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Dutta S, Shreyash N, Satapathy BK, Saha S. Advances in design of polymer brush functionalized inorganic nanomaterials and their applications in biomedical arena. WIRES NANOMEDICINE AND NANOBIOTECHNOLOGY 2022; 15:e1861. [PMID: 36284373 DOI: 10.1002/wnan.1861] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/23/2022] [Accepted: 09/12/2022] [Indexed: 02/01/2023]
Abstract
Grafting of polymer brush (assembly of polymer chains tethered to the substrate by one end) is emerging as one of the most viable approach to alter the surface of inorganic nanomaterials. Inorganic nanomaterials despite their intrinsic functional superiority, their applications remain restricted due to their incompatibility with organic or biological moieties vis-à-vis agglomeration issues. To overcome such a shortcoming, polymer brush modified surfaces of inorganic nanomaterials have lately proved to be of immense potential. For example, polymer brush-modified inorganic nanomaterials can act as efficient substrates/platforms in biomedical applications, ranging from drug-delivery to protein-array due to their integrated advantages such as amphiphilicity, stimuli responsiveness, enhanced biocompatibility, and so on. In this review, the current state of the art related to polymer brush-modified inorganic nanomaterials focusing, not only, on their synthetic strategies and applications in biomedical field but also the architectural influence of polymer brushes on the responsiveness properties of modified nanomaterials have comprehensively been discussed and its associated future perspective is also presented. This article is categorized under: Diagnostic Tools > In Vivo Nanodiagnostics and Imaging Therapeutic Approaches and Drug Discovery > Emerging Technologies Nanotechnology Approaches to Biology > Nanoscale Systems in Biology.
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Affiliation(s)
- Soumyadip Dutta
- Department of Materials Science and Engineering Indian Institute of Technology Delhi Delhi India
| | - Nehil Shreyash
- Rajiv Gandhi Institute of Petroleum Technology Jais Uttar Pradesh India
| | - Bhabani Kumar Satapathy
- Department of Materials Science and Engineering Indian Institute of Technology Delhi Delhi India
| | - Sampa Saha
- Department of Materials Science and Engineering Indian Institute of Technology Delhi Delhi India
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Flemming P, Münch AS, Fery A, Uhlmann P. Constrained thermoresponsive polymers - new insights into fundamentals and applications. Beilstein J Org Chem 2021; 17:2123-2163. [PMID: 34476018 PMCID: PMC8381851 DOI: 10.3762/bjoc.17.138] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/10/2021] [Indexed: 12/15/2022] Open
Abstract
In the last decades, numerous stimuli-responsive polymers have been developed and investigated regarding their switching properties. In particular, thermoresponsive polymers, which form a miscibility gap with the ambient solvent with a lower or upper critical demixing point depending on the temperature, have been intensively studied in solution. For the application of such polymers in novel sensors, drug delivery systems or as multifunctional coatings, they typically have to be transferred into specific arrangements, such as micelles, polymer films or grafted nanoparticles. However, it turns out that the thermodynamic concept for the phase transition of free polymer chains fails, when thermoresponsive polymers are assembled into such sterically confined architectures. Whereas many published studies focus on synthetic aspects as well as individual applications of thermoresponsive polymers, the underlying structure-property relationships governing the thermoresponse of sterically constrained assemblies, are still poorly understood. Furthermore, the clear majority of publications deals with polymers that exhibit a lower critical solution temperature (LCST) behavior, with PNIPAAM as their main representative. In contrast, for polymer arrangements with an upper critical solution temperature (UCST), there is only limited knowledge about preparation, application and precise physical understanding of the phase transition. This review article provides an overview about the current knowledge of thermoresponsive polymers with limited mobility focusing on UCST behavior and the possibilities for influencing their thermoresponsive switching characteristics. It comprises star polymers, micelles as well as polymer chains grafted to flat substrates and particulate inorganic surfaces. The elaboration of the physicochemical interplay between the architecture of the polymer assembly and the resulting thermoresponsive switching behavior will be in the foreground of this consideration.
