Alimohammad Haji Shabani

Yazd University · Department of Chemistry

A novel dispersive magnetic micro-solid-phase extraction (DM-µ-SPE) method based on the magnetic NiFe2O4 polyamidoamine dendrimers modified with deep eutectic solvent sorbent has been developed for the extraction of naproxen and nabumetone. The extracted analytes were quantified by a high-performance liquid chromatographic (HPLC) method with UV det...

An agar/polyethylene glycol hydrogel was synthesized and modified with iminodiacetic acid (IDA-agar/PEG), and its ability as a biocompatible sorbent for extraction of manganese (II) ions from different environmental and food samples was investigated. The prepared IDA-agar/PEG hydrogel was characterized by scanning electron microscopy (SEM), Fourier...

The present study describes the development of a simple and selective analytical method for dispersive micro solid phase extraction and determination of glibenclamide (GLB) using magnetic molecularly imprinted polymer (MMIP) as a sorbent. MMIP was fabricated by the non-covalent method on the surface of silicated Fe3O4 and had a high affinity for gl...

A humic acid-gelatin (HA-Gel) hydrogel, a gallic acid-xanthan gum (GA-XG) hydrogel, a HA-Gel/GA-XG hydrogel, and superabsorbent polymer (SAP) of HA-Gel/GA-XG/polyacrylamide (PAM) hydrogel were synthesized using electron beam irradiation method. The capability of synthesized hydrogels in loading and controlled release of fulvic acid (FA) was studied...

Different generations of polyamidoamine dendrimers were synthesized on a focal core of magnetic graphene oxide modified with 3-aminopropyltriethoxysilane. After the characterization of synthesized dendrimers, its second generation was employed as a suitable sorbent for simultaneous separation/preconcentration of diclofenac and acetaminophen by a di...

In the current study, a biocompatible hydrogel sorbent is prepared by chemical conjunction between gum tragacanth polymer chains and polyvinyl alcohol using electron beam irradiation followed by chemical stabilization of tannin on its surface. The synthesized composite hydrogels are analyzed using infrared spectroscopy, scanning electron microscope...

In this study, a biocompatible sorbent based on copper nanoparticles was synthesised from the extract of cinnamon. The sorbent was characterised by X-ray diffraction, field emission electron microscopy, and Fourier transform infrared spectroscopy. Then, the capability of the prepared sorbent was evaluated for the removal of the Janus Green B (JGB)...

A magnetic molecularly imprinted polymer (MMIP) was fabricated for captopril by surface polymerization of Fe3O4@SiO2 nanoparticles using a new functional monomer of N-(allylcarbamothioyl)-2-chlorobenzamide. It was then employed as a selective nanosorbent for dispersive magnetic micro solid phase extraction (DM-μ-SPE) of captopril from biological an...

A simple, sensitive, and selective fluorometric method based on graphene quantum dots and Hg2+ is presented for the determination of tetracycline. The fluorescence emission of graphene quantum dots at 463 nm decreased in the presence of Hg2+ ions due to its electrostatic interaction with the negatively charged surface of quantum dots at pH = 8.0. T...

A topical wound dressing system containing ciprofloxacin was designed through the fabrication of two hydrogels by coupling gelatin with ethyl vanillin and its composite with polyvinyl alcohol using electron beam irradiation. The composite hydrogel films were loaded with ciprofloxacin by the equilibrium swelling method and its release was investigat...

Green synthesis of nanoparticles, especially magnetic nanoparticles, is considered a research interest in nanotechnology and nanobiotechnology. This procedure leads to the improvement of the chemical and biological properties of nanoparticles in comparison with chemical synthesis. In this study, functionalized magnetic iron oxide nanoparticles (FMN...

In this study, a sensitive fluorimetric method is proposed for the determination of piroxicam using nitrogen graphene quantum dots (N-GQDs) and gold nanoparticles coated with phenylalanine. The fluorescence emission of N-GQDs at 440 nm decreases with the increase of gold nanoparticles coated with phenylalanine. However, the addition of piroxicam ca...

A novel sorbent consisting of magnetic oxidized nanocelluloses modified with graphene quantum dots was prepared and used for the separation and preconcentration of dopamine. The eluted dopamine from the sorbent was determined by a designed chemiluminescence system containing luminol, H2O2, Fe³⁺, and graphene quantum dots doped with nitrogen and pho...

A sensitive and selective method is reported for the determination of the low amount of tetracycline in real samples. The tetracycline is extracted and preconcentrated by dispersive liquid‐liquid microextraction followed by retrieval of the extract with magnetic solid‐phase extraction. The extracted analyte is determined by a selective spectrophoto...

