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Hagarová I, Nemček L. Application of Metallic Nanoparticles and Their Hybrids as Innovative Sorbents for Separation and Pre-concentration of Trace Elements by Dispersive Micro-Solid Phase Extraction: A Minireview. Front Chem 2021; 9:672755. [PMID: 34017823 PMCID: PMC8129025 DOI: 10.3389/fchem.2021.672755] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/12/2021] [Indexed: 11/13/2022] Open
Abstract
It is indisputable that separation techniques have found their rightful place in current analytical chemistry, considering the growing complexity of analyzed samples and (ultra)trace concentration levels of many studied analytes. Among separation techniques, extraction is one of the most popular ones due to its efficiency, simplicity, low cost and short processing times. Nonetheless, research interests are directed toward the enhancement of performance of these procedures in terms of selectivity. Dispersive solid phase extraction (DSPE) represents a novel alternative to conventional solid phase extraction (SPE) which not only delivers environment-friendly extraction with less solvent consumption, but also significantly improves analytical figures of merit. A miniaturized modification of DSPE, known as dispersive micro-solid phase extraction (DMSPE), is one of the most recent trends and can be applied for the extraction of wide variety of analytes from various liquid matrices. While DSPE procedures generally use sorbents of different origin and sizes, in DMSPE predominantly nanostructured materials are required. The aim of this paper is to provide an overview of recently published original papers on DMSPE procedures in which metallic nanoparticles and hybrid materials containing metallic particles along with other (often carbon-based) constituent(s) at the nanometer level have been utilized for separation and pre-concentration of (ultra)trace elements in liquid samples. The studies included in this review emphasize the great analytical potential of procedures producing reliable results in the analysis of complex liquid matrices, where the detection of target analyte is often complicated by the presence of interfering substances.
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Affiliation(s)
- Ingrid Hagarová
- Institute of Laboratory Research on Geomaterials, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
| | - Lucia Nemček
- Institute of Laboratory Research on Geomaterials, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
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2
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Lian Q, Roy A, Kizilkaya O, Gang DD, Holmes W, Zappi ME, Zhang X, Yao H. Uniform Mesoporous Amorphous Cobalt-Inherent Silicon Oxide as a Highly Active Heterogeneous Catalyst in the Activation of Peroxymonosulfate for Rapid Oxidation of 2,4-Dichlorophenol: The Important Role of Inherent Cobalt in the Catalytic Mechanism. ACS APPLIED MATERIALS & INTERFACES 2020; 12:57190-57206. [PMID: 33291883 DOI: 10.1021/acsami.0c20341] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Amorphous cobalt-inherent silicon oxide (Co-SiOx) was synthesized for the first time and employed as a highly active catalyst in the activation of peroxymonosulfate (PMS) for the rapid oxidation of 2,4-dichlorophenol (2,4-DCP). The characterization results revealed that the 0.15Co-SiOx possessed a high specific surface area of 607.95 m2/g with a uniform mesoporous structure (24.33 nm). The X-ray diffraction patterns indicate that the substituted cobalt atoms enlarge the unit cell parameter of the original SiO2, and the selected area electron diffraction pattern confirmed the amorphous nature of Co-SiOx. More bulk oxygen vacancies (Ov) existing in the Co-SiOx were identified to be one of the primary contributors to the significantly enhanced catalytic activation of PMS. The cobalt substitution both creates and stabilizes the surficial Ov and forms the adequately active Co(II)-Ov pairs which engine the electron transfer process during the catalytic activities. The active Co(II)-Ov pairs weaken the average electronegativity of Co/Si and Co/O sites, resulting in the prevalent changes in final state energy, which is the main driving cause of the binding energy shifts in the X-ray photoelectron spectroscopy (XPS) spectra of Si and O among all samples. The increase of the relative proportion of Co(III) in the spent Co-SiOx probably causes the binding energy shifts of the Co XPS spectrum compared to that of the Co-SiOx. The amorphous Co-SiOx outperforms stable and quick 2,4-DCP degradation, achieving a much higher kinetic rate of 0.7139 min-1 at pH = 7.02 than others via sulfate radical advanced oxidation processes (AOPs), photo-Fenton AOPs, H2O2 reagent AOPs, and other AOP approaches. The efficient degradation performance makes the amorphous Co-SiOx as a promising catalyst in removing 2,4-DCP or organic-rich pollutants.