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Affiliation(s)
- Patricia Flemming
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Alexander S Münch
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Petra Uhlmann
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- University of Nebraska-Lincoln, NE 68588, Lincoln, USA
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Zhang Y, Chapman WG. Modeling Lower Critical Solution Temperature Behavior of Associating Dendrimers Using Density Functional Theory. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10808-10817. [PMID: 31335155 DOI: 10.1021/acs.langmuir.9b00514] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We study the phase behavior of associating dendrimers in explicit solvents using classical density functional theory. The existence of association enables uptake of solvent inside the dendrimer even for unfavorable Lennard-Jones interaction between the solvent and dendrimer. Depending on the distributions of associating sites, the dendrimer conformation can be either dense-core or dense-shell. The conformation of the associating dendrimer is greatly affected by the temperature. Due to the interplay between association interaction and Lennard-Jones attractions, we find the lower critical solution temperature (LCST) behavior of dendrimer conformation and study how it changes as the dendrimer size or solvent size changes. The dendrimer in our study displays no LCST behavior at low generations, and it has a maximum LCST at G4. Moreover, increasing the solvent chain length decreases the LCST. For solvents with self-association, the competition between solvent-solvent association and solvent-dendrimer association also tends to reduce the LCST. Qualitatively consistent with experiments, our results provide insight into the molecular mechanism of the LCST behavior of associating dendrimers.
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Affiliation(s)
- Yuchong Zhang
- Department of Chemical and Biomolecular Engineering , Rice University , 6100 Main Street , Houston , Texas 77005 , United States
| | - Walter G Chapman
- Department of Chemical and Biomolecular Engineering , Rice University , 6100 Main Street , Houston , Texas 77005 , United States
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Wang L, Haghmoradi A, Liu J, Xi S, Hirasaki GJ, Miller CA, Chapman WG. Modeling micelle formation and interfacial properties with iSAFT classical density functional theory. J Chem Phys 2018; 146:124705. [PMID: 28388160 DOI: 10.1063/1.4978503] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Surfactants reduce the interfacial tension between phases, making them an important additive in a number of industrial and commercial applications from enhanced oil recovery to personal care products (e.g., shampoo and detergents). To help obtain a better understanding of the dependence of surfactantproperties on molecular structure, a classical density functional theory, also known as interfacial statistical associating fluid theory, has been applied to study the effects of surfactant architecture on micelle formation and interfacial properties for model nonionic surfactant/water/oil systems. In this approach, hydrogen bonding is explicitly included. To minimize the free energy, the system minimizes interactions between hydrophobic components and hydrophilic components with water molecules hydrating the surfactant head group. The theory predicts micellar structure, effects of surfactant architecture on critical micelle concentration, aggregation number, and interfacial tension isotherm of surfactant/water systems in qualitative agreement with experimental data. Furthermore, this model is applied to study swollen micelles and reverse swollen micelles that are necessary to understand the formation of a middle-phase microemulsion.
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Affiliation(s)
- Le Wang
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
| | - Amin Haghmoradi
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
| | - Jinlu Liu
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
| | - Shun Xi
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
| | - George J Hirasaki
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
| | - Clarence A Miller
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
| | - Walter G Chapman
- Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main St., Houston, Texas 77005, USA
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Chen X, Feng W, Han X, Liu H. Possible Way to Study Cononsolvency in Confinement: A Lattice Density Functional Theory Approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11446-11456. [PMID: 28930471 DOI: 10.1021/acs.langmuir.7b03134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Polymer lattice density functional theory (PLDFT) is used to investigate the cononsolvency (CNS) phenomena related to polymer adsorption in a slit pore. Specifically, the two simplest types of CNS are examined: CNS1 with solvent-cosolvent binding as the dominant factor and CNS2 with polymer-cosolvent binding as the dominant factor. The simplified models for CNS1/CNS2 well capture the symmetrical/asymmetrical reentrant swelling transition of polymers positively/negatively adsorbed on the solid surface as confirmed by the calculation of PLDFT. To more deeply understand the mechanism of CNS in polymer adsorption, the essential difference and connection between the two types of CNS are analyzed by PLDFT via the quantities as the surface/middle swelling ratio defined for the aggregated layer of polymers in the slit. Further investigation of the effects of binding strength on the collapsing state of the polymer membrane shows the existence of the critical binding energy to trigger drastic collapse through the cosolvent for CNS1 or CNS2. The effects from polymer concentration on two types of CNS are also discussed, showing two important results for CNS2 in agreement with reported experiments. For application, this work indicated the possibility of employing CNS (CNS1) in adsorbed polymers for a tunable surface, as an alternative to polymer brushes.
