1
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Composites of nickel(II) polystyrene sulfonates: where solution chemistry meets nanomaterials. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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2
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Nadeem QUA, Nadeem Z, Gill R, Shchukin DG. Multifunctional ZnO-Co 3O 4 @ polymer hybrid nanocoatings with controlled adsorption, photocatalytic and anti-microbial functions for polluted water systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:46737-46750. [PMID: 35174460 DOI: 10.1007/s11356-022-18722-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
Triple action pollutant responsive multi-layer hybrid nanocoatings of architecture PEI(PAA/ZnO-Co3O4)n were constructed through ZnO-Co3O4 binary oxide co-precipitation followed by its inclusion in multi-layer polymeric thin films using Layer-by-Layer (LbL) deposition. Characterization of the designed architecture was carried out via FTIR, XRD, UV-Vis, and Raman spectroscopic studies to evaluate the chemical nature, bonding, and crystallographic behavior of ZnO-Co3O4. Peaks of ZnO-Co3O4 were recorded at 586.38, 486.08, and 443.64 cm-1 while pronounced shifting of ZnO characteristic E2 (high) peak ~ 450 cm-1 and appearance of modes around 495, 530, 630, and 719 cm-1 indexed via Raman studies validated Co3O4 impregnation into ZnO structure. XRD patterns of ZnO-Co3O4 compared to their previously reported pristine structures also justified the formation of binary oxide as unit composite. SEM micrographs confirmed homogenous multi-layered depositions while EDX analysis confirmed their uniform elemental distribution in the unit structure. Sequential multi-layer buildup up to 48 layer pairs was monitored using ellipsometry with maximum film thickness ~ 89 nm and by UV-Vis at 376 nm. The prepared thin films exhibited significant photodegradation of methylene blue ~ 91% and Cu (II) adsorption capacity ~ 89% within first 90 min of contact, along with prominent bactericidal efficiency against E. coli within 24 h of reaction time. FAAS, ICP-OES, and UV-Vis spectroscopy analyses make these multifunctional hybrid nanocoatings promising for industrial wastewater as well as drinking water purification setups. Furthermore, protuberant recycling and regenerative capacity make these hybrid nanocoatings an eco-friendly system for hydro-remediation.
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Affiliation(s)
- Qurat Ul Ain Nadeem
- Fatima Jinnah Women University, The Mall, Rawalpindi, Pakistan
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, UK
| | - Zoobia Nadeem
- Fatima Jinnah Women University, The Mall, Rawalpindi, Pakistan
| | - Rohama Gill
- Fatima Jinnah Women University, The Mall, Rawalpindi, Pakistan.
| | - Dmitry G Shchukin
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, UK.
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3
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Rawal S, Buer SH, Hawkins W, Sanders JR, Arce PE. Photocatalytic degradation of acetaminophen from water solutions via thin films part I: preparation, characteriation, and analysis of titanium dioxide thin films. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The utilization of titanium dioxide (TiO2) photocatalysis for water and air purification is a frequently used method due to TiO2 having properties making it chemically inert, highly cost-effective, abundant, non-toxic, and environmentally-friendly. In an effort to increase the efficiency of the degradation process, an in-depth understanding of the effects of the structure and number of thin film coatings is needed. Transparent, anatase-form titanium dioxide thin films were prepared via the sol-gel method and deposited onto microscopic glass slides using a novel spraying technique, with coatings ranging from 1 to 10. Characterization of the TiO2 thin film coated slides was performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The contribution shows that the coating technique is efficient in covering important areas of the surface and that it is suitable for a multiple coating layers thin film. The SEM imagines show that the surface of the slides increase coverage as the number of layers increases. This is potentially suitable for a mechanized spraying approach to upscaling the production of thin films for advanced oxidation applications.
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Affiliation(s)
- Sunil Rawal
- School of Environmental Studies , Tennessee Technological University , Cookeville , TN 38502 , USA
| | - Sabrina H. Buer
- School of Environmental Studies , Tennessee Technological University , Cookeville , TN 38502 , USA
| | - Wayne Hawkins
- Center for Manufacturing Research , Tennessee Technological University , Cookeville , TN 38502 , USA
| | - Jonathan Robby Sanders
- Department of Chemical Engineering , Tennessee Technological University , Cookeville , TN 38502 , USA
| | - Pedro E. Arce
- Department of Chemical Engineering , Tennessee Technological University , Cookeville , TN 38502 , USA
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4
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Layer-by-Layer Encapsulation of Herbicide-Degrading Bacteria for Improved Surface Properties and Compatibility in Soils. Polymers (Basel) 2021; 13:polym13213814. [PMID: 34771371 PMCID: PMC8588562 DOI: 10.3390/polym13213814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 10/28/2021] [Accepted: 11/01/2021] [Indexed: 11/29/2022] Open
Abstract
E. coli cells overexpressing the enzyme atrazine chlorohydrolase were coated using layer-by-layer self-assembly. The polymeric coating was designed to improve the surface properties of the cells and create positively charged, ecologically safe, bio-hybrid capsules that can efficiently degrade the herbicide atrazine in soils. The physio-chemical properties of the bacteria/polymer interface were studied as a function of the polymeric composition of the shell and its thickness. Characterization of cell viability, enzyme activity, morphology, and size of the bio-capsules was done using fluorescence spectroscopy, BET and zeta potential measurements and electron microscopy imaging. Out of several polyelectrolytes, the combination of polydiallyldimethylammonium chloride and polysodium 4-styrenesulfonate improved the surface properties and activity of the cells to the greatest extent. The resulting bio-hybrid capsules were stable, well-dispersed, with a net positive charge and a large surface area compared to the uncoated bacteria. These non-viable, bio-hybrid capsules also exhibited a kinetic advantage in comparison with uncoated cells. When added to soils, they exhibited continuous activity over a six-week period and atrazine concentrations declined by 84%. Thus, the concept of layer-by-layer coated bacteria is a promising avenue for the design of new and sustainable bioremediation and biocatalytic platforms.
