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Konč J, Sabatino V, Jiménez‐Moreno E, Latocheski E, Pérez LR, Day J, Domingos JB, Bernardes GJL. Controlled In‐Cell Generation of Active Palladium(0) Species for Bioorthogonal Decaging. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Juraj Konč
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road CB2 1EW Cambridge UK
| | - Valerio Sabatino
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road CB2 1EW Cambridge UK
| | - Ester Jiménez‐Moreno
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road CB2 1EW Cambridge UK
| | - Eloah Latocheski
- LaCBio—Laboratory of Biomimetic Catalysis Department of Chemistry Federal University of Santa Catarina—UFSC Campus Trindade SC 88040–900 Florianópolis Brazil
| | - Laura Rodríguez Pérez
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road CB2 1EW Cambridge UK
| | - Jason Day
- Department of Earth Sciences University of Cambridge Downing Street CB2 3EQ Cambridge UK
| | - Josiel B. Domingos
- LaCBio—Laboratory of Biomimetic Catalysis Department of Chemistry Federal University of Santa Catarina—UFSC Campus Trindade SC 88040–900 Florianópolis Brazil
| | - Gonçalo J. L. Bernardes
- Yusuf Hamied Department of Chemistry University of Cambridge Lensfield Road CB2 1EW Cambridge UK
- Instituto de Medicina Molecular João Lobo Antunes Faculdade de Medicina Universidade de Lisboa Avenida Professor Egas Moniz 1649-028 Lisboa Portugal
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2
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Konč J, Sabatino V, Jiménez-Moreno E, Latocheski E, Pérez LR, Day J, Domingos JB, Bernardes GJL. Controlled In-Cell Generation of Active Palladium(0) Species for Bioorthogonal Decaging. Angew Chem Int Ed Engl 2021; 61:e202113519. [PMID: 34739737 DOI: 10.1002/anie.202113519] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Indexed: 11/07/2022]
Abstract
Owing to their bioorthogonality, transition metals have become very popular in the development of biocompatible bond-cleavage reactions. However, many approaches require design and synthesis of complex ligands or formulation of nanoparticles which often perform poorly in living cells. This work reports on a method for the generation of an active palladium species that triggers bond-cleaving reactions inside living cells. We utilized the water-soluble Na2PdCl4 as a simple source of Pd(II) which can be intracellularly reduced by sodium ascorbate to the active Pd(0) species. Once generated, Pd(0) triggers the cleavage of allyl ether and carbamate caging groups leading to the release of biologically active molecules. These findings do not only expand the toolbox of available bioorthogonal dissociative reactions but also provide an additional strategy for controlling the reactivity of Pd species involved in Pd-mediated bioorthogonal reactions.
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Affiliation(s)
- Juraj Konč
- University of Cambridge, Chemistry, UNITED KINGDOM
| | | | | | | | | | - Jason Day
- University of Cambridge, Earth Sciences, UNITED KINGDOM
| | | | - Gonçalo J L Bernardes
- University of Cambridge, Yusuf Hamied Department of Chemistry, Lensfield Road, CB21EW, Cambridge, UNITED KINGDOM
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3
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Al-Fakeh MS, Osman SOM, Gassoumi M, Rabhi M, Omer M. Characterization, Antimicrobial and Anticancer Properties of Palladium Nanoparticles Biosynthesized Optimally Using Saudi Propolis. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2666. [PMID: 34685107 PMCID: PMC8540078 DOI: 10.3390/nano11102666] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/30/2021] [Accepted: 10/02/2021] [Indexed: 01/09/2023]
Abstract
Due to their unique physicochemical characteristics, palladium nanoparticles (Pd-NPs) have shown tremendous promise in biological applications. The biosynthesis of Pd-NPs employing Saudi propolis has been designed to be environmental, fast, controlled, and cost-effective. The formation and stability of biosynthesized Pd-NPs by Saudi propolis extract were proved by ultraviolet-visible spectrophotometry (UV-Vis), Fourier-transform infrared spectroscopy (FT-IR), and Zeta potential analysis. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD) findings show that the average particle size of Pd-NPs is between 3.14 and 4.62 nm, which is in quantum scale. The Saudi propolis enhanced the antimicrobial activity against B. subtilis, S. aureus, E. coli, K. pneumoniae, and C. albicans. Pd-NPs show effective anticancer activity against ductal carcinoma (MCF-7) with IC50 of 104.79 µg/mL.