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Affiliation(s)
- Xueqian Chen
- State Key Laboratory of Chemical and Engineering and School of Science and ‡State Key Laboratory of Chemical and Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Wei Feng
- State Key Laboratory of Chemical and Engineering and School of Science and ‡State Key Laboratory of Chemical and Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Xia Han
- State Key Laboratory of Chemical and Engineering and School of Science and ‡State Key Laboratory of Chemical and Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Honglai Liu
- State Key Laboratory of Chemical and Engineering and School of Science and ‡State Key Laboratory of Chemical and Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology , Shanghai 200237, China
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Zhan C, Lian C, Zhang Y, Thompson MW, Xie Y, Wu J, Kent PRC, Cummings PT, Jiang D, Wesolowski DJ. Computational Insights into Materials and Interfaces for Capacitive Energy Storage. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1700059. [PMID: 28725531 PMCID: PMC5515120 DOI: 10.1002/advs.201700059] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 03/25/2017] [Indexed: 05/02/2023]
Abstract
Supercapacitors such as electric double-layer capacitors (EDLCs) and pseudocapacitors are becoming increasingly important in the field of electrical energy storage. Theoretical study of energy storage in EDLCs focuses on solving for the electric double-layer structure in different electrode geometries and electrolyte components, which can be achieved by molecular simulations such as classical molecular dynamics (MD), classical density functional theory (classical DFT), and Monte-Carlo (MC) methods. In recent years, combining first-principles and classical simulations to investigate the carbon-based EDLCs has shed light on the importance of quantum capacitance in graphene-like 2D systems. More recently, the development of joint density functional theory (JDFT) enables self-consistent electronic-structure calculation for an electrode being solvated by an electrolyte. In contrast with the large amount of theoretical and computational effort on EDLCs, theoretical understanding of pseudocapacitance is very limited. In this review, we first introduce popular modeling methods and then focus on several important aspects of EDLCs including nanoconfinement, quantum capacitance, dielectric screening, and novel 2D electrode design; we also briefly touch upon pseudocapactive mechanism in RuO2. We summarize and conclude with an outlook for the future of materials simulation and design for capacitive energy storage.
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Affiliation(s)
- Cheng Zhan
- Department of ChemistryUniversity of CaliforniaRiversideCA92521United States
| | - Cheng Lian
- Department of Chemical and Environmental EngineeringUniversity of CaliforniaRiversideCalifornia92521United States
- State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghai200237P. R. China
| | - Yu Zhang
- Department of Chemical and Biomolecular EngineeringVanderbilt UniversityNashvilleTennessee37235United States
| | - Matthew W. Thompson
- Department of Chemical and Biomolecular EngineeringVanderbilt UniversityNashvilleTennessee37235United States
| | - Yu Xie
- Center for Nanophase Materials SciencesOak Ridge National LaboratoryOak RidgeTennessee37831United States
| | - Jianzhong Wu
- Department of Chemical and Environmental EngineeringUniversity of CaliforniaRiversideCalifornia92521United States
| | - Paul R. C. Kent
- Center for Nanophase Materials SciencesOak Ridge National LaboratoryOak RidgeTennessee37831United States
- Computer Science and Mathematics DivisionOak Ridge National LaboratoryOak RidgeTennessee37831United States
| | - Peter T. Cummings
- Department of Chemical and Biomolecular EngineeringVanderbilt UniversityNashvilleTennessee37235United States
| | - De‐en Jiang
- Department of ChemistryUniversity of CaliforniaRiversideCA92521United States
| | - David J. Wesolowski
- Chemcial Sciences DivisionOak Ridge National LaboratoryOak RidgeTennessee37831United States
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Wang D, Li Y, Li Puma G, Lianos P, Wang C, Wang P. Photoelectrochemical cell for simultaneous electricity generation and heavy metals recovery from wastewater. JOURNAL OF HAZARDOUS MATERIALS 2017; 323:681-689. [PMID: 27817875 DOI: 10.1016/j.jhazmat.2016.10.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/15/2016] [Accepted: 10/17/2016] [Indexed: 06/06/2023]
Abstract