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Affiliation(s)
- Qiyu Lian
- Department of Civil Engineering, University of Louisiana at Lafayette, P.O. Box 43598, Lafayette, Louisiana 70504, United States
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
| | - Amitava Roy
- The J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD), Baton Rouge, Louisiana 70806, United States
| | - Orhan Kizilkaya
- The J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD), Baton Rouge, Louisiana 70806, United States
| | - Daniel Dianchen Gang
- Department of Civil Engineering, University of Louisiana at Lafayette, P.O. Box 43598, Lafayette, Louisiana 70504, United States
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
| | - William Holmes
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
- Department of Chemical Engineering, University of Louisiana at Lafayette, P.O. Box 43675, Lafayette, Louisiana 70504, United States
| | - Mark E Zappi
- Department of Civil Engineering, University of Louisiana at Lafayette, P.O. Box 43598, Lafayette, Louisiana 70504, United States
- Center for Environmental Technology, The Energy Institute of Louisiana, P.O. Box 43597, Lafayette, Louisiana 70504, United States
- Department of Chemical Engineering, University of Louisiana at Lafayette, P.O. Box 43675, Lafayette, Louisiana 70504, United States
| | - Xu Zhang
- Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, School of Civil Engineering, Beijing Jiaotong University, 3 Shangyuancun, Beijing 100044, P. R. China
| | - Hong Yao
- Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, School of Civil Engineering, Beijing Jiaotong University, 3 Shangyuancun, Beijing 100044, P. R. China
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3
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Ngororabanga JMV, Moyo CB, Tshentu ZR. A novel multidentate pyridyl ligand: A turn-on fluorescent chemosensor for Hg 2+ and its potential application in real sample analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 242:118651. [PMID: 32795949 DOI: 10.1016/j.saa.2020.118651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
A novel pyridyl-based ligand with multiple binding sites was developed as potential turn on fluorescent probe for mercuric ion. In comparison with other transition metal ions, the ligand displayed a significant optical selectivity and sensitivity for Hg2+ in aqueous solution with a remarkable fluorescence enhancement. The obtained spectroscopic response was related to the inhibition of the photo-chemical mechanism known as photo-induced electron transfer (PET) in the ligand and CN isomerization by Hg2+ binding. A good linearity between fluorescence responses and Hg2+ concentration was obtained in the range 3.3 × 10-9 M-1.6 × 10-8 M and a nanomolar level limit of detection (LOD) (1.4 × 10-9 M ~ 0.28 ppb) and limit of quantification (LOQ) (4.8 × 10-9 M ~ 0.93 ppb) were obtained. Both LOD and LOQ values are very low compared to the reported permissible Hg2+ level in drinking water (2 ppb) by US Environmental Protection Agency (EPA). The possible binding mode between ligand and Hg2+ were determined using Job's plot analysis and density functional theory (DFT) calculations and a complex with 1:1 stoichiometric ratio was suggested. The response of the pyridyl ligand upon Hg2+ addition was noted to be fast without any time delay and reversible. The performance of the ligand at nanomolar level of Hg2+ and real sample application of the proposed method was investigated and satisfactory results were obtained.
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Affiliation(s)
| | - Cyprian B Moyo
- Department of Chemistry, Nelson Mandela University, Port Elizabeth 6031, South Africa
| | - Zenixole R Tshentu
- Department of Chemistry, Nelson Mandela University, Port Elizabeth 6031, South Africa.