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Affiliation(s)
- Maged S. Al-Fakeh
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia;
- Taiz University, Taiz 3086, Republic of Yemen
| | - Samir Osman Mohammed Osman
- Department of Physics, College of Science, Ibb University, Ibb 009674, Yemen
- Engineer College, Aljanad University for Science & Technology, Taiz 009674, Yemen
| | - Malek Gassoumi
- Department of Physics, College of Science, Qassim University, P.O. 64, Buraidah 51452, Saudi Arabia;
- Unite de Recherche Matériaux Advances et Nanotechnologies, Institut Supérieur des Sciences Appliquées et de Technologie de Kasserine, Université de Kairouan, BP 471, 1200 Kasserine, Tunisia
| | - Mokded Rabhi
- Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Qassim 51452, Saudi Arabia;
| | - Mohamed Omer
- Department of Radiologic Science, College of Applied Medical Sciences, Buraidah 51452, Saudi Arabia;
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4
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Li Z, Gong Y, Zhao D, Dang Z, Lin Z. Enhanced removal of zinc and cadmium from water using carboxymethyl cellulose-bridged chlorapatite nanoparticles. CHEMOSPHERE 2021; 263:128038. [PMID: 33297055 DOI: 10.1016/j.chemosphere.2020.128038] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/11/2020] [Accepted: 08/15/2020] [Indexed: 06/12/2023]
Abstract
Zinc (Zn2+) and cadmium (Cd2+) in water pose serious threats to human health and the environment. In search for a more effective treatment technology, we prepared a type of carboxymethyl cellulose (CMC) bridged chlorapatite (CMC-CAP) nanoparticles and tested the material for removal of Zn2+ and Cd2+ from water. CMC macromolecules were attached to CAP by bidentate bridging and hydrogen bonding, preserving the high adsorption capacity of CAP nanoparticles while allowing for easy gravity-separation of the nanoparticles. CMC-CAP showed rapid adsorption kinetics and 22.8% and 11.2% higher equilibrium uptake for Zn2+ and Cd2+, respectively, than pristine CAP. An extended dual-mode isotherm model, which takes into account both sorption and chemical precipitation, provided the best fits to the sorption isotherms, giving a maximum Langmuir sorption capacity of 141.1 mg g-1 for Zn2+ and 150.2 mg g-1 for Cd2+ by CMC-CAP. Na+ at up to 5 mM showed modest effects on the uptake of the heavy metals, while 2-5 mM of Ca2+ exerted notable inhibitive effects. Dissolved organic matter (up to 5 mg L-1 as TOC) inhibited the Zn2+ uptake by 16.5% but enhanced the Cd2+ removal by 8.6%. Material characterizations and surface binding analyses revealed that ion exchange, surface precipitation, and surface complexation were the removal mechanisms for the heavy metals. This study demonstrates stabilizer bridging may serve as a convenient strategy to facilitate water treatment uses of nanoparticles.
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Affiliation(s)
- Zhiliang Li
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China; Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL, 36849, USA
| | - Yanyan Gong
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, 511443, China.
| | - Dongye Zhao
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL, 36849, USA.
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China
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5
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Lu J, Bao J, Lu X, Zheng D, Li X. Application of a Pd-TiO2 nanotube/Ti electrode prepared by atomic layer deposition to reductive dechlorination of trichloroethylene. Electrochem commun 2019. [DOI: 10.1016/j.elecom.2019.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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6
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Carrasco S, Martín‐Matute B. Hydrazine‐Free Facile Synthesis of Palladium‐Tetrakis(Triphenylphosphine). Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sergio Carrasco
- Department of Organic Chemistry, Arrhenius Laboratory Stockholm University 10691 Stockholm Sweden
| | - Belén Martín‐Matute
- Department of Organic Chemistry, Arrhenius Laboratory Stockholm University 10691 Stockholm Sweden
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7
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He F, Li Z, Shi S, Xu W, Sheng H, Gu Y, Jiang Y, Xi B. Dechlorination of Excess Trichloroethene by Bimetallic and Sulfidated Nanoscale Zero-Valent Iron. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8627-8637. [PMID: 29952547 DOI: 10.1021/acs.est.8b01735] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoscale zerovalent iron (nZVI) likely finds its application in source zone remediation. Two approaches to modify nZVI have been reported: bimetal (Fe-Me) and sulfidated nZVI (S-nZVI). However, previous research has primarily focused on enhancing particle reactivity with these two modifications under more plume-like conditions. In this study, we systematically compared the trichloroethene (TCE) dechlorination pathway, rate, and electron selectivity of Fe-Me (Me: Pd, Ni, Cu, and Ag), S-nZVI, and nZVI with excess TCE simulating source zone conditions. TCE dechlorination on Fe-Me was primarily via hydrogenolysis while that on S-nZVI and nZVI was mainly via β-elimination. The surface-area normalized TCE reduction rate ( k'SA) of Fe-Pd, S-nZVI, Fe-Ni, Fe-Cu, and Fe-Ag were ∼6800-, 190-, 130-, 20-, and 8-fold greater than nZVI. All bimetallic modification enhanced the competing hydrogen evolution reaction (HER) while sulfidation inhibited HER. Fe-Cu and Fe-Ag negligibly enhanced electron utilization efficiency (εe) while Fe-Pd, Fe-Ni, and S-nZVI dramatically increased εe from 2% to ∼100%, 69%, and 72%, respectively. Adsorbed atomic hydrogen was identified to be responsible for the TCE dechlorination on Fe-Me but not on S-nZVI. The enhanced dechlorination rate along with the reduced HER of S-nZVI can be explained by that FeS conducting major electrons mediated TCE dechlorination while Fe oxides conducting minor electrons mediated HER.