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Kitagawa IL, Miyazaki CM, Pitol-Palin L, Okamoto R, de Vasconcellos LMR, Constantino CJL, Lisboa-Filho PN. Titanium-Based Alloy Surface Modification with TiO 2 and Poly(sodium 4-styrenesulfonate) Multilayers for Dental Implants. ACS APPLIED BIO MATERIALS 2021; 4:3055-3066. [PMID: 35014394 DOI: 10.1021/acsabm.0c01348] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Implant placement is an important repair method in dentistry and orthopedics. Increasing efforts have focused on optimizing the biocompatibility and osseointegration properties of titanium (Ti) and Ti-based alloys. In this work, Ti-based alloys were modified by the layer-by-layer (LbL) technique, which is a simple and versatile method for surface modification. The morphology and chemical structure of LbL films of poly(sodium 4-styrenesulfonate) (PSS) and Ti dioxide (TiO2) nanoparticles were first characterized employing ultraviolet-visible and Fourier-transform infrared spectroscopies as well as atomic force microscopy for further application in Ti-based alloy implants. The changes provoked by the LbL PSS/TiO2 film on the Ti-based alloy surfaces were then investigated by scanning electron microscopy and micro-Raman techniques. Finally, in vivo tests (immunolabeling and biomechanical analysis) performed with screw implants in rats suggested that PSS/TiO2 multilayers promote changes in both topography and chemical surface properties of the screw, providing beneficial effects for osteoblast activity. This simple and relatively low-cost growth process can open up possibilities to improve dental implants and, probably, bone implants in general.
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Affiliation(s)
- Igor L Kitagawa
- School of Sciences, Department of Physics, UNESP São Paulo State University, Bauru, São Paulo 17033-360, Brazil.,Science and Technology of São Paulo, IFSP Federal Institute of Education, Campus Birigui, Birigui, São Paulo 16201-407, Brazil
| | - Celina M Miyazaki
- CCTS, Federal University of São Carlos, Sorocaba, São Paulo 18052-780, Brazil
| | - Letícia Pitol-Palin
- Araçatuba Dental School, Department of Basic Science, UNESP São Paulo State University, Araçatuba 16018-805, Brazil
| | - Roberta Okamoto
- Araçatuba Dental School, Department of Basic Science, UNESP São Paulo State University, Araçatuba 16018-805, Brazil
| | - Luana M R de Vasconcellos
- Institute of Science and Technology, Department of Biosciences and Oral Diagnosis, UNESP São Paulo State University, São José dos Campos, São Paulo 12245-000, Brazil
| | - Carlos J L Constantino
- School of Technology and Applied Sciences, Department of Physics, UNESP São Paulo State University, Presidente Prudente, São Paulo 19060-900, Brazil
| | - Paulo N Lisboa-Filho
- School of Sciences, Department of Physics, UNESP São Paulo State University, Bauru, São Paulo 17033-360, Brazil
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Motay M, Martel D, Vileno B, Soraru C, Ploux L, Méndez-Medrano MG, Colbeau-Justin C, Decher G, Keller N. Virtually Transparent TiO 2/Polyelectrolyte Thin Multilayer Films as High-Efficiency Nanoporous Photocatalytic Coatings for Breaking Down Formic Acid and for Escherichia coli Removal. ACS APPLIED MATERIALS & INTERFACES 2020; 12:55766-55781. [PMID: 33284584 DOI: 10.1021/acsami.0c13545] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Virtually transparent photocatalytic multilayer films composed of TiO2 nanoparticles and polyelectrolytes were built on model surfaces using layer-by-layer assembly and investigated as photocatalytic nanoporous coatings. Formic acid (HCOOH) and Escherichia coli were used as models for the degradation of gaseous pollutants and for studying antibacterial properties. Positively charged TiO2 nanoparticles were coassembled with negatively charged poly(sodium 4-styrenesulfonate) (NaPSS) which leads to highly transparent nanoscale coatings in which the content of TiO2 particles is controlled mainly by the number of deposition cycles and the enhanced translucency with respect to titania powders is likely due to the presence of the polyelectrolytes in the interstitial space between the particles. Build-up and structural properties of the films were determined by ellipsometry, quartz crystal microbalance (QCM-D, with dissipation monitoring), and UV-vis spectrophotometry in transmission and scanning electron microscopy. Complementary photophysical and activity tests of (PSS/TiO2)n multilayer films were performed in the gas-phase under UV-A light and revealed a peculiar dependence on the number of layer pairs (LPs), corresponding to a clear deviation from the usual observations in photocatalysis with increasing TiO2 amounts. Most notably, a single LP film showed a strongly enhanced HCOOH mineralization and outperformed films with a higher number of LPs, with respect to the quantity of TiO2 catalyst present in the films. It is believed that the high quantum yield (8.1%) of a coating consisting of a single TiO2 layer which is 6-7 times higher than that of a 6-10 LP film could be due to the optimum accessibility of the TiO2 crystallites toward both HCOOH and water molecules. In thicker films, while no detrimental light screening was observed with increasing the number of LPs, diffusion phenomena could cap the efficiency of the access of the pollutant and water to the catalytic surface. Unlike for HCOOH mineralization, three PSS/TiO2 LPs were required for observing a maximum antibacterial activity of the nanocomposite coatings. This is likely due to the fact that micrometer-sized E. coli bacteria do not enter into the interstitial space between the TiO2 particles and require a different surface morphology with respect to the number of active contact points for optimum degradation.
