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Copper foam in situ loaded with precious metal nanoparticles as transmission SEIRAS substrate for rapid detection of dithiocarbamate pesticides.
Analytical Methods ( IF 2.7 ) Pub Date : 2020-06-29 , DOI: 10.1039/d0ay01044h Xincheng Jiang 1 , Wen Liu , Bin Luo , Xuke Liu , Yuting Huang , Dongmei Wang , Meikun Fan , Zhengjun Gong
Analytical Methods ( IF 2.7 ) Pub Date : 2020-06-29 , DOI: 10.1039/d0ay01044h Xincheng Jiang 1 , Wen Liu , Bin Luo , Xuke Liu , Yuting Huang , Dongmei Wang , Meikun Fan , Zhengjun Gong
Affiliation
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A transmission surface-enhanced infrared absorption spectroscopy (SEIRAS) substrate based on copper foam (CF) was developed for the rapid detection of dithiocarbamate (DTC) pesticides. The transmission SEIRAS substrate was prepared by immersing CF in a mixed solution of a precious metal solution and a polyvinyl pyrrolidone (PVP) solution. Then CF could be in situ loaded with precious metal nanoparticles (MNPs) by PVP-modified displacement reaction in seconds. PVP could be helpful for the uniform distribution of MNPs. Experimental parameters were evaluated with 11-mercaptoundecanoic acid (MUA) as a probe molecule, including the concentration of the precious metal solution, the amount of PVP, and the reaction time. Taking CF loaded with gold nanoparticles (Au NPs-CF) as an example, the signal intensity of DTC pesticide (Ziram) could be enhanced by two orders of magnitude, and the R2 of the calibration curve was 0.999. In addition, the Pt NPs-CF substrate was applied to the rapid detection of other DTC pesticides (Ferbam). In summary, we have developed a new method to prepare the transmission SEIRAS substrate and apply it to the rapid detection of DTC pesticides in liquid.
中文翻译：
原位负载贵金属纳米粒子的泡沫铜作为传输SEIRAS底物，用于快速检测二硫代氨基甲酸酯农药。
开发了一种基于泡沫铜（CF）的透射表面增强红外吸收光谱（SEIRAS）基质，用于快速检测二硫代氨基甲酸酯（DTC）农药。通过将CF浸入贵金属溶液和聚乙烯吡咯烷酮（PVP）溶液的混合溶液中来制备透射SEIRAS基板。然后CF可以就地通过PVP修饰的置换反应在几秒钟内即可装载贵金属纳米颗粒（MNP）。PVP有助于MNP的均匀分布。以11-巯基十一酸（MUA）作为探针分子评估了实验参数，包括贵金属溶液的浓度，PVP的量和反应时间。以负载金纳米颗粒（Au NPs-CF）的CF为例，DTC农药（Ziram）的信号强度可以提高两个数量级，R 2校正曲线的值为0.999。此外，Pt NPs-CF底物还用于其他DTC农药（Ferbam）的快速检测。总之，我们已经开发出一种新的方法来制备透射SEIRAS底物，并将其应用于液体中DTC农药的快速检测。
更新日期：2020-07-23
中文翻译：
原位负载贵金属纳米粒子的泡沫铜作为传输SEIRAS底物，用于快速检测二硫代氨基甲酸酯农药。
开发了一种基于泡沫铜（CF）的透射表面增强红外吸收光谱（SEIRAS）基质，用于快速检测二硫代氨基甲酸酯（DTC）农药。通过将CF浸入贵金属溶液和聚乙烯吡咯烷酮（PVP）溶液的混合溶液中来制备透射SEIRAS基板。然后CF可以就地通过PVP修饰的置换反应在几秒钟内即可装载贵金属纳米颗粒（MNP）。PVP有助于MNP的均匀分布。以11-巯基十一酸（MUA）作为探针分子评估了实验参数，包括贵金属溶液的浓度，PVP的量和反应时间。以负载金纳米颗粒（Au NPs-CF）的CF为例，DTC农药（Ziram）的信号强度可以提高两个数量级，R 2校正曲线的值为0.999。此外，Pt NPs-CF底物还用于其他DTC农药（Ferbam）的快速检测。总之，我们已经开发出一种新的方法来制备透射SEIRAS底物，并将其应用于液体中DTC农药的快速检测。
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