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Kumar M, Kumar A, Kishor S, Kumar S, Kumar A, Manav N, Bhagi A, Kumar S, John RP. N-diethylaminosalicylidene based “turn-on” fluorescent Schiff base chemosensor for Al3+ ion: Synthesis, characterisation and DFT/TD-DFT studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131257] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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2
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Kaur M, Sahoo SC, Kaur H. New Schiff Base as Selective and Sensitive Detection of Copper Ions in Aqueous Solvent. ChemistrySelect 2020. [DOI: 10.1002/slct.202003880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Manpreet Kaur
- Department of Applied Sciences Punjab Engineering College (Deemed to be University), Sector-12 Chandigarh India
| | - Subash C. Sahoo
- Department of Chemistry Panjab University, Sector-14 Chandigarh India
| | - Harminder Kaur
- Department of Applied Sciences Punjab Engineering College (Deemed to be University), Sector-12 Chandigarh India
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Vojoudi H, Bastan B, Ghasemi JB, Badiei A. An ultrasensitive fluorescence sensor for determination of trace levels of copper in blood samples. Anal Bioanal Chem 2019; 411:5593-5603. [PMID: 31289896 DOI: 10.1007/s00216-019-01940-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/09/2019] [Accepted: 05/23/2019] [Indexed: 11/29/2022]
Abstract
A novel SBA-15-based fluorescent sensor, SBA-PI: mesoporous SBA-15 structure modified with iminostilbene groups, was designed, synthesized, and characterized by Fourier transform-infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), low-angle X-ray diffraction techniques (low-angle XRD), and N2 adsorption-desorption techniques. The SBA-PI as a sensor with a selective behavior for detection of Cu2+ comprises iminostilbene carbonyl as the fluorophore group. The SBA-PI sensor displays an excellent fluorescence response in aqueous solutions and the fluorescence intensity quenches remarkably upon addition of Cu2+. Other common interfering ions even at high concentration ratio showed either no or very small changes in the fluorescence intensity of SBA-PI in the absence of Cu2+. A limit of detection of 8.7 × 10-9 M for Cu2+ indicated that this fluorescence sensor has a high sensitivity and selectivity toward the target copper (II) ion. The fabricated Cu2+ sensor was successfully applied for the determination of the Cu2+ in human blood samples without any significant interference. With the selective analysis of Cu2+ ions down to 0.9 nM in blood, the sensor is a promising and a novel detection candidate for Cu2+ and can be applied in the clinical laboratory. A reversibility and accuracy in the fluorescence behavior of the sensor was found in the presence of I¯ that was described as a masking agent for Cu2+. Graphical abstract.
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Affiliation(s)
- Hossein Vojoudi
- School of Chemistry, College of Science, University of Tehran, Tehran, 14174, Iran
| | - Bahareh Bastan
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, 13185, Iran
| | - Jahan B Ghasemi
- School of Chemistry, College of Science, University of Tehran, Tehran, 14174, Iran
| | - Alireza Badiei
- School of Chemistry, College of Science, University of Tehran, Tehran, 14174, Iran.
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4
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V. H. V, Saxena M, R. GB, Latiyan S, Jain S. Remarkably selective biocompatible turn-on fluorescent probe for detection of Fe3+ in human blood samples and cells. RSC Adv 2019; 9:27439-27448. [PMID: 35529189 PMCID: PMC9070666 DOI: 10.1039/c9ra05256a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 08/18/2019] [Indexed: 11/21/2022] Open
Abstract
The robust nature of a biocompatible fluorescent probe is demonstrated, by its detection of Fe3+ even after repeated rounds of quenching (reversibility) by acetate in real human blood samples and cells in vitro.
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Affiliation(s)
- Vishaka V. H.