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Affiliation(s)
- Marvin Motay
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES, CNRS, Université de Strasbourg), 25 rue Becquerel, 67087 Strasbourg, France
- Institut Charles Sadron (UPR 22), CNRS, Université de Strasbourg, 23 rue de Loess, Strasbourg CEDEX 2 67034, France
| | - David Martel
- Institut Charles Sadron (UPR 22), CNRS, Université de Strasbourg, 23 rue de Loess, Strasbourg CEDEX 2 67034, France
| | - Bertrand Vileno
- Institut de Chimie, CNRS, Université de Strasbourg, CNRS, 1 rue Blaise Pascal, Strasbourg CEDEX 67008, France
| | - Charline Soraru
- Institut de Science des Matériaux de Mulhouse (IS2M, UMR7361 CNRS/Université de Haute Alsace), 15 rue Jean Starcky, 68057 Mulhouse, France
| | - Lydie Ploux
- Institut de Science des Matériaux de Mulhouse (IS2M, UMR7361 CNRS/Université de Haute Alsace), 15 rue Jean Starcky, 68057 Mulhouse, France
- Biomaterial Bioengineering (U1121 INSERM/Université de Strasbourg), 11 rue Humann, 67000 Strasbourg, France
| | | | | | - Gero Decher
- Institut Charles Sadron (UPR 22), CNRS, Université de Strasbourg, 23 rue de Loess, Strasbourg CEDEX 2 67034, France
| | - Nicolas Keller
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES, CNRS, Université de Strasbourg), 25 rue Becquerel, 67087 Strasbourg, France
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7
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Liu M, Zhu X, Liao Q, Chen R, Ye D, Chen G. Stacked Catalytic Membrane Microreactor for Nitrobenzene Hydrogenation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ming Liu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Xun Zhu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Qiang Liao
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Rong Chen
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Dingding Ye
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Gang Chen
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
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8
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Li W, Wang Z, Xiao M, Miyoshi T, Yang X, Hu Z, Liu C, Chuang SSC, Shawkey MD, Gianneschi NC, Dhinojwala A. Mechanism of UVA Degradation of Synthetic Eumelanin. Biomacromolecules 2019; 20:4593-4601. [DOI: 10.1021/acs.biomac.9b01433] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Weiyao Li
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Zhao Wang
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Ming Xiao
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Toshikazu Miyoshi
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Xiaozhou Yang
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | | | - Cheng Liu
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Steven S. C. Chuang
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Matthew D. Shawkey
- Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, Ghent 9000, Belgium
| | - Nathan C. Gianneschi
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Ali Dhinojwala
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
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9
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Kurapati R, Groth TW, Raichur AM. Recent Developments in Layer-by-Layer Technique for Drug Delivery Applications. ACS APPLIED BIO MATERIALS 2019; 2:5512-5527. [DOI: 10.1021/acsabm.9b00703] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Rajendra Kurapati
- CÚRAM, SFI Research Centre for Medical Devices, National University of Ireland, Galway H91 W2TY, Ireland
| | | | - Ashok M. Raichur
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
- Nanotechnology and Water Sustainability Unit, University of South Africa, Florida 1710, South Africa
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10
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Saveleva MS, Eftekhari K, Abalymov A, Douglas TEL, Volodkin D, Parakhonskiy BV, Skirtach AG. Hierarchy of Hybrid Materials-The Place of Inorganics- in-Organics in it, Their Composition and Applications. Front Chem 2019; 7:179. [PMID: 31019908 PMCID: PMC6459030 DOI: 10.3389/fchem.2019.00179] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 03/07/2019] [Indexed: 12/21/2022] Open
Abstract
Hybrid materials, or hybrids incorporating both organic and inorganic constituents, are emerging as a very potent and promising class of materials due to the diverse, but complementary nature of the properties inherent of these different classes of materials. The complementarity leads to a perfect synergy of properties of desired material and eventually an end-product. The diversity of resultant properties and materials used in the construction of hybrids, leads to a very broad range of application areas generated by engaging very different research communities. We provide here a general classification of hybrid materials, wherein organics-in-inorganics (inorganic materials modified by organic moieties) are distinguished from inorganics-in-organics (organic materials or matrices modified by inorganic constituents). In the former area, the surface functionalization of colloids is distinguished as a stand-alone sub-area. The latter area-functionalization of organic materials by inorganic additives-is the focus of the current review. Inorganic constituents, often in the form of small particles or structures, are made of minerals, clays, semiconductors, metals, carbons, and ceramics. They are shown to be incorporated into organic matrices, which can be distinguished as two classes: chemical and biological. Chemical organic matrices include coatings, vehicles and capsules assembled into: hydrogels, layer-by-layer assembly, polymer brushes, block co-polymers and other assemblies. Biological organic matrices encompass bio-molecules (lipids, polysaccharides, proteins and enzymes, and nucleic acids) as well as higher level organisms: cells, bacteria, and microorganisms. In addition to providing details of the above classification and analysis of the composition of hybrids, we also highlight some antagonistic yin-&-yang properties of organic and inorganic materials, review applications and provide an outlook to emerging trends.
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Affiliation(s)
- Mariia S. Saveleva
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Remote Controlled Theranostic Systems Lab, Educational Research Institute of Nanostructures and Biosystems, Saratov State University, Saratov, Russia
| | - Karaneh Eftekhari
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Anatolii Abalymov
- Remote Controlled Theranostic Systems Lab, Educational Research Institute of Nanostructures and Biosystems, Saratov State University, Saratov, Russia
| | - Timothy E. L. Douglas
- Engineering Department and Materials Science Institute (MSI), Lancaster University, Lancaster, United Kingdom
| | - Dmitry Volodkin
- School of Science & Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Bogdan V. Parakhonskiy
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Andre G. Skirtach
- Nano-BioTechnology Group, Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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Zhang D, Zhang X, Sun Q, Zheng S, Hao J, Wang Y. Continuous Photocatalysis Based on Layer‐by‐Layer Assembly of Separation‐Free TiO
2
/Reduced Graphene Oxide Film Catalysts with Increased Charge Transfer and Active Site. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Di Zhang
- Materials Physics and Chemistry Department Harbin Institute of Technology Nangang Distr. 2 Yikuang str. HIT 150080 Science Park Harbin P.R. China
| | - Xu Zhang
- Materials Physics and Chemistry Department Harbin Institute of Technology Nangang Distr. 2 Yikuang str. HIT 150080 Science Park Harbin P.R. China
| | - Quan Sun
- Materials Physics and Chemistry Department Harbin Institute of Technology Nangang Distr. 2 Yikuang str. HIT 150080 Science Park Harbin P.R. China
| | - Shengliang Zheng
- Materials Physics and Chemistry Department Harbin Institute of Technology Nangang Distr. 2 Yikuang str. HIT 150080 Science Park Harbin P.R. China
| | - Juanyuan Hao
- Materials Physics and Chemistry Department Harbin Institute of Technology Nangang Distr. 2 Yikuang str. HIT 150080 Science Park Harbin P.R. China
- State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology 150090 Harbin P.R. China
| | - You Wang
- Materials Physics and Chemistry Department Harbin Institute of Technology Nangang Distr. 2 Yikuang str. HIT 150080 Science Park Harbin P.R. China
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12
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Prathna TC, Raichur AM. Fluoride Removal from Aqueous Solutions Using Poly(Styrene Sulfonate)/Nanoalumina Multilayer Thin Films. GLOBAL CHALLENGES (HOBOKEN, NJ) 2018; 2:1700064. [PMID: 31565320 PMCID: PMC6607118 DOI: 10.1002/gch2.201700064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 11/24/2017] [Indexed: 06/10/2023]
Abstract
In the present study, fluoride removal from drinking water is investigated using layer-by-layer (LbL) fabricated poly(sodium 4-styrene-sulfonate) (PSS)/Al2O3 thin films. The surface morphology of the fabricated thin films is characterized using atomic force microscopy and field emission-scanning electron microscopy. Optical profilometry is used to determine the self-assembly of the multilayer thin films. The effect of various parameters such as adsorbent dosage, contact time, initial fluoride content, number of bilayers, surface area, and pH is thoroughly studied. Fluoride removal increases with the number of bilayers and number of slides (total surface area). The amount of fluoride adsorbed increases from 11.32 to 26 mg L-1 when the number of substrates increases from 1 to 5. A 68% removal of fluoride is observed when 20 bilayers of PSS/Al2O3 thin films with three slides at an initial fluoride concentration of 5 mg L-1 are used, thereby bringing down the fluoride concentration level below the World Health Organization permissible limit. Slide reusability studies reveal that the fabricated thin films can be used for ten cycles without affecting the fluoride removal properties of the film. This study demonstrates the potential application of immobilized PSS/Al2O3 thin films as an effective adsorbent for drinking water purification.
