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Roya Mohammadzadeh Kakhki

Roya Mohammadzadeh Kakhki
University of gonabad · Chemistry

phD

About

53
Publications
9,511
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698
Citations
Citations since 2017
26 Research Items
527 Citations
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140

Publications

Publications (53)
Article
The current study reports a successful cation-selective electrode based on CoNiFe2O4 magnetic nanocomposite to determine the Ce³⁺ ion. The results revealed this new nanocomposite can be applied as an excellent modifier in lieu of common organic modifiers that are used in the construction of ion-selective electrodes. The replacement of nanocomposite...
Article
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Photocatalysis is a clean, cost-effective and time-efficient method for degradation of organic pollutants and also other usages such as CO2 photoreduction. In this field, the development of suitable photocatalysts that can be active under visible light irradiation has received much attention and research. To achieve this goal, making photocatalysts...
Article
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In this work, a new photoelectrochemical sensor based on Cu3V2O8 nanostructure-doped poly ethylene glycol-modified pencil graphite electrode was prepared and was applied for determination of acetaminophen. The electrochemical performance of this new sensor was examined by cyclic voltammetry, differential pulse voltammetry and Chronoamperometry. The...
Article
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This study presents the development of a new and sensitive polyvinyl chloride electrode based on cadmium oxide (CdO) nanoparticles and N-phenylaza-15-crown-5 for the selective determination of cadmium cations. To this end, synthesized cadmium oxide nanoparticles were characterized through XRD, FT-IR and FESEM analysis. Then, CdO nanoparticles were...
Article
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In this work, copper-modified nanoalum as a new natural-based sorbent was synthesized and characterized. Then, it was applied for methyl orange removal from water samples. The effect of some parameters such as initial dye concentration, pH, adsorbent dose and temperature on the removal efficiency was investigated. Under optimal condition, the maxim...
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One of the most important challenge in recent years is the removal and even better than that the degradation of poisons from environmental systems. Nanostructures due to their interesting properties are very suitable for this purpose. Herein, Cd3OSO4 nanomaterial was synthesized with a simple co precipitation method, characterized and was used, as...
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In this work a simple dispersive solid phase microextraction based on Co3O4 modified nanoclinoptilolite was developed for the preconcentration and fast determination of malachite green in the environmental samples. In the first step a rapid mass transfer of dye to the surface of the sorbent was accrued and therefore, the extraction process was perf...
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Contamination of wastewaters with pesticides has significant risk for environmental water. In spite of the rule of Europ, paraquat is used extensively as an herbicide in the all around the world and it is likely to be released into drinking water. Therefore the elimination of it from water is very important. In this paper a new sulfuric acid modifi...
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In this study, a new sulfur–nitrogen co-doped Fe2O3 nanostructure was synthesized via a simple and efficient method and characterized via UV-Vis spectrophotometry, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Brunauer–Emmett–Teller surface area analysis. The as-synthesized nanoparticles s...
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In this paper Cu3V2O8 nanoparicles were synthesized with a low‐cost and green method with using the extract of Moringa peregrine. This novel synthesized material was characterized by using X‐ray diffraction (XRD), Field emission scanning electron microscopy (FESEM) and Energy‐dispersive X‐ray spectroscopy (EDS) analysis. The analysis showed the pro...
Article
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Phosphotungstic acid (H3PW12O40, PTA) supported on ZIF‐9(NH2) was synthesized for the first time and performed as an effective and environmental friendly catalyst in the one‐pot three component Biginelli condensation of different substituted benzaldehydes with ethyl acetoacetate and urea to afford the corresponding 3,4‐dihydropyrimidin‐2‐(1H)‐ones...
