Farzaneh Shemirani

University of Tehran | UT ·  School of Chemistry

An important and sought-after goal in wastewater treatment is to develop photocatalysts that can effectively eliminate emerging contaminants while remaining environmentally sustainable. Semiconductor-based photocatalysis presents a promising solution for wastewater purification, offering advantages such as safety, efficiency, and cost-effectiveness...

To meet the needs of developing efficient extractive materials alongside the evolution of miniaturized sorbent–based sample preparation techniques, a mesoporous structure of g-C3N4 doped with sulfur as a heteroatom was achieved utilizing a bubble template approach while avoiding the severe conditions of other methods. In an effort to increase the n...

Drug contamination is one of the most dangerous categories of impurities, which can be mitigated by photocatalysis reaction. Despite the unignorable advantage of nanophotocatalyst, their separation from batch reaction is challenging. Herein, a developed equipment is presented based on immobilizing a nanocatalyst onto the surface of a non-soluble po...

Developing multifunctional catalysts for efficient pollutant degradation in dark and visible light conditions represents a significant advancement in water remediation technology. This study reports the synthesis of a novel Fe3O4/ZnO/Lys-rGO nanocomposite via environmentally friendly methods that exhibit catalytic-photocatalytic activity for effici...

A new analytical method combining magnetic micro‐solid phase extraction (μ‐SPE) in tandem with high‐performance liquid chromatography‐ultraviolet (HPLC‐UV) analysis was developed and used for the simultaneous extraction/preconcentration of tetracycline (TC) and oxytetracycline (OTC) residues in drug manufacturing effluents. The μ‐SPE conducted by t...

With a view to improving applicability as a sorbent while overcoming the challenges associated with its powdery nature, cobalt-doped zeolitic imidazolate framework (ZIF 67)–derived nanoporous carbon (Co-NPC) was employed as an additive in nanofiber through the process of electrospinning. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) s...

In this work, gold nanoparticles coated with polyvinylpyrrolidone (PVP-AuNPs) were used as a colorimetric probe for the sensitive, selective, simple, and rapid determination of atenolol (ATN). Indeed, atenolol triggered the aggregation of PVP-AuNPs via hydrogen bonding, electrostatic interactions, and dipole-dipole forces with PVP on the surface of...

This article investigates the effect of adding HMIMBF4 (HM) to remove high amount of Cd2+ ions. Magnetic carbon nanotube (mCNT) was used as the main part of the adsorbent, and a Schiff base kind of N,N′-bis(salicylidene)ethylenediamine (ES) was applied to increase the selectivity of the method toward Cd2+ ions. X-ray diffraction patterns, Fourier-t...

This article investigates the photocatalytic performance of a nanocomposite, consisting of two nanocore-shell-nanoparticles, kind of Fe3O4@SiO2 and WO3@TiO2, to degrade methylene blue (MB). The materials were prepared using environmentally-friendly reagents through energy efficient methods, without consumption of any dangerous solvents. The charact...

Correction for ‘Fabrication of a reusable magnetic multi-walled carbon nanotube–TiO 2 nanocomposite by electrostatic adsorption: enhanced photodegradation of malachite green’ by Ghazale Daneshvar Tarigh et al. , RSC Adv. , 2015, 5 , 35070–35079, https://doi.org/10.1039/C4RA15593A.

Mercury thrown even at low concentrations in water resources causes a severe threat to the ecosystem hence the presented work describes a low-cost and environmentally friendly clean-up platform for decontamination of water in terms of mercury ions. For this purpose, MgFe2O4—Gum Arabic composite was prepared with a simple ultrasound-assisted precipi...

Mercury thrown even at a low concentrations in water resources causes a severe threat to ecosystem hence the presented work describes a low cost and environmentally friendly clean up platform for decontamination of water in terms of mercury ions. For this purpose MgFe2O4 – Gum Arabic composite was prepared with a simple ultrasound assisted precipit...