- Center for Nano and Material Science
- Jain University
- Bangalore Rural-562112
- India
| | - Manav Saxena
- Center for Nano and Material Science
- Jain University
- Bangalore Rural-562112
- India
| | | | - Sachin Latiyan
- Metallurgical and Materials Engineering
- National Institute of Technology
- Tiruchirapalli-620015
- India
- Centre for Biosystems Science and Engineering
| | - Shilpee Jain
- Centre for Biosystems Science and Engineering
- Indian Institute of Science
- Bangalore-560012
- India
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Zhang X, Zhang Y, Zhang X, Li S, Huang Y. Nitrogen rich core-shell magnetic mesoporous silica as an effective adsorbent for removal of silver nanoparticles from water. JOURNAL OF HAZARDOUS MATERIALS 2017; 337:1-9. [PMID: 28501638 DOI: 10.1016/j.jhazmat.2017.04.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/10/2017] [Accepted: 04/11/2017] [Indexed: 05/26/2023]
Abstract
The production and increasing use of silver nanoparticles (AgNPs) obviously results in their release into the environment, leading to a risk to the environment due to their toxic effects. Thus, the removal of AgNPs from water is highly needed. Here, we demonstrate that nitrogen rich (∼10% nitrogen content) core-shell magnetic mesoporous silica is a promising adsorbent for the removal of AgNPs. For this, the poly(ethylenimine) functionalized core-shell magnetic mesoporous silica composites (Fe3O4@SiO2-PEI) were prepared, and characterized by TEM, FT-IR, XRD, TG and N2 adsorption-desorption. The removal of AgNPs by Fe3O4@SiO2-PEI as a function of contact time, concentration of AgNPs, solution pH and ionic strength were studied. The adsorption kinetic data could be described by the pseudo-second-order rate model. Both Langmuir and Freundlich models fitted the adsorption data well. The adsorption capacity for AgNPs is 909.1mg/g, which is 5-181 times higher than that of the previously reported adsorbents for AgNPs. Interestingly, the silver adsorbed onto Fe3O4@SiO2-PEI exhibits highly catalytic activity for 4-nitropheol (4-NP) reduction with a rate constant of 0.072min-1, which is much higher than those by other AgNPs reported before. The silver-loaded Fe3O4@SiO2-PEI promises good recyclability for at least five cycles, showing great potential in practical applications.
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Affiliation(s)
- Xiaoye Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yao Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaodan Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Siqi Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yuming Huang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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6
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Hou Y, Liu J, Hong M, Li X, Ma Y, Yue Q, Li CZ. A reusable aptasensor of thrombin based on DNA machine employing resonance light scattering technique. Biosens Bioelectron 2017; 92:259-265. [PMID: 28231553 DOI: 10.1016/j.bios.2017.02.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/28/2017] [Accepted: 02/16/2017] [Indexed: 10/20/2022]
Abstract
The design of molecular nanodevices attracted great interest in these years. Herein, a reusable, sensitive and specific aptasensor was constructed based on an extension-contraction movement of DNA interconversion for the application of human thrombin detection. The present biosensor was based on resonance light scattering (RLS) using magnetic nanoparticles (MNPs) as the RLS probe. MNPs coated with streptavidin can combine with biotin labeled thrombin aptamers. The combined nanoparticles composite is monodispersed in aqueous medium. When thrombin was added a sandwich structure can form on the surface of MNPs, which induced MNPs aggregation. RLS signal was therefore enhanced, and there is a linear relationship between RLS increment and thrombin concentration in the range of 60pM-6.0nM with a limit of detection at 3.5pM (3.29SB/m, according to the recent recommendation of IUPAC). The present aptasensor can be repeatedly used for at least 6 cycling times by heat to transfer G-quadruplex conformation to single strand of DNA sequence and release thrombin. MNPs can be captured by applying the external magnetic field. Furthermore, the proposed biosensor was successfully applied to detect thrombin in human plasma.
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Affiliation(s)
- Yining Hou
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Jifeng Liu
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Min Hong
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Xia Li
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Yanhua Ma
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Qiaoli Yue
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China.
| | - Chen-Zhong Li
- Nanobioengineering/Bioelectronics Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL 33174, USA.
