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Bogireddy NKR, Ghafour El Hachimi A, Celaya CA, Muñiz J, Thomas T, Elias AL, Lei Y, Terrones M, Agarwal V. Exploring PtAg onto silanized biogenic silica as an electrocatalyst for H 2 evolution: A combined experimental and theoretical investigation. J Colloid Interface Sci 2025; 677:271-283. [PMID: 39146815 DOI: 10.1016/j.jcis.2024.07.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 07/11/2024] [Accepted: 07/20/2024] [Indexed: 08/17/2024]
Abstract
The task of creating a remarkably stable and effective electrochemical catalyst for efficient hydrogen evolution is arduous, primarily due to the multitude of factors that need to be taken into account for the industrial utilization of Pt. In this work, hybrid formation through in-situ reduction of Pt onto biogenic porous silica (Pt-SiO2) is tested for its use as an efficient catalyst for hydrogen production. Exceptionally high electrocatalytic activity and excellent reusability of catalysts up to 200 cycles have been demonstrated. Pt-SiO2 with low Pt content of 0.48 to 0.82 at% with active catalytic sites exhibit superior catalytic activity with a Tafel slope of 22 mV dec-1 and an overpotential of 28 mV (vs. RHE at 10 mA cm-2) as compared to the Pt wire and previously reported bare Pt-SiO2 (0.65 at% and 0.48 at% of Pt), and hybrid (Pt/Ag) structures formed onto two different biogenic porous SiO2 substrates. The best catalytic performance of the Pt1Ag3 cluster, representing a low Pt concentration, has been validated by Density Functional Theory (DFT) calculations. Here, the high production from the Pt1Ag3 cluster is assigned to the mutual synergistic effect between Pt/Ag atoms. The Pt atoms transfer the excess charge to the nearest Ag neighbors inside the cluster, facilitating hydrogen diffusion on the activated sites. These important findings authenticate the superior hydrogen production at reduced Pt concentration on amine-functionalized biogenic porous silica.
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Affiliation(s)
| | - Abdel Ghafour El Hachimi
- Instituto de Investigación en Química de la Universidad de La Rioja (IQUR), Complejo Científico-Tecnológico, 26006-Logroño, Spain
| | - Christian A Celaya
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada, B.C., C.P. 22800, Mexico
| | - Jesús Muñiz
- Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos-62580, Mexico
| | - Tijin Thomas
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai-400076, India
| | - Ana Laura Elias
- Department of Physics, Binghamton University, Binghamton, NY-13902, USA
| | - Yu Lei
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen-518055, China
| | - Mauricio Terrones
- Department of Physics, Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA-16802, USA.
| | - Vivechana Agarwal
- Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos-62209, Mexico.
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Xie Z, Zhang Y, Zhang Y, Li Z, Sun L, Zhang S, Du C, Zhong C. Preparation of N-doped porous biochar with high specific surface area and its efficient adsorption for mercury ion from aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:122121-122135. [PMID: 37966640 DOI: 10.1007/s11356-023-31026-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 11/07/2023] [Indexed: 11/16/2023]
Abstract
Herein, a new type of super active nitrogen-doped biochar sheet (SNBC) was prepared by two-step pyrolysis and KOH chemical activation with melamine and cherry kernel powder as precursors of nitrogen and carbon source for removing Hg2+ from wastewater. The N2 adsorption/desorption and scanning electron microscope characterization revealed that the resulted SNBC under 600 °C calcination owned huge specific surface area of 2828 m2/g and plenty of well-developed micropores, and X-ray photoelectron spectroscopy and Fourier transform-infrared spectroscopy analysis testified the existence of functional groups containing N and O, which could provide adsorption sites for Hg2+. The SNBC-600 showed high adsorption capacity for Hg2+ even at low pH, and interfering cations had little effect on the adsorption. The adsorption process was rapid and dynamic data fit the pseudo-second-order dynamic model well. The maximum adsorption capacity of Hg2+ on SNBC-600 calculated by Langmuir model was 230 mg/g. After six times of reuse, the adsorption capacity still exceeded 200 mg/g, exhibiting good reusability. The designed microfiltration membrane device base on SNBC-600 could remove low concentration of Hg2+ effectively from solution. This study provided a simple and environment-friendly method for manufacturing nitrogen-doped biochar sheet, which was of great significance in the practical application of Hg2+ pollution treatment.