A magnetic solid phase extraction method is presented to preconcentrate Pb(II), Cd(II), Ni(II) and Zn(II) simultaneously. The adsorbent (mMoS2-CS), consisting of Fe3O4, MoS2 and chitosan (CS), was prepared facile and fast with consumption of environmentally friendly materials. X-ray diffraction shows pure crystallinity of the products. The morpholo...

This article investigates the applicability of an environmentally friendly and energy efficient deep eutectic solvents (DES) for indigotin blue dye (IBD) preconcentration prior to its quantification by a UV–Visible spectrophotometer. The adsorbent (UT-mGO) is made of Fe3O4, graphene oxide, urea and tetramethylammonium chloride. It was prepared via...

In this study, an alternative application of supported liquid membranes (SLMs) containing specific ion carriers dissolved in supra molecular solvent (SUPRA) to the selective and simultaneous separation of Ag+ and Pb2+ ions from a dilute source solution is introduced. A two-membrane three-compartment cell was used. Two micro-porous polypropylene sup...

This article presents an ultrasound-assisted dispersive magnetic solid-phase extraction method (USA-DMSPE) to preconcentration Cd(II) and Pb(II) simultaneously. The adsorbent (mGO-βCD) was synthesized through three steps with consumption of environmentally friendly materials at room temperature. First graphene oxide (GO) was prepared via modified H...

This article describes an efficient method to preconcentrate Acid Brown-14 (AB-14) prior to its quantification by UV–Vis spectroscopy. A three-component nanocomposite (mCC) consisting of Fe3O4, carbon nanotube and CeO was synthesized in room temperature with environmentally-friendly materials. The characterization of materials was conducted accordi...

The application of spinel ferrite decorated graphene hybrids in heat transfer has been limited mostly due to their poor stability in water. This study reports a straightforward strategy to synthesis a cobalt ferrite/reduced graphene oxide (CoFe2O4/rGO) nanocomposite with high water dispersibility characteristics through the treatment of synthesized...

The advancement of smart materials has substantially affected the sample preparation techniques. Recently, different smart materials like carbon‐based materials, magnetic nanoparticles, and ferrofluids have been used to separate analytes from different matrices. Among these, ferrofluids have attracted considerable attention due to their liquidity a...

Nanobeads (NB) are microparticles that have high surface area as a novel adsorbent for removal Heavy metals with micro size that made them promising for easily seprating from aquous media. The present study describes the successful fabrication of bio-polymeric nanocomposite bead (NB) of alginate caged magnetic graphene oxide (Alg-MGO). NB was obtai...

A new class of polymeric sorbents based on deep eutectic solvents (DESs) is introduced. These materials are obtained from simple and inexpensive precursors via an energy-efficient process. The primary benefit of these sorbents is that they possess the unique characteristics of DESs and porous materials simultaneously. Moreover, the possibility of t...

A highly efficient magnetic adsorbent is presented to preconcentrate acid violet-7 (AV-7) prior quantifying by UV–visible spectroscopy (λmax = 520 nm). The adsorbent consisting of MnO2 and Fe3O4 was synthesized via precipitation method. The green preparation method was simple and fast; it was performed at room temperature, without consuming organic...

In this research, hydrophobic task-specific room temperature ionic liquid (HTSRTIL) as a green modifier was synthesised and electrostatically in-situ immobilised on the magnetic multi-wall carbon nanotube (MMWCNT). This green reusable nano sorbent was employed successfully for the speciation/extraction of chromium species. The adsorbent was charact...

In this article, a highly efficient method based on coupling magnetic solid-phase extraction and dispersive microsolid-phase extraction was proposed to preconcentrate Hg2+. In this technique, extraction of Hg2+ was carried out by magnetic graphene-based bucky gel (MGBG). MGBG was prepared by dispersing magnetic graphene (MG) in a [Hmim][BF4]. Utili...

