To satisfy the ever-increasing energy demands, it is of the utmost importance to develop electrochemical materials capable of producing and storing energy in a highly efficient manner. Titanium dioxide (TiO) has recently emerged as a promising choice in this field due to its non-toxicity, low cost, and eco-friendliness, in addition to its porosity, large surface area, good mechanical strength, and remarkable transport properties. Here, we present titanium dioxide nanoplates/polyvinylidene fluoride (TiO/PVDF) membranes prepared by a straightforward hydrothermal strategy and vacuum filtration process. The as-synthesized TiO/PVDF membrane was applied for energy storage applications. The fabricated TiO/PVDF membrane served as the negative electrode for supercapacitors (SCs). The electrochemical properties of a TiO/PVDF membrane were explored in an aqueous 6 M KOH electrolyte that exhibited good energy storage performance. Precisely, the TiO/PVDF membrane delivered a high specific capacitance of 283.74 F/g at 1 A/g and maintained capacitance retention of 91% after 8000 cycles. Thanks to the synergistic effect of TiO and PVDF, the TiO/PVDF membrane provided superior electrochemical performance as an electrode for a supercapacitor. These superior properties will likely be used in next-generation energy storage technologies.
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http://dx.doi.org/10.3390/molecules28010285 | DOI Listing |
Environ Sci Pollut Res Int
December 2024
Institute of Biosystem Engineering, Faculty of Engineering, University of Szeged, Moszkvai Blvd. 9, HU-6725, Szeged, Hungary.
This comparative study investigates the modification of polyvinylidene fluoride (PVDF) membranes with different nanoparticles (TiO or TiO-based composites containing BiVO and/or CNT), using three distinct methods (blending, coating, and grafting) and polyvinylpyrrolidone (PVP). The objective was to enhance the photocatalytic and filtration performance for the separation of oil-in-water emulsions. Regarding the UV activity, the PVDF-TiO/CNT/PVP-coated membrane presented the best performance.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
November 2024
Public Works Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt.
Pharmaceuticals and personal care products (PPCPs) are prevalent emerging pollutants in the aquatic environment. The photocatalysis process has proven high efficiency in degrading PPCPs; however, the fate and repercussions of photocatalyst residuals are a major concern. To avoid that, we developed a composite from graphitic carbon nitride/tungsten doped with titanium dioxide (g-CN/W-TiO) and loaded it on polyvinylidene fluoride (PVDF) membranes by the phase-inversion method.
View Article and Find Full Text PDFLangmuir
November 2024
College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, China.
Membrane separation technology is used to treat environmental wastewater, but during the treatment process, the occurrence of membrane fouling greatly affects the treatment efficiency. To address this phenomenon, improve membrane antipollution capabilities, and treat organic wastewater, photocatalysis and membrane separation technology have been coupled, forming a suitable and promising treatment method. Here, we propose a simple strategy to prepare a polyvinylidene fluoride/polyvinyl pyrrolidone nitrogen-doped titanium dioxide fibrous membrane (PVDF/PVP N-doped TiO fibrous membrane).
View Article and Find Full Text PDFJ Colloid Interface Sci
February 2025
College of Chemical Engineering, Northwest Minzu University, Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu ProvinceGa, Gansu Province Research Center for Basic Sciences of Surface and Interface Chemistry, Lanzhou, Gansu 730030, PR China. Electronic address:
J Hazard Mater
October 2024
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
Emerging contaminants (ECs) in secondary effluent of wastewater treatment plants (WWTPs) have received increasing attention due to their adverse effects on aquatic ecosystems and human health. Herein, visible-light responsive photocatalyst TM (TiO @NH-MIL-101(Fe)) and resultant photocatalytic ultrafiltration (PUF, PVDF/TM) membrane were prepared to remove 32 typical compounds of antibiotics, 296 compounds of antibiotic resistance genes (ARGs), and their corresponding bacterial hosts. The construction of heterojunction photocatalyst promoted the electron transfer from NH-MIL-101(Fe) to TiO and the formation of N-TiO, enhancing visible-light (λ ≥ 420 nm) photocatalytic activity.
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