High-performance bioelectrocatalysts created by immobilization of an enzyme into carbon-coated composite membranes with nano-tailored structures

2017 ◽  
Vol 5 (38) ◽  
pp. 20244-20251 ◽  
Author(s):  
Tetsuji Itoh ◽  
Yuuta Shibuya ◽  
Akira Yamaguchi ◽  
Yasuto Hoshikawa ◽  
Osamu Tanaike ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Mesoporous Silica ◽  
Composite Membrane ◽  
High Performance ◽  
Direct Electron Transfer ◽  
Composite Membranes ◽  
Silica Nanotubes ◽  
Carbon Coated

We have achieved direct electron transfer between enzymes and electrodes through establishment of a regular enzyme array by encapsulation it in a carbon-coated composite membrane with mesoporous silica nanotubes (C/F127MST).

Direct electron transfer of myoglobin in mesoporous silica KIT-6 modified on screen-printed electrode

2009 ◽  
Vol 142 (1) ◽  
pp. 267-272 ◽  
Author(s):  
Yuanjie Teng ◽  
Xianbo Wu ◽  
Qin Zhou ◽  
Chen Chen ◽  
Hongli Zhao ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Mesoporous Silica ◽  
Direct Electron Transfer ◽  
Screen Printed Electrode ◽  
Screen Printed

An emerging dual collaborative strategy for high-performance tumor therapy with mesoporous silica nanotubes loaded with Mn3O4

2016 ◽  
Vol 4 (46) ◽  
pp. 7406-7414 ◽  
Author(s):  
Yi Zhang ◽  
Jieqiong Tan ◽  
Mei Long ◽  
Huaming Yang ◽  
Shuwen Yuan ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cervical Cancer ◽  
Magnetic Resonance ◽  
Cancer Therapy ◽  
Mesoporous Silica ◽  
High Performance ◽  
Tumor Therapy ◽  
Resonance Imaging ◽  
Silica Nanotubes ◽  
Weighted Magnetic Resonance Imaging

A highly integrated nanocomposite is constructed based on mesoporous silica nanotubes (SiNTs)-loaded with Mn3O4 nanoparticles for cervical cancer therapy via T1-weighted magnetic resonance imaging and doxorubicin-based chemotherapy.

scholarly journals Supported MXene/GO Composite Membranes with Suppressed Swelling for Metal Ion Sieving

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 621
Author(s):  
Zongjie Yin ◽  
Zong Lu ◽  
Yanyan Xu ◽  
Yonghong Zhang ◽  
Liliang He ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Water Purification ◽  
Metal Ion ◽  
High Performance ◽  
Composite Membranes ◽  
Transition Metal Carbide ◽  
Cross Linking ◽  
Metal Carbide ◽  
Ion Exclusion ◽  
The Cross

Novel two-dimensional (2D) membranes have been utilized in water purification or seawater desalination due to their highly designable structure. However, they usually suffer from swelling problems when immersed in solution, which limits their further applications. In this study, 2D cross-linked MXene/GO composite membranes supported on porous polyamide substrates are proposed to improve the antiswelling property and enhance the ion-sieving performance. Transition-metal carbide (MXene) nanosheets were intercalated into GO nanosheets, where the carboxyl groups of GO combined the neighboring hydroxyl terminal groups of MXene with the formation of -COO- bonds between GO and MXene nanosheets via the cross-linking reaction (−OH + −COOH = −COO− + H2O) after heat treatment. The permeation rates of the metal ions (Li+, Na+, K+, Al3+) through the cross-linked MXene/GO composite membrane were 7–40 times lower than those through the pristine MXene/GO membrane. In addition, the cross-linked MXene/GO composite membrane showed excellent Na+ rejection performance (99.3%), which was significantly higher than that through pristine MXene/GO composite membranes (80.8%), showing improved ion exclusion performance. Such a strategy represents a new avenue to develop 2D material-derived high-performance membranes for water purification.

scholarly journals A Facile Method to Control Pore Structure of PVDF/SiO2 Composite Membranes for Efficient Oil/Water Purification

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 803
Author(s):  
Qianqian Xu ◽  
Yuchao Chen ◽  
Tonghu Xiao ◽  
Xing Yang
Keyword(s):  
Synergistic Effect ◽  
Pore Structure ◽  
Composite Membrane ◽  
Water Purification ◽  
High Performance ◽  
Composite Membranes ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oily Water ◽  
Oil Water

The use of poly(vinylidene fluoride) (PVDF) microfiltration (MF) membranes to purify oily water has received much attention. However, it is challenging to obtain high-performance PVDF microfiltration membranes due to severe surface fouling and rapid decline of permeability. This study explored a new approach to fabricate high-performance PVDF/silica (SiO2) composite membrane via the use of a polymer solution featuring lower critical solution temperature (LCST) characteristics and the non-solvent thermally induced phase separation method (NTIPS). Coupling with morphological observations, the membrane formation kinetics were analyzed in depth to understand the synergistic effect between the LCST solution properties and fabrication conditions in NTIPS. Utilizing such a synergistic effect, the transition from finger-like macrovoid pores to bi-continuous highly connected pores could be flexibly tuned by increasing the PVDF concentration and the weight ratio of SiO2/PVDF in the dope solution and by raising the coagulation temperature to above the LCST of the solution. The filtration experiments with surfactant-stabilized oil-water emulsion showed that the permeation flux of the PVDF/SiO2 composite membranes was higher than 318 L·m−2·h−1·bar−1 and the rejection above 99.2%. It was also shown that the PVDF/SiO2 composite membranes, especially those fabricated above the LCST, demonstrated better hydrophilicity, which resulted in significant enhancement in the anti-fouling properties for oil/water emulsion separation. Compared to the benchmark pure PVDF membrane in oily water purification, the optimal composite membrane T70 was demonstrated via the 3-cycle filtration experiments with a significantly improved flux recovery ratio (Frr) and minimal reduced irreversible fouling (Rir). Overall, with the developed method in this work, facile procedure to tune the membrane morphology and pore structure was demonstrated, resulting in high performance composite membranes suitable for oil/water emulsion separation.

