Nanoadsorbents: Classification, Preparation, and Applications (with Emphasis on Aqueous Media)

Khajeh, Mostafa; Laurent, Sophie; Dastafkan, Kamran

doi:10.1021/cr400086v

Cited by 461 publications

(192 citation statements)

References 542 publications

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“…The last decades have seen an unprecedented progress in the synthesis and applications of nanoparticles with distinct functionalities [14][15][16][17][18]. In particular, recent developments in nanomaterial science and environmental nanotechnology have provided new sorbents for water trace pollutants via magnetic separation [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

SERS Detection of Penicillin G Using Magnetite Decorated with Gold Nanoparticles

2017

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Sensitive and reliable procedures for detecting vestigial antibiotics are of great relevance for water quality monitoring due to the occurrence of such emergent pollutants in the aquatic environment. As such, we describe here research concerning the use of multifunctional nanomaterials combining magnetic and plasmonic components. These nanomaterials have been prepared by decorating magnetite nanoparticles (MNP) with colloidal gold nanoparticles (Au NPs) of distinct particle size distributions. Several analytical conditions were investigated in order to optimize the surface enhanced Raman scattering (SERS) detection of penicillin G (PG) dissolved in water. In particular, the dependence of the SERS signal by using distinct sized Au NPs adsorbed at the MNP was investigated. Additionally, microscopic methods, including Raman confocal microscopy, were employed to characterize the SERS substrates and then to qualitatively detect penicillin G using such substrates. For example, magnetic-plasmonic nanocomposites can be employed for magnetically concentrate analyte molecules and their removal from solution. As a proof of concept, we applied magneto-plasmonic nanosorbents in the removal of aqueous penicillin G and demonstrate the possibility of SERS sensing this antibiotic.

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Section: Introductionmentioning

confidence: 99%

SERS Detection of Penicillin G Using Magnetite Decorated with Gold Nanoparticles

2017

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“…Those above-mentioned systems enhance the sensitivity and also selectivity of the determination techniques. Also, in the past two decades, nanosized materials have been synthesized and used for a wide scope of scientific studies and elicited great interest because of their unique physical and chemical characteristics [28]. The surface atoms are unsaturated and have high chemical activity and adsorption capacity to different substances [29].…”

Section: Introductionmentioning

confidence: 99%

Immobilization of the Thenoyltrifluoroacetone on Sodium Dodecyl Sulfate Modified Magnetite Nanoparticles for Magnetic Solid Phase Extraction of Pb (II) from Water Samples

Sadeghi¹,

Yekta²,

Babanezhad³

2016

Korean Chemical Engineering Research

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− Magnetite nanoparticles (Fe 3 O 4 NPs) were synthesized by co-precipitating method under optimized condition. The Fe 3 O 4 NPs coated with sodium dodecyl sulfate-thenoyltrifluoroacetone (Fe 3 O 4 NPs-SDS-TTFA) were then exerted as the magnetic solid phase extraction (MSPE) adsorbent for the extraction process prior to introducing to a flame atomic adsorption spectrometry (FAAS). The synthesized Fe 3 O 4 NPs-SDS-TTFA were applied for the extraction of Pb(II) ions from different water samples. The characterization studies of nanoparticles were performed via scanning electron microscopy-energy dispersive micro-analysis (SEM-EDAX), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) techniques. The substantial parameters affecting the extraction efficiency were surveyed and optimized. A dynamic linear range (DLR) of 10-400 µg L -1 was obtained and the limit of detection (LOD, n=7) and relative standard deviation (RSD%, n= 6, C=20 µg L -1) were found to be 2.3 µg L -1 and 1.9%, respectively. According to the results, the proposed method successfully applied for the extraction of Pb(II) ions from different environmental water samples and satisfactory results achieved.

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“…As for zeolites, adsorption of toxic agents followed by degradation reaction performs thoroughly due to high adsorption capacity provided by both intrinsic porous structure of aluminumsilicate network and external functionalization with a potential catalytic reactive cation. Individually, intrinsic compositions, apparent sizes and extrinsic surface structures of nanoparticles direct a number of factors that enhance the selectivity and sensitivity of the method, namely high surface area, active Bronsted and Lewis sorption sites and chemical activity with which the adsorption and subsequent catalytic degradation may proceed (Yang et al 2006;Khajeh et al 2013). The combination of zeolites and nanomaterials causes solid catalysts in which the high surface area of nanomaterials and the adsorbent capacity provided by zeolites cooperate to increase the efficiency of the catalytic process (Khatamian et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst for the decontamination reactions of O, S-diethyl methyl phosphonothiolate

Dastafkan

Sadeghi

Obeydavi

2014

Int. J. Environ. Sci. Technol.

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The decontamination reactions of O,S-diethyl methyl phosphonothiolate, as an agricultural organophosphorous pesticide onto 20 wt% loaded manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst in different solvents, were evaluated and monitored by means of gas chromatography-flame ionization detector and gas chromatography-mass spectrometry. Prior to the reaction, the catalyst was synthesized in three steps: at first, sodium-Y zeolite was prepared by hydrothermal method; then, silver-Y zeolite was prepared from sodium-Y zeolite using ion exchange procedure; and finally, manganese dioxide nanoparticles were synthesized by in situ impregnation method by pouring the pre-prepared silver-Y zeolite into manganese(II) nitrate solution and loaded as 20 wt% onto silver-Y zeolite structure. The formation of the synthesized units and final nanocomposite catalyst was verified through scanning electron microscopy, X-ray diffraction, atomic absorption spectrometry and Fourier transform-infrared spectroscopy techniques. Gas chromatography chromatograms showed that O,S-diethyl methyl phosphonothiolate was decontaminated perfectly by the catalyst in n-heptane solvent after 8 h, at room temperature, while chloroform and isopropanol solvents and other reaction times gave lower decontamination results. Moreover, gas chromatography-mass spectrometry chromatograms confirmed the formation of ethyl methyl phosphonic acid as a major and final product, which exemplifies the role of hydrolysis reaction during the degradation progress.

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Nanoadsorbents: Classification, Preparation, and Applications (with Emphasis on Aqueous Media)

Abstract: CONTENTS 7757 4.8. Quantitative Capacity 7757 4.9. Online/Offline Recycling of the Nanoadsorbents 7757 5. Conclusion and Outlook 7757 Author Information 7758 Corresponding Author 7758 Notes 7758 Biographies 7758 Abbreviations 7759 References 7760

Cited by 461 publications

References 542 publications

SERS Detection of Penicillin G Using Magnetite Decorated with Gold Nanoparticles

SERS Detection of Penicillin G Using Magnetite Decorated with Gold Nanoparticles

Immobilization of the Thenoyltrifluoroacetone on Sodium Dodecyl Sulfate Modified Magnetite Nanoparticles for Magnetic Solid Phase Extraction of Pb (II) from Water Samples

Manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst for the decontamination reactions of O, S-diethyl methyl phosphonothiolate

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