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Affiliation(s)
- Zengrun Xie
- School of Chemistry and Materials Science, Institute of Environmental Science, Ludong University, Yantai, 264025, Shandong Province, China
| | - Yuanyuan Zhang
- Environmental Monitor Station of Yantai, No. 118, Qingnian South Road, Yantai, 264000, Shandong Province, China
| | - Yinghong Zhang
- Environmental Monitor Station of Yantai, No. 118, Qingnian South Road, Yantai, 264000, Shandong Province, China
| | - Zhiling Li
- Division of Science and Technology, Ludong University, Yantai, 264025, Shandong Province, China
| | - Lixiang Sun
- School of Chemistry and Materials Science, Institute of Environmental Science, Ludong University, Yantai, 264025, Shandong Province, China
| | - Shengxiao Zhang
- School of Chemistry and Materials Science, Institute of Environmental Science, Ludong University, Yantai, 264025, Shandong Province, China.
| | - Chenyu Du
- School of Chemistry and Materials Science, Institute of Environmental Science, Ludong University, Yantai, 264025, Shandong Province, China
| | - Caijuan Zhong
- School of Chemistry and Materials Science, Institute of Environmental Science, Ludong University, Yantai, 264025, Shandong Province, China
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A multifunctional adsorbent based on 2,3-dimercaptosuccinic acid/dopamine-modified magnetic iron oxide nanoparticles for the removal of heavy-metal ions. J Colloid Interface Sci 2023; 636:153-166. [PMID: 36623368 DOI: 10.1016/j.jcis.2023.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/12/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023]
Abstract
Overexploitation of nature by humans has led to an increasingly serious issue of heavy-metal water pollution. To reduce the threat of water pollution to humans and the environment, it is imperative to develop or improve the water treatment technology for heavy-metal-containing wastewater. Functionalized Fe3O4 magnetic nanoparticles (Fe3O4 MNPs) have been widely used as effective adsorbents for the removal of heavy-metal ions from water owing to their high efficiency, low cost, selective adsorption ability, and recyclability. In this study, Fe3O4@DA-DMSA magnetic nanoparticles (FDDMs) were prepared by the functionalization of Fe3O4 MNPs with environmentally friendly dopamine (DA) and a heavy-metal detoxifying agent such as 2,3-dimercaptosuccinic acid (DMSA) for the efficient and rapid adsorption of Pb2+, Cu2+, and Cd2+, with maximum adsorption capacities of 187.62, 63.01, and 49.46 mg/g, respectively. FDDMs exhibited the best ability to remove Pb2+ with a maximum adsorption capacity than that of the most reported Fe3O4 MNP-related adsorbents. In actual wastewater and multi-component simulated water samples contaminated with Pb2+, Cu2+, and Cd2+, the as-prepared adsorbent maintained a good removal ability for Pb2+ with low influence by ionic strength and interfering ions, as well as exhibited an excellent selectivity. According to the results of batch experiments and X-ray photoelectron spectroscopy (XPS) analysis of the adsorbent before and after adsorption, the adsorption mechanism of the adsorbent for the removal of heavy-metal ions mainly involves coordination and ion exchange. In addition, the adsorbent exhibited a good regeneration performance. Therefore, FDDMs can be considered as a promising adsorbent for the treatment of heavy-metal wastewater.