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Miranda-Andrades JR, Letichevsky S, González Larrudé DR, Aucelio RQ. Photo-generation of mercury cold vapor mediated by graphene quantum dots/TiO 2 nanocomposite: On line time-resolved speciation at ultra-trace levels. Anal Chim Acta 2020; 1127:256-268. [PMID: 32800131 DOI: 10.1016/j.aca.2020.06.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/05/2020] [Accepted: 06/20/2020] [Indexed: 10/23/2022]
Abstract
Mercury speciation was achieved using a nanocomposite, consisting of graphene quantum dots (GQDs) and TiO2 nanoparticles, to mediate photo-degradation of mercurial species into the Hg cold vapor detected by atomic spectrometry. Sample solution (containing Hg2+, CH3CH2Hg, and CH3Hg at hundreds of ng L-1) was placed in quartz tube containing formic acid solution (2% v/v) and microliter aliquot of GQDs/TiO2 nanocomposite dispersion (0.6 mg of nanocomposite). The tube was placed inside a photochemical reactor then, adapted to the mercury-dedicated spectrometer. Quantitative speciation was achieved taking advantage of the differences in UV photodegradation kinetics: Hg2+ (5 min), CH3CH2Hg (9 min) and CH3Hg (13 min). Gas-chromatography cold vapor atomic fluorescence spectrometry was used to confirm the evolution of the reactions over time during photo-reaction. The limits of detection were 10 ng L-1 for CH3CH2Hg and 7 ng L-1 for Hg2+ and CH3Hg.
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Affiliation(s)
- Jarol R Miranda-Andrades
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | - Sonia Letichevsky
- Department of Chemical Engineering and Materials, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | | | - Ricardo Q Aucelio
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil.
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Ngororabanga JMV, Tshentu ZR, Mama N. A New Highly Selective Colorimetric and Fluorometric Coumarin-based Chemosensor for Hg 2. J Fluoresc 2020; 30:985-997. [PMID: 32583123 DOI: 10.1007/s10895-020-02542-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 04/15/2020] [Indexed: 11/30/2022]
Abstract
A novel colorimetric and fluorometric method based on coumarin as signalling unit was developed for Hg2+ recognition and quantification. Initially, the alkyne functionality was incorporated into a coumarin system and the resulting molecule showed higher specificity and sensitivity for Hg2+ over other cations in both absorption and emission sensing assays. The Hg2+ recognition was detected as visible colour change from colourless to yellow and as fluorescence quenching. The colour change was assigned to the increased intramolecular charge transfer (ICT) in the signalling unit upon Hg2+ binding whereas a decline in the fluorescence intensity was ascribed to the heavy atom effect from Hg2+. In order to generate a material with high sensing performance level, alkyne-functionalized molecule was hosted into a polymeric material. The resulting functionalized polymer showed higher sensitivity and selectivity for Hg2+ over its corresponding coumarin molecule. The investigation of the possible binding modes for Hg2+ suggested both alkyne and triazole functionalities as potential binding sites for Hg2+. The limit of detection (LOD) and limit of quantification (LOQ) of the proposed method were evaluated and values less than a recommended maximum level of Hg2+contaminant in drinking water (2.00 μg/L) were obtained (LOD = 0.44 μg/L and LOQ = 1.33μg/L). The real-life application of the method was investigated using natural water samples containing Hg2+ levels equivalent to the maximum tolerable concentration of Hg2+ in drinking water. The outcomes suggested that the method could be used in the sensing and determination of Hg2+ level of contaminant in the environment.