BACKGROUND Heavy metal contamination in water and agricultural products is a major concern that causes risks for human health. This article describes a highly selective approach to preconcentrate cobalt(II) (Co(II)) ions based on the standard UV–visible measurement of Co(II)–1‐(2‐pyridylazo)‐2‐naphthol complex at λ = 628 nm in water and nut samples...

“Tryptophan-coated blue fluorescent copper nanocluster (CuNC@Trp) was prepared by a strategy where Trp acts as both the reducing and capping agent. The fluorescence of the CuNC, with excitation/emission peaks at 340/405 nm, is selectively quenched by iron(II) and iron(III) ions. Studying the mechanism of this interaction revealed that Fe²⁺ and Fe³⁺...

This article describes a method for highly selective preconcentration of Cd(II) via magnetic Mn2O3 coated by N,N′-bis(salicylidene)ethylenediamine (BSED). The metal oxide components were prepared via combining sol-gel and precipitation methods. Then, BSED was added as the third component of the composite. X-ray diffraction, scanning electron micros...

Ionic liquids (ILs) are a class of fluids with unique physicochemical properties employing polymeric substances emerging new materials. Solidification of ILs into porous materials generates porous ionic liquid polymers that combine the unique characteristics of ILs with common porous materials and polymers. In this study, it’s the first time the po...

In this work, a highly selective method is presented for the preconcentration of cadmium. The developed magnetic solid-phase extraction is based on the adsorption of Cd(II)-N,N′-bis(salicylidene)ethylenediamine (BSE) complex on Fe3O4-embedded graphene oxide nanocomposite. The N,N′-bis(salicylidene)ethylenediamine ligand was used prior to extraction...

In this work, a green quaternized nanohybrid was selected to enhance naproxen removal from aqueous solution hence magnetic dextrin was synthesized by a simple one-step precipitation route and modified by covalently binding tributylamine on its surface. The nanohybrid was characterized with energy dispersive X-ray spectroscopy, X-ray diffraction, fi...

In this work, a new magnetic nanocomposite was prepared for the specific isolation of CD45 positive cells. Acrolein (AC) and acrylated-β-cyclodextrin (ACD) were used as monomers in order to polymerize on the surface of Fe3O4 magnetic nanoparticles (MNPs) via surface initiated radical polymerization. Polyacrolein-β-CD (PACD) functionalized Fe3O4 MNP...

This article focuses on adsorption and desorption of Pb ²⁺ on a novel adsorbent consisting of Mn 2 O 3 and Fe 3 O 4 . The adsorbent was prepared through combining Sol-Gel and precipitation methods to in-situ magnetization. Decreasing preparation time, synthesizing at room temperature, not using organic solvents are advantages of the presented appro...

The present study describes the successful fabrication of bio-polymeric nanocomposite bead (NCB) of alginate caged magnetic graphene oxide (Alg-MGO). NCB was obtained by crosslinking of sodium alginate and calcium ions in the presence of MGO. Analytical techniques Fourier transform infra-red (FT-IR), field emission scanning electron microscope (SEM...

A graphene based bucky gel-coated stainless steel fiber was prepared and applied to headspace solid phase microextraction of volatile organic compounds. Graphene was mixed with an ionic liquid to produce a bucky gel that displays the attractive features of both compounds. It can be directly deposited on an etched stainless steel wire to give the fi...

A novel sorbent consisting of WO3 and Fe3O4 is described for preconcentration of Pb(II). It was prepared without consumption of organic solvents. The nano composite was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, alternating gradient force magnetometer and Brunauer-Emmett-Teller. Having high s...

In this work, we evaluated the applicability of hydrophobic carboxylic acid-based deep eutectic solvents (DESs) as environmentally friendly alternatives to common organic solvents in microextraction methods based on solidification of floating drop (SFD). Due to the limited number of solvents that can be used in SFD, the introduction of new solvents...

