期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 282, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2022.121646
关键词
SERS; Anthraquinone dyes; Silver colloid; Sensitivity; Reproducibility
类别
资金
- National Natural Science Foundation of China [32122068, 22138011]
- Na-tional Key R&D Program of China [2019YFC1520300, 2020YFC1712700]
This paper presents a strategy based on surface-enhanced Raman scattering (SERS) using a novel silver colloid substrate for the detection of anthraquinone dyes. The silver colloid substrates prepared by solvothermal method showed high-density hot spots with good reproducibility and high sensitivity for detecting anthraquinone dyes.
Anthraquinone dyes have been widely used to color textile fibers since antiquity. Identification of the dyes can help us understand the dyeing processes and when and where the textiles were produced. Herein, we present a strategy based on surface-enhanced Raman scattering (SERS) with a novel silver colloid substrate for the detection of anthraquinone dyes. Quasi-spherical silver particles with different sizes were prepared by the solvothermal method and then characterized by transmission electron microscopy (TEM). The silver colloid substrates exhibited high-density hot spots with good reproducibility (RSDs of 3 similar to 16 %) and high sensitivity. Among them, Ag-C2 (the molar ratio of AgNO3 to PVP is 0.367, reacted for 2 h) was used to detect anthraquinone dyes in reference silk fibers as well as ancient textile samples due to the highest sensitivity and the low RSD (5.37 %) in this study. More importantly, Ag-C2 can be utilized to distinguish three madder species (Rabat tinctorum, Rubia cordifolia, and Rubia argyi) depending on the SERS intensity of alizarin and purpurin.
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