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Affiliation(s)
| | - Zenixole R Tshentu
- Department of Chemistry, Nelson Mandela University, Port Elizabeth, 6031, South Africa
| | - Neliswa Mama
- Department of Chemistry, Nelson Mandela University, Port Elizabeth, 6031, South Africa
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6
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Daware K, Kasture M, Kalubarme R, Shinde R, Patil K, Suzuki N, Terashima C, Gosavi S, Fujishima A. Detection of toxic metal ions Pb2+ in water using SiO2@Au core-shell nanostructures: A simple technique for water quality monitoring. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136635] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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7
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Ngororabanga JMV, Tshentu ZR, Mama N. A highly selective and sensitive ESIPT-based coumarin–triazole polymer for the ratiometric detection of Hg2+. NEW J CHEM 2019. [DOI: 10.1039/c9nj01366k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A reversible ESIPT based system for the detection of Hg2+ was developed. The system exhibited better properties compared to that of recently developed ratiometric fluorescent systems.
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Affiliation(s)
| | | | - Neliswa Mama
- Department of Chemistry
- Nelson Mandela University
- Port Elizabeth
- South Africa
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8
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Lisowski P, Colmenares JC, Mašek O, Lisowski W, Lisovytskiy D, Grzonka J, Kurzydłowski K. Design and Fabrication of TiO2/Lignocellulosic Carbon Materials: Relevance of Low-temperature Sonocrystallization to Photocatalysts Performance. ChemCatChem 2018. [DOI: 10.1002/cctc.201800604] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pawel Lisowski
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Juan Carlos Colmenares
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Ondřej Mašek
- UK Biochar Research Centre, School of Geosciences; University of Edinburgh; Edinburgh United Kingdom
| | - Wojciech Lisowski
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Dmytro Lisovytskiy
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Justyna Grzonka
- Faculty of Materials Science and Engineering; Warsaw University of Technology; Woloska 141 02-507 Warsaw Poland
- Institute of Electronic Materials Technology; Wolczynska 133 01-919 Warsaw Poland
| | - Krzysztof Kurzydłowski
- Faculty of Materials Science and Engineering; Warsaw University of Technology; Woloska 141 02-507 Warsaw Poland
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9
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He M, Huang L, Zhao B, Chen B, Hu B. Advanced functional materials in solid phase extraction for ICP-MS determination of trace elements and their species - A review. Anal Chim Acta 2017; 973:1-24. [DOI: 10.1016/j.aca.2017.03.047] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 03/24/2017] [Accepted: 03/25/2017] [Indexed: 12/17/2022]
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10
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Peng C, He M, Chen B, Huang L, Hu B. Magnetic sulfur-doped porous carbon for preconcentration of trace mercury in environmental water prior to ICP-MS detection. Analyst 2017; 142:4570-4579. [DOI: 10.1039/c7an01195d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel magnetic sulfur-doped porous carbon (MSPC) was fabricated via a simple one-step carbonization of a mixture of sucrose, basic magnesium sulfate whiskers and Fe3O4@SiO2 nanoparticles.
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Affiliation(s)
- Chuyu Peng
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- P R China
| | - Man He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- P R China
| | - Beibei Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- P R China
| | - Lijin Huang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- P R China
| | - Bin Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- P R China
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11
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Nanomaterial-based strategies for enhanced mercury trace analysis in environmental and drinking waters. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.09.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Cai Y, Tan F, Qiao X, Wang W, Chen J, Qiu X. Room-temperature synthesis of silica supported silver nanoparticles in basic ethanol solution and their antibacterial activity. RSC Adv 2016. [DOI: 10.1039/c5ra27053g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A facile and environmentally friendly route was developed to synthesize silica supported silver nanoparticles through the reduction of Ag+ ions in basic ethanol solution without adding any other reducing agents or surfactants at room temperature.