Polymeric compounds are main types of advanced materials to prepare antibacterial coating as well as water treatment system hence this work was aimed to prepare a polymeric nanostructure with excellent bacteria capture efficiency. Dendronized melamine – resorcinol was synthesized by a condensation reaction. To simplify polymer collection from aqueo...

In this study, a novel adsorbent from a mesoporous family (MCM-41) coating with CoFe2O4 and piperazine was synthesized by a simple and easy route. Its application for simultaneous preconcentration of three heavy metals including lead, cadmium and copper in real samples followed by a flame atomic absorption spectroscopy was investigated. The central...

There are a large number sulphur functional groups on the surface of MoS2 nano sheets. But, the main problem was its hard collection from aqueous solutions owing to relatively high dispersibility in the media. Fabrication of hybrid from MoS2 can solve this defect. MoS2 nano sheets were synthesised on surfaces of MWCNT with the hydrothermal method a...

Magnetic MnFe2O4 and CuFe2O4 - 2- aminobenzoic acid – phenylenediamine nanocomposite was prepared using the catalytic activity of the magnetic ferrites as an efficient oxidizer. Antimicrobial activity of nanocomposite has been studied by capturing of Bacillus subtilis as sample pathogenic contaminant. Moreover, the nanocomposite was applied for sel...

Recently, MoS2 with abundant electron density in its structure attracted more attention as an adsorbent for environmental remediation. However, hard manipulation of target solution owing to high dispersibility in aqueous media restricts its application as adsorbent. Preparation of Fe3O4/MoS2 nanohybrid can solve this problem. Also, this nanohybrid...

Non-modified molybdenum disulfide (MoS2) is known to adsorb various compounds. However, in case of very small particle sizes and high dispersibility, ordinary centrifugation and filtration fail to separate MoS2 from aqueous media limiting, its applicability to solid-phase extraction. To overcome this shortcoming, we have prepared a nanohybrid consi...

A facile headspace single drop microextraction method was developed using deep eutectic solvent based magnetic bucky gel as the extraction solvent for the first time. The hydrophobic magnetic bucky gel was formed by combining choline chloride/chlorophenol deep eutectic solvent and magnetic multi-walled carbon nanotube nanocomposite. Magnetic suscep...

In this research an efficient ionic liquid based ferrofluid system was developed for efficient adsorption/preconcentration of cadmium using magnetic mesoporous carbon – chitosan nanohybrid. Mesoporous CMK - 3 was synthesized using MCM – 48 as ordered template. Then magnetic CMK was combined with chitosan through reaction with epichlorohydrin. The n...

In this research, performance of different carbon structures including multiwalled carbon nanotubes (MWNT), single walled carbon nanotubes (SWNT), carbon nanofibers (CNF), nano carbon (NC), nanoporous graphene (G) and mesoporous carbon (CMK) was studied as sorbents for removal of 4-chlorophenol (4-CP) from water. Nanostructures were synthesized and...

This study suggested a new method for simultaneous quantification of two dyes in complex matrices using second-order data by spectrophotometry. Second-order data was generated simply without any expensive instrument using two independent variables including wavelength and the monotonic addition of sodium dodecyl sulfate. Solid-phase extraction (SPE...

In this work, we developed dispersive solid-phase extraction method with the use of carbon nanotube based magnetic bucky gels. The hydrophilic carbon nanotube (CNT)-based magnetic bucky gels (M-BGs) were developed with the features of magnetic susceptibility to permit fast injection of sorbent, rapid retrieval of the sorbent and high dispersion of...

In the present study, to extract the residue of seven pesticides (diazinon, chlorpyrifos, ethion, permethrine, cypermethrin, fenvalerate RR and fenvalerate SS) from raisin samples, reduced graphene oxide—Fe3O4 magnetic nanocomposite is applied as an adsorbent and then the preconcentrated pesticides were determined by GC–MS. The application of high...

