The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform
Jan Migdalski - One of the best experts on this subject based on the ideXlab platform.
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All-Solid-State Reference Electrode with Heterogeneous Membrane
Analytical chemistry, 2016Co-Authors: Andrzej Lewenstam, Teresa Blaz, Jan MigdalskiAbstract:Novel reference electrodes with a solid contact coated by a Heterogeneous polymer Membrane are described. The electrodes are obtained using Ag nanoparticles, AgBr, KBr suspended in tetrahydrofuran solution of PVC and DOS and deposited on Ag substrate, or another substrate covered with Ag, by drop casting. After a short period of soaking in a KBr solution, stable and reproducible formal potentials of −157 ± 2 mV (vs Ag/AgCl/3 M KCl) were observed, and the solid-contact reference electrodes were ready to use. It is shown that the described reference electrodes are relatively insensitive to the changes in the sample matrix, the concentrations of ions, the pH and the redox potential. These electrodes can also be fabricated in miniaturized form, and thus used to produce miniaturized multielectrode probes.
Lei Jiang - One of the best experts on this subject based on the ideXlab platform.
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metal organic framework enhanced speek spsf Heterogeneous Membrane for ion transport and energy conversion
Nano Energy, 2021Co-Authors: Xiaolu Zhao, Xiang-yu Kong, Liping Wen, Linsen Yang, Weipeng Chen, Weiwen Xin, Greg G. Qiao, Lei JiangAbstract:Abstract Bioinspired nanofluidic devices have drawn increasing global interest due to their giant applicable potential in a wide range of fields. By mimicking biological prototype, it is expected to achieve high energy conversion efficiency and tunable ion transport. However, the low osmotic conversion efficiency, weak ion transport capability and poor mechanical performance limit practical application. We designed a class of Heterogeneous Membrane consisting of a support layer and a thin top layer to meet fundamental requirements. To achieve higher power generation, we incorporated metal organic framework (MOF) nanosheets (dispersed phase) into polymer matrix (continuous phase) to afford a mixed matrix top layer. This unique structure addressed the geometric restriction associated with the polymeric specie due to their limited pore accessibility. As a result, the presented Membranes produced high power density of ca. 7 W m−2 and a high energy conversion efficiency of ca. 40% under a salinity gradient of 50 (0.5 M|0.01 M, NaCl). This work thus offers an insight into a new methodology in the development of a novel Membrane technology for highly efficient energy conversion.
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Metal organic framework enhanced SPEEK/SPSF Heterogeneous Membrane for ion transport and energy conversion
Nano Energy, 2021Co-Authors: Xiaolu Zhao, Xiang-yu Kong, Liping Wen, Linsen Yang, Weipeng Chen, Weiwen Xin, Greg G. Qiao, Lei JiangAbstract:Abstract Bioinspired nanofluidic devices have drawn increasing global interest due to their giant applicable potential in a wide range of fields. By mimicking biological prototype, it is expected to achieve high energy conversion efficiency and tunable ion transport. However, the low osmotic conversion efficiency, weak ion transport capability and poor mechanical performance limit practical application. We designed a class of Heterogeneous Membrane consisting of a support layer and a thin top layer to meet fundamental requirements. To achieve higher power generation, we incorporated metal organic framework (MOF) nanosheets (dispersed phase) into polymer matrix (continuous phase) to afford a mixed matrix top layer. This unique structure addressed the geometric restriction associated with the polymeric specie due to their limited pore accessibility. As a result, the presented Membranes produced high power density of ca. 7 W m−2 and a high energy conversion efficiency of ca. 40% under a salinity gradient of 50 (0.5 M|0.01 M, NaCl). This work thus offers an insight into a new methodology in the development of a novel Membrane technology for highly efficient energy conversion.
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Improved osmotic energy conversion in Heterogeneous Membrane boosted by three-dimensional hydrogel interface.
Nature communications, 2020Co-Authors: Zhen Zhang, Liping Wen, Congcong Zhu, Yongchao Qian, Lei JiangAbstract:The emerging Heterogeneous Membranes show unprecedented superiority in harvesting the osmotic energy between ionic solutions of different salinity. However, the power densities are limited by the low interfacial transport efficiency caused by a mismatch of pore alignment and insufficient coupling between channels of different dimensions. Here we demonstrate the use of three-dimensional (3D) gel interface to achieve high-performance osmotic energy conversion through hybridizing polyelectrolyte hydrogel and aramid nanofiber Membrane. The ionic diode effect of the Heterogeneous Membrane facilitates one-way ion diffusion, and the gel layer provides a charged 3D transport network, greatly enhancing the interfacial transport efficiency. When used for harvesting the osmotic energy from the mixing of sea and river water, the Heterogeneous Membrane outperforms the state-of-the-art Membranes, to the best of our knowledge, with power densities of 5.06 W m−2. The diversity of the polyelectrolyte and gel makes our strategy a potentially universal approach for osmotic energy conversion. Heterogeneous Membranes show great promise in harvesting the osmotic energy, but the performance is limited by the low interfacial transport efficiency. Here, the authors report use of a three-dimensional polyelectrolyte gel interface to achieve high-performance osmotic energy conversion.
