Ag-Au alloy nanoparticles: Synthesis and in situ monitoring SERS of plasmonic catalysis

SENSORS AND ACTUATORS B-CHEMICAL

卷:231

Article

Han, Qingyan¹  Zhang, Chengyun¹  Gao, Wei¹  Han, Zhihang¹  Liu, Tingzhuo¹  Li, Caixia¹  Wang, Zhaojin¹  He, Enjie¹  Zheng, Hairong¹ 

[1] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China

关键词: Au-Ag alloy nanoparticles;    Surface plasmon resonance;    Surface-enhanced Raman scattering;    Plasmonic catalysis;   

DOI  :  10.1016/j.snb.2016.03.068

来源: Elsevier

【 摘 要 】

Noble metal nanostructures are currently of great interest for their unique plasmonic property and potential applications in catalysis and surface-enhanced spectroscopy. However, the application of plasmonic nanostructures for quantitatively in situ SERS monitoring of the catalytic reaction has been a great challenge for investigators because combining plasmonics with catalysis requires the same kind of noble metal nanoparticles (NPs) in two very different size regimes. Herein, We have demonstrated a facile wet chemical method to synthesize Au-Ag alloy plasmonic NPs that could combine the desired plasmonic and catalytic properties with same NPs. The catalytic activity of Au-Ag alloy NPs using the reduction of 4-nitrothiophenol (4-NTP) by sodium borohydride (NaBH4) is chosen as a model reaction. The signals of the reaction processes are detected and identified through in situ SERS spectroscopy with high sensitivity. The insights gained by current study may serve as a promising and powerful technique for better investigation in the heterogeneous catalysis. Moreover, the reduction of aromatic nitro compounds with prepared Au-Ag alloy NPs also provides potential application in sewage treatment. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free