Electrospinning preparation of a H4SiW12O40/polycaprolactam composite nanofibrous membrane and its greatly enhanced photocatalytic activity and mechanism

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12491-12496 ◽  
Author(s):  
Wei Li ◽  
Tingting Li ◽  
Xuegang Ma ◽  
Yuanliang Li ◽  
Libao An ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Average Diameter ◽  
Nanofibrous Membrane ◽  
Electrospinning Technique ◽  
Nanofibrous Membranes

H4SiW12O40/polycaprolactam (PA6) composite nanofibrous membranes with a minimum average diameter of ∼70 nm were prepared by an electrospinning technique.

In situ synthesis of flexible hierarchical TiO2 nanofibrous membranes with enhanced photocatalytic activity

2015 ◽  
Vol 3 (44) ◽  
pp. 22136-22144 ◽  
Author(s):  
Renzhong Zhang ◽  
Xueqin Wang ◽  
Jun Song ◽  
Yang Si ◽  
Xingmin Zhuang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Organic Dyes ◽  
In Situ Synthesis ◽  
Electrospinning Technique ◽  
Excellent Photocatalytic Activity ◽  
Nanofibrous Membranes

Flexible hierarchical mesoporous TiO2 NP modified TiO2 nanofibrous membranes with excellent photocatalytic activity towards organic dyes were fabricated by the combination of an electrospinning technique and in situ polymerization.

Preparation of Ultrafine TiO2 Nanofibers and their Application in Removal of NOx in Air

2008 ◽  
Vol 569 ◽  
pp. 25-28 ◽  
Author(s):  
Kannikar Juengsuwattananon ◽  
Pim On Rujitanaroj ◽  
Pitt Supaphol ◽  
Nuttaporn Pimpha ◽  
Sadao Matsuzawa
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Average Diameter ◽  
Ethanol Solution ◽  
Catalyst Loading ◽  
X Ray Diffraction ◽  
Electrospinning Technique ◽  
Tio2 Nanofiber ◽  
Transmission Electron ◽  
Titania Precursor

Titanium dioxide nanofibers were fabricated by electrospinning technique. The titania solutions were obtained from adding various types of Ti precursor (Ti(OBu)4, Ti(OiPr)4, and Ti(OPr)4) to an ethanol solution containing polyvinyl pyrrolidone (PVP). Acetic acid was used to stabilize the solution and to control the hydrolysis reaction. The porous and well-defined crystalline structure was obtained after calcined at 450oC for 1 h. The thermal behavior, phase composition including crystallite size, as well as the morphology of as-synthesized nanofibers was obtained from thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The average diameter of these nanofibers was in the range from 100 to 400 nm depending on titania precursor. The photocatalytic activity of TiO2 fibers were evaluated for NOx degradation in a gaseous phase. The results demonstrated that at the same catalyst loading, the photocatalytic activity of TiO2 nanofiber was higher than the commercial Degussa P-25.

Fabrication of a well-aligned TiO2 nanofibrous membrane by modified parallel electrode configuration with enhanced photocatalytic performance

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31476-31483 ◽  
Author(s):  
Jianan Wang ◽  
Guorui Yang ◽  
Ling Wang ◽  
Wei Yan
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Electrode Configuration ◽  
Nanofibrous Membrane ◽  
Excellent Photocatalytic Activity ◽  
Nanofibrous Membranes ◽  
Parallel Electrode

Well-aligned TiO2 nanofibrous membranes with excellent photocatalytic activity were prepared over large areas by a modified electrospinning configuration.

Electrospun nanofibrous membranes of cellulose acetate containing hydroxyapatite co-doped with Ag/Fe: morphological features, antibacterial and degradation of methylene blue from aqueous solutions

2021 ◽  
Author(s):  
Ahmed Esmail Shalan ◽  
M. Afifi ◽  
M.M. El-Desoky ◽  
M.k Ahmed
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Cellulose Acetate ◽  
Morphological Features ◽  
Molar Ratio ◽  
Electrospinning Technique ◽  
Nanofiber Membranes ◽  
Nanofibrous Membranes ◽  
Co Doped

Cellulose acetate nanofiber membranes containing hydroxyapatite co-doped with Ag/Fe were efficaciously attained through the electrospinning technique. Different molar ratio compositions of hydroxyapatite co-doped with Ag/Fe in the structure of the...

scholarly journals Electrospun Nanostructured Membrane Engineering Using Reverse Osmosis Recycled Modules: Membrane Distillation Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1601
Author(s):  
Jorge Contreras-Martínez ◽  
Carmen García-Payo ◽  
Mohamed Khayet
Keyword(s):  
Reverse Osmosis ◽  
Polyvinylidene Fluoride ◽  
Membrane Distillation ◽  
Permeate Flux ◽  
Electrospinning Technique ◽  
Salt Rejection ◽  
Rejection Factor ◽  
Nanofibrous Membranes ◽  
Membrane Engineering ◽  
Desalination Plants

