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Xiao L, Isner AB, Hilt JZ, Bhattacharyya D. Temperature Responsive Hydrogel with Reactive Nanoparticles. J Appl Polym Sci 2012; 128:1804-1814. [PMID: 30518988 DOI: 10.1002/app.38335] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The application of temperature responsive hydrogels with ion-exchange domain for nanoscale catalytic reactions is an emerging and attractive area because of the combination of individual unique features: temperature responsive tunability by the polymer domain and the high catalytic reactivity of the nanomaterial. Here, we report the entrapment and/or direct synthesis of reactive Fe and Fe/Pd nanoparticles (about 40-70 nm) in a temperature responsive hydrogel network (N-isopropylacrylamide (NIPAAm), and NIPAAm-PAA). These nanoparticles are stabilized in the hydrogel network and the dechlorination (using trichloroethylene, TCE, as a model compound) reactivity in water is enhanced and controllable in the temperature range of 30-34°C involving polymer domain transitions at lower critical solution temperature (LCST) from hydrophilic to collapsed hydrophobic state. Water fraction modulation of the network and the enhancement of pollutant partitioning by the thermally responsive polymers play an important role in the catalytic activity.
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Affiliation(s)
- Li Xiao
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Austin B Isner
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
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Wu BZ, Chen HY, Wang SJ, Wai CM, Liao W, Chiu K. Reductive dechlorination for remediation of polychlorinated biphenyls. CHEMOSPHERE 2012; 88:757-768. [PMID: 22572168 DOI: 10.1016/j.chemosphere.2012.03.056] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 03/06/2012] [Accepted: 03/18/2012] [Indexed: 05/31/2023]
Abstract
Technologies such as thermal, oxidative, reductive, and microbial methods for the remediation of polychlorinated biphenyls (PCBs) have previously been reviewed. Based on energy consumption, formation of PCDD/F, and remediation efficiency, reductive methods have emerged as being advantageous for remediation of PCBs. However, many new developments in this field have not been systematically reviewed. Therefore, reductive technologies published in the last decade related to remediation of PCBs will be reviewed here. Three categories, including catalytic hydrodechlorination with H(2), Fe-based reductive dechlorination, and other reductive dechlorination methods (e.g., hydrogen-transfer dechlorination, base-catalyzed dechlorination, and sodium dispersion) are specifically reviewed. In addition, the advantages of each remediation technology are discussed. In this review, 108 articles are referenced.
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Affiliation(s)
- Ben-Zen Wu
- Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan, ROC
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53
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Gui M, Smuleac V, Ormsbee LE, Sedlak DL, Bhattacharyya D. Iron oxide nanoparticle synthesis in aqueous and membrane systems for oxidative degradation of trichloroethylene from water. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2012; 14:861. [PMID: 31130817 PMCID: PMC6532989 DOI: 10.1007/s11051-012-0861-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The potential for using hydroxyl radical (OH•) reactions catalyzed by iron oxide nanoparticles (NPs) to remediate toxic organic compounds was investigated. Iron oxide NPs were synthesized by controlled oxidation of iron NPs prior to their use for contaminant oxidation (by H2O2 addition) at near-neutral pH values. Cross-linked polyacrylic acid (PAA) functionalized polyvinylidene fluoride (PVDF) microfiltration membranes were prepared by in situ polymerization of acrylic acid inside the membrane pores. Iron and iron oxide NPs (80-100 nm) were directly synthesized in the polymer matrix of PAA/PVDF membranes, which prevented the agglomeration of particles and controlled the particle size. The conversion of iron to iron oxide in aqueous solution with air oxidation was studied based on X-ray diffraction, Mössbauer spectroscopy and BET surface area test methods. Trichloroethylene (TCE) was selected as the model contaminant because of its environmental importance. Degradations of TCE and H2O2 by NP surface generated OH• were investigated. Depending on the ratio of iron and H2O2, TCE conversions as high as 100 % (with about 91 % dechlorination) were obtained. TCE dechlorination was also achieved in real groundwater samples with the reactive membranes.
