ZrO2 Nanoparticles and Poly(diallyldimethylammonium chloride)-Doped Graphene Oxide Aerogel-Coated Stainless-Steel Mesh for the Effective Adsorption of Organophosphorus Pesticides

Abstract

A novel sorbent based on the ZrO2 nanoparticles and poly(diallyldimethylammonium chloride)-modified graphene oxide aerogel-grafted stainless steel mesh (ZrO2/PDDA-GOA-SSM) was used for the extraction and detection of organophosphorus pesticides (OPPs). Firstly, the PDDA and GO composite was grafted onto the surface of SSM and then freeze-dried to obtain the aerogel, which efficiently reduced the accumulation of graphene nanosheets. It integrated the advanced properties of GOA with a thin coating and the three-dimensional structural geometry of SSM. The modification of ZrO2 nanoparticles brought a selective adsorption for OPPs due to the combination of the phosphate group as a Lewis base and ZrO2 nanoparticles with the Lewis acid site. The ZrO2/PDDA-GOA-SSM was packed into the solid-phase extraction (SPE) cartridge to extract OPPs. According to the investigation of different factors, the extraction recovery was mainly affected by the hydrophilic-hydrophobic properties of analytes. Effective extraction and elution parameters such as sample volume, sample pH, rate of sample loading, eluent, and eluent volume, were also investigated and discussed. Under the optimal conditions, the linearity of phoxim and fenitrothion was in the range of 1.0–200 μg L−1, and the linearity of temephos was in the range of 2.5–200 μg L−1. The limits of detection were ranged from 0.2 to 1.0 μg L−1. This established method was successfully applied to detect OPPs in two vegetables. There was no OPP detected in real samples, and results showed that the matrix effects were in the range of 46.5%–90.1%. This indicates that the ZrO2/PDDA-GOA-SSM-SPE-HPLC method could effectively extract and detect OPPs in vegetables.

Au@ZrO2 core‐shell nanoparticles as a surface‐enhanced Raman scattering substrate for organophosphorus compounds detection

“…The electronegativity of O element of phosphate group in OPs compounds is greater than that of P element, and the electron cloud density of oxygen element in the molecule is high. [ 27 ] Therefore, OPs molecules usually contain strong lewis alkaline properties. Consequence, based on the principle of lewis acid–base mutual attraction, ZrO 2 can be used as a functional shell for the adsorption of OPs molecules.…”

Recent advances in the medical applications of hemostatic materials

“…Oxide-based aerogels such as TiO 2 , ZrO 2 , and Al 2 O 3 are used primarily to prevent air and water pollution. Electrically conductive oxide-based aerogels have also been developed 216 , 217 .…”

Applicability and Limitations of a Capillary-LC Column-Switching System Using Hybrid Graphene-Based Stationary Phases

“…Graphene-based phases can be present in different ways. Fe 3 O 4 magnetic particles containing graphene [ 4 ] or graphene oxide [ 5 ], graphene-based aerogels [ 6 , 7 ] and hydrogels [ 8 , 9 ], and graphene-based material fixed on silica particles [ 10 , 11 , 12 ] are examples of how these materials can be produced. Other possibilities of application for graphene-based materials are summarized in recent reviews [ 13 , 14 , 15 ].…”