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4
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Krishnan U, Iyer SK. A Pyrazolo Imine-based Colorimetric and Turn-on Fluorescent Sensor Probe for Determination of Hg 2+ Ion and its Application in Test Paper Strips. Photochem Photobiol 2021; 98:843-855. [PMID: 34634146 DOI: 10.1111/php.13538] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 09/24/2021] [Indexed: 12/24/2022]
Abstract
In this work, we synthesized diethylamino substituted pyrazolo imine (3) fluorescent probe for recognition of Hg2+ ion.The sensor probe 3 can detect Hg2+ by colorimetric method, and there is a 10-fold enhancement in fluorescence response. When the fluorescent probe bound with Hg2+ ion, turn-on fluorescence was observed via the coordination. Probe 3 has an excellent selectivity toward Hg2+ in the CH3 CN/H2 O (8:2, v/v) solution with low limit of detection and high binding association constant of 551 parts per billion (ppb) and 6.6067 × 106 m-1 for 3+Hg2+ , respectively. Furthermore, the formation of 3+Hg2+ complex with 1:1 binding mode was evidenced by Job's plot, 1 H NMR spectroscopy and Mass analysis. In addition, probe 3 is a feasible option to detect Hg2+ in various sources of water samples. Bio-imaging experiments have demonstrated that probe 3 can be used to monitor Hg2+ in Escherichia coli bacterial cell. The sensor 3 was also used for paper strip application to detect Hg2+ ion.
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Affiliation(s)
- Uma Krishnan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, India
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Wang L, Jiang X, Su S, Rao J, Ren Z, Lei T, Bai H, Wang S. A thiol and magnetic polymer-based electrochemical sensor for on-site simultaneous detection of lead and copper in water. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Tavallali H, Rahimi E, Deilamy‐Rad G, Karimi MA, Tavallali M. A novel colorimetric chemosensor for selective and highly sensitive determination of thiourea: An approach toward a molecular keypad lock. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Eisa Rahimi
- Department of Chemistry Payame Noor University Tehran Iran
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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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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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10
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Electrochemical Sensor of Double-Thiol Linked PProDOT@Si Composite for Simultaneous Detection of Cd(II), Pb(II), and Hg(II). Polymers (Basel) 2019; 11:polym11050815. [PMID: 31067664 PMCID: PMC6572651 DOI: 10.3390/polym11050815] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/19/2019] [Accepted: 04/22/2019] [Indexed: 01/28/2023] Open
Abstract
Heavy metal ions in water, cosmetics, and arable land have become a world-wide issue as they cause a variety of diseases and even death to humans and animals when a certain level is exceeded. Therefore, it is necessary to development a new kind of sensor material for the determination of heavy metal ions. In this paper, we present an electrochemical sensor based on composite material (thiol(-SH) grafted poly(3,4-proplenedioxythiophene) (PProDOT(MeSH)2)/ porous silicon spheres (Si) composite, denoted as PProDOT(MeSH)2@Si) from the incorporation of thiol(-SH) grafted poly(3,4-proplenedioxythiophene) (PProDOT(MeSH)2) with porous silicon spheres (Si) for the electrochemical detection of heavy metal ions (Cd(II), Pb(II), and Hg(II)). The PProDOT(MeSH)2@Si composite was synthesized via a chemical oxidative polymerization method. The structure and morphology of PProDOT(MeSH)2@Si composite were characterized by Fourier transform infrared (FT-IR), Ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction (XRD), scanning electron microscope (SEM), Transmission electron microscope (TEM), and Brunauer-Emmett-Teller (BET). Furthermore, the electrochemical performance of PProDOT(MeSH)2@Si was evaluated by detecting of Cd(II), Pb(II), and Hg(II) ions using the differential pulse voltammetry (DPV) method. The relationship between structural properties and the electrochemical performance was systematically studied. The results showed that the entry of two thiol-based chains to the monomer unit resulted in an increase in electrochemical sensitivity in PProDOT(MeSH)2, which was related to the interaction between thiol group(-SH) and heavy metal ions. And, the combination of PProDOT(MeSH)2 with Si could improve the electrocatalytic efficiency of the electrode material. The PProDOT(MeSH)2@Si/GCE exhibited high selectivity and sensitivity in the rage of 0.04 to 2.8, 0.024 to 2.8, and 0.16 to 3.2 μM with the detection limit of 0.00575, 0.0027, and 0.0017 µM toward Cd(II), Pb(II), and Hg(II), respectively. The interference studies demonstrated that the PProDOT(MeSH)2@Si/GCE possessed a low mutual interference and high selectivity for simultaneous detection of Cd(II), Pb(II), and Hg(II) ions.
