Synthesis Of heterocyclic Componds
Natural Chemistry
18
Scopus Publications
Scopus Publications
Novel Ni/Fe-MIL-53@ZnO nanocomposite for efficient photodegradation of aflatoxins G1 and G2 Zinat Gordi, Shiva Teilaghi Scientific Reports, 2025 The photodegradation of aflatoxins G1 and G2 (AFG1 and AFG2) is crucial for mitigating the health risks associated with these potent mycotoxins, as it enhances food safety and protects human health by reducing their persistence and bioavailability in contaminated environments. This study investigates the efficient photodegradation of AFG1 and AFG2 using a novel Bimetallic MIL-53 (Al, Ni)/ZnO nanoparticle composite as a photocatalyst. The catalyst was synthesized in two stages: Chemical synthesis of zinc oxide nanoparticles (ZnO NPs) and hydrothermal synthesis to form the composite. Optimization of a ZnO-based photocatalyst, synthesized by varying proportions of NiCl₂·6H₂O and Al(NO₃)₃·9H₂O, revealed that a 0.547 g:0.864 g ratio maximized photocatalytic degradation of AFG1 and AFG2. Through experimental design, the degradation process was optimized, identifying pH 4.1, 109 mg of photocatalyst, 35 mg L -1 of AF concentration, and 3 mM of H 2 O 2 concentration as optimal conditions. The predicted removal efficiencies for AFG1 and AFG2 were 97.43% and 98.69%, respectively. Kinetic studies utilizing the pseudo-first-order rate equation revealed rate constants of 0.058 ± 0.002 and 0.060 ± 0.003 min -1 for AFG1 and AFG2, respectively. Additionally, the half-life times for AFG1 and AFG2 photodegradation were found to be 11.95 and 11.55 min, respectively. Catalyst reuse investigations demonstrated that the composite could be reused at least 5 times without significant loss of efficacy. These findings highlight the effectiveness of the Bimetallic MIL-53 (Al, Ni)/ZnO NPs composite as a stable and efficient photocatalyst for the removal of AFG1 and AFG2 under mild conditions, showcasing its potential for practical applications in environmental remediation processes.
Adsorptive removal of enrofloxacin with magnetic functionalized graphene oxide@ metal–organic frameworks employing D-optimal mixture design Zinat Gordi, Mahdi Ghorbani, Maryam Ahmadian Khakhiyani Water Environment Research, 2020 A novel sorbent based on a mixture of magnetic functionalized graphene oxide and MOFs was developed to remove enrofloxacin (EFX) from water samples. The prepared sorbent was characterized using Fourier transform infrared spectra, scanning electron microscope images, and X‐ray powder diffraction pattern. The sorbent compositions were optimized by the mixture experimental design. Under the optimal condition, the percentages of each sorbent component, including triethylene tetramine‐functionalized graphene oxide (FGO), Fe3O4, and MOF‐5, were 40%, 21%, and 39%, respectively. Besides, the intraparticle diffusion and pseudo‐second‐order kinetic models can describe the EFX adsorption procedure because of two adsorption mechanisms of EFX on FGO and MOF‐5. A positive standard enthalpy of 49.80 kJ/mol indicated the EFX adsorption is endothermic with a chemisorption process. The negative values of ΔGo obtained in the range of −8.979 to −3.431 kJ/mol at all studied temperatures showed that the adsorption process was also spontaneous. The Langmuir and Freundlich isotherm models were analyzed with the partition coefficient to reduce bias in the isotherm model evaluation. The maximum adsorption capacity of 344.83 mg/g and a high partition coefficient of 17.42 g/L in an initial EFX concentration of 10 mg/L were obtained for the EFX removal.
Preparation and characterization of a novel biodegradable epoxy resin modified with epoxidized oleic acid F. Ravari, M. Toosi, Z. Gordi, R. Rahbarian, S. Fazeli Physical Chemistry Research, 2017 The goal of this research was to study the curing behavior and biodegradability DER 736 modified with epoxidized oleic acid. In this paper we demonstrate the efficient epoxidation of oleic acid with performic acid generated in situ from formic acid and hydrogen peroxide in the presence of H2SO4 as catalyst. The highest relative epoxy yield of 61% was achieved at 40 C after 10 h. DER 736 modified with epoxidized oleic acid was thermally cured using succinic anhydride as curing agent, in the presence of triethylamine. Also, degradation of new composite studied in the presence of three different loadings of epoxidized oleic acid (0, 20, and 40 wt %) with lipase from porcine pancreas in phosphate buffer. It was found that this agent caused reducing the weight of the samples in 45 days. SEM studies also revealed higher surface erosion phenomenon and structural change of the matrix with increasing epoxidized oleic acid.
Natural kaolin as an efficient recyclable catalyst for the synthesis of new 2,4-disubstituted quinolines Iranian Journal of Catalysis, 2016
Application of natural kaolin supported sulfuric acid as an ecofriendly catalyst for the efficient synthesis of bis(indolyl)methanes Zinat Gordi, Shaghayegh Eshghi, Shohreh Eshghi Synthesis and Reactivity in Inorganic Metal Organic and Nano Metal Chemistry, 2012 The acidified kaolin with sulfuric acid (2% w/w) is introduced as a novel, mild, highly efficient, easily prepared, very cheap, recyclable and ecofriendly catalyst in organic synthesis. This catalyst has been used successfully for the synthesis of bis(indolyl)methanes via the condensation of indoles with aldehydes at room temperature. The simplicity, efficiency, mild reaction condition, high yield of product, easy work up procedure, and recyclability of the catalyst are the advantages of this procedure.
Natural kaolin supported sulfuric acid as an efficient catalyst for selective hydrolysis of nitriles to amides Zinat Gordi, Hossein Eshghi Journal of the Korean Chemical Society, 2011 Natural Kaolin Supported Sulfuric Acid as an Efficient Catalyst for Selective Hydrolysis of Nitriles to Amides Zinat Gordi* and Hossein Eshghi Department of Chemistry, Payame Noor University, Torbat-eHeydarieh, Iran. *E-mail: gordi_z@yahoo.com Department of Chemistry, School of Sciences, Ferdowsi University of Mashhad, Mashhad, 91775-1436, Iran (Received November 6, 2010; Revised December 22, 2010; Accepted January 16, 2011)
