GO-Mo-Ni-Layered Double Hydroxide Decorated Amino-Functionalized Zirconium Terephthalate Metal-organic Framework for Extraction of Chlorobenzenes from Solid and Liquid samples

Porous materials today include a wide range of compounds that can have a crystalline oramorphous structure, a natural or synthetic base, and an inorganic or organic origin. Until a few decadesago, zeolites and carbon-based materials were considered to be the most important porous inorganic andorganic solids. Metal-Organic Frameworks as Porous Mineral-Organic Hybrid Compounds by combiningthe properties of these two categories have been able to provide further advantages provide. Although allof these compounds are considered to be porous solids, MOFs are different from zeolites in many respects.Structural diversity in MOFs is very high due to the possibility of selecting different components and theirability to operate. However, aluminosilicate zeolites are limited to ۴-sided oxide structures. In this study, anew efficient adsorbent of graphene oxide (GO)@Mo-Ni-layered double hydroxides@metal-organicframework (GO@Mo-Ni-LDH@UiO-۶۶-NH۲) was synthesized and used for extraction of Chlorobenzensfrom solid and aqueous samples prior to their determination by GC-MS. The adsorbent was characterizedby Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), EnergyDispersive X-Ray (EDX), X-ray Diffraction (XRD), and Brunauer-Emmett-Teller (BET) analyses. Theimpact of various parameters affecting the GO-Mo-Ni-LDH@UiO-۶۶-NH۲ process were studied. The mainfactors such as pH of the aqueous phase, extraction time, amount of adsorbent, type and volume of eluentsolvent, desorption time, and sample volume were optimized with a design of experiment technique . Themaximum extraction recovery was obtained at an optimized pH ۸.۰ and extraction time ۲۰.۰ min. Theadsorption process was fitted by the Langmuir model with a maximum adsorption capacity of ۷۳۵.۱۲ mg/g.The calibration curve was linear with correlation coefficients ranging from ۰.۹۹۸۱–۰.۹۹۹۶ for aconcentration range of ۰.۵–۱۰۰ ng/ml. Under optimum conditions, the limits of detection and quantificationranged from ۰.۰۱۰–۰.۱۵۶ ng/m۱ and ۰.۱۹۴–۲.۳۰ ng/m۱, respectively. Recoveries ranged from ۸۹.۶–۱۰۴.۱% with relative standard deviation of less than ۱.۲%, Furthermore, the GO@Mo-Ni-LDH@UiO-۶۶-NH۲ composite showed high efficiency for the removal of the Chlorobenzenes from environmental Soil andwater samples.