Trace Cd2+ Ions Detection on the Flower-Like Ag@CuO Substrate

• Published in: Nanomaterials (Basel, Switzerland) Vol. 10; no. 9; p. 1664
• Main Authors: Cheng, Mingming, Li, Chenyan, Li, Weijun, Liu, Yingkai
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 25.08.2020; MDPI
• Subjects: Ag@CuO FM; Cadmium; cadmium ion; Copper oxides; Deoxyribonucleic acid; DNA; Drinking water; Environmental protection; Ions; Metals; Microscopy; Nanomaterials; Nanoparticles; Nitrates; Nuclear power plants; Raman spectra; Rhodamine 6G; Scientific imaging; Silicon wafers; Silver; Soil water; Substrates; surface enhanced raman scattering; United States > US; China; Japan
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano10091664

CuO flower-like material (FM) was prepared via the facile hydrothermal method, and Ag nanoparticles were deposited on the CuO FM to obtain Ag@CuO composite. Rhodamine 6G (R6G) was used as the probe molecule on Ag@CuO FM substrate to study surface enhanced Raman scattering (SERS). It is discovered that it exhibited an excellent SERS performance with limit of detection of 3.58 × 10−16 M and enhancement factor (EF) of 3.99 × 1010. More importantly, we used it as a SERS substrate to detect cadmium ions and found that its limit of detection (LOD) reaches up to 2.6 × 10−8 M, which is lower than the highest allowable Cd2+ concentration in drinking water set by the World Health Organization (WHO) and Environmental Protection Agency (EPA). Therefore, the proposed composite can be applicable to the detection of Cd2+ in drinking water and in soil.