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Ji J, Chen G, Zhao J. Preparation and characterization of amino/thiol bifunctionalized magnetic nanoadsorbent and its application in rapid removal of Pb (II) from aqueous system. JOURNAL OF HAZARDOUS MATERIALS 2019; 368:255-263. [PMID: 30684763 DOI: 10.1016/j.jhazmat.2019.01.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/13/2018] [Accepted: 01/13/2019] [Indexed: 06/09/2023]
Abstract
To explore the effect of coexisted amino and thiol groups on adsorption of heavy metal, a novel magnetic nanoparticle was prepared by sequentially modification with (3-Chloropropyl) trimethoxysilan, polyetherimide, epichlorohydrin and thiourea. Subsequently, it was characterized by TEM, N2 adsorption/desorption, FTIR Spectroscopy, zeta potential, and VSM. The maximum adsorption capacity for Pb2+, Cd2+ and Cu2+ reached 110.13 mg·g-1, 40.23 mg·g-1 and 29.37 mg·g-1, respectively. The adsorption of the magnetic nanoparticles with different surface group for heavy metals were compared, which indicated that the amino and thiol group played an important role in the adsorption of heavy metals. Especially, the adsorption capacity increased dramatically after modification with the thiol group, which was attributed to the synergistic coordination of -NH2 and -SH. The adsorption kinetics is consistent with the quasi-second-order kinetics equation, and the adsorption thermodynamic process is consistent with the Langmuir isotherm equation. The effects of experimental conditions, such as pH, the concentration of metals, adsorption time and temperature, on adsorption of Pb2+ were studied in detail. In addition, over 90% of removal rate was remained after 6 cycles. The magnetic nanoadsorbents was a promising nanoadsorbent with high adsorption speed, simultaneous adsorption of various heavy metals, strong anti-interference ability and reusability.
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Affiliation(s)
- Jiujiang Ji
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, 668 Jimei Avenue, Xiamen, 361021, China
| | - Guo Chen
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, 668 Jimei Avenue, Xiamen, 361021, China; Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, 668 Jimei Avenue, Xiamen, 361021, China; Key Laboratory of Chemical Biology and Molecular Engineering (Huaqiao University), Fujian Province University, 668 Jimei Avenue, Xiamen, 361021, China.
| | - Jun Zhao
- Department of Bioengineering and Biotechnology, College of Chemical Engineering, Huaqiao University, 668 Jimei Avenue, Xiamen, 361021, China
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12
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Bayraç C, Camızcı G. Adsorptive removal of patulin from apple juice via sulfhydryl-terminated magnetic bead-based separation. JOURNAL OF HAZARDOUS MATERIALS 2019; 366:413-422. [PMID: 30554087 DOI: 10.1016/j.jhazmat.2018.12.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/30/2018] [Accepted: 12/01/2018] [Indexed: 06/09/2023]
Abstract
Patulin is a naturally produced toxin having potential carcinogenic properties. It is mainly produced by species of Penicillium growing on fruits, especially on apples. Detoxification of patulin, therefore, is very important for providing food safety. In this study, sulfhydryl-terminated, silica coated iron oxide beads were investigated as a multi-use sorbents for effective recovery of patulin from apple juice. The effect of beads amount, contact time, pH and temperature were evaluated for high adsorption capacity and the results showed maximum adsorption capacity at a reaction condition of 1.5 mg of beads for 4 h incubation at pH 7.2 and 25 °C. These sorbents were highly effective both in aqueous solution and apple juice with adsorption efficiencies of 99% and 71.25%, respectively. Adsorption process was explained by Langmuir isotherm model with pseudo-second order kinetic model. Thermodynamic parameters described spontaneous adsorption of patulin onto beads with high feasibility and preferences. The reusability of sulfhydryl coated magnetic beads was shown for at least four times without any significant decreases in efficiency. Results showed that this sorbent had potential for removal of patulin from apple juice without any negative effects on final quality parameters, Brix, color, clarity, total sugar and titratable acidity.