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Engineered Asymmetric Heterogeneous Membrane: A Concentration-Gradient-Driven Energy Harvesting Device
Journal of the American Chemical Society, 2015Co-Authors: Zhen Zhang, Xiang-yu Kong, Kai Xiao, Qian Liu, Ganhua Xie, Ye Tian, Liping Wen, Lei JiangAbstract:Engineered asymmetric Membranes for intelligent molecular and ionic transport control at the nanoscale have gained significant attention and offer prospects for broad application in nanofluidics, energy conversion, and biosensors. Therefore, it is desirable to construct a high-performance Heterogeneous Membrane capable of coordinating highly selective and rectified ionic transport with a simple, versatile, engineered method to mimic the delicate functionality of biological channels. Here, we demonstrate an engineered asymmetric Heterogeneous Membrane by combining a porous block copolymer (BCP) Membrane, polystyrene-b-poly(4-vinylpyridine) (PS48400-b-P4VP21300), with a track-etched asymmetric porous polyethylene terephthalate Membrane. The introduction of chemical, geometrical, and electrostatic heterostructures provides our Heterogeneous Membrane with excellent anion selectivity and ultrahigh ionic rectification with a ratio of ca. 1075, which is considerably higher than that of existing ionic rectifying ...
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A Bioinspired Multifunctional Heterogeneous Membrane with Ultrahigh Ionic Rectification and Highly Efficient Selective Ionic Gating
Advanced materials (Deerfield Beach Fla.), 2015Co-Authors: Zhen Zhang, Xiang-yu Kong, Kai Xiao, Qian Liu, Ganhua Xie, Ye Tian, Liping Wen, Huacheng Zhang, Lei JiangAbstract:A bioinspired multifunctional Heterogeneous Membrane composed of a block copolymer (PS-b-P4VP) Membrane and a porous anodic alumina Membrane is fabricated. The ionic rectification is so strong that the maximum ratio is approximate to 489, and the chemical actuation of the anion or cation gate from the "OFF" to the "ON" state promotes a 98.5% increase in the channel conductance.
Agata Michalska - One of the best experts on this subject based on the ideXlab platform.
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Polyacrylate microspheres composite for all-solid-state reference electrodes.
The Analyst, 2010Co-Authors: Anna Kisiel, Mikolaj Donten, Jozef Mieczkowski, F. Xavier Rius-ruiz, Krzysztof Maksymiuk, Agata MichalskaAbstract:A novel concept is proposed for the encapsulation of components within polyacrylate microspheres, prior to their incorporation into a Membrane phase. Thus finer and better controlled dispersion of Heterogeneous Membrane components can be achieved. This concept was verified by using a poly(n-butyl acrylate) Membrane-based reference electrode as an example. In this example the proper dispersion of solid constituents of the Heterogeneous Membrane and prevention of their leakage are both of primary importance. Potassium chloride-loaded poly(n-butyl acrylate) microspheres were prepared and then left in contact with silver nitrate to convert some of the KCl into AgCl. The material obtained was introduced into a poly(n-butyl acrylate) Membrane. The reference electrode Membranes obtained in this way were characterized with much more stable potential (both in different electrolytes and over time) compared with electrodes prepared by the direct introduction of KCl and AgCl to the Membrane.
Andrzej Lewenstam - One of the best experts on this subject based on the ideXlab platform.
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All-Solid-State Reference Electrode with Heterogeneous Membrane
Analytical chemistry, 2016Co-Authors: Andrzej Lewenstam, Teresa Blaz, Jan MigdalskiAbstract:Novel reference electrodes with a solid contact coated by a Heterogeneous polymer Membrane are described. The electrodes are obtained using Ag nanoparticles, AgBr, KBr suspended in tetrahydrofuran solution of PVC and DOS and deposited on Ag substrate, or another substrate covered with Ag, by drop casting. After a short period of soaking in a KBr solution, stable and reproducible formal potentials of −157 ± 2 mV (vs Ag/AgCl/3 M KCl) were observed, and the solid-contact reference electrodes were ready to use. It is shown that the described reference electrodes are relatively insensitive to the changes in the sample matrix, the concentrations of ions, the pH and the redox potential. These electrodes can also be fabricated in miniaturized form, and thus used to produce miniaturized multielectrode probes.
Anna Kisiel - One of the best experts on this subject based on the ideXlab platform.
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Polyacrylate microspheres composite for all-solid-state reference electrodes.
The Analyst, 2010Co-Authors: Anna Kisiel, Mikolaj Donten, Jozef Mieczkowski, F. Xavier Rius-ruiz, Krzysztof Maksymiuk, Agata MichalskaAbstract:A novel concept is proposed for the encapsulation of components within polyacrylate microspheres, prior to their incorporation into a Membrane phase. Thus finer and better controlled dispersion of Heterogeneous Membrane components can be achieved. This concept was verified by using a poly(n-butyl acrylate) Membrane-based reference electrode as an example. In this example the proper dispersion of solid constituents of the Heterogeneous Membrane and prevention of their leakage are both of primary importance. Potassium chloride-loaded poly(n-butyl acrylate) microspheres were prepared and then left in contact with silver nitrate to convert some of the KCl into AgCl. The material obtained was introduced into a poly(n-butyl acrylate) Membrane. The reference electrode Membranes obtained in this way were characterized with much more stable potential (both in different electrolytes and over time) compared with electrodes prepared by the direct introduction of KCl and AgCl to the Membrane.