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Affiliation(s)
| | - Ashok M. Raichur
- Department of Materials EngineeringIndian Institute of ScienceBangalore560012India
- Nanotechnology and Water Sustainability Research UnitUniversity of South AfricaThe Science CampusFlorida Park1710Roodepoort JohannesburgSouth Africa
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13
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Yang H, Yang J. Photocatalytic degradation of rhodamine B catalyzed by TiO2films on a capillary column. RSC Adv 2018; 8:11921-11929. [PMID: 35539428 PMCID: PMC9079268 DOI: 10.1039/c8ra00471d] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 03/13/2018] [Indexed: 01/30/2023] Open
Abstract
TiO2 films on a capillary column were prepared using tetrabutoxytitanium as a source of TiO2via the sol–gel method. The film thickness showed a linear increase with tetrabutoxytitanium concentration. The specific surface area of the film was improved by adding polyethylene glycol with different molecular weights. Under optimal conditions, the prepared film had a good mesoporous structure with specific surface area of 47.72 m2 g−1, and showed nearly spherical nanoparticles with a 10 nm diameter and anatase phase. Influences of the thickness, specific surface area, and initial solution concentration on photodegradation of rhodamine B using TiO2 films as a catalyst were investigated. The results showed that the photodegradation efficiency increased with an increasing thickness and specific surface area of TiO2 films. For a rhodamine B solution of 15 mg L−1, the photodegradation efficiency was 98.33% in 30 min under the optimal conditions. The catalysts could be reused up to eight times with almost the same efficiency, indicating a firm immobilization of films on the inner wall of the capillary. Therefore, TiO2 films are promising for the treatment of wastewater. TiO2 films on a capillary column were prepared using tetrabutoxytitanium as a source of TiO2via the sol–gel method.![]()
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Affiliation(s)
- Huaitao Yang
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Junjiao Yang
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis
- Beijing University of Chemical Technology
- Beijing 100029
- China
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14
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Casdorff K, Keplinger T, Bellanger H, Michen B, Schön S, Burgert I. High-Resolution Adhesion Mapping of the Odd-Even Effect on a Layer-by-Layer Coated Biomaterial by Atomic-Force-Microscopy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:13793-13800. [PMID: 28345851 DOI: 10.1021/acsami.7b02564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The adhesion behavior of polyelectrolyte multilayers consisting of poly(diallyldimethylammonium chloride), PDDA, and poly(styrenesulfonate), PSS, toward a silicon AFM tip was studied during their build-up on wood, a chemically heterogeneous, micrometer rough biomaterial and compared with a nanometer rough substrate, namely quartz. The atomic force microscopy-based force mapping approach generated high-resolution topography-, and adhesion maps within the first bilayers, which point toward a homogeneous layer-by-layer build-up on the biomaterial surface, and therefore indicate an even charge distribution. By analyzing the force-distance curves in every pixel of the mapping, new insights into the specific interactions of the polyelectrolyte multilayers at the surface were achieved. The characteristic odd-even effect of polyelectrolyte multilayers cannot only be determined on quartz, but also on the biomaterial wood, however, only after an offset of two bilayers. This is potentially due to the specific roughness and charge of wood in comparison to commonly used quartz.
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Affiliation(s)
- Kirstin Casdorff
- Wood Materials Science, Institute for Building Materials, ETH Zürich , Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland
- Applied Wood Materials, EMPA Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Tobias Keplinger
- Wood Materials Science, Institute for Building Materials, ETH Zürich , Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland
- Applied Wood Materials, EMPA Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Hervé Bellanger
- Wood Materials Science, Institute for Building Materials, ETH Zürich , Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland
- Applied Wood Materials, EMPA Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Benjamin Michen
- Wood Materials Science, Institute for Building Materials, ETH Zürich , Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland
- Applied Wood Materials, EMPA Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Silke Schön
- FIRST Laboratory, ETH Zürich , 8093 Zürich, Switzerland
| | - Ingo Burgert
- Wood Materials Science, Institute for Building Materials, ETH Zürich , Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland
- Applied Wood Materials, EMPA Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
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15
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Debnath B, Roy AS, Kapri S, Bhattacharyya S. Efficient Dye Degradation Catalyzed by Manganese Oxide Nanoparticles and the Role of Cation Valence. ChemistrySelect 2016. [DOI: 10.1002/slct.201600806] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Bharati Debnath
- Department of Chemical Sciences and Centre for Advanced Functional Materials; Indian Institute of Science Education and Research (IISER) Kolkata; Mohanpur - 741246 India
| | - Anupam Singha Roy
- Department of Chemical Sciences and Centre for Advanced Functional Materials; Indian Institute of Science Education and Research (IISER) Kolkata; Mohanpur - 741246 India
| | - Sutanu Kapri
- Department of Chemical Sciences and Centre for Advanced Functional Materials; Indian Institute of Science Education and Research (IISER) Kolkata; Mohanpur - 741246 India
| | - Sayan Bhattacharyya
- Department of Chemical Sciences and Centre for Advanced Functional Materials; Indian Institute of Science Education and Research (IISER) Kolkata; Mohanpur - 741246 India
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16
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Starr BJ, Tarabara VV, Herrera-Robledo M, Zhou M, Roualdès S, Ayral A. Coating porous membranes with a photocatalyst: Comparison of LbL self-assembly and plasma-enhanced CVD techniques. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.04.050] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Viau L, Vrlinic T, Jurin FE, Lakard B. Elaboration of thin colloidal silica films with controlled thickness and wettability. CR CHIM 2016. [DOI: 10.1016/j.crci.2016.01.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Gao H, Wen D, Tarakina NV, Liang J, Bushby AJ, Sukhorukov GB. Bifunctional ultraviolet/ultrasound responsive composite TiO2/polyelectrolyte microcapsules. NANOSCALE 2016; 8:5170-80. [PMID: 26878702 DOI: 10.1039/c5nr06666b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Designing and fabricating multifunctional microcapsules are of considerable interest in both academic and industrial research aspects. This work reports an innovative approach to fabricate composite capsules with high UV and ultrasound responsive functionalities that can be used as external triggers for controlled release, yet with enhanced mechanical strength that can make them survive in a harsh environment. Needle-like TiO2 nanoparticles (NPs) were produced in situ into layer-by-layer (LbL) polyelectrolyte (PE) shells through the hydrolysis of titanium butoxide (TIBO). These rigid TiO2 NPs yielded the formed capsules with excellent mechanical strength, showing a free standing structure. A possible mechanism is proposed for the special morphology formation of the TiO2 NPs and their reinforcing effects. Synergistically, their response to UV and ultrasound was visualized via SEM, with the results showing an irreversible shell rapture upon exposure to either UV or ultrasound irradiation. As expected, the release studies revealed that the dextran release from the TiO2/PE capsules was both UV-dependent and ultrasound-dependent. Besides, the biocompatibility of the capsules with the incorporation of amorphous TiO2 NPs was confirmed by an MTT assay experiment. All these pieces of evidence suggested a considerable potential medicinal application of TiO2/PE capsules for controlled drug delivery.
