Graphene Oxide Deposited with Transition Metal Chalcogenide for Selective Extraction and Determination of Hg(II): Experimental and Computational Analysis.
Huda AlsaeediHilal AhmadMalak Faisal AltowairqiNouf AbdulRahman AlmuryyiAli M AlsalmePublished in: Nanomaterials (Basel, Switzerland) (2022)
A graphene oxide (GO/CdS) nanocomposite was synthesized by an in situ hydrothermal process and studied to develop a micro solid phase extraction procedure. Microscopic and spectroscopic characterizations have confirmed the successful preparation of the GO/CdS composite. The prepared nanocomposite selectively extracts Hg(II) ions from various water samples (tap, river, and groundwater). The intriguing characteristic of GO sheets is to provide exceptional hydrophilicity and Hg(II) accessibility to surface-decorated CdS nanoparticles. The GO/CdS nanocomposite shows excellent extraction of trace Hg(II) in a short interval of time. Computations based on density functional theory (DFT) suggest that energetically favorable multinuclear S-Hg binding leads to rapid adsorption with high sorption capacity at GO/CdS sites. The analytical features of merit suggested that the developed method has a low detection limit (0.07 µg L -1 ) and shows good accuracy and precision (with RSD 3.5%; N = 5). The developed method was verified by analyzing SRM 1641d (Standard Reference Material) and real samples after spiking to a predetermined amount.
Keyphrases
- quantum dots
- solid phase extraction
- aqueous solution
- density functional theory
- molecularly imprinted
- sensitive detection
- fluorescent probe
- visible light
- high performance liquid chromatography
- liquid chromatography tandem mass spectrometry
- loop mediated isothermal amplification
- living cells
- liquid chromatography
- tandem mass spectrometry
- heavy metals
- transition metal
- simultaneous determination
- reduced graphene oxide
- molecular docking
- molecular dynamics
- gas chromatography mass spectrometry
- ultra high performance liquid chromatography
- mass spectrometry
- gas chromatography
- health risk
- anaerobic digestion
- highly efficient
- water quality
- sewage sludge
- label free
- walled carbon nanotubes