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Affiliation(s)
- Feng He
- College of Environment , Zhejiang University of Technology , Hangzhou 310014 , China
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Zhenjie Li
- College of Environment , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Shasha Shi
- College of Environment , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Wenqiang Xu
- College of Environment , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Hanzhen Sheng
- College of Environment , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Yawei Gu
- College of Environment , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Yonghai Jiang
- State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China
- State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China
| | - Beidou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China
- State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China
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8
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Janiszewska E, Zieliński M, Kot M, Kowalewski E, Śrębowata A. Aqueous-Phase Hydrodechlorination of Trichloroethylene on Ir Catalysts Supported on SBA-3 Materials. ChemCatChem 2018. [DOI: 10.1002/cctc.201800873] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ewa Janiszewska
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89B Poznań 61-614 Poland
| | - Michał Zieliński
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89B Poznań 61-614 Poland
| | - Monika Kot
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89B Poznań 61-614 Poland
| | - Emil Kowalewski
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 Warszawa 01-224 Poland
| | - Anna Śrębowata
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 Warszawa 01-224 Poland
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9
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Dos Santos Corrêa A, Contreras LA, Keijok WJ, Barcelos DHF, Pereira ACH, Kitagawa RR, Scherer R, de Oliveira Gomes DC, da Silva AR, Endringer DC, de Oliveira JP, Guimarães MCC. Virola oleifera-capped gold nanoparticles showing radical-scavenging activity and low cytotoxicity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 91:853-858. [PMID: 30033320 DOI: 10.1016/j.msec.2018.06.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 05/19/2018] [Accepted: 06/10/2018] [Indexed: 01/09/2023]
Abstract
The development of effective nanoparticle therapeutics has been hindered by their surface characteristics, such as hydrophobicity and charge. Therefore, the success of biomedical applications with nanoparticles is governed by the control of these characteristics. In this article, we report an efficient green capping method for gold nanoparticles (AuNPs) by a reduction with sodium citrate and capping with Virola oleifera (Vo), which is a green exudate rich in polyphenols and flavonoids. The Vo-capped AuNPs were characterized by UV, DLS, FTIR, Raman, TEM, DPPH, FRAP and their cytotoxicity was evaluated on the viability of Murine macrophage cell. The AuNPs had an average particle size of 15 nm and were stable over a long time, as indicated by their unchanged SPR and zeta potential values. These nanoparticles were assessed for their antioxidant potential using DPPH and FRAP and demonstrated the highest antioxidant activities and low cytotoxicity. We propose that the Virola oleifera-capped AuNPs have potential biomedical applications.
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Affiliation(s)
| | | | | | | | | | | | - Rodrigo Scherer
- Post-Graduated Program of Pharmaceutical Sciences University, Vila Velha, ES, Brazil
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10
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Antibacterial and cytotoxicity effects of biogenic palladium nanoparticles synthesized using fruit extract of Couroupita guianensis Aubl. J Appl Biomed 2018. [DOI: 10.1016/j.jab.2017.10.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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11
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Rubio-Ruiz B, Pérez-López AM, Bray TL, Lee M, Serrels A, Prieto M, Arruebo M, Carragher NO, Sebastián V, Unciti-Broceta A. High-Precision Photothermal Ablation Using Biocompatible Palladium Nanoparticles and Laser Scanning Microscopy. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3341-3348. [PMID: 29320154 PMCID: PMC5799879 DOI: 10.1021/acsami.7b17282] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Herein, we report a straightforward method for the scalable preparation of Pd nanoparticles (Pd-NPs) with reduced inherent cytotoxicity and high photothermal conversion capacity. These Pd-NPs are rapidly taken up by cells and able to kill labeled cancer cells upon short exposure to near-infrared (NIR) light. Following cell treatment with Pd-NPs, ablated areas were patterned with high precision by laser scanning microscopy, allowing one to perform cell migration assays with unprecedented accuracy. Using coherent Raman microscopy, cells containing Pd-NPs were simultaneously ablated and imaged. This novel methodology was combined with intravital imaging to mediate microablation of cancerous tissue in tumor xenografts in mice.
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Affiliation(s)
- Belén Rubio-Ruiz
- Cancer Research
UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, United Kingdom
| | - Ana M. Pérez-López
- Cancer Research
UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, United Kingdom
| | - Thomas L. Bray
- Cancer Research
UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, United Kingdom
| | - Martin Lee
- Cancer Research
UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, United Kingdom
| | - Alan Serrels
- MRC Centre for Inflammation Research, Queen’s Medical Research
Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Martín Prieto
- Department of Chemical Engineering, Aragon
Institute of Nanoscience (INA), University
of Zaragoza, Campus Río
Ebro-Edificio I+D, c/Poeta Mariano Esquillor s/n, 50018 Zaragoza, Spain
| | - Manuel Arruebo
- Department of Chemical Engineering, Aragon
Institute of Nanoscience (INA), University
of Zaragoza, Campus Río
Ebro-Edificio I+D, c/Poeta Mariano Esquillor s/n, 50018 Zaragoza, Spain
- Networking
Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Neil O. Carragher
- Cancer Research
UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, United Kingdom
| | - Víctor Sebastián
- Department of Chemical Engineering, Aragon
Institute of Nanoscience (INA), University
of Zaragoza, Campus Río
Ebro-Edificio I+D, c/Poeta Mariano Esquillor s/n, 50018 Zaragoza, Spain
- Networking
Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Asier Unciti-Broceta
- Cancer Research
UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, United Kingdom
- E-mail: . Phone: 0044 131 6518500
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12
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Green carboxymethyl cellulose-silver complex versus cellulose origins in biological activity applications. Int J Biol Macromol 2017; 107:1364-1372. [PMID: 29155155 DOI: 10.1016/j.ijbiomac.2017.11.061] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 10/26/2017] [Accepted: 11/09/2017] [Indexed: 01/24/2023]
Abstract
This article deals with evaluating the role of cellulose origin, from wood and non-wood, on preparing green CMC-Ag complex as biological active agent. Viscose pulp as well as bagasse and rice straw pulps were used in preparation of CMCs, followed by complexation with AgNO3. The complex structure (free-Ag, IR-spectra and TGA), morphology (TEM), antibiological and anti-tumor activities were studied. The data revealed that, the main interaction between CMC and silver is occurred via carboxylate groups and ether link of 1ry alcohol, with formation stable 5-membered ring structure. For the case of RS-based CMC-Ag complex the interaction between COO groups and silica included RS is also possible, via hydrogen bonds. These complexes have anti-biological especially towards gram positive bacteria (B.subtilis, NCID-3610), and uni- and multi cellular fungi. AgNPs from viscose (VCMC-Ag complex) has relatively higher anti-tumor activity for breast cancer MCF-7 in vitro than bagasse-based CMC-Ag complex (BCMC-Ag complex) with IC50 128μg/ml (as Ag). It is interesting to note that; viscose-based CMC-Ag complex (VCMC-Ag) has higher efficient behaviour as bioactive agent than literature reported agents, e.g., Pyridine derivative (∼300μg/ml).