The feasibility of simultaneous recovery of heavy metals from wastewater (e.g., acid mining and electroplating) and production of electricity is demonstrated in a novel photoelectrochemical cell (PEC). The photoanode of the cell bears a nanoparticulate titania (TiO2) film capped with the block copolymer [poly(ethylene glycol)-b-poly(propylene glycol)-b-poly(ethylene glycol)] hole scavenger, which consumed photogenerated holes, while the photogenerated electrons transferred to a copper cathode reducing dissolved metal ions and produced electricity. Dissolved silver Ag+, copper Cu2+, hexavalent chromium as dichromate Cr2O72- and lead Pb2+ ions in a mixture (0.2mM each) were removed at different rates, according to their reduction potentials. Reduced Ag+, Cu2+ and Pb2+ ions produced metal deposits on the cathode electrode which were mechanically recovered, while Cr2O72- reduced to the less toxic Cr3+ in solution. The cell produced a current density Jsc of 0.23mA/cm2, an open circuit voltage Voc of 0.63V and a maximum power density of 0.084mW/cm2. A satisfactory performance of this PEC for the treatment of lead-acid battery wastewater was observed. The cathodic reduction of heavy metals was limited by the rate of electron-hole generation at the photoanode. The PEC performance decreased by 30% after 9 consecutive runs, caused by the photoanode progressive degradation.
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Affiliation(s)
- Dawei Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xi Kang Road #1, Nanjing 210098, PR China
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xi Kang Road #1, Nanjing 210098, PR China.
| | - Gianluca Li Puma
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom.
| | - Panagiotis Lianos
- Department of Chemical Engineering, University of Patras, 26500 Patras, Greece
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xi Kang Road #1, Nanjing 210098, PR China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xi Kang Road #1, Nanjing 210098, PR China
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Lian C, Zhao S, Liu H, Wu J. Time-dependent density functional theory for the charging kinetics of electric double layer containing room-temperature ionic liquids. J Chem Phys 2016; 145:204707. [DOI: 10.1063/1.4968037] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Cheng Lian
- State Key Laboratory of Chemical Engineering, and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, USA
| | - Shuangliang Zhao
- State Key Laboratory of Chemical Engineering, and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China
| | - Honglai Liu
- State Key Laboratory of Chemical Engineering, and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China
| | - Jianzhong Wu
- Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, USA
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Lian C, Liu H, Henderson D, Wu J. Can ionophobic nanopores enhance the energy storage capacity of electric-double-layer capacitors containing nonaqueous electrolytes? JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:414005. [PMID: 27546561 DOI: 10.1088/0953-8984/28/41/414005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ionophobicity effect of nanoporous electrodes on the capacitance and the energy storage capacity of nonaqueous-electrolyte supercapacitors is studied by means of the classical density functional theory (DFT). It has been hypothesized that ionophobic nanopores may create obstacles in charging, but they store energy much more efficiently than ionophilic pores. In this study, we find that, for both ionic liquids and organic electrolytes, an ionophobic pore exhibits a charging behavior different from that of an ionophilic pore, and that the capacitance-voltage curve changes from a bell shape to a two-hump camel shape when the pore ionophobicity increases. For electric-double-layer capacitors containing organic electrolytes, an increase in the ionophobicity of the nanopores leads to a higher capacity for energy storage. Without taking into account the effects of background screening, the DFT predicts that an ionophobic pore containing an ionic liquid does not enhance the supercapacitor performance within the practical voltage ranges. However, by using an effective dielectric constant to account for ion polarizability, the DFT predicts that, like an organic electrolyte, an ionophobic pore with an ionic liquid is also able to increase the energy stored when the electrode voltage is beyond a certain value. We find that the critical voltage for an enhanced capacitance in an ionic liquid is larger than that in an organic electrolyte. Our theoretical predictions provide further understanding of how chemical modification of porous electrodes affects the performance of supercapacitors.