This article describes a useful sorbent for separation and preconcentration of trace amounts of gold(III), palladium(II) and silver(I) ions. Graphene oxide (GO) nanoparticles were synthesized by a modified Hummers method and magnetized by MnFe2O4 nanoparticles to give a sorbent referred to as mag-GO. Addition of sodium dodecyl sulfate creates admic...

Magnetic Fe3O4 nanoparticles were synthesized by a coprecipitation method, then their surface was covered and modified by [1-(2-aminoethyl)-3-aminopropyl]trimethoxysilane. The resulting adsorbent was used in preconcentration of Co(ΙΙ) ions prior to their determination by flame atomic absorption spectroscopy. The modified nanoparticles were characte...

This research focuses on the development of a fast ultrasonic assisted ferrofluid mediated methodology to obtain the optimum conditions for silver adsorption from aqueous solutions. For this purpose magnesium ferrite-copper sulfide chalcogenide was synthesized and employed as an efficient nanosorbent. The sorbent was characterized with energy-dispe...

The authors describe the synthesis of a multifunctional nanocomposite with an architecture of type Fe3O4@SiO2@graphene quantum dots with an average diameter of about 22 nm. The graphene quantum dots (GQDs) were covalently immobilized on the surface of silica-coated magnetite nanospheres via covalent linkage to surface amino groups. The nanocomposit...

Novel deep eutectic solvent (DES) magnetic bucky gels (MBG) were formed by choline chloride/urea deep eutectic solvent and magnetic multi-walled carbon nanotube nanocomposite (MMWCNT) and were used in developing dispersive solid-phase extraction (dSPE) method. The hydrophilic DES based MBGs were developed with the features of magnetic susceptibilit...

In this work, amine riched MnFe2O4-cellulose was employed to remove toxic Cr (VI). To find out the optimum conditions R (3.3.1) software was used. The results of Cr (VI) adsorption onto three-step adsorbents were compared by interpreting kinetic and isotherm studies. The kinetic studies reveal that the adsorption of Cr (VI) onto cellulose and magne...

Focus of this research is on employment of a green route to prepare magnetic CuFe2O4@polysaccharide resin for environmental remediation purpose. The method is including solvent free solid state synthesis of copper ferrite nanoparticles by combustion route using cellulose as fuel. Then polysaccharide resin as well as its magnetic composite was prepa...

Molybdenum disulfide (MoS2) is a layered material with unique two-dimensional structure which has abundant electron density on edges and surfaces. These adsorption sites could interact with polycyclic aromatic compounds by π–π stacking. Therefore, MoS2 nanosheets will no longer be modified or functionalized. In this study, MoS2 nanosheets were prep...

In the present work, synthesis of polymer wrapped flower-like MgAl layered double hydroxide was done through condensation of 1,4 phenylenediamine and resorcinol by p-formaldehyde. The nanocomposite was characterised with X-ray diffraction analysis, fourier transform infrared spectroscopy, thermogravimetric analysis and field emission scanning elect...

Non-modified molybdenum disulfide (MoS2) is known to adsorb heavy metal ions. However, in case of very small particle sizes and high dispersibility, ordinary centrifugation and filtration fail to separate MoS2 from aqueous media, and this limits its applicability to solid-phase extraction. To overcome this shortcoming, the authors have prepared a n...

Recently, molybdenum disulfide has been attracted considerable attention due to its unique three layered structure. Adsorption sites with abundant electron density on edges and surfaces of MoS2 can adsorb different metal ions with no need to ligand and functionalization. In this study, dahlia-like MoS2 nanosheets were prepared by a simple hydrother...

In the present work, titanium dioxide nanowires (TNWs) were synthesised via hydrothermal method. Insertion of ZnFe2O4 nanoparticles to the surface of TNWs was done by sol gel combustion synthesis of the nanoparticles in the presence of the nanowires. The surface of prepared magnetic TNWs was modified by p-phenylendiamine and then it was used in pre...