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Affiliation(s)
- Hui Gao
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Dongsheng Wen
- Institute of Particle Science and Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Nadezda V Tarakina
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Jierong Liang
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Andy J Bushby
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
| | - Gleb B Sukhorukov
- The School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London, E1 4NS, UK.
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19
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Deka P, Deka RC, Bharali P. Porous CuO nanostructure as a reusable catalyst for oxidative degradation of organic water pollutants. NEW J CHEM 2016. [DOI: 10.1039/c5nj02515j] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous CuO nanostructure exhibits high catalytic activity for the degradation of methylene blue and methyl orange in the presence of H2O2.
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Affiliation(s)
- Pangkita Deka
- Department of Chemical Sciences
- Tezpur University
- Napaam – 784 028
- India
| | - Ramesh C. Deka
- Department of Chemical Sciences
- Tezpur University
- Napaam – 784 028
- India
| | - Pankaj Bharali
- Department of Chemical Sciences
- Tezpur University
- Napaam – 784 028
- India
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20
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Kurapati R, Vaidyanathan M, Raichur AM. Synergistic photothermal antimicrobial therapy using graphene oxide/polymer composite layer-by-layer thin films. RSC Adv 2016. [DOI: 10.1039/c5ra23038a] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Simple and highly-efficient synergistic antimicrobial coatings based on graphene oxide, which could be coated on any substrate irrespective of shape.
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Affiliation(s)
- Rajendra Kurapati
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore
- India 560012
| | | | - Ashok M. Raichur
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore
- India 560012
- Nanotechnology and Water Sustainability Research Unit
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21
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Rongé J, Bets J, Pattanaik S, Bosserez T, Borellini S, Pulinthanathu Sree S, Decher G, Martens JA. Tailoring preparation, structure and photocatalytic activity of layer-by-layer films for degradation of different target molecules. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.07.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Carré G, Garnier L, Moeller-Siegert J, Gies JP, Keller V, André P, Keller N. Antibacterial textiles functionalized by layer-by-layer assembly of polyelectrolytes and TiO2photocatalyst. RSC Adv 2015. [DOI: 10.1039/c5ra05541e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Antibacterial photocatalytic textiles with high self-decontaminating activity under solar light againstE. colihave been prepared by sprayed layer-by-layer assembly of TiO2and polyethylenimine or polyanionic poly(styrene sulfonate) polyelectrolyte.
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Affiliation(s)
- Gaëlle Carré
- Institut de Chimie et Procédés pour l'Energie
- l'Environnement et la Santé (ICPEES)
- CNRS and Strasbourg University
- 67087 Strasbourg Cedex
- France
| | - Laurent Garnier
- Laboratoire de Biophotonique et Pharmacologie
- CNRS and Strasbourg University
- 67400 Illkirch
- France
| | - Janina Moeller-Siegert
- Institut de Chimie et Procédés pour l'Energie
- l'Environnement et la Santé (ICPEES)
- CNRS and Strasbourg University
- 67087 Strasbourg Cedex
- France
| | - Jean-Pierre Gies
- Laboratoire de Biophotonique et Pharmacologie
- CNRS and Strasbourg University
- 67400 Illkirch
- France
| | - Valérie Keller
- Institut de Chimie et Procédés pour l'Energie
- l'Environnement et la Santé (ICPEES)
- CNRS and Strasbourg University
- 67087 Strasbourg Cedex
- France
| | - Philippe André
- Laboratoire de Biophotonique et Pharmacologie
- CNRS and Strasbourg University
- 67400 Illkirch
- France
| | - Nicolas Keller
- Institut de Chimie et Procédés pour l'Energie
- l'Environnement et la Santé (ICPEES)
- CNRS and Strasbourg University
- 67087 Strasbourg Cedex
- France
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23
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Li Y, Qin Z, Guo H, Yang H, Zhang G, Ji S, Zeng T. Low-temperature synthesis of anatase TiO2 nanoparticles with tunable surface charges for enhancing photocatalytic activity. PLoS One 2014; 9:e114638. [PMID: 25506839 PMCID: PMC4266497 DOI: 10.1371/journal.pone.0114638] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 11/12/2014] [Indexed: 11/20/2022] Open
Abstract
In this work, the positively or negatively charged anatase TiO2 nanoparticles were synthesized via a low temperature precipitation-peptization process (LTPPP) in the presence of poly(ethyleneimine) (PEI) and poly(sodium4- styrenesulfonate) (PSS). X-ray diffraction (XRD) pattern and high-resolution transmission electron microscope (HRTEM) confirmed the anatase crystalline phase. The charges of the prepared TiO2, PEI-TiO2 and PSS-TiO2 nanoparticles were investigated by zeta potentials. The results showed that the zeta potentials of PEI-TiO2 nanoparticles can be tuned from +39.47 mV to +95.46 mV, and that of PSS-TiO2 nanoparticles can be adjusted from −56.63 mV to −119.32 mV. In comparison with TiO2, PSS-TiO2 exhibited dramatic adsorption and degradation of dye molecules, while the PEI modified TiO2 nanoparticles showed lower photocatalytic activity. The photocatalytic performances of these charged nanoparticles were elucidated by the results of UV-vis diffuse reflectance spectra (DRS) and the photoluminescence (PL) spectra, which indicated that the PSS-TiO2 nanoparticles showed a lower recombination rate of electron-hole pairs than TiO2 and PEI-TiO2.