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Affiliation(s)
- Cheng Lian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China. Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA
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Kesal D, Christau S, Krause P, Möller T, Von Klitzing R. Uptake of pH-Sensitive Gold Nanoparticles in Strong Polyelectrolyte Brushes. Polymers (Basel) 2016; 8:E134. [PMID: 30979224 PMCID: PMC6432499 DOI: 10.3390/polym8040134] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 03/25/2016] [Accepted: 03/31/2016] [Indexed: 01/26/2023] Open
Abstract
The impact of electrostatic attraction on the uptake of gold nanoparticles (AuNPs) into positively charged strong poly-[2-(Methacryloyloxy) ethyl] trimethylammonium chloride (PMETAC) polyelectrolyte brushes was investigated. In this work, PMETAC brushes were synthesized via surface-initiated atom transfer radical polymerization (Si-ATRP). PMETAC/AuNP composite materials were prepared by incubation of the polymer brush coated samples into 3-mercaptopropionic acid-capped AuNP (5 nm in diameter) suspension. The electrostatic interactions were tuned by changing the surface charge of the AuNPs through variations in pH value, while the charge of the PMETAC brush was not affected. Atomic-force microscopy (AFM), ellipsometry, UV/Vis spectroscopy, gravimetric analysis and transmission electron microscopy (TEM) were employed to study the loading and penetration into the polymer brush. The results show that the number density of attached AuNPs depends on the pH value and increases with increasing pH value. There is also strong evidence that the particle assembly is dependent on the pH value of the AuNP suspension. Incubation of PMETAC brushes in AuNP suspension at pH 4 led to the formation of a surface layer on top of the brush (2D assembly) due to sterical hindrance of the clustered AuNPs, while incubation in AuNP suspension at pH 8 led to deeper particle penetration into the brush (3D assembly). The straightforward control of particle uptake and assembly by tuning the charge density of the nanoparticle surface is a valuable tool for the development of materials for colorimetric sensor applications.
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Affiliation(s)
- Dikran Kesal
- Stranski-Laboratorium für Phyisikalische Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany.
| | - Stephanie Christau
- Stranski-Laboratorium für Phyisikalische Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany.
| | - Patrick Krause
- Stranski-Laboratorium für Phyisikalische Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany.
| | - Tim Möller
- Stranski-Laboratorium für Phyisikalische Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany.
| | - Regine Von Klitzing
- Stranski-Laboratorium für Phyisikalische Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany.