Electroactive Polymer Actuator Based on PVDF and Graphene through Electrospinning

2015 ◽  
Vol 1105 ◽  
pp. 311-314 ◽  
Author(s):  
Fan Wang ◽  
Seong Young Ko ◽  
Jong Oh Park ◽  
Suk Ho Park ◽  
Chang Doo Kee
Keyword(s):  
Ionic Conductivity ◽  
Composite Membrane ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Electroactive Polymer ◽  
High Porosity ◽  
Bending Deformation ◽  
Graphene Membrane ◽  
Polymer Actuator

We report a novel high-performance electroactive polymer actuator based on poly (vinylidene fluoride) (i.e., PVDF) and graphene. The PVDF-graphene composite membranes were fabricated through electrospinning method. The electrospun composite membrane has a three-dimensional network structure, high porosity, and large ionic liquid solution uptake which are a prerequisite for high performance dry-type electroactive soft actuators. The conductive poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) layers were deposited on the surfaces of the composite membrane through dipping-drying method. The electroactive PVDF-graphene actuators under both harmonic and step electrical inputs show larger bending deformation and faster response time than the pure PVDF actuator. X-ray diffusion (XRD) and ionic conductivity testing results for the PVDF-graphene membrane were compared with those of pristine PVDF. Most important, the PVDF-graphene actuator shows much larger bending deformation under low input voltage, and this could be due to the synergistic effects of the higher ionic conductivity of PVDF-graphene membrane and the electrochemical doping processes of the PEDOT:PSS electrode layers.

Influence of Microstructure on Performance of TiO2 Nanodots Film Based Biosensor Electrodes

2014 ◽  
Vol 605 ◽  
pp. 155-158
Author(s):  
Mohannad Saleh Hammadi ◽  
Kui Cheng ◽  
Wen Jian Weng
Keyword(s):  
Electron Transfer ◽  
High Performance ◽  
Direct Electron Transfer ◽  
Electrochemical Biosensors ◽  
Key Factors ◽  
Factors Affecting ◽  
Electrode Performance ◽  
Sensor Performance ◽  
Film Microstructure

Electrochemical biosensors are widely applied in areas related to health monitors. Protein adsorptions on the electrode and direct electron transfer between enzymes and electrode have been recognized as key factors affecting sensor performance. In this work, TiO2nanodots films were prepared on Ti substrate to act as electrodes of biosensors. The effect of the nanodots film microstructure on electrode performance was carried out. It was found that the performances H2O2biosensor could be improved by tailoring TiO2nanodots film microstructure in the electrodes. The present work could provide an alternative to obtain biosensor with high performance.

High performance disulfonated poly(arylene ether sulfone)/poly(ethylene oxide) composite membrane used as a novel separator for supercapacitor with neutral electrolyte and activated carbon electrodes

2016 ◽  
Vol 29 (8) ◽  
pp. 984-993 ◽  
Author(s):  
Ruiqi Na ◽  
Xingrui Zhang ◽  
Pengfei Huo ◽  
Yinlong Du ◽  
Guanze Huo ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Composite Membrane ◽  
High Performance ◽  
Aqueous Electrolyte ◽  
Composite Membranes ◽  
Carbon Electrodes ◽  
Arylene Ether ◽  
Neutral Electrolyte ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

High performance disulfonated poly(arylene ether sulfone)/poly(ethylene oxide) (SPAES/PEO) composite membranes were prepared by a simple method such as a novel separator saturated by the lithium sulfate (Li2SO4) aqueous electrolyte for application in supercapacitors (SCs). As prepared composite membranes exhibit excellent mechanical properties and thermal stabilities, which are beneficial for the safety in potential applications, meanwhile, the addition of PEO on membrane also enhanced the affinity with electrolyte and the ion conduction for lithium salts. In addition, the SC cell was fabricated with optimized SPAES/PEO composite membrane and activated carbon electrodes with Li2SO4 aqueous electrolyte. The obtained SC with the SPAES/PEO separator revealed a specific capacitance of 142.5 F g−1 at a current density of 0.1 A g−1. Furthermore, the energy density of the SC was promoted to 19.04 Wh kg−1 due to the wide working voltage range of the neutral electrolyte, and the SC exhibited an excellent coulombic efficiency of almost 99% and nearly 100% cycling retention after 5000 galvanostatic charge/discharge cycles. All of these results indicated that SPAES/PEO composite membrane is suitable as a novel separator for SC.

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