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Affiliation(s)
- Ye Li
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
- Beijing Key Laboratory for Green Catalysis and Separation, Beijing, PR China
| | - Zhenping Qin
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
| | - Hongxia Guo
- College of Materials Science and Engineering, Beijing University of Technology, Beijing, China
- Beijing Key Laboratory for Green Catalysis and Separation, Beijing, PR China
- * E-mail:
| | - Hanxiao Yang
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
| | - Guojun Zhang
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
| | - Shulan Ji
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
- Beijing Key Laboratory for Green Catalysis and Separation, Beijing, PR China
| | - Tingying Zeng
- MIT, Elect. Res. Lab, Cambridge, Massachusetts, United States of America
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24
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Mahlambi MM, Vilakati GD, Mamba BB. Synthesis, Characterization, and Visible Light Degradation of Rhodamine B Dye by Carbon-Covered Alumina Supported Pd-TiO2/Polysulfone Membranes. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.917105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Kawada S, Saeki D, Matsuyama H. Development of ultrafiltration membrane by stacking of silver nanoparticles stabilized with oppositely charged polyelectrolytes. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.03.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Mahlambi MM, Mahlangu OT, Vilakati GD, Mamba BB. Visible Light Photodegradation of Rhodamine B Dye by Two Forms of Carbon-Covered Alumina Supported TiO2/Polysulfone Membranes. Ind Eng Chem Res 2014. [DOI: 10.1021/ie4038449] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mphilisi M. Mahlambi
- Department
of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Gauteng, South Africa
| | - Oranso T. Mahlangu
- Department
of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Gauteng, South Africa
- Faculty
of Bioscience Engineering, University of Gent, Coupure Links 653, B-9000 Ghent, East Flanders, Belgium
| | - Gcina D. Vilakati
- Department
of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Gauteng, South Africa
| | - Bhekie B. Mamba
- Department
of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Gauteng, South Africa
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27
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Horváth E, Grebikova L, Maroni P, Szabó T, Magrez A, Forró L, Szilagyi I. Dispersion Characteristics and Aggregation in Titanate Nanowire Colloids. Chempluschem 2014; 79:592-600. [DOI: 10.1002/cplu.201300426] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Indexed: 11/08/2022]
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28
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Niu P, Hao J. Efficient degradation of organic dyes by titanium dioxide–silicotungstic acid nanocomposite films: Influence of inorganic salts and surfactants. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.12.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Zhang X, Lin M, Lin X, Zhang C, Wei H, Zhang H, Yang B. Polypyrrole-enveloped Pd and Fe3O4 nanoparticle binary hollow and bowl-like superstructures as recyclable catalysts for industrial wastewater treatment. ACS APPLIED MATERIALS & INTERFACES 2014; 6:450-458. [PMID: 24266702 DOI: 10.1021/am404440d] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Metal and metal-oxide nanoparticles (NPs) are promising catalysts for dye degradation in wastewater treatment despite the challenges of NP recovery and recycling. In this study, water-dispersible NP superstructures with spherical morphology were constructed from hydrophobic Pd and Fe3O4 NPs by virtue of the oil droplets in an oil-in-water microemulsion as templates. Control of the evaporation rate of organic solvents in the oil droplets produces solid, hollow, and bowl-like superstructures. The component Fe3O4 and in particular Pd NPs can catalyze H2O2 degradation to create hydroxyl radicals and therewith degrade various dyes, and the magnetic Fe3O4 NPs also permit recycling of the superstructures with a magnet. Because the hollow and bowl-like superstructures increase the contact area of the NPs with their surroundings in comparison to solid superstructures, the catalytic activity is greatly enhanced. To improve the structural stability, the superstructures were further enveloped with a thin polypyrrole (PPy) shell, which does not weaken the catalytic activity. Because the current method is facile and feasible to create recyclable catalysts, it will promote the practicability of NP catalysts in treating industrial polluted water.
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Affiliation(s)
- Xue Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China
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30
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Wang SM, Liu L, Chen WL, Su ZM, Wang EB, Li C. Polyoxometalate/TiO2 Interfacial Layer with the Function of Accelerating Electron Transfer and Retarding Recombination for Dye-Sensitized Solar Cells. Ind Eng Chem Res 2013. [DOI: 10.1021/ie402074c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Shi-Ming Wang
- Department
of Chemistry, Key Laboratory of Polyoxometalates Science of Ministry
of Education, Northeast Normal University, Changchun 130024, China
| | - Lin Liu
- Department
of Chemistry, Key Laboratory of Polyoxometalates Science of Ministry
of Education, Northeast Normal University, Changchun 130024, China
| | - Wei-Lin Chen
- Department
of Chemistry, Key Laboratory of Polyoxometalates Science of Ministry
of Education, Northeast Normal University, Changchun 130024, China
| | | | - En-Bo Wang
- Department
of Chemistry, Key Laboratory of Polyoxometalates Science of Ministry
of Education, Northeast Normal University, Changchun 130024, China
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31
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Niu P, Hao J. Photocatalytic degradation of methyl orange by titanium dioxide-decatungstate nanocomposite films supported on glass slides. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.04.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Zhang X, Zhang G, Zhang B, Su Z. Synthesis of hollow Ag-Au bimetallic nanoparticles in polyelectrolyte multilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6722-6727. [PMID: 23642124 DOI: 10.1021/la400728k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Ag nanoparticles of ~20 nm size and rather uniform size distribution were synthesized in polyelectrolyte multilayers (PEMs) via an ion-exchange/reduction process in two stages (seeding and growth), which were used as sacrificial templates to fabricate Ag-Au bimetallic hollow nanoparticles via galvanic replacement reaction. The reaction process was monitored by UV-vis spectroscopy. The morphology and structure of the nanoparticles were characterized by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy, which confirmed the formation of hollow Ag-Au bimetallic nanoparticles. UV-vis absorbance spectroscopy and TEM results indicated that both size and optical properties of the Ag nanoparticles in the PEM can be controlled by manipulating ion content in the PEM and the number of the ion-exchange/reduction cycle, whereas that of Ag-Au bimetallic nanoparticles were dependent on size of the Ag templates and the replacement reaction kinetics. The hollow Ag-Au bimetallic nanoparticles exhibited a significant red shift in the surface plasmon resonance to the near-infrared region. The strategy enables facile preparation of hollow bimetallic nanoparticles in situ in polymer matrixes.