Polymeric ionomers with anion exchange capability are considered to be classes of environmentally friendly compounds as combination of them with anionic layered hydroxides constitute emerging advance materials. Biosorption by polymeric ionomer − layered double hydroxide (LDH) hybrid material exhibits an attractive green, low cost and low toxic − cl...

Polylysine − resorcinol coated alumina nanotube has been synthesized based on Mannich reaction. Synthetic polymer has been obtained using lysine and resorcinol as monomer and p − formaldehyde as linker by condensation reaction. The nanosorbent was employed for cadmium adsorption from aqueous samples. Effective parameters on sorption process have be...

Different approaches such as precipitation, combustion, and hydrothermal method are available to prepare Fe3O4 nanoparticles. Respect to other methods, precipitation, especially with one iron source and natural reducing agents is a more green, economic, fast, and simple route for Fe3O4 synthesis. Based on these viewpoints, we have prepared Fe3O4 ma...

Ionic liquids are considered to be a class of environmentally friendly compounds as combination of them with bioresource polymeric substances such as; cellulose, constitute emerging coating materials. Biosorption by polymeric ionic liquids exhibits an attractive green way that involves low cost and irrespective of toxicity. As a result, a novel pol...

A simple and efficient approach for preparing modified magnetic multi-walled carbon nanotubes (MMWCNT) with 8-hydroxyquinoline was developed. This short-cut method has reduced the contact time of modification from 2 days to 10 hours. The properties of MMWCNT modified 8-hydroxyquinoline were characterised by scanning electron microscopy (SEM), vibra...

The authors describe the synthesis of core-shell structured Fe3O4@graphene oxide nanospheres (denoted as Fe3O4@GO NSs) via a chemical (covalent) bonding method. A chemical method was applied to cutting graphene oxide flakes into GO nanosheets. These were then covalently immobilized onto the surface of magnetite (Fe3O4) nanoparticles. The material w...

Here in we report preparation of MnFe2O4 and magnetic takovite – aluminosilicate adsorbent via precipitation methodology. The synthesized nanocomposite was applied in preconcentration of Pb2+ ions from various matrices. The structural, surface, and magnetic characteristics of the adsorbent were investigated by XRD, EDX, FE-SEM, and VSM techniques....

In this research, magnetic BaFe2O4 nanoparticles (NPs) have been synthesized via the sol-combustion process using triethanolamine as fuel. Thereinafter, the silica coated NPs have been reacted with carbon disulfide and melamine to prepare magnetic polytriazine-thiourea dendronized nanohybrid. Prepared materials have been characterized by XRD, FT-IR...

A novel, bio-based 8-hydroxyquinoline (8–HQ) anchored magnetic chitosan using Co(II) as imprinted ions was prepared and applied for selective removal of Co(II) from aqueous solutions. At first, γ − Fe2O3 has been synthesized by solvent free precipitation route and then combined with 8-hydroxyquinoline anchored chitosan using epichlorohydrin (EPH) a...

In this research, a new derivative of core--shell magnetic chitosan biopolymer was prepared. The core magnetic Fe3O4 nanoparticles were synthesized by a simple and fast sonochemistry route within 10 min. Fe3+ ions and sodium thiosulfate were used as the iron source and reducing agent, respectively. Then shell chitosan grafted with 5-acrylamido-1,10...

A magnetic Fe3O4@CuS nanohybrid has been successfully prepared by a rapid polyol route. The synthetic procedure includes refluxing a mixture of Fe3O4, CuSO4 and sodium thiosulfate in ethylene glycol at 150 °C for 90 min. The prepared composite has been characterized using XRD, VSM, FE – SEM and Raman techniques. Gold adsorption properties of the na...

A novel magnetic alunite@MnFe2O4 nanocomposite has been synthesized by one-step refluxing coprecipitation method. XRD, SEM, VSM, and FT-IR techniques were carried out to characterize calcined alunite as well as the prepared nanocomposite. The synthetic process is facial, simple, and fast. Moreover, as-synthesized nanocomposite bears compelling feat...