A pH-sensitive nano-graphene oxide (nGO)-based delivery system is designed for Cur delivery to MCF cancerous cells. Cur is loaded on the synthesized nGO (Cur-nGO) and decorated by bovine serum albumin (BSA) to improve its biostability, protect the Cur from undesired loss and provide the carboxylic functional groups for aptamer conjunction (Cur-nGO-...

Sulfur and nitrogen-doped graphene quantum dots (S, N-GQDs) was synthesized and a selective measurement method was designed for the quantification of furazolidone based on fluorescence quenching of synthesized quantum dots. Furazolidone was first separated and preconcentrated from samples with complex matrices by magnetic solid-phase microextractio...

A selective off-on aptasensor was designed to measure tumor marker alpha-fetoprotein (AFP). Nitrogen carbon quantum dots modified with aptamer was synthesized. The addition of oxidized nanocellulose to this system causes quenching of the fluorescence intensity. But in the presence of AFP, the aptamers bind strongly with AFP, resulting in the releas...

Melia azedarach fruit extract is used to synthesize iron-polyphenol nanohydrogel and its capability as a flocculant in coagulation and removal of Disperse Yellow 211 dye from the aqueous solution is examined. The structure of iron-polyphenol nanohydrogel is studied by Fourier transform infrared spectroscopy, field emission scanning electron microsc...

In this study, a sensitive fluorimetric method is proposed for the determination of piroxicam using nitrogen graphene quantum dots (N-GQDs) and gold nanoparticles coated with phenylalanine. The fluorescence emission of N-GQDs at 440 nm decreases with the increase of gold nanoparticles coated with phenylalanine. However, the addition of piroxicam ca...

A sensitive fluorescent nanoprobe is reported for the determination of lamotrigine after its preconcentration by magnetic graphene oxide nanocomposite. The fluorescent nanoprobe is based on the quenching effect of lamotrigine on the nitrogen graphene quantum dots fluorescence at 440 nm, through strong hydrogen bonding. Under optimum conditions, the...

A simple supramolecular dispersive liquid-liquid microextraction-solidified floating organic drop (SMDLLME-SFOD) method was developed for the separation and preconcentration of brilliant green (BG) before its spectrophotometric determination. The method is based on the extraction of ion-pair of BG with sodium dodecyl sulfate into the coacervates ma...

In syringe-supramolecular dispersive liquid-liquid microextraction followed by flame atomic absorption spectrometry has been designed for extraction and speciation of iron in different samples. Fe(III) is complexed with 4,5-dihydroxy-1,3-benzendisulfonic acid (Tiron), neutralised through the formation of the ion pair with the ionic liquid of 1-hexa...

This paper reports a new approach for the simultaneous extraction of individual analytes based on the simultaneous application of multiple magnetic sorbents using a simple automated system. A mixture of toxic metals including Cd(II) and Cr(III) was selected as model analytes and two selective magnetic nano-sorbents were prepared for each analyte by...

The first dual-modality highly intensive fluorescent and colorimetric nanoprobe for Fe³⁺ ions and histidine is reported. The carbon dots doped by nitrogen and sulfur (N,S-CDs) prepared by the one-pot hydrothermal method have an excitation/emission wavelength of 320/420 nm with 56% quantum yield. N,S-CDs exhibit strong visible fluorescence with high...

In this work, various types of metal‐organic frameworks were synthesized, and their affinities towards buprenorphine were evaluated using dispersive solid‐phase extraction. The extracted buprenorphine was determined by ultra‐performance liquid chromatography‐ultraviolet detection system. The highest extraction recovery was observed by employing zeo...

Cumin seeds extract containing plant polyphenols was used as a reducing agent forthe preparation of iron-based magnetic nanoparticles. Then, functionalised magnetic nanoparticles (FMNPs) and chitosan were used to synthesise a novel magnetic polymeric nanocomposite (MPNC) with high efficiency and fast sorption kinetics for Reactive Black 5 removal....

Molecularly imprinted polymer (MIP) was synthesized through the coprecipitation method on the graphene oxide anchored pencil lead as a substrate for the first time and applied as an efficient sorbent for pseudo stir bar sorptive extraction of nabumetone. The extracted analyte was determined by a novel spectrophotometric method based on the aggregat...

Two hydrogels of O-carboxymethyl chitosan conjugated with caffeic acid and its composite with polyacrylamide were synthesized using electron beam irradiation. The synthesized hydrogels were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and mechanical properties...

