光催化
表面等离子共振
材料科学
纳米复合材料
可见光谱
降级(电信)
纳米技术
半导体
拉曼光谱
等离子体子
纳米颗粒
光化学
光电子学
化学工程
化学
光学
有机化学
催化作用
电信
物理
工程类
计算机科学
作者
Mei Liu,Xiaoxuan Hu,Can Zhang,Muhammad Shafi,Liqi Ma,Benfu Lv,Abdur Rahim,Muhammad Saleem,Lina Zhao
标识
DOI:10.1016/j.snb.2023.134688
摘要
The detection of pharmaceutical residues in the environment based on surface enhanced Raman spectroscopy (SERS) technology has become a popular tool due to its superior molecular specificity and high sensitivity. However, the practical applicability of semiconductor-based SERS sensors for trace pharmaceutical contaminants is limited due to their weak and unstable SERS performance. Herein, a donor-bridge-acceptor (D-B-A) system of MoO2 and ZnSe was fabricated to enhance the separation efficiency of electron-hole pairs in ZnSe and the charge transfer between MoO2 and ZnSe, which causes the MoO2/ZnSe nanocomposites to exhibit excellent SERS sensitivity and photocatalytic activity for the detection of multi-component contaminants and the antibiotic. The LOD of ciprofloxacin hydrochloride (CIP HCl) on MoO2/ZnSe nanocomposites is 8.30 × 10−8 M, and the degradation rate of CIP HCl is 80 % after visible light irradiation for 180 min. Our research effectively improves the SERS sensitivities and expands the practical SERS application of plasma-nonmetal/semiconductor composites, and avoids secondary contamination in the detection process. The enhancement mechanism of SERS and the interpretation of photocatalytic phenomena provide promising guidance for providing a low-cost and stable composite SERS platform in the detection and treatment of emerging contaminants.
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