Article
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In this study a new ZnO doped nanoclinoptilolite was synthesized and the morphology and properties of this new nanocomposite were studied using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Field emission scanning electron microscopy (FESEM). The effective substance (ZnO) amount on clinoptilolite substrate was...
Article
Background: Simultaneous determination of medication components in pharmaceutical samples using ordinary methods have some difficulties and therefore these determinations usually were made by expensive methods and instruments. Chemometric methods are an effective way to analyze several components simultaneously. Objective: In this paper a novel ap...
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In this article we reported a new and green method for synthesis of Ag nanoparticles based on anbarnesara. Anbarnesa derived from female donkeys and its antioxidant effects have been well-known. Since this synthesis method is very simple, environmental friendly and high crop production, therefore this method can be scaled up for synthesis of metal...
Article
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In this paper Co3O4 doped nanoclinoptilolite was synthesized and characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDX) techniques. The adsorption efficiency for removing of methylene blue was about 95% in 10 min. The effect of s...
Article
In the present report, a novel cadmium-manganese oxide (CdMn2O4) nanocomposite was prepared using a simple co-precipitation method and further characterized for its properties and adsorption performance. XRD analysis showed the formation of CdMn2O4 crystalline phase. FESEM images showed that this new crystal compound has spherical morphology with t...
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Adsorption of anionic dyes onto most of zeolites with net negative charge may be restricted. In this article, a natural nanoclinoptilolite was modified with Cu and the obtained nanomaterial was used as an effective adsorbent for removal of methyl red as an anionic model azo dye up to 90% in 20 min.This new adsorbent was characterized utilizing X-ra...
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In this work a new, simple and low cost method for synthesis of zinc oxide and zinc vanadate nanoparticles was proposed. The as-prepared nanoparticles were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, Field emission scanning electron microscopy and electron dispersive X-ray spectroscopy. For evaluation of photocat...
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SBA‐15‐PS/phthalhydrazide (PHD) is presented as a new heterogeneous inorganic–organic nanohybrid photocatalyst with high stability, superior recyclability and remarkable performance in the degradation of methyl orange (MO). Distinctive parameters, including photocatalyst and dye concentrations, pH and degradation time, were assessed for MO degradat...
Article
Phthalhydrazide nanoparticles are introduced as a new, efficient, stable and reusable organic photocatalyst for the photodegradation of a range of azo dyes, including methyl orange, methyl red, congo red and yellow titan, 4-nitrophenol and permanganate as important organic and inorganic contaminants. Various experimental parameters including pH, ph...
Article
A simple and efficient procedure for the synthesis of benzimidazoles, benzoxazoles, and benzothiazoles via the condensation of o-phenylenediamine, o-aminophenol, and o-aminothiophenol with various benzaldehydes by using magnetic Co-doped NiFe2O4 nanoparticles has been developed. This nanocatalyst has advantages such as excellent product yields, sol...
Article
It is shown that the sensor arrays can acquire more information on a given sample than an individual sensor. The main classes of gas-sensing materials include metal-oxide semiconductors. Gas sensors based on chemiresistive semiconducting metal-oxides have many potential benefits including, their very low cost, fast response, recovery time, simple e...
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Due to excellent properties, recently ZnO nanomaterials are used as very efficient photocatalysts for the photocatalytic degradation of toxic organic dyes and chemicals under various light radiations. In this article we used a new and simple method for synthesis of high efficient AgxZn1−xO (x = 0, 0.3, 0.5, 1, 2, 4, 6) nano photocatalyst in visible...
Article
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Synthesis of magnetic nanoparticles has been intensively pursued due to their unique functional properties. In this paper a Co doped NiFe2O4 was synthesized. The magnetic measurements of Co doped NiFe2O4 showed that the photocatalyst material can be separated from water when an external magnetic field is applied and redispersed into water solution...
