Detection of High Molecular Weight Polycyclic Aromatic Hydrocarbons in Mixed Colloid Solution of Spherical Au and Urchin-Like Au-Ag Alloy with Surface-Enhanced Raman Scattering
SHI Xiao-feng, MENG Chen, MA Li-zhen, MA Hai-kuan, ZHANG Xin-min, MA Jun*
Optics & Optoeletronics Laboratory, Ocean University of China, Qingdao 266100, China
Abstract：In this paper, Au nanosphere and Au-Ag alloy nanourchin were prepared by reducing the chloroauric acid. The mixed colloid solutions of Au nanosphere and Au-Ag alloy nanourchin were used as surface-enhanced Raman scattering (SERS) substrate to detect polycyclic aromatic hydrocarbons (PAHs) in aqueous solution. The size of Au-Ag alloy nanourchin particle was about 300~400 nm and the thorn-like bulge covered on it was about 40~100 nm. The mixed colloid solutions of Au nanosphere and Au-Ag alloy nanourchin which were optimized pH values and other parameters presented a better enhancement than Au nanosphere. The enhancement effect was about three times that of Au nanosphere colloid solution. Three kinds of high molecular weight PAHs, pyrene(4 rings), benzoanthracene(4 rings) and benzo[a]pyrene(5 rings), were detected. The results showed that there were good linear relationships between Raman intensity and concentration in the low concentration range and the mixed SERS substrate had a good reproducibility and stability. Their limits of detection (LODs) were 0.44, 2.92 and 1.64 nmol·L-1, respectively. The innovation of this paper was that the mixed colloid solutions of Au nanosphere and Au-Ag alloy nanourchin are prepared as SERS substrate and the trace-level high molecular weight PAHs are detected. The results show that the detection of trace-level high molecular weight PAHs in aqueous can be realized using the mixed SERS substrate prepared in this study, which proposed an in-situ method for detecting the high molecular weight PAHs in aqueous.
史晓凤，孟 辰，马丽珍，马海宽，张心敏，马 君* . 应用球形和海胆状金混合SERS基底检测高环多环芳烃 [J]. 光谱学与光谱分析, 2016, 36(07): 2128-2133.
SHI Xiao-feng, MENG Chen, MA Li-zhen, MA Hai-kuan, ZHANG Xin-min, MA Jun* . Detection of High Molecular Weight Polycyclic Aromatic Hydrocarbons in Mixed Colloid Solution of Spherical Au and Urchin-Like Au-Ag Alloy with Surface-Enhanced Raman Scattering . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(07): 2128-2133.
[1] Xie Yunfei, Wang Xu, Han Xiaoxia, et al. J. Raman Spectrosc., 2011, 42(5): 945. [2] Kneipp J, Kneipp H, Kneipp K. Chemical Society Reviews, 2008, 37(5): 1052. [3] Qu Lulu, Yuan Tingli, Li Dawei, et al. Analyst, 2013, 138(5): 1253. [4] Tian C, Liu Z, Jin J, et al. Nanotechnology, 2012, 23(16): 165604. [5] Shi Xiaofeng, Liu Shu, Han Xiaohong, et al. Applied spectroscopy, 2015, 69(5): 574. [6] Frens G. Nature. Phys. Sci.，1973, 241(1): 20. [7] Liu Z, Yang Z, Peng B, et al. Advanced Materials, 2014, 26(15): 2431. [8] Shinohara H, Yamakita Y, Ohno K. Journal of Molecular Structure, 1998, 442(1): 221. [9] Frank O, Jehlika J, Edwards H G M. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2007, 68(4): 1065. [10] Maddams W F, Royaud I A M. SpectrochimicaActa Part A: Molecular Spectroscopy, 1990, 46(2): 309. [11] Chiang H P, Mou B, Li K P, et al. Journal of Raman Spectroscopy, 2001, 32(1): 45. [12] FENG Ai, DUAN Jin-ming, DU Jing-jing, et al(冯 艾, 段晋明, 杜晶晶，等). Environmental Chemistry(环境化学), 2014, 33(1): 46. [13] DONG Xiao-yan, FANG Jing-huai, YANG Heng-jing, et al(董小燕, 方靖淮, 杨衡静，等). Jiangxi Science(江西科学), 2005, 23(5): 538.
