Photoreactive Superhydrophobic Organic–Inorganic Hybrid Materials Composed of Poly(vinylidene fluoride) and Titanium Dioxide-Supported Perfluorinated Phthalocyanines

2019 ◽  
Vol 1 (6) ◽  
pp. 1514-1523 ◽  
Author(s):  
Abdul Azeez ◽  
Lauren Polio ◽  
James E. Hanson ◽  
Sergiu M. Gorun
Keyword(s):  
Titanium Dioxide ◽  
Hybrid Materials ◽  
Vinylidene Fluoride ◽  
Inorganic Hybrid ◽  
Poly Vinylidene Fluoride

scholarly journals Preparation and Electrochemical Characterization of Organic–Inorganic Hybrid Poly(Vinylidene Fluoride)-SiO2 Cation-Exchange Membranes by the Sol-Gel Method Using 3-Mercapto-Propyl-Triethoxyl-Silane

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3265 ◽  
Author(s):  
Li ◽  
Li ◽  
Li ◽  
Guan ◽  
Zheng ◽  
...  
Keyword(s):  
Membrane Potential ◽  
Oxidative Stability ◽  
Water Uptake ◽  
Polyvinylidene Fluoride ◽  
Vinylidene Fluoride ◽  
Sol Gel ◽  
Synthesis Method ◽  
Co2 Production ◽  
Inorganic Hybrid ◽  
Poly Vinylidene Fluoride

A new synthesis method for organic–inorganic hybrid Poly(vinylidene fluoride)-SiO2 cation-change membranes (CEMs) is proposed. This method involves mixing tetraethyl orthosilicate (TEOS) and 3-mercapto-propyl-triethoxy-silane (MPTES) into a polyvinylidene fluoride (PVDF) sol-gel solution. The resulting slurry was used to prepare films, which were immersed in 0.01 M HCl, which caused hydrolysis and polycondensation between the MPTES and TEOS. The resulting Si-O-Si polymers chains intertwined and/or penetrated the PVDF skeleton, significantly improving the mechanical strength of the resulting hybrid PVDF-SiO2 CEMs. The -SH functional groups of MPTES oxidized to-SO3H, which contributed to the excellent permeability of these CEMs. The surface morphology, hybrid structure, oxidative stability, and physicochemical properties (IEC, water uptake, membrane resistance, membrane potential, transport number, and selective permittivity) of the CEMs obtained in this work were characterized using scanning electron microscope and Fourier transform infrared spectroscopy, as well as electrochemical testing. Tests to analyze the oxidative stability, water uptake, membrane potential, and selective permeability were also performed. Our organic–inorganic hybrid PVDF-SiO2 CEMs demonstrated higher oxidative stability and lower resistance than commercial Ionsep-HC-C membranes with a hydrocarbon structure. Thus, the synthesis method described in this work is very promising for the production of very efficient CEMs. In addition, the physical and electrochemical properties of the PVDF-SiO2 CEMs are comparable to the Ionsep-HC-C membranes. The electrolysis of the concentrated CoCl2 solution performed using PVDF-SiO2-6 and Ionsep-HC-C CEMs showed that at the same current density, Co2+ production, and current efficiency of the PVDF-SiO2-6 CEM membrane were slightly higher than those obtained using the Ionsep-HC-C membrane. Therefore, our novel membrane might be suitable for the recovery of cobalt from concentrated CoCl2 solutions.

Charge-transfer complex versus σ-complex formed between TiO2and bis(dicyanomethylene) electron acceptors

2015 ◽  
Vol 17 (41) ◽  
pp. 27343-27356 ◽  
Author(s):  
Jun-ichi Fujisawa ◽  
Morio Nagata ◽  
Minoru Hanaya
Keyword(s):  
Titanium Dioxide ◽  
Charge Transfer ◽  
Hybrid Materials ◽  
Charge Transfer Complex ◽  
Electron Acceptors ◽  
Inorganic Hybrid ◽  
Complex Versus

A novel group of organic–inorganic hybrid materials is created by the combination of titanium dioxide (TiO2) nanoparticles with bis(dicyanomethylene) (TCNX) electron acceptors.

Air bubbles induced piezophotocatalytic degradation of organic pollutants using nanofibrous poly(vinylidene fluoride)-titanium dioxide hybrid

2019 ◽  
Vol 493 ◽  
pp. 1268-1277 ◽  
Author(s):  
Arulappan Durairaj ◽  
Subramaniyan Ramasundaram ◽  
Thangavel Sakthivel ◽  
Subramanian Ramanathan ◽  
Ashiqur Rahaman ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Organic Pollutants ◽  
Vinylidene Fluoride ◽  
Air Bubbles ◽  
Poly Vinylidene Fluoride

Fabrication of Stretchable Organic–Inorganic Hybrid Thin-Film Transistors on Polyimide Stiff-Island Structures

2015 ◽  
Vol 15 (10) ◽  
pp. 7526-7530 ◽  
Author(s):  
Soon-Won Jung ◽  
Jae Bon Koo ◽  
Chan Woo Park ◽  
Bock Soon Na ◽  
Ji-Young Oh ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Gate Dielectric ◽  
Vinylidene Fluoride ◽  
Channel Structure ◽  
Gate Insulator ◽  
Oxide Semiconductor ◽  
Hybrid Thin Film ◽  
Inorganic Hybrid ◽  
Poly Vinylidene Fluoride

In this study, stretchable organic–inorganic hybrid thin-film transistors (TFTs) are fabricated on a polyimide (PI) stiff-island/elastomer substrate using blends of poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] and poly(methyl methacrylate) (PMMA) and oxide semiconductor In-Ga-Zn-O as the gate dielectric and semiconducting layer, respectively. Carrier mobility, Ion/Ioff ratio, and subthreshold swing (SS) values of 6.1 cm2 V−1 s−1, 107, and 0.2 V/decade, respectively, were achieved. For the hybrid TFTs, the endurable maximum strain without degradation of electrical properties was approximately 49%. These results correspond to those obtained in the first study on fabrication of stretchable hybrid-type TFTs on elastomer substrate using an organic gate insulator and oxide semiconducting active channel structure, thus indicating the feasibility of a promising device for stretchable electronic systems.

An attempt to fabricate a photocatalytic and hydrophobic self-cleaning coating via electrospinning

RSC Advances ◽  
2014 ◽  
Vol 4 (73) ◽  
pp. 38498-38504 ◽  
Author(s):  
Prathapan Ragesh ◽  
Shantikumar V. Nair ◽  
A. Sreekumaran Nair
Keyword(s):  
Titanium Dioxide ◽  
Vinylidene Fluoride ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Poly Vinylidene Fluoride ◽  
Resultant Solution ◽  
Self Cleaning

Fluorinated POSS (polyhedral oligomeric silsesquioxanes, F-POSS) was blended with PVDF (poly (vinylidene fluoride)/TiO2 (titanium dioxide) composite by stirring overnight and the resultant solution was electrospun to obtain F-POSS/PVDF/TiO2 micron- and nanofibers with self-cleaning capacity.

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