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Affiliation(s)
- Xin Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
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33
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Porus M, Maroni P, Borkovec M. Response of adsorbed polyelectrolyte monolayers to changes in solution composition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:17506-17516. [PMID: 23171242 DOI: 10.1021/la303937g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Reflectometry and quartz crystal microbalance are used to study the response of adsorbed polyelectrolyte monolayers to solutions of variable composition. These techniques respectively yield the dry and wet masses of the adsorbed layer, and by combing these results, one obtains the water content and the thickness of the polyelectrolyte films. The systems investigated are films of adsorbed poly(allyl amine) (PAH) and poly-L-lysine (PLL) on silica and films of poly(styrene sulfonate) (PSS) on amino-functionalized silica. When such films are adsorbed from concentrated polyelectrolyte solutions containing high levels of salt, they are found to swell reversibly up to a factor of 2 when incubated in solutions of low salt. This swelling is attributed to the strengthening of repulsive electrostatic interactions between the adsorbed polyelectrolyte chains. PAH films may also swell upon decrease of pH, and collapse upon a pH increase. This transition shows a marked hysteresis and can be rationalized by the competition of electrostatic repulsions between the chains and their attraction to the surface. The presently observed swelling phenomena are caused by a collective process driven by the electrostatic repulsion between the densely adsorbed polyelectrolyte chains. Such responsive layers are only obtained by adsorption from high polyelectrolyte and salt concentrations. Layers absorbed at low polyelectrolyte and salt concentrations show only minor swelling effects, since the adsorbed polyelectrolytes layers are dilute and the adsorbed polyelectrolyte chains interact only weakly.
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Affiliation(s)
- Maria Porus
- Department of Inorganic and Analytical Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, 1205 Geneva, Switzerland
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34
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Efficient degradation of methyl orange via multilayer films of titanium dioxide and silicotungstic acid. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4670-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Chapel JP, Berret JF. Versatile electrostatic assembly of nanoparticles and polyelectrolytes: Coating, clustering and layer-by-layer processes. Curr Opin Colloid Interface Sci 2012. [DOI: 10.1016/j.cocis.2011.08.009] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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36
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Zhu Y, Piscitelli F, Buonocore GG, Lavorgna M, Amendola E, Ambrosio L. Effect of surface fluorination of TiO2 particles on photocatalitytic activity of a hybrid multilayer coating obtained by sol-gel method. ACS APPLIED MATERIALS & INTERFACES 2012; 4:150-157. [PMID: 22117597 DOI: 10.1021/am201192e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A multilayer photoactive coating containing surface fluorinated TiO(2) nanoparticles and hybrid matrices by sol gel approach based on renewable chitosan was applied on poly(lactic acid) (PLA) film by a step wise spin-coating method. The upper photoactive layer contains nano-sized functionalized TiO(2) particles dispersed in a siloxane based matrix. For the purpose of improving TiO(2) dispersion at the air interface coating surface, TiO(2) nanoparticles were modified by silane coupling agent 1H,1H,2H,2H-perfluorooctyltriethoxysilane (FTS) with fluoro-organic side chains. An additional hybrid material consisting of chitosan (CS) cross-linked with 3-glycidyloxypropyl trimethoxy silane (GOTMS) was applied as interlayer between the PLA substrate and the upper photoactive coating to increase the adhesion and reciprocal affinity. The multilayer TiO(2)/CS-GOTMS coatings on PLA films showed a thickness of ~4-6 μm and resulted highly transparent. Their structure was exhaustively characterized by SEM, optical microscope, UV-vis spectroscopy and contact angle measurements. The photocatalytic activity of the multilayer coatings were investigated using methyl orange (MeO) as a target pollutant; the results showed that PLA films coated with surface fluorinated particles exhibit higher activity than films with neat particles, because of a better dispersion of TiO(2) particles. The mechanical properties of PLA and films coated with fluorinated particles, irradiated by UV light were also investigated; the results showed that the degradation of PLA substrate was markedly suppressed because of the UV adsorptive action of the multilayer coating.
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Affiliation(s)
- Yunfeng Zhu
- School of Textile and Materials Engineering, Dalian Polytechnic University, 116034 Dalian, China
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37
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Niu P, Hao J. Fabrication of titanium dioxide and tungstophosphate nanocomposite films and their photocatalytic degradation for methyl orange. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:13590-7. [PMID: 21973200 DOI: 10.1021/la203178s] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Photocatalytic multilayer films with different numbers of bilayers were prepared via an electrostatic layer-by-layer (LbL) self-assembly method. These LbL films were characterized by UV-vis spectroscopy, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Our results indicate that TiO(2) and tungstophosphate (H(3)PW(12)O(40), abbreviated as PW(12)) are successfully incorporated into the thin films. The as-prepared (TiO(2)/PW(12))(n) films show good photocatalytic performance toward methyl orange (MO) solution at pH 2.0, which is attributed to the synergistic effect between TiO(2) and PW(12). The effect of experimental parameters including number of bilayers, initial concentration, and pH value of dye solution were also studied. The multilayer films can be easily recovered and reused several times with little change of degradation, indicating that they are stable under the ultraviolet (UV) irradiation. The detection of active species displays that active holes (h(+)) play a dominant role for MO photodegradation in the TiO(2)/PW(12) system. Taking advantage of immobilization of catalysts on glass slides, the problem of recovery is solved. It is expected that photocatalytic multilayer films have substantial applications in industry.
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Affiliation(s)
- Ping Niu
- Key Laboratory for Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, PR China
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Priya DN, Modak JM, Trebše P, Zabar R, Raichur AM. Photocatalytic degradation of dimethoate using LbL fabricated TiO2/polymer hybrid films. JOURNAL OF HAZARDOUS MATERIALS 2011; 195:214-222. [PMID: 21880417 DOI: 10.1016/j.jhazmat.2011.08.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 08/06/2011] [Accepted: 08/09/2011] [Indexed: 05/31/2023]
Abstract
Degradation of dimethoate under UV irradiation using TiO(2)/polymer films prepared by the layer-by-layer (LbL) method was investigated. The thin films were fabricated on glass slides and the surface morphology and roughness of the thin films were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The effect of lamp intensity, catalyst loading in the layers, number of bilayers, pH and initial dimethoate concentration on the degradation of dimethoate was systematically studied. The degradation was monitored using high performance liquid chromatography (HPLC) analysis and total organic carbon (TOC) measurements as a function of irradiation time, to see the change in concentration of dimethoate and mineralization, respectively. Complete degradation of dimethoate was achieved under TiO(2) optimum loading of 4 g/L at an UV irradiation time of 180 min. Increase in the lamp intensity, catalyst loading and number of bilayers increased the rate of degradation. At a pH of 4.62, complete degradation of dimethoate was observed. The degradation efficiency decreased with increase in initial dimethoate concentration. The degradation byproducts were analyzed and confirmed by gas chromatography-mass spectra (GC-MS). Toxicity of the irradiated samples was measured using the luminescence of bacteria Vibrio fischeri after 30 min of incubation and the results showed more toxicity than the parent compound. Catalyst reusability studies revealed that the fabricated thin films could be repeatedly used for up to ten times without affecting the photocatalytic activity of the films. The findings of the present study are very useful for the treatment of wastewaters contaminated with pesticides.
