Synthesis of polydopamine‐functionalized magnetic graphene and carbon nanotubes hybrid nanocomposites as an adsorbent for the fast determination of 16 priority polycyclic aromatic hydrocarbons in aqueous samples

Abstract

A novel adsorbent made of polydopamine-functionalized magnetic graphene and carbon nanotubes hybrid nanocomposite was synthesized and applied to determine 16 priority polycyclic aromatic hydrocarbons by magnetic solid phase extraction in water samples. FTIR spectroscopy, transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy consistently indicate that the synthesized adsorbents are made of core-shell nanoparticles well dispersed on the surface of graphene and carbon nanotubes. The major factors affecting the extraction efficiency, including the pH value of samples, the amount of adsorbent, adsorption time and desorption time, type and volume of desorption solvent, were systematically optimized. Under the optimum extraction conditions, a linear response was obtained for polycyclic aromatic hydrocarbons between concentrations of 10 and 500 ng/L with the correlation coefficients ranging from 0.9958 to 0.9989, and the limits of detection (S/N = 3) were between 0.1 and 3.0 ng/L. Satisfactory results were also obtained when applying these magnetic graphene/carbon nanotubes/polydopamine hybrid nanocomposites to detect polycyclic aromatic hydrocarbons in several environmental aqueous samples.

Simple Synthesis of Fe3O4@-Activated Carbon from Wastepaper for Dispersive Magnetic Solid-Phase Extraction of Non-Steroidal Anti-Inflammatory Drugs and Their UHPLC–PDA Determination in Human Plasma

“…In this context, carbon-based materials containing specific metal-organic structures have gained the attention of the scientific community for their easy synthesis, high porosity, and large surface area, which make them ideal absorbents in MSPE. Various magnetic carbon-based materials have been investigated for the separation of organic and inorganic contaminants, such as Fe 3 O 4 @MWCNT [15][16][17], NiMn 2 O 4 -nanosphere-decorated, cellulose-based carbon fibres [18], magnetic graphene, graphene oxide [19,20], Co@CNTS [21], etc. Currently, their widespread diffusion is limited because of the high cost of production and the cumbersome synthetic procedures, which consume a considerable amount of energy.…”

A poly(arylene ethynylene)-based microfluidic fluorescence sensor array for discrimination of polycyclic aromatic hydrocarbons

“…3,[13][14][15][16] These methods are sensi-tive and accurate, but are expensive and plagued by long analysis time, limiting their application, 17 in the field. On the other hand, nanomaterial-based sensors such as silver-nanoparticles/graphene hybrids, 18 quantum dots, 19 graphene, 20 and carbon nanotubes 21 are alternatives for PAHs monitoring. However, they suffer from poor discriminatory power in multianalyte detection.…”

Enhancement of thermal and mechanical properties of silicone rubber with γ-ray irradiation-induced polysilane-modified graphene oxide/carbon nanotube hybrid fillers

“… 18 Furthermore, the hybrid carbon nanomaterials can be also employed as advanced functional materials. Chen 19 synthesized polydopamine-functionalized graphene/CNTs as the adsorbent to measure the polycyclic aromatic hydrocarbons. However, CNTs and graphene are both difficult to disperse in the polymer matrix during processing, and they are not suitable for industrial-scale production because of the over complicated technology and expensive cost.…”