As a consequence of the increase in reverse osmosis (RO) desalination plants, the number of discarded RO modules for 2020 was estimated to be 14.8 million annually. Currently, these discarded modules are disposed of in nearby landfills generating high volumes of waste. In order to extend their useful life, in this research study, we propose recycling and reusing the internal components of the discarded RO modules, membranes and spacers, in membrane engineering for membrane distillation (MD) technology. After passive cleaning with a sodium hypochlorite aqueous solution, these recycled components were reused as support for polyvinylidene fluoride nanofibrous membranes prepared by electrospinning technique. The prepared membranes were characterized by different techniques and, finally, tested in desalination of high saline solutions (brines) by direct contact membrane distillation (DCMD). The effect of the electrospinning time, which is the same as the thickness of the nanofibrous layer, was studied in order to optimize the permeate flux together with the salt rejection factor and to obtain robust membranes with stable DCMD desalination performance. When the recycled RO membrane or the permeate spacer were used as supports with 60 min electrospinning time, good permeate fluxes were achieved, 43.2 and 18.1 kg m−2 h−1, respectively; with very high salt rejection factors, greater than 99.99%. These results are reasonably competitive compared to other supported and unsupported MD nanofibrous membranes. In contrast, when using the feed spacer as support, inhomogeneous structures were observed on the electrospun nanofibrous layer due to the special characteristics of this spacer resulting in low salt rejection factors and mechanical properties of the electrospun nanofibrous membrane.

Development and characterization of electrospun curcumin-loaded antimicrobial nanofibrous membranes

2020 ◽  
pp. 004051752092551
Author(s):  
Javeed A Awan ◽  
Saif Ur Rehman ◽  
Muhammad Kashif Bangash ◽  
Fiaz Hussain ◽  
Jean-Noël Jaubert
Keyword(s):  
Biological Activities ◽  
Research Work ◽  
Medical Applications ◽  
Electrospinning Technique ◽  
Naturally Occurring ◽  
Wide Range ◽  
Nanofibrous Membranes ◽  
Antimicrobial Barrier ◽  
Anti Hiv

Curcumin is a naturally occurring hydrophobic polyphenol compound. It exhibits a wide range of biological activities such as antibacterial, anti-inflammatory, anti-carcinogenic, antifungal, anti-HIV, and antimicrobial activity. In this research work, antimicrobial curcumin nanofibrous membranes are produce by an electrospinning technique using the Eudragit RS 100 (C19H34ClNO6) polymer solution enriched with curcumin. The morphology and chemistry of the membrane are analyzed using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Kirby Bauer disk diffusion tests are carried out to examine the antibacterial effectiveness of the membrane. Experimental results show that the nanofibers produced are of uniform thickness morphology and curcumin is successfully incorporated into the nanofibrous mat, while no chemical bonding was observed between curcumin and the polymer. The antimicrobial curcumin nanofibrous membranes can be effectively applied as antimicrobial barrier in a wide variety of medical applications such as wound healing, scaffolds, and tissue engineering.

MOF-based C-doped coupled TiO2/ZnO nanofibrous membrane with crossed network connection for enhanced photocatalytic activity

2019 ◽  
Vol 777 ◽  
pp. 982-990 ◽  
Author(s):  
Xuebin Hou ◽  
Sarah Louise Stanley ◽  
Min Zhao ◽  
Jin Zhang ◽  
Huimin Zhou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Nanofibrous Membrane ◽  
Network Connection

scholarly journals Starch-based and multi-purpose nanofibrous membrane for high efficiency nanofiltration

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35368-35375 ◽  
Author(s):  
Sarekha Woranuch ◽  
Autchara Pangon ◽  
Kantapat Puagsuntia ◽  
Nakarin Subjalearndee ◽  
Varol Intasanta
Keyword(s):  
High Efficiency ◽  
Rice Flour ◽  
Nanofibrous Membrane ◽  
Nanofibrous Membranes

The objective of the present work is to develop nanofibrous membranes from rice-flour based nanofibers containing PVA for high efficiency filtration.

scholarly journals Adsorption/desorption and biofunctional properties of oleuropein loaded on different types of silk fibroin matrices

2017 ◽  
Vol 36 (1) ◽  
Author(s):  
Oguz Bayraktar ◽  
Ali Bora Balta ◽  
Guldemet Basal Bayraktar
Keyword(s):  
Silk Fibroin ◽  
Antibacterial Properties ◽  
Average Diameter ◽  
Electrospinning Technique ◽  
Collector Plate ◽  
Regenerated Silk Fibroin ◽  
Different Types ◽  
Healing Property ◽  
Silk Fibroin Nanofibers ◽  
Adsorption Desorption

The objective of this study was to investigate the adsorption/desorption behavior of oleuropein on different types of silk fibroin matrices including silk fibroin microfibers (MF), regenerated silk fibroin (RSF), and silk fibroin nanofibers (NF). Nanofibers with an average diameter of ranging between 24 and 326 nm were successfully prepared using the electrospinning technique. The effects of the silk fibroin concentration, the voltage applied and the distance between needle tip and collector plate on the morphology of the NF were investigated. The adsorption capacities of MF, RSF and NF were determined as 104.92, 163.07 and 228.34 mg oleuropein per gram of material, respectively. The percentage of initially adsorbed oleuropein that was desorbed was 86.08, 91.29 and 96.67% for MF, RSF and NF, respectively.NF and RSF discs loaded with oleuropein were subjected to disc diffusion assays to determine their antibacterial activity against test microorganisms Staphylococcus epidermidis (Gram +) and Escherichia coli (Gram – ). The results showed that both biomaterials possessed antibacterial properties after loading with oleuropein. Wound scratch assays using oleuropein released from NF revealed an enhancement of cell migration, indicating a wound healing property of the material.In conclusion, the NF can be utilized as a biofunctional polymeric material with better performance for the adsorption and desorption of oleuropein compared with MF and RSF.

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