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Affiliation(s)
- Ceren Bayraç
- Department of Bioengineering, Karamanoğlu Mehmetbey University, Karaman, Turkey.
| | - Gülnur Camızcı
- Department of Bioengineering, Karamanoğlu Mehmetbey University, Karaman, Turkey
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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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Khdary NH, Ghanem MA, Abdesalam ME, Al-Garadah MM. Sequestration of CO 2 using Cu nanoparticles supported on spherical and rod-shape mesoporous silica. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2016.05.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Chen D, Hu YN, Hussain D, Zhu GT, Huang YQ, Feng YQ. Electrospun fibrous thin film microextraction coupled with desorption corona beam ionization-mass spectrometry for rapid analysis of antidepressants in human plasma. Talanta 2016; 152:188-95. [DOI: 10.1016/j.talanta.2016.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/30/2016] [Accepted: 02/01/2016] [Indexed: 11/29/2022]
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16
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In situ rapid magnetic solid-phase extraction coupled with HPLC-ICP-MS for mercury speciation in environmental water. Microchem J 2016. [DOI: 10.1016/j.microc.2015.11.040] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Irandoust M, Haghighi M. Fabrication of a new modified gold electrode based on gold nanoparticles and nanomagnetic Fe3O4/SiO2–(CH2)3–SH core shell for electrochemical evaluation and determination of dinitramine herbicide in water. RSC Adv 2016. [DOI: 10.1039/c6ra06187g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel sensitive voltammetric method is described for the determination of dinitramine based on its electrochemical oxidation on gold electrodes modified with Fe3O4@SiO2–Si–(CH2)3–SH core shell (Au/Au–NPs–S–(CH2)3–Si–SiO2@Fe3O4).
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Affiliation(s)
- Mohsen Irandoust
- Department of Analytical Chemistry
- Faculty of Chemistry
- Razi University
- Kermanshah
- Iran
| | - Maryam Haghighi
- Department of Analytical Chemistry
- Faculty of Chemistry
- Razi University
- Kermanshah
- Iran
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18
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Omorogie MO, Babalola JO, Unuabonah EI, Song W, Gong JR. Efficient chromium abstraction from aqueous solution using a low-cost biosorbent: Nauclea diderrichii seed biomass waste. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2012.09.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Sodipo BK, Abdul Aziz A. Non-seeded synthesis and characterization of superparamagnetic iron oxide nanoparticles incorporated into silica nanoparticles via ultrasound. ULTRASONICS SONOCHEMISTRY 2015; 23:354-359. [PMID: 25315418 DOI: 10.1016/j.ultsonch.2014.09.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 09/24/2014] [Accepted: 09/25/2014] [Indexed: 06/04/2023]
Abstract
A non-seeded method of incorporating superparamagnetic iron oxide nanoparticles (SPION) into silica nanoparticles is presented. Mixture of both SPION and silica nanoparticles was ultrasonically irradiated. The collapsed bubbles and shockwave generated from the ultrasonic irradiation produce tremendous force that caused inelastic collision and incorporation of SPION into the silica. Physicochemical analyses using transmission electron microscope (TEM), electronic spectroscopic imaging (ESI), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy demonstrated the formation of SPION/silica composite nanoparticles. The prepared composite nanoparticles exhibited superparamagnetic behaviour and nearly 70% of the initial saturation magnetization (Ms) of the SPION was retained. The presence and reactivity of the silica were demonstrated via assembling decanethiol monolayer on the composite nanoparticles. The silanol group of the silica provided the binding site for the alkyl group in the decanethiol molecules. Therefore, the thiol moiety became the terminal and functional group on the magnetic composite nanoparticles.