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Affiliation(s)
- Minghui Gui
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Vasile Smuleac
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Lindell E Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - David L Sedlak
- Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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54
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Anuraj N, Bhattacharjee S, Geiger JH, Baker GL, Bruening ML. An all-aqueous route to polymer brush-modified membranes with remarkable permeabilites and protein capture rates. J Memb Sci 2012; 389:117-125. [PMID: 22287817 DOI: 10.1016/j.memsci.2011.10.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Microporous membranes are attractive for protein purification because convection rapidly brings proteins to binding sites. However, the low binding capacity of such membranes limits their applications. This work reports a rapid, aqueous procedure to create highly permeable, polymer brush-modified membranes that bind large amounts of protein. The synthetic method includes a 10-min adsorption of a macroinitiator in a hydroxylated nylon membrane and a subsequent 5-min aqueous atom transfer radical polymerization of 2-(methacryloyloxy)ethyl succinate from the immobilized initiator to form poly(acid) brushes. This procedure likely leads to more swollen, less dense brushes than polymerization from silane initiators, and thus requires less polymer to achieve the same binding capacity. The hydraulic permeability of the poly(acid) membranes is 4-fold higher than that of similar membranes prepared by growing brushes from immobilized silane initiators. These brush-containing nylon membranes bind 120 mg/cm(3) of lysozyme using solution residence times as short as 35 ms, and when functionalized with nitrilotriacetate (NTA)-Ni(2+) complexes, they capture 85 mg/cm(3) of histidine(6)-tagged (His-tagged) Ubiquitin. Additionally the NTA-Ni(2+)-functionalized membranes isolate His-tagged myo-inositol-1-phosphate synthase directly from cell extracts and show >90% recovery of His-tagged proteins.
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Affiliation(s)
- Nishotha Anuraj
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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55
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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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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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57
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Zahran EM, Bhattacharyya D, Bachas LG. Development of reactive Pd/Fe bimetallic nanotubes for dechlorination reactions. JOURNAL OF MATERIALS CHEMISTRY 2011; 21:10454-10462. [PMID: 30505074 PMCID: PMC6262226 DOI: 10.1039/c1jm11435b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We described the synthesis and characterization of a new class of bimetallic nanotubes based on Pd/Fe and demonstrated their efficacy in the dechlorination of PCB 77, a polychlorinated biphenyl. Onedimensional iron metal nanotubes of different diameters were prepared by electroless deposition within the pores of PVP-coated polycarbonate membranes using a simple technique under ambient conditions. The longitudinal nucleation of the nanotubes along the pore walls was achieved by mounting the PC membrane between two halves of a U-shape reaction tube. The composition, morphology, and structure of the Pd/Fe nanotubes were characterized by transmission electron microscopy, scanning electron microscopy, inductively coupled plasma-atomic emission spectroscopy, and X-ray powder diffraction spectroscopy. The as-prepared Pd/Fe bimetallic nanotubes were used in dechlorination of 3,3',4,4'-tetrachlorobiphenyl (PCB 77). In comparison with Pd/Fe nanoparticles, the Pd/Fe nanotubes demonstrated higher efficiency and faster dechlorination of the PCB.
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Affiliation(s)
- Elsayed M Zahran
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Material Engineering, University of Kentucky, Lexington, KY, 40506, USA
| | - Leonidas G Bachas
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
- Department of Chemistry, University of Miami, Coral Gables, FL, 33146, USA. ; ; Tel: +1 859 257-6350
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58
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Madaeni S, Zinadini S, Vatanpour V. Convective flow adsorption of nickel ions in PVDF membrane embedded with multi-walled carbon nanotubes and PAA coating. Sep Purif Technol 2011. [DOI: 10.1016/j.seppur.2011.04.023] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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59
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Domènech B, Muñoz M, Muraviev DN, Macanás J. Polymer-stabilized palladium nanoparticles for catalytic membranes: ad hoc polymer fabrication. NANOSCALE RESEARCH LETTERS 2011; 6:406. [PMID: 21711920 PMCID: PMC3211501 DOI: 10.1186/1556-276x-6-406] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Accepted: 06/01/2011] [Indexed: 05/30/2023]
Abstract
Metal nanoparticles are known as highly effective catalysts although their immobilization on solid supports is frequently required to prevent aggregation and to facilitate the catalyst application, recovery, and reuse. This paper reports the intermatrix synthesis of Pd0 nanoparticles in sulfonated polyethersulfone with Cardo group membranes and their use as nanocomposite catalytic membrane reactors. The synthesized polymer and the corresponding nanocomposite were characterized by spectroscopic and microscopic techniques. The catalytic efficiency of catalytic membranes was evaluated by following the reduction of p-nitrophenol in the presence of NaBH4.
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Affiliation(s)
- Berta Domènech
- Analytical Chemistry Division, Chemical Department, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Maria Muñoz
- Analytical Chemistry Division, Chemical Department, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Dmitri N Muraviev
- Analytical Chemistry Division, Chemical Department, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Jorge Macanás
- Department of Chemical Engineering, UPC, C/Colom, 1, 08222 Terrassa, Barcelona, Spain
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60
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Vatanpour V, Madaeni SS, Zinadini S, Rajabi HR. Development of ion imprinted technique for designing nickel ion selective membrane. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.02.030] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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61
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Zheng YM, Zou SW, Nanayakkara KN, Matsuura T, Chen JP. Adsorptive removal of arsenic from aqueous solution by a PVDF/zirconia blend flat sheet membrane. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.02.034] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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