Yao Dongmei, Wen Guiqing, Gong Lingbo, Li Chongning, Liang Aihui, Jiang Zhiliang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China.
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, 541004 Guilin, China.
Nanomaterials (Basel). 2020 Mar 2;10(3):450. doi: 10.3390/nano10030450.
Carbon monoxide (CO) is a commonly poisonous gas. It is important to detect CO in daily life. Herein, a new and sensitive surface enhanced Raman scattering (SERS) and resonance Rayleigh scattering (RRS) coupled di-mode method was developed for CO, based on gold nano-enzyme catalysis and gold nanoprobes. CO can react with HAuCl to generate gold nanoparticles (AuNPs) in pH 5.2 HAc-NaAc buffer. The generated AuNPs exhibited SERS activity at 1620 cm in the presence of Vitoria blue B (VBB) molecular probes, and an RRS peak at 290 nm. Based on the AuNP bifunctional probes, the increased SERS and RRS intensities respond linearly with the concentration of CO in the range of 100-1500 ng/mL and 30-5230 ng/mL, respectively. To improve the sensitivity, the produced AuNPs were used as nano-enzyme catalysts for the new indicator reaction of HAuCl-ethanol (En) to amplify the signal. The sensitive SERS method was coupled with the accurate RRS method to develop a sensitive and accurate SERS/RRS di-mode method for determination of 3.0-413 ng/mL CO, based on the AuNP-HAuCl-En nanocatalytic reaction and its product of AuNPs as SERS and RRS bifunctional probes.
一氧化碳（CO）是一种常见的有毒气体。在日常生活中检测CO很重要。在此，基于金纳米酶催化和金纳米探针，开发了一种用于检测CO的新型灵敏的表面增强拉曼散射（SERS）与共振瑞利散射（RRS）耦合双模式方法。在pH 5.2的HAc-NaAc缓冲液中，CO可与氯金酸（HAuCl）反应生成金纳米颗粒（AuNPs）。在维多利亚蓝B（VBB）分子探针存在下，生成的AuNPs在1620 cm处表现出SERS活性，并在290 nm处出现一个RRS峰。基于AuNP双功能探针，SERS和RRS强度的增加分别在100 - 1500 ng/mL和30 - 5230 ng/mL范围内与CO浓度呈线性响应。为提高灵敏度，将生成的AuNPs用作氯金酸 - 乙醇（En）新指示反应的纳米酶催化剂以放大信号。基于AuNP - HAuCl - En纳米催化反应及其产物AuNPs作为SERS和RRS双功能探针，将灵敏的SERS方法与准确的RRS方法相结合，开发出一种灵敏准确的SERS/RRS双模式方法用于测定3.0 - 413 ng/mL的CO。