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13
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Si J, Ouyang W, Zhang Y, Xu W, Zhou J. Novel nano-semiconductor film layer supported nano-Pd Complex Nanostructured Catalyst Pd/Ⓕ-MeO x/AC for High Efficient Selective Hydrogenation of Phenol to Cyclohexanone. Sci Rep 2017; 7:1254. [PMID: 28455504 PMCID: PMC5430673 DOI: 10.1038/s41598-017-01255-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 03/28/2017] [Indexed: 11/16/2022] Open
Abstract
Supported metal as a type of heterogeneous catalysts are the most widely used in industrial processes. High dispersion of the metal particles of supported catalyst is a key factor in determining the performance of such catalysts. Here we report a novel catalyst Pd/Ⓕ-MeOx/AC with complex nanostructured, Pd nanoparticles supported on the platelike nano-semiconductor film/activated carbon, prepared by the photocatalytic reduction method, which exhibited high efficient catalytic performance for selective hydrogenation of phenol to cyclohexanone. Conversion of phenol achieved up to more than 99% with a lower mole ratio (0.5%) of active components Pd and phenol within 2 h at 70 °C. The synergistic effect of metal nanoparticles and nano-semiconductors support layer and the greatly increasing of contact interface of nano-metal-semiconductors may be responsible for the high efficiency. This work provides a clear demonstration that complex nanostructured catalysts with nano-metal and nano-semiconductor film layer supported on high specific surface AC can yield enhanced catalytic activity and can afford promising approach for developing new supported catalyst.
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Affiliation(s)
- Jiaqi Si
- Key Laboratory of Green Catalysis and Chemical Reaction Engineering of Hunan Province, School of Chemical Engineering Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Wenbing Ouyang
- Key Laboratory of Green Catalysis and Chemical Reaction Engineering of Hunan Province, School of Chemical Engineering Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Yanji Zhang
- Key Laboratory of Green Catalysis and Chemical Reaction Engineering of Hunan Province, School of Chemical Engineering Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Wentao Xu
- Key Laboratory of Green Catalysis and Chemical Reaction Engineering of Hunan Province, School of Chemical Engineering Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Jicheng Zhou
- Key Laboratory of Green Catalysis and Chemical Reaction Engineering of Hunan Province, School of Chemical Engineering Xiangtan University, Xiangtan, 411105, Hunan Province, China.
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14
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Huo L, Zeng X, Su S, Bai L, Wang Y. Enhanced removal of As (V) from aqueous solution using modified hydrous ferric oxide nanoparticles. Sci Rep 2017; 7:40765. [PMID: 28098196 PMCID: PMC5241682 DOI: 10.1038/srep40765] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 12/12/2016] [Indexed: 11/09/2022] Open
Abstract
Hydrous ferric oxide (HFO) is most effective with high treatment capacity on arsenate [As(V)] sorption although its transformation and aggregation nature need further improvement. Here, HFO nanoparticles with carboxymethyl cellulose (CMC) or starch as modifier was synthesized for the purpose of stability improvement and As(V) removal from water. Comparatively, CMC might be the optimum stabilizer for HFO nanoparticles because of more effective physical and chemical stability. The large-pore structure, high surface specific area, and the non-aggregated nature of CMC-HFO lead to increased adsorption sites, and thus high adsorption capacities of As(V) without pre-treatment (355 mg·g-1), which is much greater than those reported in previous studies. Second-order equation and dual-mode isotherm model could be successfully used to interpret the sorption kinetics and isotherms of As(V), respectively. FTIR, XPS and XRD analyses suggested that precipitation and surface complexation were primary mechanisms for As(V) removal by CMC modified HFO nanoparticles. A surface complexation model (SCM) was used to simulate As adsorption over pH 2.5-10.4. The predominant adsorbed arsenate species were modeled as bidentate binuclear surface complexes at low pH and as monodentate complexes at high pH. The immobilized arsenic remained stable when aging for 270 d at room temperature.