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Park JS, Choi Y, Ahn J, Seo ML, Hwa Jung J. Bis(naphthol)-based fluorescent chemoprobe for cesium cation and its immobilisation on silica nanoparticle as a high selective adsorbent. Supramol Chem 2017. [DOI: 10.1080/10610278.2016.1269904] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jeong Su Park
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, Korea
| | - Yeonweon Choi
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, Korea
| | - Junho Ahn
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, Korea
| | - Moo Lyong Seo
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, Korea
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, Korea
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8
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Saputra E, Zhang H, Liu Q, Sun H, Wang S. Egg-shaped core/shell α-Mn2O3@α-MnO2 as heterogeneous catalysts for decomposition of phenolics in aqueous solutions. CHEMOSPHERE 2016; 159:351-358. [PMID: 27318450 DOI: 10.1016/j.chemosphere.2016.06.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/02/2016] [Accepted: 06/05/2016] [Indexed: 06/06/2023]
Abstract
Novel uniform ellipsoid α-Mn2O3@α-MnO2 core/shell (McMs) nanocomposites were prepared via a hydrothermal process with a shape-control protocol followed by calcination at different temperatures. The properties of the composites were characterized by a number of techniques such as thermogravimetric analysis (TGA), X-ray diffraction (XRD), N2 adsorption, and scanning electron microscopy (SEM). The core/shell materials were much effective in heterogeneous oxone(®) activation to generate sulfate and hydroxyl radicals for degradation of aqueous phenol. The McMs composites demonstrated catalytic activity for 100% phenol decomposition in short duration varying between 20 and 120 min, much higher than that of homogeneous Mn(2+) system with 95% phenol degradation in 120 min. They also showed a higher activity than single-phase α-Mn2O3 or α-MnO2. The catalytic activity of phenol degradation depends on temperature, oxone(®) concentration, phenol concentration, and catalyst loading. The catalysts also showed a stable activity in several cycles. Kinetic study demonstrated that phenol degradation reactions follow a first order reaction on McMs catalysts giving activation energies at 32.1-68.8 kJ/mol. With the detection of radicals by electron paramagnetic resonance (EPR), the generation mechanism was proposed.
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Affiliation(s)
- Edy Saputra
- Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, Perth, WA 6845, Australia; Department of Chemical Engineering, Riau University, Pekanbaru 28293, Indonesia
| | - Huayang Zhang
- Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Qiaoran Liu
- Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Hongqi Sun
- Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, Perth, WA 6845, Australia; School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
| | - Shaobin Wang
- Department of Chemical Engineering and CRC for Contamination Assessment and Remediation of the Environment (CRC-CARE), Curtin University, GPO Box U1987, Perth, WA 6845, Australia.
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9
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Yang Y, Yuan Z, Liu XP, Liu Q, Mao CJ, Niu HL, Jin BK, Zhang SY. Electrochemical biosensor for Ni 2+ detection based on a DNAzyme-CdSe nanocomposite. Biosens Bioelectron 2016; 77:13-8. [DOI: 10.1016/j.bios.2015.09.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/05/2015] [Accepted: 09/07/2015] [Indexed: 10/23/2022]
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10
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Lü H, Wang X, Yang J, Xie Z. One-step synthesis of CDTA coated magnetic nanoparticles for selective removal of Cu(II) from aqueous solution. Int J Biol Macromol 2015; 78:209-14. [DOI: 10.1016/j.ijbiomac.2015.03.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/09/2015] [Accepted: 03/31/2015] [Indexed: 11/29/2022]
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11
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Thatai S, Khurana P, Boken J, Prasad S, Kumar D. Nanoparticles and core–shell nanocomposite based new generation water remediation materials and analytical techniques: A review. Microchem J 2014. [DOI: 10.1016/j.microc.2014.04.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Li Z, Mo L, Kathiraser Y, Kawi S. Yolk–Satellite–Shell Structured Ni–Yolk@Ni@SiO2 Nanocomposite: Superb Catalyst toward Methane CO2 Reforming Reaction. ACS Catal 2014. [DOI: 10.1021/cs401027p] [Citation(s) in RCA: 360] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ziwei Li
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, Singapore 119260, Republic of Singapore
| | - Liuye Mo
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, Singapore 119260, Republic of Singapore
| | - Yasotha Kathiraser
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, Singapore 119260, Republic of Singapore
| | - Sibudjing Kawi
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, Singapore 119260, Republic of Singapore
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Lv Q, Li G, Cheng Z, Lu H, Gao X. Magnetically recoverable fluorescence chemosensor for the adsorption and selective detection of Hg2+ in water. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:116-23. [PMID: 24270323 DOI: 10.1039/c3em00462g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In order to conveniently and effectively detect the heavy metal ion Hg(2+) existing in water, a magnetic fluorescence chemosensor has been strategically prepared by immobilizing a Rhodamine B derivative RhB-tris(2-aminoethyl)amine on Fe3O4@SiO2-Au@PSiO2 composites via gold particles. The adsorption and detection for Hg(2+) ions were investigated with fluorophotometry. This chemosensor shows high sensitivity and high selectivity for Hg(2+) over other metal cations owing to the ring opening of the rhodamine fluorophore selectively induced by Hg(2+). In addition, the presence of Fe3O4 in the sensor also facilitates the magnetic separation of the Fe3O4@SiO2-Au-Hg(2+)@PSiO2 from the solution.
