Fu Li, Zhu Deming, Yu Aimin
Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia.
Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia; Department of Chemistry, Hubei Normal University, 435002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Oct 5;149:396-401. doi: 10.1016/j.saa.2015.04.049. Epub 2015 Apr 24.
A simple method was developed to synthesize Ag dendrites/reduced graphene oxide (AgD/RGO) composites based on the galvanic displacement method. AgNO3 was used as the precursor for Ag dendrites and aluminum foils served as the sacrifice metal. The as-synthesized AgD/RGO composite was characterized by SEM, FTIR, UV-vis spectroscopy and Raman spectroscopy. The results showed that the graphene oxide was successfully incorporated into the Ag dendritic structure and was reduced during the galvanic displacement between Ag(+) ions and the aluminum foil. XRD analysis revealed that the Ag formed in the composite was in the cubic phase. The surface-enhanced Raman scattering (SERS) property of the as synthesized AgD/RGO composite was evaluated using Rhodamine B as a probe. The composite deposited substrate exhibited a much higher SERS activity compared with substrates modified with Ag dendrites or GO, indicating that the AgD/RGO could potentially be used as a highly sensitive SERS substrate for molecule detecting applications.
基于电置换法开发了一种合成银树枝状/还原氧化石墨烯（AgD/RGO）复合材料的简单方法。硝酸银用作银树枝状晶体的前驱体，铝箔用作牺牲金属。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、紫外可见光谱和拉曼光谱对合成的AgD/RGO复合材料进行了表征。结果表明，氧化石墨烯成功地掺入到银树枝状结构中，并在银离子与铝箔之间的电置换过程中被还原。X射线衍射（XRD）分析表明，复合材料中形成的银为立方相。以罗丹明B为探针评估了合成的AgD/RGO复合材料的表面增强拉曼散射（SERS）性能。与用银树枝状晶体或氧化石墨烯修饰的基底相比，复合沉积基底表现出更高的SERS活性，表明AgD/RGO有可能用作分子检测应用的高灵敏度SERS基底。
