Ji Peng, Mao Zhu, Wang Zhe, Xue Xiangxin, Zhang Yu, Lv Jiaao, Shi Xiumin
College of Chemical Engineering, Changchun University of Technology, Changchun 130012, China.
School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, China.
Nanomaterials (Basel). 2019 Jul 6;9(7):983. doi: 10.3390/nano9070983.
In this study, ZrO and Zn-ZrO nanoparticles (NPs) with a series of Zn ion doping amounts were synthesized by the sol-gel process and utilized as substrates for surface-enhanced Raman scattering (SERS). After absorbing the probing molecule 4-mercaptobenzoic acid, the SERS signal intensities of Zn-ZrO NPs were all greater than that of the pure ZrO. The 1% Zn doping concentration ZrO NPs exhibited the highest SERS enhancement, with an enhancement factor (EF) value of up to 10. X-ray diffraction, X-ray photoelectron spectroscopy, Ultraviolet (UV) photoelectron spectrometer, UV-vis spectroscopy, Transmission Electron Microscope (TEM), and Raman spectroscopy were used to characterize the properties of Zn-ZrO NPs and explore the mechanisms behind the SERS phenomenon. The charge transfer (CT) process is considered to be responsible for the SERS performance of 4-MBA adsorbed on Zn-ZrO. The results of this study demonstrate that an appropriate doping ratio of Zn ions can promote the charge transfer process between ZrO NPs and probe molecules and significantly improve the SERS properties of ZrO substrates.
在本研究中，通过溶胶 - 凝胶法合成了具有一系列锌离子掺杂量的ZrO和Zn-ZrO纳米颗粒（NPs），并将其用作表面增强拉曼散射（SERS）的基底。在吸附探测分子4-巯基苯甲酸后，Zn-ZrO NPs的SERS信号强度均大于纯ZrO的信号强度。1%锌掺杂浓度的ZrO NPs表现出最高的SERS增强效果，增强因子（EF）值高达10。利用X射线衍射、X射线光电子能谱、紫外（UV）光电子能谱仪、紫外可见光谱、透射电子显微镜（TEM）和拉曼光谱对Zn-ZrO NPs的性质进行了表征，并探究了SERS现象背后的机制。电荷转移（CT）过程被认为是吸附在Zn-ZrO上的4-MBA的SERS性能的原因。本研究结果表明，适当的锌离子掺杂比例可以促进ZrO NPs与探测分子之间的电荷转移过程，并显著改善ZrO基底的SERS性能。
Zotero 插件