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Affiliation(s)
- Qiang Lv
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China.
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14
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Pratt A. Environmental Applications of Magnetic Nanoparticles. NANOMAGNETISM: FUNDAMENTALS AND APPLICATIONS 2014. [DOI: 10.1016/b978-0-08-098353-0.00007-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Wang W, Zhang Y, Yang Q, Sun M, Fei X, Song Y, Zhang Y, Li Y. Fluorescent and colorimetric magnetic microspheres as nanosensors for Hg2+ in aqueous solution prepared by a sol-gel grafting reaction and host-guest interaction. NANOSCALE 2013; 5:4958-4965. [PMID: 23632769 DOI: 10.1039/c3nr00580a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fluorescent sensing TSRh6G-β-cyclodextrin fluorophore/adamantane-modified inclusion complex magnetic nanoparticles (TFIC MNPs) have been synthesized via the cooperation of a host-guest interaction and sol-gel grafting reaction. Powder X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, and UV-visible absorption and emission spectroscopy have been employed to characterize the material. Fluorescence and UV-visible spectra have shown that the resultant multifunctional nanoparticle sensors exhibit selective 'turn-on' type fluorescent enhancements and a clear color change from light brown to pink with Hg(2+). Owing to a larger surface area and high permeability, TFIC MNPs exhibit remarkable selectivity and sensitivity for Hg(2+), and its detection limit measures up to the micromolar level in aqueous solution. Most importantly, magnetic measurements have shown that TFIC magnetic nanoparticles are superparamagnetic and they can be separated and collected easily using a commercial magnet. These results not only solve the limitations in practical sensing applications of nanosensors, but also enable the fabrication of other multifunctional nanostructure-based hybrid nanomaterials.
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Affiliation(s)
- Wei Wang
- Department of Chemistry, Jilin University, Changchun 130021, PR China
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16
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Singh K, Sareen D, Kaur P, Miyake H, Tsukube H. Materials-Based Receptors: Design Principle and Applications. Chemistry 2013; 19:6914-36. [DOI: 10.1002/chem.201300249] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Indexed: 12/12/2022]
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17
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Yang X, Shen Z, Zhang B, Yang J, Hong WX, Zhuang Z, Liu J. Silica nanoparticles capture atmospheric lead: implications in the treatment of environmental heavy metal pollution. CHEMOSPHERE 2013; 90:653-656. [PMID: 23084516 DOI: 10.1016/j.chemosphere.2012.09.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 07/30/2012] [Accepted: 09/08/2012] [Indexed: 06/01/2023]
Abstract
Lead (Pb) contamination in the air is a severe global problem, most notably in China. Removal of Pb from polluted air remains a significant challenge. It is unclear what potential effects silica nanoparticles (SiNPs) exposure can have on atmospheric Pb. Here we first characterized the features of SiNPs by measuring the particle size, zeta potential and the specific surface area of SiO(2) particles using a Nicomp 380/ZLS submicron particle sizer, the Brunauer-Emmett-Teller (BET) method and transmission electronic microscopy (TEM). We measured the content of the metal Pb adsorbed by SiNPs exposed to two Pb polluted electric battery plants using inductively coupled plasma mass spectrometry (ICP-MS). It is found that SiNPs exposed to two Pb polluted electric battery plants absorb more atmospheric Pb compared to either blank control or micro-sized SiO(2) particles in a time-dependent manner. This is the first study demonstrating that SiNPs exposure can absorb atmospheric Pb in the polluted environment. These novel findings indicate that SiNPs have potential to serve as a significant adsorbent of Pb from industrial pollution, implicating a potentially novel application of SiNPs in the treatment of environmental heavy metal pollution.
