Liang Aihui, Li Xin, Zhang Xinghui, Wen Guiqing, Jiang Zhiliang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, China.
Luminescence. 2018 Sep;33(6):1033-1039. doi: 10.1002/bio.3504. Epub 2018 Jun 13.
The nanogold reaction between HAuCl and trisodium citrate (TCA) proceeded very slowly at 60°C in a water bath. The as-prepared graphene oxide nanoribbons (GONRs) exhibited strong catalysis during the reaction to form gold nanoparticles (Au NPs) and appeared as a strong surface-enhanced Raman scattering (SERS) peak at 1616 cm in the presence of the molecular probe Victoria blue 4R (VB4r). With increase in GONR concentration, the SERS peak increased due to increased formation of Au NPs. Upon addition of dimethylglyoxime (DMG) ligand, which was adsorbed onto the GONR surface to inhibit GONR catalysis, the SERS peak decreased. When Ni was added, a coordination reaction between DMG and Ni took place to form stable complexes of [Ni (DMG) ] and the release of free GONR catalyst that resulted in the SERS peak increasing linearly. A SERS quantitative analysis method for Ni was therefore established, with a linear range of 0.07-2.8 μM, and a detection limit of 0.036 μM Ni .
在60°C水浴中，氯金酸（HAuCl）与柠檬酸钠（TCA）之间的纳米金反应进行得非常缓慢。所制备的氧化石墨烯纳米带（GONRs）在反应过程中对形成金纳米颗粒（Au NPs）表现出强烈的催化作用，并且在存在分子探针维多利亚蓝4R（VB4r）的情况下，在1616 cm处出现强烈的表面增强拉曼散射（SERS）峰。随着GONR浓度的增加，由于Au NPs形成增加，SERS峰增强。加入吸附在GONR表面以抑制GONR催化的二甲基乙二肟（DMG）配体后，SERS峰降低。加入镍时，DMG与镍发生配位反应形成稳定的[Ni (DMG) ]配合物，游离的GONR催化剂释放出来，导致SERS峰线性增加。因此建立了一种镍的SERS定量分析方法，线性范围为0.07 - 2.8 μM，镍的检测限为0.036 μM。