A sensitive fluorometric assay is described for the direct determination of the antibiotic sulfadiazine. Silver nanoparticles placed on graphene quantum dots (Ag NP-GQDs) were synthesized by reduction of AgNO3 with sodium borohydride in the presence of GQDs. The growth of Ag NPs on the surface of the GQDs causes quenching of the blue fluorescence o...

Novel molecularly imprinted polymer (MIP) for metformin was synthesized on the surface of magnetic multi-walled carbon nanotubes (MMWCNTs) as the support. Metformin was used as the template, methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the cross-linker and 2,2'-azoisobutyronitrile (AIBN) as the initiat...

In the present study, for the first time, the magnetic graphene oxide was simultaneously functionalized and reduced with the aim of imidazole-based l-histidine amino acid (rGO/Fe3O4-histidine). The prepared nanocomposite was characterized by field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and v...

A fast, cost-effective and reliable method is presented for separation and preconcentration of trace amounts of cadmium based on co-precipitation and flotation prior to its flame atomic absorption (AAS) spectrometric determination. Cadmium (II) was complexed with iodide and neutralized with cetyltrimethylammonium bromide (CTAB) in the presence of p...

A simple nano-sized magnetic particles solid phase extraction (MSPE) was developed for simultaneous extraction and preconcentration of cobalt and nickel in water and food samples prior to their determination by flame atomic absorption spectrometry. This method was based on the reaction of trace amounts of cobalt and nickel from aqueous solutions wi...

A hollow fiber reinforced with molecularly imprinted polymer supported on multiwalled carbon nanotubes has been fabricated and used as a sorbent for the microextraction and preconcentration of furazolidone from real samples. The fabricated sorbent has the advantages of rigidity, stability, high selectivity as well as excellent mechanical properties...

Recently DNA aptamers have attracted remarkable attention as possible targeting ligands since selective targeting of cancer cells is a critical step in cancer diagnosis and therapy. Here, the development of AS1411 aptamer-functionalized albumin nanoparticles loaded on iron oxide and gold nanoparticles is reported for target delivery of the well-kno...

Electron beam irradiation was used for the synthesize of porous and non-porous pectin based hydrogels through conjugation of pectin with 5-hydroxytryptophan in the presence and absence of sodium dodecyl sulfate, respectively. The hydrogels were characterized by different methods. Tetracycline hydrochloride was loaded on the hydrogels by swelling eq...

A highly selective, sensitive, and rapid colorimetric sensor for the determination of dopamine (DA) was developed using the color change of S-doped carbon dots functionalized gold nanoparticles ([email protected] NPs). The base of the method is the formation of a complex between the amine groups of dopamine with carboxylic groups of [email protecte...

A dopamine-pectin hydrogel (Dop-Pec hydrogel) and a Dop-Pec hydrogel modified with tannic acid (Dop-Pec/Tan hydrogel) were synthesized and their capability for the removal of the cationic dye methylene blue (MB) from aqueous solutions was investigated. The Dop-Pec hydrogel was prepared through conjugation of dopamine with pectin using a heterogeneo...

A rapid, simple, and sensitive dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFOD) method coupled with UV-Vis spectrophotometry has been applied for the extraction and determination of trace amounts of aluminium. The aluminium was extracted from the aqueous media containing aluminon and cetyltrimet...

A bio-compatible hydrogel sorbent was prepared through chemical conjugation of glutamic acid (GA) with gum tragacanth (GT) followed by mixing with anionic polyacrylamide (PAAm) and irradiating by the electron beam. The prepared composite of the hydrogel of GA-GT/PAAm was characterized by scanning electron microscopy (SEM), Fourier transform infrare...

A novel magnetic dispersive solid phase extraction method using magnetic multi-walled carbon nanotubes modified with 5-mercapto-3-phenyl-1,3,4-thiadiazole-2-thione potassium salt (bismuthiol II) (MMWCNTs@Bis) as the sorbent was developed for the separation and preconcentration of inorganic selenium (IV) prior to its determination by electrothermal...

A simple supramolecular solvent microextraction followed by solidification of floating coacervates has been developed for the preconcentration and speciation of vanadium prior to its determination by electrothermal atomic absorption spectroscopy. The speciation is based on the extraction of the hydrophobic complex of V(V) with N-benzoyl-N-phenylhyd...

A simple, environmentally benign and rapid method based on temperature‐controlled liquid–liquid microextraction using a deep eutectic solvent was developed for the simultaneous extraction/preconcentration of diazinon and fenitrothion. The method involved the addition of deep eutectic solvent to the aqueous sample followed by heating the mixture in...