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Affiliation(s)
- D Neela Priya
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
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Dontsova D, Keller V, Keller N, Steffanut P, Félix O, Decher G. Photocatalytically Active Polyelectrolyte/Nanoparticle Films for the Elimination of a Model Odorous Gas. Macromol Rapid Commun 2011; 32:1145-9. [DOI: 10.1002/marc.201100192] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 05/04/2011] [Indexed: 11/12/2022]
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Zhang YC, Du ZN, Li KW, Zhang M, Dionysiou DD. High-performance visible-light-driven SnS₂/SnO₂ nanocomposite photocatalyst prepared via in situ hydrothermal oxidation of SnS₂ nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2011; 3:1528-1537. [PMID: 21476553 DOI: 10.1021/am200102y] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
SnS₂/SnO₂ nanocomposites with tunable SnO₂ contents were prepared via in situ hydrothermal oxidation of SnS₂ nanoparticles in 0.375-4.5 mass% H₂O₂ aqueous solutions at 180 °C for 0-12 h. The structure, composition and optical properties of the as-prepared SnS₂/SnO₂ nanocomposites were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, Brunauer-Emmett-Teller (BET) surface area analysis, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectra. Furthermore, their photocatalytic properties were tested for the degradation of methyl orange in water under visible light (λ > 420 nm) irradiation. It was found that the as-prepared SnS₂/SnO₂ nanocomposites with suitable SnO₂ content not only demonstrated superior photocatalytic activity to both SnS₂ nanoparticles and physically mixed SnS₂/SnO₂ composite nanoparticles, but also had remarkable photocatalytic stability. The tight attachment of SnO₂ nanoparticles to SnS₂ nanoparticles, which can facilitate interfacial electron transfer and reduce the self-agglomeration of two components, was considered to play an important role in achieving the high photocatalytic performances exhibited by the as-prepared SnS₂/SnO₂ nanocomposites.
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Affiliation(s)
- Yong Cai Zhang
- Key Laboratory of Environmental Material and Environmental Engineering of Jiangsu Province, College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
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Mahanta D, Manna U, Madras G, Patil S. Multilayer self-assembly of TiO₂ nanoparticles and polyaniline-grafted-chitosan copolymer (CPANI) for photocatalysis. ACS APPLIED MATERIALS & INTERFACES 2011; 3:84-92. [PMID: 21141944 DOI: 10.1021/am1009265] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A photocatalytic thin film of TiO₂ nanoparticles and polyaniline-grafted-chitosan (CPANI) was fabricated by layer-by-layer (LbL) approach. The growth of the self-assembly of polymer nanocomposite was monitored by UV-vis spectroscopy and the thin film morphology was analyzed from scanning electron microscopy (SEM). Poly(styrene sulfonate) (PSS) was used as a bridging layer between TiO₂ nanoparticles and CPANI. Incorporation of CPANI within the LbL self-assembly of polymer nanocomposites enhanced the dye degradation ability of the thin film. These results indicate that the presence of CPANI improves the adsorption of dye in the self-assembly. The effect of surface area and the amount of catalyst was also examined. The reusability of the thin films for dye degradation study ensures the stability of the self-assembly.
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Affiliation(s)
- Debajyoti Mahanta
- Solid State and Structural Chemistry Unit, Institute of Science, Bangalore, India, 560012
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Multilayered polyplexes with the endosomal buffering polycation in the core and the cell uptake-favorable polycation in the outer layer for enhanced gene delivery. Biomaterials 2010; 31:9366-72. [DOI: 10.1016/j.biomaterials.2010.08.066] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Accepted: 08/18/2010] [Indexed: 01/26/2023]
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Yoon JA, Young T, Matyjaszewski K, Kowalewski T. Thermocurable hyperbranched polystyrenes for ultrathin polymer dielectrics. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2475-2480. [PMID: 20707329 DOI: 10.1021/am100463z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Thermocurable hyperbranched polystyrenes were successfully synthesized using atom transfer radical polymerization and exhibited superior ultrathin film formation capabilities in comparison with the linear analogues, as assessed by the minimal film thickness attainable by spin-coating without dewetting. They were suitable as ultrathin film organic dielectrics, with parallel plate specific capacitances as high as ∼680 nF/cm2. Similar to high performance inorganic dielectrics, capacitance measurements pointed to the presence of "dead" interfacial capacitance, which could be accounted for by considering the geometric effect of roughness "incommensurability" between metal electrode and polymer film.
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Affiliation(s)
- Jeong Ae Yoon
- Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
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Wu S, Garfield LB, Rupert NE, Grady BP, Funkhouser GP. Strength improvement via coating of a cylindrical hole by layer-by-layer assembled polymer particles. ACS APPLIED MATERIALS & INTERFACES 2010; 2:1220-1227. [PMID: 20423142 DOI: 10.1021/am1000618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Negatively charged colloidal poly(methyl methacrylate-co-butyl acrylate) (P(MMA-BA)) particles and positively charged dissolved poly(ethyleneimine) (PEI) were adsorbed onto a cement block using a layer-by-layer (LBL) assembly technique. The block was fashioned so as to have a cylindrical hole running from one face to another along the long axis of the rectangular block, and a fluid containing either of the two charged materials was pumped through the block. The result was a film tens of micrometers thick, and the pressure required to crack the cement block was measured after one end of the hole was sealed. Latex particles with a T(g) near the use temperature showed the maximum improvement in the cracking stress of the blocks. In a multilayer coating with identically sized particles, the cracking stress of the blocks increased to an improvement of 25% and then dropped off with increasing number of layers, even though the relationship between film thickness and the number of layers was linear. An improvement of about 30% in the cracking stress of the coated blocks was obtained when using multiple layers with different particle sizes. The effects of the number of layers and particle size on the cracking stress suggest that both the morphology and the thickness of the film play a role in performance. Tests done under confinement, e.g., with an external stress applied to the outside of the blocks, suggest that not only does a film-forming mechanism contribute to performance but that filling of microcracks in the rock may also play a role.
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Affiliation(s)
- Shuqing Wu
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73019, USA
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