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Affiliation(s)
- Lijuan Huo
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- College of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan, Shanxi, 030024, China
| | - Xibai Zeng
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Shiming Su
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Lingyu Bai
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yanan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
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15
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Zhao X, Liu W, Cai Z, Han B, Qian T, Zhao D. An overview of preparation and applications of stabilized zero-valent iron nanoparticles for soil and groundwater remediation. WATER RESEARCH 2016; 100:245-266. [PMID: 27206054 DOI: 10.1016/j.watres.2016.05.019] [Citation(s) in RCA: 287] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 05/03/2016] [Accepted: 05/05/2016] [Indexed: 06/05/2023]
Abstract
Nano-scale zero-valent iron (nZVI) is one of the most intensively studied materials for environmental cleanup uses over the past 20 years or so. Freshly prepared nZVI is highly reactive due to its high specific surface area and strong reducing power. Over years, the classic borohydride reduction method for preparing nZVI has been modified by use of various stabilizers or surface modifiers to acquire more stable and soil deliverable nZVI for treatment of different organic and inorganic contaminants in water and soil. While most studies have been focused on testing nZVI for water treatment, the greater potential or advantage of nZVI appears to be for in situ remediation of contaminated soil and groundwater by directly delivering stabilized nZVI into the contaminated subsurface as it was proposed from the beginning. Compared to conventional remediation practices, the in situ remediation technique using stabilized nZVI offers some unique advantages. This work provides an update on the latest development of stabilized nZVI for various environmental cleanup uses, and overviews the evolution and environmental applications of stabilized nZVI. Commonly used stabilizers are compared and the stabilizing mechanisms are discussed. The effectiveness and constraints of the nZVI-based in situ remediation technology are summarized. This review also reveals some critical knowledge gaps and research needs, such as interactions between delivered nZVI and the local biogeochemical conditions.
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Affiliation(s)
- Xiao Zhao
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
| | - Wen Liu
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
| | - Zhengqing Cai
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
| | - Bing Han
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
| | - Tianwei Qian
- Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, PR China
| | - Dongye Zhao
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA; Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, PR China.
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16
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Wang R, Yao Y, Shen M, Wang X. Green synthesis of Au@Ag nanostructures through a seed-mediated method and their application in SERS. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.11.076] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Ahmed S, Ahmad M, Swami BL, Ikram S. A review on plants extract mediated synthesis of silver nanoparticles for antimicrobial applications: A green expertise. J Adv Res 2016. [PMID: 26843966 DOI: 10.1016/j.cogsc.2018.06.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023] Open
Abstract
Metallic nanoparticles are being utilized in every phase of science along with engineering including medical fields and are still charming the scientists to explore new dimensions for their respective worth which is generally attributed to their corresponding small sizes. The up-and-coming researches have proven their antimicrobial significance. Among several noble metal nanoparticles, silver nanoparticles have attained a special focus. Conventionally silver nanoparticles are synthesized by chemical method using chemicals as reducing agents which later on become accountable for various biological risks due to their general toxicity; engendering the serious concern to develop environment friendly processes. Thus, to solve the objective; biological approaches are coming up to fill the void; for instance green syntheses using biological molecules derived from plant sources in the form of extracts exhibiting superiority over chemical and/or biological methods. These plant based biological molecules undergo highly controlled assembly for making them suitable for the metal nanoparticle syntheses. The present review explores the huge plant diversity to be utilized towards rapid and single step protocol preparatory method with green principles over the conventional ones and describes the antimicrobial activities of silver nanoparticles.
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Affiliation(s)
- Shakeel Ahmed
- Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Mudasir Ahmad
- Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Babu Lal Swami
- Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Saiqa Ikram
- Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
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18
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Romashov LV, Khemchyan LL, Gordeev EG, Koshevoy IO, Tunik SP, Ananikov VP. Design of a Bimetallic Au/Ag System for Dechlorination of Organochlorides: Experimental and Theoretical Evidence for the Role of the Cluster Effect. Organometallics 2014. [DOI: 10.1021/om500620u] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Leonid V. Romashov
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Levon L. Khemchyan
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Evgeniy G. Gordeev
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Igor O. Koshevoy
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof 198504, Russia
- Department
of Chemistry, University of Eastern Finland, Joensuu 80101, Finland
| | - Sergey P. Tunik
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof 198504, Russia
| | - Valentine P. Ananikov
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof 198504, Russia
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19
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Xu H, Chen G, Jin R, Chen D, Wang Y, Pei J, Yan C, Zhang Y, Qiu Z. Enhancement of the Seebeck Coefficient in Stacked Bi
2
Se
3
Nanoplates by Energy Filtering. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Haiming Xu
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Gang Chen
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Rencheng Jin
- School of Chemistry & Materials Science, Ludong University, 186 Hongqi Road, Yantai, Shandong Province 264025, P. R. China
| | - Dahong Chen
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Yu Wang
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Jian Pei
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Chunshuang Yan
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Yongqiang Zhang
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
| | - Zhuangzhuang Qiu
- Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China, http://homepage.hit.edu.cn/pages/chengang
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20
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Amornkitbamrung L, Pienpinijtham P, Thammacharoen C, Ekgasit S. Palladium nanoparticles synthesized by reducing species generated during a successive acidic/alkaline treatment of sucrose. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:186-192. [PMID: 24309181 DOI: 10.1016/j.saa.2013.10.095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 08/09/2013] [Accepted: 10/23/2013] [Indexed: 06/02/2023]
Abstract
Uniform spherical palladium nanoparticles with an average particle size of 4.3±0.5 nm were successfully synthesized by reducing H2PdCl4 with intermediates in situ generated during a successive acidic/alkaline treatment of sucrose. A successive acidic/alkaline treatment plays an important role on converting the non-reducing sucrose into efficient reducing species containing aldehyde functionality. The Benedict's test corroborates the development and vanishing of the in situ generated reducing species upon prolonged degradation. An increase in alkalinity drastically improves the reduction efficiency. ATR FT-IR spectroscopy indicated spontaneous development of carboxylate after the alkaline treatment. Under the employed condition, small organic species with carbonyl groups (aldehyde, acid, and acid salt) were generated through the sucrose degradation before being oxidized to carbonate after an hour of the treatment. Sucrose was completely decomposed into carbonate after a 24-h successive acidic/alkaline treatment. The synthesized palladium nanoparticles express a good catalytic activity in the decolorization process of Congo red by sodium borohydride.