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Xu Y, Shi K, Zhao S, Guo X, Wang J. Block length determines the adsorption dynamics mode of triblock copolymers to a hydrophobic surface. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2015.11.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Darvishmanesh S, Qian X, Wickramasinghe SR. Responsive membranes for advanced separations. Curr Opin Chem Eng 2015. [DOI: 10.1016/j.coche.2015.04.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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14
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Wang D, Li Y, Li Puma G, Wang C, Wang P, Zhang W, Wang Q. Mechanism and experimental study on the photocatalytic performance of Ag/AgCl @ chiral TiO2 nanofibers photocatalyst: the impact of wastewater components. JOURNAL OF HAZARDOUS MATERIALS 2015; 285:277-84. [PMID: 25524623 DOI: 10.1016/j.jhazmat.2014.10.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 10/05/2014] [Accepted: 10/25/2014] [Indexed: 05/20/2023]
Abstract
The effect of the water matrix components of a secondary effluent of a urban wastewater treatment plant on the photocatalytic activity of Ag/AgCl @ chiral TiO2 nanofibers and the undergoing reaction mechanisms were investigated. These effects were evaluated through the water components-induced changes on the net rate of hydroxyl radical (˙OH) generation and modeled using a relative rate technique. Dissolved organic matter DOM (k=-2.8×10(8) M(-1) s(-1)) scavenged reactive oxygen species, Cl(-) (k=-5.3×10(8) M(-1) s(-1)) accelerated the transformation from Ag to AgCl (which is not photocatalytically active under visible-light irradiation), while Ca(2+) at concentrations higher than 50 mM (k=-1.3×10(9) M(-1) s(-1)) induced aggregation of Ag/AgCl and thus all of them revealed inhibitory effects. In contrast, NO3(-) (k=6.9×10(8) M(-1) s(-1)) and CO3(2-) (k=3.7×10(8) M(-1) s(-1)) improved the photocatalytic activity of Ag/AgCl slightly by improving the rate of HO˙ generation. Other ubiquitous secondary effluent components including SO4(2-) (k=3.9×10(5) M(-1) s(-1)), NH3(+) (k=3.5×10(5) M(-1) s(-1)) and Na(+) (k=2.6×10(4) M(-1) s(-1)) had negligible effects. 90% of 17-α-ethynylestradiol (EE2) spiked in the secondary effluent was removed within 12 min, while the structure and size of Ag/AgCl @ chiral TiO2 nanofibers remained stable. This work may be helpful not only to uncover the photocatalytic mechanism of Ag/AgCl based photocatalyst but also to elucidate the transformation and transportation of Ag and AgCl in natural water.
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Affiliation(s)
- Dawei Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University. Xi Kang Road #1, Nanjing 210098, PR China
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University. Xi Kang Road #1, Nanjing 210098, PR China.
| | - Gianluca Li Puma
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University. Xi Kang Road #1, Nanjing 210098, PR China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University. Xi Kang Road #1, Nanjing 210098, PR China
| | - Wenlong Zhang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University. Xi Kang Road #1, Nanjing 210098, PR China
| | - Qing Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University. Xi Kang Road #1, Nanjing 210098, PR China
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Zhao S, Liu Y, Chen X, Lu Y, Liu H, Hu Y. Unified Framework of Multiscale Density Functional Theories and Its Recent Applications. MESOSCALE MODELING IN CHEMICAL ENGINEERING PART II 2015. [DOI: 10.1016/bs.ache.2015.10.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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16
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Lian C, Zhi D, Xu S, Liu H. A Molecular Thermodynamic Model for Restricted Swelling Behaviors of Thermo-sensitive Hydrogel. Chin J Chem Eng 2014. [DOI: 10.1016/j.cjche.2014.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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A lattice molecular thermodynamic model for thermo-sensitive random copolymer hydrogels. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3411-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lian C, Chen X, Zhao S, Lv W, Han X, Wang H, Liu H. Substrate Effect on the Phase Behavior of Polymer Brushes with Lattice Density Functional Theory. MACROMOL THEOR SIMUL 2014. [DOI: 10.1002/mats.201400033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Cheng Lian
- State Key Laboratory of Chemical Engineering and Department of Chemistry; East China University of Science and Technology; Xuhui Shanghai 200237 China
| | - Xueqian Chen
- Department of Physics; East China University of Science and Technology; Xuhui Shanghai 200237 China
| | - Shuangliang Zhao
- State Key Laboratory of Chemical Engineering and Department of Chemistry; East China University of Science and Technology; Xuhui Shanghai 200237 China
| | - Wenjie Lv
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process; East China University of Science and Technology; Xuhui Shanghai 200237 China
| | - Xia Han
- State Key Laboratory of Chemical Engineering and Department of Chemistry; East China University of Science and Technology; Xuhui Shanghai 200237 China
| | - Hualin Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process; East China University of Science and Technology; Xuhui Shanghai 200237 China
| | - Honglai Liu
- State Key Laboratory of Chemical Engineering and Department of Chemistry; East China University of Science and Technology; Xuhui Shanghai 200237 China
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