期刊
ACS SENSORS
卷 3, 期 11, 页码 2446-2454出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.8b01023
关键词
surface-enhanced Raman scattering portable SERS detection; TiO2-Ag-GO; crystal violet; thiram; catalytic reaction monitoring; 3D nanopore array
资金
- National Natural Science Foundation of China [61205150]
- Project of Application Breeding Program of Hefei University of Technology [JZ2016YYPY0060]
- Youth Academic Team Capacity Promotion Program [PA2017GDQT0023]
- 111 Project New Materials and Technology for Clean Energy [B18018]
It is urgent to develop a rapid, reliable, and in-site determination method to detect or monitor trace amounts of toxic substances in the field. Here, we report an alternative surface-enhanced Raman scattering (SERS) method coupled with a portable Raman device on a plasmonic three-dimension (3D) hot spot sensing surface. Plasmonic Ag nanoparticles (AgNPs) were uniformly deposited on 3D TiO2 nanopore arrays as a sensitive SERS substrate, and further coated with graphene oxide (GO). We demonstrate the plasmon-induced SERS enhancement (5.8-fold) and the improvement of catalytic activity by incorporation of plasmonic AgNPs into the 3D TiO(2 )nanopore arrays. The modification of GO on the TiO2-Ag nanopore array further increases by a 6.2-fold Raman enhancement compared to TiO2-Ag while maintaining good uniformity (RSD < 10%). The optimized TiO2-Ag-GO substrate shows powerful quantitative detection potential for drug residues in fish scales via a simple scrubbing method, and the limit of detection (LOD) for crystal violet (CV) was 10(-8) M. The SERS substrate also showed detection practicability of pesticide residues in banana peel with an LOD of 10(-7) M. In addition, our TiO2-Ag-GO substrate exhibits excellent SERS self-monitoring performance for catalytic reduction of multiple organics in NaBH4 solution, and the substrate shows good recyclability of 6 cycles. Such a 3D TiO2-Ag-GO substrate is a promising SERS substrate with good sensitivity, uniformity, and reusability, and may be utilized for further miniaturization for point of analytical applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据