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Affiliation(s)
- Lunjakorn Amornkitbamrung
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand
| | - Prompong Pienpinijtham
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand
| | - Chuchaat Thammacharoen
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand
| | - Sanong Ekgasit
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand.
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21
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Xu H, Chen G, Jin R, Chen D, Wang Y, Pei J. Green synthesis of Bi2Se3 hierarchical nanostructure and its electrochemical properties. RSC Adv 2014. [DOI: 10.1039/c3ra46473c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Determination of Cu, As, Hg and Pb in vegetable oils by electrothermal vaporization inductively coupled plasma mass spectrometry with palladium nanoparticles as modifier. Talanta 2013; 117:268-72. [DOI: 10.1016/j.talanta.2013.09.013] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 09/05/2013] [Accepted: 09/06/2013] [Indexed: 11/22/2022]
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23
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Zhang M, Bacik DB, Roberts CB, Zhao D. Catalytic hydrodechlorination of trichloroethylene in water with supported CMC-stabilized palladium nanoparticles. WATER RESEARCH 2013; 47:3706-3715. [PMID: 23726707 DOI: 10.1016/j.watres.2013.04.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 04/13/2013] [Accepted: 04/15/2013] [Indexed: 06/02/2023]
Abstract
In this work, we developed and tested a new class of supported Pd catalysts by immobilizing CMC (carboxymethyl cellulose) stabilized Pd nanoparticles onto alumina support. The alumina supported Pd nanoparticles were able to facilitate rapid and complete hydrodechlorination of TCE (trichloroethylene) without intermediate by-products detected. With a Pd mass loading of 0.33 wt% of the alumina mass, the observed pseudo first order reaction rate constant, k(obs), for the catalyst was increased from 28 to 109 L/min/g when CMC concentration was raised from 0.005 to 0.15 wt%. The activity increase was in accord with an increase of the Pd dispersion (measured via CO chemisorption) from 30.4% to 45.1%. Compared to the commercial alumina supported Pd, which has a lower Pd dispersion of 21%, our CMC-stabilized Pd nanoparticles offered more than 7 times greater activity. Pre-calcination treatment of the supported catalyst resulted in minor drop in activity, yet greatly reduced bleeding (<6%) of the Pd nanoparticles from the support during multiple cycles of applications. The presence of DOM (dissolved organic matter) at up to 10 mg/L as TOC had negligible effect on the catalytic activity. The alumina supported CMC-stabilized Pd nanoparticles may serve as a class of more effective catalysts for water treatment uses.
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Affiliation(s)
- Man Zhang
- Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA
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24
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Xie W, Yuan S, Mao X, Hu W, Liao P, Tong M, Alshawabkeh AN. Electrocatalytic activity of Pd-loaded Ti/TiO2 nanotubes cathode for TCE reduction in groundwater. WATER RESEARCH 2013; 47:3573-82. [PMID: 23726693 PMCID: PMC6321742 DOI: 10.1016/j.watres.2013.04.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 03/29/2013] [Accepted: 04/01/2013] [Indexed: 05/11/2023]
Abstract
A novel cathode, Pd loaded Ti/TiO2 nanotubes (Pd-Ti/TiO2NTs), is synthesized for the electrocatalytic reduction of trichloroethylene (TCE) in groundwater. Pd nanoparticles are successfully loaded on TiO2 nanotubes which grow on Ti plate via anodization. Using Pd-Ti/TiO2NTs as the cathode in an undivided electrolytic cell, TCE is efficiently and quantitatively transformed to ethane. Under conditions of 100 mA and pH 7, the removal efficiency of TCE (21 mg/L) is up to 91% within 120 min, following pseudo-first-order kinetics with the rate constant of 0.019 min(-1). Reduction rates increase from 0.007 to 0.019 min(-1) with increasing the current from 20 to 100 mA, slightly decrease in the presence of 10 mM chloride or bicarbonate, and decline with increasing the concentrations of sulfite or sulfide. O2 generated at the anode slightly influences TCE reduction. At low currents, TCE is mainly reduced by direct electron transfer on the Pd-Ti/TiO2NT cathode. However, the contribution of Pd-catalytic hydrodechlorination, an indirect reduction mechanism, becomes significant with increasing the current. Compared with other common cathodes, i.e., Ti-based mixed metal oxides, graphite and Pd/Ti, Pd-Ti/TiO2NTs cathode shows superior performance for TCE reduction.
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Affiliation(s)
- Wenjing Xie
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
| | - Songhu Yuan
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
- Corresponding author. Tel.: +86 18971623175., , (S. Yuan)
| | - Xuhui Mao
- School of resource and Environmental Science, Wuhan University, 129 Luoyu Road, Wuhan 430079, PR China
| | - Wei Hu
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
| | - Peng Liao
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
| | - Man Tong
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
| | - Akram N. Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA 02115, United States
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25
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Meena Kumari M, Aromal SA, Philip D. Synthesis of monodispersed palladium nanoparticles using tannic acid and its optical non-linearity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:130-133. [PMID: 23257340 DOI: 10.1016/j.saa.2012.11.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 11/02/2012] [Accepted: 11/05/2012] [Indexed: 06/01/2023]
Abstract
Palladium nanoparticles with average size 11.3 nm have been synthesized via a one-step reduction and capping method. This colloidal route using tannic acid does not require any other surfactant or capping agent to direct the growth of palladium nanoparticles. The effect of temperature on the conversion of Pd(2+) ion to Pd(0) is investigated. The growth process of nanoparticles is monitored using UV-visible spectra. The morphology and phase transformation have been confirmed by transmission electron microscopy and X-ray diffraction. An attempt to reveal the capping mechanism of tannic acid is done through FTIR analysis. The optical non-linearity of the samples was studied using open aperture Z-scan technique. The significance of this protocol for the generation of environmentally benign palladium nanoparticles lies mainly in its simplicity and cost effectiveness.
