Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection.
Ni XiaoWei WengDing TangWen TanLiye ZhangZheyuan DengXiaopeng ChiJiangang KuShuiping ZhongPublished in: Molecules (Basel, Switzerland) (2023)
The direct and rapid determination of trace cobalt ion (Co 2+ ) in the electrolyte of zinc smelting plants is urgently needed but is impeded by the severe interference of extremely high-concentration zinc ions in the solution. Herein, colorimetric detection of Co 2+ by the polyvinylpyrrolidone functionalized silver nanoparticles (PVP-AgNPs) is realized in solutions with the Zn/Co ratio being high, up to (0.8-5) × 10 4 , which is located within the ratio range in industrial solution. The high concentration of Zn 2+ induces a strong attenuation of Co 2+ -related signals in ultraviolet-visible (UV-vis) extinction spectra; nevertheless, a good linear range for detecting 1-6 mg/L Co 2+ in 50 g/L Zn 2+ solution is still acquired. The strong anti-interference toward other metal ions and the mechanism understanding for trace Co 2+ detection in such a high-concentration Zn 2+ solution are also revealed by systematic analysis techniques. The results extend the AgNPs as colorimetric sensors to industrial solutions, providing a new strategy for detecting trace-metal ions in industrial plants.
Keyphrases
- heavy metals
- silver nanoparticles
- loop mediated isothermal amplification
- quantum dots
- gold nanoparticles
- risk assessment
- aqueous solution
- sensitive detection
- wastewater treatment
- label free
- hydrogen peroxide
- fluorescent probe
- living cells
- reduced graphene oxide
- real time pcr
- early onset
- oxide nanoparticles
- high resolution
- single molecule
- mass spectrometry
- nitric oxide
- drug induced
- simultaneous determination
- ion batteries