Guo Shuang, Wang Yaxin, Zhang Fan, Gao Renxian, Liu Maomao, Dong Lirong, Liu Yang, Zhang Yongjun, Chen Lei
College of Physics, Jilin Normal University, Siping 136000, China.
Key Laboratory of Functional Materials Physics and Chemistry, Ministry of Education, Jilin Normal University, Changchun 130103, China.
Nanomaterials (Basel). 2018 Jun 17;8(6):444. doi: 10.3390/nano8060444.
Emerging opportunities based on two-dimensional (2D) layered structures can utilize a variety of complex geometric architectures. Herein, we report the synthesis and properties of a 2D+0D unique ternary platform-core-shell nanostructure, termed Ag@Cu₂O-rGO, where the reduced graphene oxide (rGO) 2D acting as a platform is uniformly decorated by Ag@Cu₂O core-shell nanoparticles. Cu₂O nanoparticles occupy the defect positions on the surface of the rGO platform and restore the conjugation of the rGO structure, which contributes to the significant decrease of the / intensity ratio. The rGO platform can not only bridge the isolated nanoparticles together but also can quickly transfer the free electrons arising from the Ag core to the Cu₂O shell to improve the utilization efficiency of photogenerated electrons, as is verified by high efficient photocatalytic activity of Methyl Orange (MO). The multi-interface coupling of the Ag@Cu₂O-rGO platform-core-shell nanostructure leads to the decrease of the bandgap with an increase of the Cu₂O shell thickness, which broadens the absorption range of the visible light spectrum.
基于二维（2D）层状结构的新兴机遇能够利用各种复杂的几何结构。在此，我们报告了一种2D + 0D独特的三元平台 - 核壳纳米结构Ag@Cu₂O - rGO的合成及性质，其中作为平台的二维还原氧化石墨烯（rGO）被Ag@Cu₂O核壳纳米颗粒均匀修饰。Cu₂O纳米颗粒占据rGO平台表面的缺陷位置并恢复rGO结构的共轭，这有助于显著降低/强度比。rGO平台不仅可以将孤立的纳米颗粒连接在一起，还能够将源自Ag核的自由电子快速转移到Cu₂O壳层，以提高光生电子的利用效率，甲基橙（MO）的高效光催化活性证实了这一点。Ag@Cu₂O - rGO平台 - 核壳纳米结构的多界面耦合导致带隙随着Cu₂O壳层厚度的增加而减小，从而拓宽了可见光谱的吸收范围。