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Affiliation(s)
- Yuncheng Cai
- State Key Laboratory of Material Processing and Die & Mould Technology
- Huazhong University of Science and Technology
- Wuhan
- P. R. China
| | - Fatang Tan
- State Key Laboratory of Material Processing and Die & Mould Technology
- Huazhong University of Science and Technology
- Wuhan
- P. R. China
| | - Xueliang Qiao
- State Key Laboratory of Material Processing and Die & Mould Technology
- Huazhong University of Science and Technology
- Wuhan
- P. R. China
| | - Wei Wang
- State Key Laboratory of Material Processing and Die & Mould Technology
- Huazhong University of Science and Technology
- Wuhan
- P. R. China
| | - Jianguo Chen
- State Key Laboratory of Material Processing and Die & Mould Technology
- Huazhong University of Science and Technology
- Wuhan
- P. R. China
| | - Xiaolin Qiu
- Nanomaterials Research Centre
- Nanchang Institute of Technology
- Nanchang
- P. R. China
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13
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Rahman MM, Younes H, Lu JY, Ni G, Yuan S, Fang NX, Zhang T, Al Ghaferi A. Broadband light absorption by silver nanoparticle decorated silica nanospheres. RSC Adv 2016. [DOI: 10.1039/c6ra24052f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ag NPs decorated SiO2 nanospheres for plasmon enhanced light absorption.
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Affiliation(s)
- Md. Mahfuzur Rahman
- Institute Centre for Energy (iEnergy)
- Mechanical and Materials Engineering Department
- Masdar Institute of Science and Technology (MIST)
- United Arab Emirates
| | - Hammad Younes
- Institute Centre for Energy (iEnergy)
- Mechanical and Materials Engineering Department
- Masdar Institute of Science and Technology (MIST)
- United Arab Emirates
| | - Jin You Lu
- Institute Centre for Energy (iEnergy)
- Mechanical and Materials Engineering Department
- Masdar Institute of Science and Technology (MIST)
- United Arab Emirates
| | - George Ni
- Department of Mechanical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Shaojun Yuan
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China 610065
| | - Nicholas X. Fang
- Department of Mechanical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - TieJun Zhang
- Institute Centre for Energy (iEnergy)
- Mechanical and Materials Engineering Department
- Masdar Institute of Science and Technology (MIST)
- United Arab Emirates
| | - Amal Al Ghaferi
- Institute Centre for Energy (iEnergy)
- Mechanical and Materials Engineering Department
- Masdar Institute of Science and Technology (MIST)
- United Arab Emirates
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Huber J, Heimbürger LE, Sonke JE, Ziller S, Lindén M, Leopold K. Nanogold-Decorated Silica Monoliths as Highly Efficient Solid-Phase Adsorbent for Ultratrace Mercury Analysis in Natural Waters. Anal Chem 2015; 87:11122-9. [DOI: 10.1021/acs.analchem.5b03303] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jessica Huber
- Institute
for Analytical and Bioanalytical Chemistry, University of Ulm, Albert-Einstein-Allee
11, 89081 Ulm, Germany
| | - Lars-Eric Heimbürger
- Geochemistry
and Hydrogeology, University of Bremen, Klagenfurter Straße, 28359 Bremen, Germany
- Geosciences
Environment Toulouse, Observatoire Midi-Pyrénées, Université Paul Sabatier, 14 avenue Edouard Belin, 31400 Toulouse, France
| | - Jeroen E. Sonke
- Geosciences
Environment Toulouse, Observatoire Midi-Pyrénées, Université Paul Sabatier, 14 avenue Edouard Belin, 31400 Toulouse, France
| | - Sebastian Ziller
- Inorganic
Chemistry II, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Mika Lindén
- Inorganic
Chemistry II, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Kerstin Leopold
- Institute
for Analytical and Bioanalytical Chemistry, University of Ulm, Albert-Einstein-Allee
11, 89081 Ulm, Germany
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15
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Passos ML, Pinto PC, Santos JL, Saraiva MLM, Araujo AR. Nanoparticle-based assays in automated flow systems: A review. Anal Chim Acta 2015; 889:22-34. [DOI: 10.1016/j.aca.2015.05.052] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Revised: 05/20/2015] [Accepted: 05/22/2015] [Indexed: 01/25/2023]
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16
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Srivastava B, Barman MK, Chatterjee M, Mandal B. EBT anchored SiO2 3-D microarray: a simultaneous entrapper of two different metal centers at high and low oxidation states using its highest occupied and lowest unoccupied molecular orbital, respectively. RSC Adv 2015. [DOI: 10.1039/c5ra07103h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Simultaneous binding of two different metal centers, Zr(iv) and Tl(i) at the HOMO and LUMO, respectively, of the extractor (FSG-EBT).