Article
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In order to obtain well-dispersed CuO–SiO2 nanocomposites, we used a new synthesized Cu-nanocomplex, which was prepared by ultrasonic method. The CuO–SiO2 nanocomposites were synthesized by a sol–gel method. The as-synthesized products were characterized by XRD, TEM, SEM, and FT-IR techniques. Photo catalyst activity of the products was investigate...
Article
The surface structure of common graphite electrodes are suitable for electrochemical detection of various analytes due to their favorable properties such as good conductivity and resistance to environmental and chemical hazards. Also this material is cheap and available. Modifying the surface of electrode improves their ability for various determin...
Article
A series of symmetrical N, N'-alkylidenebisamides were successfully synthesized via a one-pot three-component green and environmentally friendly condensation of aliphatic and/or aromatic aldehydes with benzamide by the mediation of 2.5 mol% H7[(P2W17O61)FeIII(H2O)] as Lewis/Bronsted acid catalyst with good to excellent yields in moderately short re...
Research
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Today the development of crown ether functional nanoparticle as colorimetric sensors is a subject of considerable interest. In this article we investigated on the use of nanoparticle modified with crown ether for sensing of metal ions and also charged molecules with colorimetric technique.
Article
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There is a general need to develop simple, rapid, and inexpensive detection assays for diagnostic applications and environmental analysis. Currently, most analyses are performed under laboratory conditions, frequently with the assistance of expensive instruments and trained personnel. Colorimetric sensors as dipsticks or in a chromatographic format...
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Compared to the traditional micron-sized supports used in separation process, nano-sized adsorbents possess quite good performance due to high specific surface area and the absence of internal diffusion resistance, which improve adsorption capacity. Recently, magnetic technology has been applied in pollution removal. Over the past few years, magnet...
Article
A simple mean centering of ratio spectra method was developed for the simultaneous determination salisylic acid and benzoic acid without prior separation steps. The mathematical explanation of the procedure is illustrated. The procedure is successfully applied to the simultaneous determination of these analytes in fruit joice samples.
Article
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The unique properties of carbon fiber electrodes (CFEs) offer a number of particular advantages for their use in analytical applications. However, some pretreatment is usually necessary for the modification of the carbon surface. One of these methods is enzyme modification, that enzyme reactions in the surface of the electrode can be useful for the...
Article
Capillary electrophoresis is an establishing separation technique for a wide spectrum of analytes, ranging from small inorganic ions to macromolecules and it provides reliable data, requires minimal sample preparation and offers a high degree of automation. Application of crown ethers in the capillary electrophoresis because of their unique charact...
Article
Full-text available
This paper describes the development of a new method based on dispersive liquid–liquid microextraction (DLLME) preconcentration for determination of Rose Bengal (RB) residues in water. The extracted Rose Bengal was separated, identified, and quantified by UV–Vis spectrophotometry. The influence factors relevant to DLLME, such as type and volume of...
Article
Full-text available
Among the various analytical techniques available, the use of ion-selective electrodes is a wellestablished routine analytical technique. Good ion-selective electrodes (ISEs) possess many advantages over traditional methods for analysis and provide accurate, reproducible, fast, and regular selective determination of various ionic species. Modificat...
Article
Banana tissue containing polyphenol oxidase was incorporated into polypyrrole matrix to make a biosensor for the analysis of acetaminophen (ACT). The electrocatalytic behaviour of oxidized acetaminophen was studied at the surface of the biosensor, using various electrochemical methods. The advantages of this biosensor for the determination of aceta...
Article
Full-text available