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Affiliation(s)
- Xifei Yang
- Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
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Park S, Lee JH, Jung JH. A thin-layered chromatography plate prepared from naphthalimide-based receptor immobilized SiO2 nanoparticles as a portable chemosensor and adsorbent for Pb2+. Analyst 2013; 138:2812-5. [DOI: 10.1039/c3an00292f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tan ZQ, Liu JF, Jiang GB. Visual test of subparts per billion-level copper(II) by Fe3O4 magnetic nanoparticle-based solid phase extraction coupled with a functionalized gold nanoparticle probe. NANOSCALE 2012; 4:6735-6738. [PMID: 23026855 DOI: 10.1039/c2nr31753b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
By combining Fe(3)O(4) magnetic nanoparticle-based solid phase extraction with a gold nanoparticle-based visual test, a novel method was developed for the field assay of Cu(ii) in environmental water at subparts per billion-levels within 30 min. When a 200 mL water sample was treated with 12.5 mg L(-1) Fe(3)O(4) nanoparticles by the proposed procedure, the detection limit with the naked eye was 0.2 μg L(-1) Cu(ii). The proposed method is very specific to Cu(ii), with tolerance against at least 100-fold amounts of other environmentally relevant metal ions except for Hg(ii) (25-fold), and was successfully applied to the detection of trace Cu(ii) in tap water, river water, and treated wastewater, and results agreed well with that determined by inductively coupled plasma-mass spectrometry (ICP-MS).
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Affiliation(s)
- Zhi-qiang Tan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
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Li C, Liu J, Alonso S, Li F, Zhang Y. Upconversion nanoparticles for sensitive and in-depth detection of Cu2+ ions. NANOSCALE 2012; 4:6065-71. [PMID: 22930418 DOI: 10.1039/c2nr31570j] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Detection of Cu(2+) ions and study of their subcellular distribution in physiological processes are of considerable significance because of their potential environmental and biological applications. Some fluorescence based sensors have been developed for selective detection of Cu(2+) ions, based on organic fluorescent probes that specifically bind to Cu(2+) ions. However, these sensors are not suitable for detection in biological samples due to the short penetration depth of UV/visible light used to excite the fluorescent probes. The use of near-infrared (NIR) light can afford penetration depths of an order of magnitude greater than that of visible light, however, a material that can convert NIR light to visible light is required. A facile method has been developed for in-depth detection of Cu(2+) ions based on fluorescence upconversion. A mesoporous silica shell is coated on upconversion nanoparticles (UCNPs) and a Cu(2+) ion sensitive fluorescent probe, rhodamine B hydrazide, is incorporated into the mesoporous silica. Upon excitation by a NIR light, the UCNPs emit visible light to excite the Cu(2+)-sensitive fluorescent probe. Because of the unique optical properties of UCNPs and their ability to convert NIR light to visible light, this is a feasible method for sensitive and in-depth detection of Cu(2+) ions in a complex biological or environmental sample due to the low autofluorescence and the high penetration depth of NIR light.
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Affiliation(s)
- Chunxia Li
- Department of Bioengineering, Faculty of Engineering, National University of Singapore, Singapore 117574
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Sun L, Li Y, Sun M, Wang H, Xu S, Zhang C, Yang Q. Porphyrin-functionalized Fe3O4@SiO2 core/shell magnetic colorimetric material for detection, adsorption and removal of Hg2+ in aqueous solution. NEW J CHEM 2011. [DOI: 10.1039/c1nj20307j] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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22
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Jung JH, Lee JH, Shinkai S. Functionalized magnetic nanoparticles as chemosensors and adsorbents for toxic metal ions in environmental and biological fields. Chem Soc Rev 2011; 40:4464-74. [PMID: 21607241 DOI: 10.1039/c1cs15051k] [Citation(s) in RCA: 235] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jong Hwa Jung
- Department of Chemistry, Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Korea.
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