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Affiliation(s)
- M Meena Kumari
- Department of Physics, Mar Ivanios College, Thiruvananthapuram 695 015, India
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26
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Johnson RL, Nurmi JT, O'Brien Johnson GS, Fan D, O'Brien Johnson RL, Shi Z, Salter-Blanc AJ, Tratnyek PG, Lowry GV. Field-scale transport and transformation of carboxymethylcellulose-stabilized nano zero-valent iron. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:1573-80. [PMID: 23311327 DOI: 10.1021/es304564q] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The fate of nano zerovalent iron (nZVI) during subsurface injection was examined using carboxymethylcellulose (CMC) stabilized nZVI in a very large three-dimensional physical model aquifer with detailed monitoring using multiple, complementary detection methods. A fluorescein tracer test in the aquifer plus laboratory column data suggested that the very-aggressive flow conditions necessary to achieve 2.5 m of nZVI transport could be obtained using a hydraulically constrained flow path between injection and extraction wells. However, total unoxidized nZVI was transported only about 1 m and <2% of the injected nZVI concentration reached that distance. The experimental data also indicated that groundwater flow changed during injection, likely due to hydrogen bubble formation, which diverted the nZVI away from the targeted flow path. The leading edge of the iron plume became fully oxidized during transport. However, within the plume, oxidation of nZVI decreased in a fashion consistent with progressive depletion of aquifer "reductant demand". To directly quantify the extent of nZVI transport, a spectrophotometric method was developed, and the results indicated that deployment of unoxidized nZVI for groundwater remediation will likely be difficult.
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Affiliation(s)
- Richard L Johnson
- Institute of Environmental Health, Oregon Health & Science University, 20000 NW Walker Road, Beaverton, Oregon 97006, United States.
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27
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Kang H, Liu R, Huang Y. Cellulose derivatives and graft copolymers as blocks for functional materials. POLYM INT 2013. [DOI: 10.1002/pi.4455] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Hongliang Kang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Ruigang Liu
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yong Huang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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28
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Zhang L, Wang L, Jiang Z, Xie Z. Synthesis of size-controlled monodisperse Pd nanoparticles via a non-aqueous seed-mediated growth. NANOSCALE RESEARCH LETTERS 2012; 7:312. [PMID: 22713177 PMCID: PMC3462717 DOI: 10.1186/1556-276x-7-312] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 06/08/2012] [Indexed: 05/23/2023]
Abstract
We demonstrated that stepwise seed-mediated growth could be extended in non-aqueous solution (solvothermal synthesis) and improved as an effective method for controlling the uniform size of palladium nanoparticles (Pd NPs) in a wide range. The monodisperse Pd NPs with the size of about 5 nm were synthesized by simply reducing Pd(acac)2 with formaldehyde in different organic amine solvents. By an improved stepwise seed-mediated synthesis, the size of the monodisperse Pd NPs can be precisely controlled from approximately 5 to 10 nm. The as-prepared Pd NPs could self assemble to well-shaped superlattice crystal without size selection process.
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Affiliation(s)
- Lei Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Lin Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhiyuan Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhaoxiong Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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29
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Zheng M, Bao J, Liao P, Wang K, Yuan S, Tong M, Long H. Electrogeneration of H(2) for Pd-catalytic hydrodechlorination of 2,4-dichlorophenol in groundwater. CHEMOSPHERE 2012; 87:1097-1104. [PMID: 22377173 DOI: 10.1016/j.chemosphere.2012.01.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 01/30/2012] [Accepted: 01/30/2012] [Indexed: 05/31/2023]
Abstract
A novel electrolytic groundwater remediation process, which used the H(2) continuously generated at cathode to achieve in situ catalytic hydrodechlorination, was developed for the treatment of 2,4-dichlorophenol (2,4-DCP) in groundwater. Catalytic hydrodechlorination using Pd supported on bamboo charcoal and external H(2) showed that 2,4-DCP was completely dechlorinated to phenol within 30 min at pH ≤ 5.5. In a divided electrolytic system, the catalytic hydrodechlorination of 2,4-DCP in cathodic compartment by H(2) generated at the cathode under 20 and 50 mA reached 100% at 120 and 60 min, respectively. Two column experiments with influent pHs of 5.5 (unconditioned) and 2 were conducted to evaluate the feasibility of this process. The 2,4-DCP removal efficiencies were about 63% and nearly 100% at influent pHs of 5.5 and 2, respectively. Phenol was solely produced by 2,4-DCP hydrodechlorination, and was subsequently degraded at the anode. A low pH could enhance the hydrodechlorination, but was not necessarily required. This study provides the preliminary results of a novel effective electrolytic process for the remediation of groundwater contaminated by chlorinated aromatics.