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Affiliation(s)
- Bhavya Srivastava
- Analytical Laboratory
- Department of Chemistry
- Visva-Bharati
- Santiniketan 731235
- India
| | - Milan K. Barman
- Analytical Laboratory
- Department of Chemistry
- Visva-Bharati
- Santiniketan 731235
- India
| | - Mousumi Chatterjee
- Analytical Laboratory
- Department of Chemistry
- Visva-Bharati
- Santiniketan 731235
- India
| | - Bhabatosh Mandal
- Analytical Laboratory
- Department of Chemistry
- Visva-Bharati
- Santiniketan 731235
- India
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17
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Roy R, Rakshit S, Bhar S, Chandra Bhattacharya S. A colorimetric and turn-on fluorescent chemosensor for selective detection of Hg2+: theoretical studies and intracellular applications. RSC Adv 2015. [DOI: 10.1039/c5ra06582h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A new colorimetric, “turn-on” fluorescent chemosensor (DEAS-BPH) was synthesized for selective and sensitive recognition of Hg2+ ions with no interference from environmentally relevant metal ions in a mixed organo-aqueous medium.
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Affiliation(s)
- Rimi Roy
- Department of Chemistry
- Organic Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
| | - Soumyadipta Rakshit
- Department of Chemistry
- Physical Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
| | - Sanjay Bhar
- Department of Chemistry
- Organic Chemistry Section
- Jadavpur University
- Kolkata 700 032
- India
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18
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Shih YC, Ke CY, Yu CJ, Lu CY, Tseng WL. Combined tween 20-stabilized gold nanoparticles and reduced graphite oxide-Fe3O4 nanoparticle composites for rapid and efficient removal of mercury species from a complex matrix. ACS APPLIED MATERIALS & INTERFACES 2014; 6:17437-17445. [PMID: 25238563 DOI: 10.1021/am5033988] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study describes a simple method for removing mercuric ions (Hg(2+)) from a high-salt matrix based on the use of Tween-20-stabilized gold nanoparticles (Tween 20-Au NPs) as Hg(2+) adsorbents and composites of reduced graphite oxide and Fe3O4 NPs as NP collectors. Citrate ions adsorbed on the surface of the Tween 20-Au NPs reduced Hg(2+) to Hg(0), resulting in the deposition of Hg(0) on the surface of the NPs. To circumvent time-consuming centrifugation and transfer steps, the Hg(0)-containing gold NPs were collected using reduced graphite oxide-Fe3O4 NP composites. Compared with the reported NP-based methods for removing Hg(2+), Tween 20-Au NPs offered the rapid (within 30 min), efficient (>99% elimination efficiency), durable (>10 cycles), and selective removal of Hg(2+), CH3Hg(+), and C2H5Hg(+) in a high-salt matrix without the interference of other metal ions. This was attributed to the fact that the dispersed Tween 20-Au NPs exhibited large surface-area-to-volume ratio to bind Hg(2+) through Hg(2+)-Au(+) metallophilic interactions in a high-salt matrix. The formation of graphite oxide sheets and reduced graphite oxide-Fe3O4 NP composites was demonstrated using X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, Fourier transform infrared spectrometry, and transmission electron microscopy. The mechanism of interaction between Tween 20-Au NPs and Hg(2+) was studied using visible spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy.
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Affiliation(s)
- Ya-Chen Shih
- Department of Chemistry, National Sun Yat-sen University , Kaohsiung 804, Taiwan
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Kiran K. Gold nanoparticles for mercury determination in environmental water and vegetable samples. APPLIED NANOSCIENCE 2014. [DOI: 10.1007/s13204-014-0325-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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