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Affiliation(s)
- Bashiru Kayode Sodipo
- Nano-Optoelectronics Research and Technology (NOR) Lab, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.
| | - Azlan Abdul Aziz
- Nano-Optoelectronics Research and Technology (NOR) Lab, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
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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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A novel hierarchical nanobiocomposite of graphene oxide–magnetic chitosan grafted with mercapto as a solid phase extraction sorbent for the determination of mercury ions in environmental water samples. Anal Chim Acta 2014; 850:49-56. [DOI: 10.1016/j.aca.2014.08.048] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 08/22/2014] [Accepted: 08/27/2014] [Indexed: 01/27/2023]
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22
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An In-Situ Functionalization of Decanethiol Monolayer on Thin Silica Coated Superparamagnetic Iron Oxide Nanoparticles Synthesized by Non-Seeded Process. ACTA ACUST UNITED AC 2014. [DOI: 10.4028/www.scientific.net/amr.1024.300] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Superparamagnetic iron oxide nanoparticles (SPION) are routinely employed in biomedical and water treatment applications due to their inherent magnetic properties. However, for these applications a surface modified and functionalized SPION is required. Herein, for the first time we present an in-situ method of functionalizing decanethiol monolayer on thin silica coated SPION synthesised via a non-seeded process. Through physico-chemical analyses the grafting of decanethiol onto the composite nanoparticles were demonstrated. The alkane functional group in the monolayer molecule attached to the silanol group of the silica shell and became the tail and binding site to the magnetic composite nanoparticles.
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23
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Incorporation of Cu, Fe, Ag, and Au nanoparticles in mercapto-silica (MOS) and their CO2 adsorption capacities. J CO2 UTIL 2014. [DOI: 10.1016/j.jcou.2013.11.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Khdary NH, Ghanem MA. Highly dispersed platinum nanoparticles supported on silica as catalyst for hydrogen production. RSC Adv 2014. [DOI: 10.1039/c4ra09341k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A synthetic approach is developed to produce highly disperse, low loading (3.28 wt%) Pt nanoparticles incorporated silica (Pt-NP–S) with average diameter of 3.5 nm using economical and simple surface chemical modification and reduction processes.
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Affiliation(s)
- Nezar H. Khdary
- King Abdulaziz City for Science and Technology
- , Kingdom of Saudi Arabia
| | - Mohamed A. Ghanem
- Chemistry Department
- College of Science
- King Saud University
- Kingdom of Saudi Arabia
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25
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Khdary NHM, Gassim AEH. The Distribution and Accretion of Some Heavy Metals in Makkah Wells. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jwarp.2014.611094] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Preparation of thiol-modified Fe3O4@SiO2 nanoparticles and their application for gold recovery from dilute solution. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.06.018] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Li N, Lei L, Nian L, Zhang R, Wu S, Ren R, Wang Y, Zhang H, Yu A. A modified QuEChERS method for the determination of some herbicides in yogurt and milk by high performance liquid chromatography. Talanta 2013; 105:219-28. [DOI: 10.1016/j.talanta.2012.11.057] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Revised: 11/20/2012] [Accepted: 11/24/2012] [Indexed: 11/17/2022]
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28
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Khdary NH, Ghanem MA. Metal–organic–silica nanocomposites: copper, silver nanoparticles–ethylenediamine–silica gel and their CO2 adsorption behaviour. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31104f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Gao Y, De Canck E, Leermakers M, Baeyens W, Van Der Voort P. Synthesized mercaptopropyl nanoporous resins in DGT probes for determining dissolved mercury concentrations. Talanta 2011; 87:262-7. [DOI: 10.1016/j.talanta.2011.10.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 10/03/2011] [Accepted: 10/12/2011] [Indexed: 11/27/2022]
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