and their thermocatalysis performance was investigated using luminescence of Eu as a probe. Compared with Ag NIs, the catalytic efficiency and stability of surface plasmons of Ag/Au NIs and Ag NIs/Au film composite systems were greatly improved. It was found that the metal NIs can also generate strong localized heat at low temperature environment, enabling the transition of NaYF:Eu to YO: Eu, and anti-oxidation was realized by depositing gold on the surface of silver, resulting in the relative stability of the constructed complex.
贵金属纳米结构在适当的光激发下可产生表面等离子体共振，由于其在可见光区域具有强烈的等离子体共振，可用于促进化学反应，以及作为光催化材料。在当前工作中，设计了Ag/Au纳米岛（NIs）和Ag NIs/Au薄膜复合体系，并以Eu的发光为探针研究了它们的热催化性能。与Ag NIs相比，Ag/Au NIs和Ag NIs/Au薄膜复合体系表面等离子体的催化效率和稳定性得到了极大提高。研究发现，金属NIs在低温环境下也能产生强烈的局部热，使NaYF:Eu转变为YO:Eu，通过在银表面沉积金实现了抗氧化，从而使构建的复合物具有相对稳定性。