A magnetic molecularly imprinted polymer (MMIP) was fabricated and used as the sorbent for the MMIP-dispersive solid-phase microextraction of fenitrothion prior its determination by high-performance liquid chromatography equipped with an ultraviolet detector. The MMIP was prepared using functionalized Fe3O4 nanoparticles as the magnetic supporter....

A deep eutectic solvent (DES) of choline chloride and thiourea was synthesised, immobilised on the surface of graphene oxide (GO) nanosheets and reinforced inside the pores of the hollow fibre (DES-GO-HF). Then, solid-phase microextraction flame atomic absorption spectrometry was designed for separation, preconcentration and determination of trace...

A procedure for separation and preconcentration of trace amounts of Zn(II) from aqueous media is proposed. The procedure is based on the adsorption of Zn2+ on octadecyl bonded silica membrane disk modified with N,N’-disalicylidene-1,2-phenylendiamine at pH 7. The retained zinc ions were then stripped from the disk with a minimal amount of 1.5 mol L...

A modified dispersive liquid phase microextraction based on sequential injection solidified floating organic drop was developed for simultaneous separation/preconcentration of trace amounts of phenobarbital and phenytoin. The important factors affecting on the extraction recovery including pH, the volume of extraction solvent, ionic strength and th...

A selective, simple and fast dispersive micro solid phase extraction method using magnetic graphene oxide (GO) as an efficient sorbent has been developed for the extraction, separation and speciation analysis of chromium ions. The method is based on different adsorption behaviour of Cr(VI) and Cr(III) species onto magnetic GO in aqueous solutions w...

This study describes the successful sequential modification of multi-walled carbon nanotube (MWCNT) by Fe3O4 magnetic nanoparticles and 2-mercaptobenzothiazole (MBT) followed by its application as a novel sorbent for simultaneous magnetic solid phase microextraction of lead and cadmium. Fourier transform infrared spectroscopy and scanning electron...

A novel Zn(II) imprinted polymer was synthesized via a co-precipitation method using graphene oxide/magnetic chitosan nanocomposite as supporting material. The synthesized imprinted polymer was characterized by Fourier transform infrared spectrometry (FTIR) and scanning electron microscopy (SEM) and applied as a sorbent for selective magnetic solid...

A novel and efficient sulfadiazine imprinted polymer was synthesized via co-precipitation method and successfully grafted on magnetic multi-walled carbon nanotubes. The synthesized magnetic imprinted polymer was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction analysis, thermal analysi...

A simple, sensitive and reliable method has been developed for separation and preconcentration of chromium (VI) from aqueous samples before determination by electrothermal atomic absorption spectrometry. The method is based on the extraction of the hydrophobic complex of chromium (VI) with ammonium pyrrolidine dithiocarbamate in the coacervates mad...

Deep eutectic solvent (DES) was used as the extractant to improve the extraction properties of cotton. DES of choline chloride-urea (ChCl-urea) was prepared and immobilized on the surface of cotton fibers. The resulting sorbent was packed on a microcolumn, and a flow injection flame atomic absorption spectrometry was designed for the online separat...

A highly selective and sensitive colorimetric sensor for the determination of naproxen (NAP) based on the aggregation of the thiolated β-cyclodextrin (Tβ-CD) functionalized gold nanoparticles (Tβ-CD-Au NPs) in the presence of NAP and Zn(2+)is described. The hydrophobic end of NAP interacts with the immobilized Tβ-CD on the Au NPs and forms the comp...

A novel magnetic mesoporous silica material was synthesized and used as the sorbent for the magnetic solid-phase microextraction of diazinon and malathion before their quantification by high-performance liquid chromatography with UV detection. The sorbent was synthesized by a surfactant-templated one-pot sol-gel procedure using SiO2 -coated Fe3 O4...

In the current research, the sulfonated metal–organic framework loaded on iron oxide nanoparticles, Fe3O4 @MIL-100(Fe)-OSO3H, has been synthesized and utilized as a Fenton-like catalyst for the decolorization of aqueous solutions containing methyl orange (MO) dye as a model organic pollutant. The morphology and structure of the catalyst were charac...

A vortex-assisted dispersive liquid–liquid microextraction method in combination with UV–Vis spectrophotometry was developed for the simultaneous extraction and determination of iron species. In this method, Fe²⁺ and Fe³⁺ were complexed with pyridine-2-amidoxime, neutralized through ion pair formation with sodium dodecyl sulfate, and extracted into...

This study presents a novel, simple and efficient pseudo-stir bar solid phase microextraction method for separation and preconcentration of sulfadiazine. To develop the method, a graphene oxide-silica composite reinforced hollow fiber was prepared via sol-gel technology and used as a novel device to extract sulfadiazine. The retained sulfadiazine w...