Selective transport of lead(II) cation across a bulk liquid membrane(BLM) containing dicyclohexano-18-crown-6 (DC18C6) as carriers has been studied. Various factors that affect the transport efficiency of this heavy metal cation have been optimized in order to obtain maximum transport. It has been observed that in the presence of EDTA as stripping...
Article
Sample preparation is essential for isolating desired components from complex matrices and greatly influences their reliable and accurate analysis. Microextraction techniques such as solid phase micro extraction and liquid–liquid–liquid micro extraction based on hollow fiber and also single drop micro extraction methods are new and effective sample...
Article
Recently, much attention has been paid to chromatographic characteristics and applications of crown ethers. These compounds were employed as chiral stationary phase for resolution of various racemic compounds in high performance chromatography and capillary electrochromatography techniques. Crown ethers also used in gas chromatography as the statio...
Article
A uranyl cation selective electrode based on benzo-15-crown-5(B15C5) incorporated into a polyvinylchloride (PVC) membrane has been developed. The electrode was prepared by coating the surface of a graphite rod by a membrane containing dioctylphtalate (DOP) as plasticizer, B15C5 as an ionophore, carbon powder and polyvinylchloride (PVC) in tetrahydr...
Article
In the present study, a novel electrode based on 2,9-dihydroxy-1,10-diphenoxy-4,7-dithiadecane (DHDPDTD) that is selective to cerium (III) cations was evaluated electrochemically, and a Nerenstian slope (19.3 ± 1 mV decade−1) over a concentration range of 1.0 × 10−8–1.0 × 10−1 M and a detection limit of 2.1 × 10−9 M were observed. The proposed elec...
Article
In this study, the simultaneous conductometric titration method for determination of mixtures of 4-nitrophenol, 2,4-dinitrophenol, and 2,4,6- trinitrophenol based on principal component artificial neural network (ANN) calibration model was proposed. The three-layered feed-forward ANN trained by back-propagation learning was used to model the comple...
Article
The complexation reaction of macrocyclic ligand, dibenzo-18-crown-6 (DB18C6) with UO22+ cation was studied in ethylacetate-1,2-dichloroethane (EtOAc/DCE), acetonitrile-1,2-dichloroethane (AN/DCE), methanol-1,2-dichloroethane (MeOH/DCE) and ethanol-1,2-dichloroethane (EtOH/DCE) binary solutions at different temperatures using the conductometric meth...
Article
Full-text available
The stability constants (Kf) for the complexation reactions of Cr3+, Mn2+ and Zn2+ metal cations with macrocyclic ligand, 15-crown-5 (15C5), in acetonitrile (AN), ethanol (EtOH) and also in their binary solutions (AN–EtOH) were determined at different temperatures, using conductometric method. 15C5 forms 1:1 complexes with Cr3+, Mn2+ and Zn2+ catio...
Article
Competitive transport of Zn(II), Cd(II), Cr(III), Co(II), Ag(I), Pb(II), and Cu(II) cations from an aqueous source phase at pH 5 through bulk liquid membrane (BLM) containing 18-crown-6 (ion carrier), organic solvents chloroform, dichloromethane, 1,2-dichloroethane, and nitrobenzene, and chloroform–dichloromethane and chloroform–dichloroethane bina...
Article
Full-text available
An yttrium (III) cation selective electrode based on kryptofix-22DD (1,10-didecyl-1,10-diaza-18-crown-6) incorporated into a polyvinylchloride (PVC) membrane has been developed. The optimized membrane incorporating dibutylphtalate (DBP) as plasticizer, kryptofix-22DD and palmitic acid as a new component in a highly selective and sensitive coated wi...
Article
Full-text available
The complexation reactions between K+, Ag+, NH4+, and Hg2+ cations and the macrocyclic ligand, dibenzo-18-crown-6 (DB18C6), were studied in ethylacetate (EtOAc)-dimethylformamide (DMF) binary mixtures at different temperatures using the conductometric method. The conductance data show that the stochiometry of all the complexes is 1:1. A non-linear...
Article
Selectivitiy and transport efficiency for competitive transport of some transition metal cations containing Zn(II), Cd(II), Cr(III), Co(II), Ag(I), Pb(II) and Cu(II) across different bulk liquid membranes have been determined by dicyclohexyl-18-crown-6 as carrier. The membrane solvents include: dichloromethane, chloroform, 1,2-dichloroethane, nitro...
Article
Full-text available
In the present work the complexation process between UO22+ cation and the macrocyclic ligand, dibenzo-18-crown-6 (DB18C6) was studied in ethylacetate–dimethylformamide (EtOAc/DMF), ethylacetate–acetonitrile (EtOAc/AN), and ethylacetate–tetrahydrofuran (EtOAc/THF) and ethylacetate–propylencarbonate (EtOAc/PC) binary solutions at different temperatur...

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