研究目的
Developing an effective and reliable method for trace arsenic (As) detection to improve the safety of drinking water.
研究成果
Ag@Fe3O4 core–shell NPs are highly sensitive, stable, reproducible, and recyclable for SERS detection of As(V), with a detection limit as low as 10 (cid:2)g/L and a linear response for concentrations up to 500 (cid:2)g/L. The NPs can be regenerated and reused, offering a potential solution for field assays of trace As in groundwater.
研究不足
The study focuses on As(V) detection and may not be directly applicable to other forms of arsenic or other heavy metals without further modification of the SERS probes.
1：Experimental Design and Method Selection:
The study involved the design and preparation of Ag@Fe3O4 core–shell nanoparticles (NPs) for use as Surface-Enhanced Raman Scattering (SERS) probes for trace arsenate (As(V)) detection. The NPs were prepared by in situ growth of Fe3O4 NPs on the surface of AgNPs.
2：Sample Selection and Data Sources:
The samples used were Ag@Fe3O4 core–shell NPs prepared through a solvothermal approach.
3：List of Experimental Equipment and Materials:
Materials included ethylene glycol, ferric nitrate, sodium acetate anhydrous, and AgNPs. Instruments used were a transmission electron microscope (TEM), UV-vis spectrophotometer, X-ray diffractometer (XRD), and a portable Raman spectrometer.
4：Experimental Procedures and Operational Workflow:
The NPs were prepared, characterized, and then used for SERS analysis of As(V) in aqueous solutions. The NPs were regenerated in NaOH solution for recyclic detection.
5：Data Analysis Methods:
The SERS intensity of As(V) was analyzed to determine detection limits and linear relationships with concentration.
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