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Affiliation(s)
- Mingming Zheng
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, PR China
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30
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Sheny DS, Philip D, Mathew J. Rapid green synthesis of palladium nanoparticles using the dried leaf of Anacardium occidentale. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 91:35-38. [PMID: 22349890 DOI: 10.1016/j.saa.2012.01.063] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
A rapid, one pot and biogenic fabrication of Pd nanoparticles is reported. Pd nanoparticles of size below 5 nm size are synthesized using the dried leaf powder of Anacardium occidentale. Rapid reduction results in the formation of spherical particles. The nanoparticles are characterized by XRD, TEM, UV-visible and FTIR analysis. The absorption spectra have continua which are characteristic of Pd nanoparticles. The broad nature of the XRD pattern arising due to reflections from the (111), (200), (220), (311) and (222) planes indicate crystallinity of the nanoparticles with face centered cubic (fcc) structure. The morphology and shape of the nanoparticles are obtained by analyzing TEM images. Most of the nanoparticles are spherical with size in the range 2.5 and 4.5 nm. FTIR spectra of dried Pd nanoparticles, native and treated dried leaf powder have been analyzed to find out the biomolecule responsible for the reduction of Pd(2+) and capping of the palladium nanoparticles. The possible mechanism of formation of the nanoparticles is suggested.
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Affiliation(s)
- D S Sheny
- Department of Physics, Mar Ivanios College, Thiruvananthapuram 695 015, Kerala, India
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31
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Smuleac V, Varma R, Baruwati B, Sikdar S, Bhattacharyya D. Nanostructured membranes for enzyme catalysis and green synthesis of nanoparticles. CHEMSUSCHEM 2011; 4:1773-7. [PMID: 22086852 DOI: 10.1002/cssc.201100211] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 07/06/2011] [Indexed: 05/03/2023]
Abstract
Macroporous membranes functionalized with ionizable macromolecules provide promising applications in high capacity toxic metal capture, nanoparticle syntheses, and catalysis. Our low-pressure membrane approach has good reaction and separation selectivities, which are tunable by varying pH, ionic strength, or pressure. The sustainable green chemistry approach under ambient conditions and the evaluation of a reactive poly(acrylic acid) (PAA)-modified polyvinylidene fluoride (PVDF) membrane is described. Two distinct membrane types were obtained through different methods: 1) a stacked membrane through layer-by-layer assembly for the incorporation of enzymes (catalase and glucose oxidase), providing tunable product yields and 2) Fe/Pd nanoparticles for degradation of pollutants, obtained through an in situ green synthesis. Bioreactor-nanodomain interactions and mixed matrix nanocomposite membranes provide remarkable versatility compared to conventional membranes.
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Affiliation(s)
- Vasile Smuleac
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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32
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Smuleac V, Varma R, Sikdar S, Bhattacharyya D. Green Synthesis of Fe and Fe/Pd Bimetallic Nanoparticles in Membranes for Reductive Degradation of Chlorinated Organics. J Memb Sci 2011; 379:131-137. [PMID: 22228920 PMCID: PMC3252031 DOI: 10.1016/j.memsci.2011.05.054] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Membranes containing reactive nanoparticles (Fe and Fe/Pd) immobilized in a polymer film (polyacrylic acid, PAA-coated polyvinylidene fluoride, PVDF membrane) are prepared by a new method. In the present work a biodegradable, non-toxic -"green" reducing agent, green tea extract was used for nanoparticle (NP) synthesis, instead of the well-known sodium borohydride. Green tea extract contains a number of polyphenols that can act as both chelating/reducing and capping agents for the nanoparticles. Therefore, the particles are protected from oxidation and aggregation, which increases their stability and longevity. The membrane supported NPs were successfully used for the degradation of a common and highly important pollutant, trichloroethylene (TCE). The rate of TCE degradation was found to increase linearly with the amount of Fe immobilized on the membrane, the surface normalized rate constant (k(SA)) being 0.005 L/m(2)h. The addition of a second catalytic metal, Pd, to form bimetallic Fe/Pd increased the k(SA) value to 0.008 L/m(2)h. For comparison purposes, Fe and Fe/Pd nanoparticles were synthesized in membranes using sodium borohydride as a reducing agent. Although the initial k(SA) values for this case (for Fe) are one order of magnitude higher than the tea extract synthesized NPs, the rapid oxidation reduced their reactivity to less than 20 % within 4 cycles. For the green tea extract NPs, the initial reactivity in the membrane domain was preserved even after 3 months of repeated use. The reactivity of TCE was verified with "real" water system.
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Affiliation(s)
- V. Smuleac
- Dept. of Chemical and Materials Engineering, University of Kentucky Lexington, KY 40506 USA
| | - R. Varma
- Sustainable Technology Division, National Risk Management Research Lab/USEPA Cincinnati, OH 45268 USA
| | - S. Sikdar
- Sustainable Technology Division, National Risk Management Research Lab/USEPA Cincinnati, OH 45268 USA
| | - D. Bhattacharyya
- Dept. of Chemical and Materials Engineering, University of Kentucky Lexington, KY 40506 USA
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Butun S, Ince FG, Erdugan H, Sahiner N. One-step fabrication of biocompatible carboxymethyl cellulose polymeric particles for drug delivery systems. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.05.001] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Virkutyte J, Varma RS. Green synthesis of metal nanoparticles: Biodegradable polymers and enzymes in stabilization and surface functionalization. Chem Sci 2011. [DOI: 10.1039/c0sc00338g] [Citation(s) in RCA: 299] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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