A simple and highly sensitive method based on hollow fiber liquid phase microextraction combined with high-performance liquid chromatography and fluorescence detection has been developed for simultaneous separation, preconcentration, and determination of naproxen and nabumetone from water, wastewater, milk, and biological samples. Parameters affect...

A dispersive solid phase extraction method based on ferrofluid has been proposed for the separation and preconcentration of thallium (I) before its determination by flame atomic absorption spectrometry. The ferrofluid was rapidly injected into the aqueous sample containing the thallium (I) and dibenzo-18-crown-6 (DB18C6) as the chelating agent with...

A novel molecular imprinted polymer (MIP) as a SPE sorbent was synthesized for fluoxetine through a coprecipitation method. The synthesized polymer was characterized by Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The kinetic and adsorption equilibrium was studied. Quantification of fluoxetine was done bas...

A sulfonated metal organic framework loaded onto iron oxide nanoparticles (Fe3O4@MOF-235(Fe)-OSO3H) was used as a new sorbent and a magnetic solid phase extraction (MSPE) method was developed for the separation and preconcentration of cadmium prior to its determination by flame atomic absorption spectrometry. The Fe3O4@MOF-235(Fe)-OSO3H composite w...

A magnetic molecularly imprinted polymer (MMIP) was successfully synthesized and applied as the sorbent in the magnetic dispersive solid-phase microextraction (MDSPME) to separate and preconcentrate diazinon from real samples prior to its determination by high-performance liquid chromatography with ultraviolet detector (HPLC-UV). The MMIP was prepa...

A highly selective and sensitive colorimetric sensor for the determination of nabumetone (NAB) based on the aggregation of the thiolated β-cyclodextrin (Tβ-CD) functionalized gold nanoparticles (Au-NPs) with NAB in the presence of polyvinylpyrrolidone (PVP) was developed. Thiolated β-cyclodextrin bonds to the surface of Au-NPs and forms a complex w...

In this work, a simple flow injection system incorporating a microcolumn of immobilized dithizone on bentonite coated with cetyltrimethylammonium bromide was combined with flame atomic absorption spectrometry (FAAS) for on-line separation/preconcentration and determination of trace amounts of silver in water. Dithizone was physically immobilized on...

Over the past several decades, much progress has been made in the development of ion-imprinted polymers (IIPs) with the aid of novel types of tailored polymeric materials (e.g., nanomaterials and hybrid materials). Because of such efforts, IIPs are now widely employed as advanced analytical tools in a variety of sectors (e.g., as sorbents for solid...

Metal–organic framework sorbents [MIL-100(Fe), MOF-235(Fe)], Fe3O4 nanoparticles and metal–organic framework loaded on iron oxide nanoparticles [Fe3O4@MIL-100(Fe) and Fe3O4@MOF-235(Fe)] were prepared and examined for ciprofloxacin (CIP) removal. The results showed that sorption kinetics of CIP by Fe3O4@MIL-100(Fe) follows the Elovich and pseudo-sec...

A syringe to syringe dispersive liquid phase microextraction-solidified floating organic drop was introduced and used for the simultaneous extraction of trace amounts of albendazole and triclabendazole from different matrices. The extracted analytes were determined by high performance liquid chromatography along with fluorescence detection. The ana...

A novel, simple and rapid vortex-assisted hollow-fiber liquid-phase microextraction method was developed for the simultaneous extraction of albendazole and triclabendazole from various matrices before their determination by high-performance liquid chromatography with fluorescence detection. Several factors influencing the microextraction efficiency...

In this work, a fast, easy and efficient dispersive liquid-liquid microextraction method based on solidification of floating organic drop followed by high-performance liquid chromatography with UV detection was developed for the separation/preconcentration and determination of the drug valsartan. Experimental design was applied for the optimization...

A vanadium ion imprinted polymer was synthesized in the presence of V(V) and N-benzoyl-N-phenyl hydroxyl amine using 4-vinyl pyridine as the monomer, ethylene glycol dimethacrylate as the cross linker and 2,2'-azobis(isobutyronitrile) as the initiator. The imprinted V(V) ions were completely removed by leaching the polymer with 5 mol L(-1) nitric a...

A simple, rapid and eco-friendly deep eutectic solvent-modified magnetic nanoparticles extraction method has been reported for ligand-less separation/preconcentration of lead(II) and cadmium(II) for the first time. The metal ions interact with the deep eutectic solvent adhering to the magnetic nanoparticles. Trapped analytes can be easily desorbed...