液相剥离自组装法制备AgNPs/MoS_(2)复合SERS基底及其性能  

Preparation and Performance of AgNPs/MoS_(2)Composite SERS Substrate via Liquid Phase Exfoliation

作　　者：周丹 刘一鸣 王志刚 银建中[2] 徐琴琴[2] ZHOU Dan;LIU Yiming;WANG Zhigang;YIN Jianzhong;XU Qinqin(School of Chemical Engineering and Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]太原科技大学化学工程与技术学院,太原030024 [2]大连理工大学化工学院,辽宁大连116024

出　　处：《材料导报》2024年第16期68-74,共7页Materials Reports

基　　金：国家重点研发计划(2020YFA0710202);国家自然科学基金(U1662130);山西省基础研究计划青年项目(202203021212300);太原科技大学博士启动基金(20212064)。

摘　　要：二维纳米材料因其原子级厚度、可调的带隙以及高比表面积等特点,在表面增强拉曼散射(SERS)领域展现出巨大的应用潜力。当二维材料与金属纳米颗粒结合时,其SERS性能显著增强。本工作提出一种简便的复合基底制备方法,结合银纳米颗粒(AgNPs)优异的导电性能,良好的透光性和弯曲柔韧性,采用天然二硫化钼粉末作为原料,通过一步法实现二维材料直接液相剥离与AgNPs原位合成。通过单因素分析法确定硝酸银与二硫化钼的质量比、机械搅拌转速、超声时间的影响范围,再利用响应面分析法设计优化实验条件。当硝酸银和二硫化钼的质量比为5∶1、机械搅拌转速为1000 r/min、超声时间为3 h时,所制备的SERS基底在检测低浓度孔雀石绿时表现出高的灵敏度和良好的线性关系,增强因子达到四个数量级。Two-dimensional nanomaterials have demonstrated significant application potential in the field of surface-enhanced Raman scattering(SERS)because of their atomic thickness,tunable band gap,and high specific surface area.Metal nanoparticles can be added tO_(2)D materials to greatly improve their SERS performance.This work presents a straightforward preparation process for composite materials made of AgNPs and MoS 2,combining the advantages of AgNPs’strong conductivity,good light transmittance,and bending flexibility,the method utilizes natural molybdenum disulfide powder to achieve one-step liquid-phase exfoliation and in-situ synthesis of AgNPs.The single factor analysis method was used to determine the influence range of the mass ratio of silver nitrate to molybdenum disulfide,mechanical stirring speed,and ultrasonic duration,and then the response surface analysis method was used to design and optimize the experimental conditions.When the mass ratio of silver nitrate to molybdenum disulfide is 5∶1,the mechanical stirring speed is 1000 r/min,and the ultrasonic duration is 3 h,the prepared SERS substrate shows high sensitivity and good linear relationship when detecting low concentrations of malachite green,the enhancement factor reaches 4 orders of magnitude.

关 键 词：表面增强拉曼散射光谱 二硫化钼 基底 孔雀石绿 

分 类 号：TB34[一般工业技术—材料科学与工程] TB333