| 微波原位合成Ag NPs/MoS2复合材料及其电化学性能 | |
| In situ synthesis of Ag NPs/MoS2 composites via microwave and their electrochemical properties | |
| 摘要: 二硫化钼纳米片(MoS2)受到带电杂质、结构缺陷和易聚集等因素的影响，导致其电子转移性能下降，使其应用受限。将银纳米颗粒(Ag NPs)与少层MoS2纳米片复合，可提升MoS2纳米片的电化学性能。本研究创新性地采用微波还原法，使Ag NPs原位沉积于MoS2，得到Ag NPs/MoS2复合材料。结果表明，将Ag NPs/MoS2复合材料修饰于丝网印刷电极(screen printed electrodes，SPE)后，测得的循环伏安(cyclic voltammetry，CV)曲线峰电流值为同浓度单一MoS2修饰电极的1.8倍，方波伏安(squarewave voltammetry，SWV)曲线峰电流值为单一MoS2修饰电极的3.4倍，电化学阻抗谱(electrochemical impedance spectroscopy，EIS)的电子转移阻抗值(Ret)仅为167 Ω，相比MoS2/SPE的Ret (320 Ω)显著减小，说明Ag NPs与MoS2复合可显著增强单一MoS2的电化学性能。此外，还推测了高导电性Ag NPs/MoS2复合材料的导电机理。最后，基于Ag NPs/MoS2复合材料构建了电化学传感器并对前列腺特异性抗原(PSA)进行检测。结果表明，该传感器针对PSA的检测限为0.009 ng·mL-1，线性检测范围为0.1~1 000 ng·mL-1，灵敏度为0.011 μA·mL·ng-1。 | |
| 关键词: 微波原位合成 MoS2 Ag NPs/MoS2复合材料 电化学性能 | |
| 基金项目: 国家自然科学基金(No.61971049，62211530446)、北京印刷学院科研创新团队项目(No.20190122044)、北京印刷学院材料科学与工程学科建设项目(No.21090122014，21090123007)资助。 | |
| Abstract: Molybdenum disulfide nanosheets (MoS2) are affected by charged impurities, structural defects and traps, and their easy aggregation leads to the deterioration of their electron transfer performance, which limits their application. In this study, Ag NPs/MoS2 composites were prepared by combining a few layers of MoS2 nanosheets with silver nanoparticles (Ag NPs), in order to improve the electrochemical performance of MoS2 nanosheets. Firstly, the low-layer MoS2 nanosheets were prepared by ultrasonic assisted liquid phase stripping method, and then the Ag NPs/MoS2 composites were prepared by microwave reduction method. After Ag NPs/MoS2 composites were modified onto screen printed electrodes (SPE), the peak current of cyclic voltammetry (CV) curve was 1.8 times of that of MoS2 modified SPE, and the peak current of square wave voltammetry (SWV) curve was 3.4 times of that of MoS2 modified SPE. The electron transfer impedance (Ret) of electrochemical impedance spectroscopy (EIS) was only 167 Ω, which was significantly lower than that of MoS2/SPE (320 Ω), indicating that compared to that of MoS2 nanosheets, the electrochemical performance of Ag NPs/MoS2 composites is significantly enhanced. Subsequently, the conductive mechanism of the highly conductive Ag NPs/MoS2 composites was also speculated. Finally, an electrochemical sensor was constructed based on Ag NPs/MoS2 composites and used for the detection of prostate specific antigen (PSA). The results showed that the detection limit of the sensor for PSA was 0.009 ng·mL-1, the linear detection range was 0.1~ 1 000 ng·mL-1, and the sensitivity was 0.011 μA·mL·ng-1. | |
| Keywords: in situ synthesis via microwave MoS2 Ag NPs/MoS2 composites electrochemical performance | |
| 投稿时间：2023-05-03 修订日期：2023-08-28 | |
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| 杨松松,韩璐,蔡和庆,胡堃,刘儒平,孙志成,危岩.微波原位合成Ag NPs/MoS2复合材料及其电化学性能[J].无机化学学报,2023,39(10):1848-1856. | |
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