CNT-anchored cellulose fluorescent nanofiber membranes as a fluorescence sensor for Cu2+ and Cr3+

2017 ◽  
Vol 9 (42) ◽  
pp. 6044-6048 ◽  
Author(s):  
Yao Gu ◽  
Meiling Wang ◽  
Guizhen Li
Keyword(s):  
Carbon Nanotubes ◽  
Fluorescence Sensor ◽  
Nanofiber Membranes ◽  
Nanofibrous Membranes ◽  
Subsequent Deacetylation

1,4-Dihydroxyanthraquinone (1,4-DHAQ, a fluorophore) doped carbon nanotubes@cellulose (1,4-DHAQ-doped CNTs@CL) nanofibrous membranes have been prepared via electrospinning and subsequent deacetylation in this work.

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 Synergistic Effect and Characterization of Graphene/Carbon Nanotubes/Polyvinyl Alcohol/Sodium Alginate Nanofibrous Membranes Formed Using Continuous Needleless Dynamic Linear Electrospinning

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 714 ◽  
Author(s):  
Ting-Ting Li ◽  
Yanqin Zhong ◽  
Mengxue Yan ◽  
Wei Zhou ◽  
Wenting Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Synergistic Effect ◽  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Large Scale ◽  
Volume Ratio ◽  
Electrospinning Technique ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Nanofibrous Membranes

In this study, a self-made continuous needleless dynamic linear electrospinning technique is employed to fabricate large-scale graphene (Gr)/carbon nanotubes (CNT)/polyvinyl alcohol (PVA)/sodium alginate (SA) nanofibrous membranes. The synergistic effect of Gr and CNT fillers in the PVA/SA membrane is explored in depth by changing the volume ratio (v/v) of Gr and CNT as 10:0, 8:2, 6:4, 4:6, 2:8, and 0:10. Microstructure, functional group, conductivity, and hydrophilicity of PVA/SA/Gr/CNT membranes was characterized. Results show that the linear electrode needleless electrospinning technique can be spun into 200-nm diameter fibers. The PVA/SA/Gr/CNT fibrous membrane has good hydrophilicity and thermal stability. A Gr/CN ratio of 6:4 possessed the optimal synergistic effect, which showed the lowest surface resistivity of 2.53 × 103 Ω/m2. This study will provide a reference for the large-scale preparation of nanofibrous membrane used as a artificial nerve conduit in the future.

scholarly journals Nanoenabled Bioseparations: Current Developments and Future Prospects

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Sherif Ashraf Fahmy ◽  
Mohamad Alawak ◽  
Jana Brüßler ◽  
Udo Bakowsky ◽  
Mayyada M. H. El Sayed
Keyword(s):  
Carbon Nanotubes ◽  
Amino Acids ◽  
Performance Evaluation ◽  
State Of The Art ◽  
Wide Spectrum ◽  
Nanoporous Membranes ◽  
Future Prospects ◽  
Electrospun Nanofiber ◽  
Nanofiber Membranes ◽  
And Performance

The use of nanomaterials in bioseparations has been recently introduced to overcome the drawbacks of the conventional methods. Different forms of nanomaterials, particularly magnetic nanoparticles (MNPs), carbon nanotubes (CNTs), casted nanoporous membranes, and electrospun nanofiber membranes were utilized in biological separation for the aim of production of different biomolecules such as proteins, amino acids, nucleic acids, and enzymes. This paper critically reviews the state-of-the-art efforts undertaken in this regard, with emphasis on the synthesis and performance evaluation of each nanoform. Challenges and future prospects in developing nanoenabled bioseparations are also discussed, for the purpose of highlighting potential advances in the synthesis and fabrication of novel nanomaterials as well as in the design of efficient nanoenabled processes for separating a wide spectrum of biomolecules.

Preparation and study of low-resistance polyacrylonitrile nano membranes for gas filtration

2016 ◽  
Vol 87 (2) ◽  
pp. 208-215 ◽  
Author(s):  
Li-Hua Lou ◽  
Xiao-Hong Qin ◽  
Hongnan Zhang
Keyword(s):  
Pressure Drop ◽  
Filtration Efficiency ◽  
Special Structure ◽  
Air Filtration ◽  
Gas Filtration ◽  
Low Resistance ◽  
Nanofiber Membranes ◽  
Nanofibrous Membranes ◽  
Bubble Template

In this paper, patterned nanofibrous membranes were fabricated for air filtration. Polyacrylonitrile was employed as the electrospinning material as its fluffy property and bulged bubble template served as collector to prepare the patterned membrane. With this special structure, the pressure drop significantly declined from 151.7 to 24.7 mmH2O, although the filtration efficiency of nanofiber membranes exhibited a slight decline from 99.94% to 96.33% compared to traditional electrospinning nanofibrous membranes. These sharp declines of the pressure drop while retaining the filtration efficiency imply that it could have more extensive applications.

scholarly journals The Removal of Reactive Red 141 from Wastewater: A Study of Dye Adsorption Capability of Water-Stable Electrospun Polyvinyl Alcohol Nanofibers

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Çigdem Akduman ◽  
Seniha Morsümbül ◽  
Emriye Perrin Akçakoca Kumbasar
Keyword(s):  
Polyvinyl Alcohol ◽  
Pore Size ◽  
Surface Area ◽  
Dye Adsorption ◽  
Size Analysis ◽  
Pore Size Analysis ◽  
Electrospinning Method ◽  
Nanofiber Membranes ◽  
Nanofibrous Membranes ◽  
Adsorption Capability

Abstract The dye production and its use in textile and related industries resulted in discharge of dye to wastewater. Adsorption for color removal is known as equilibrium separation process, and the resultant decolorization is influenced by physicochemical factors such as adsorbent surface area. The nanofiber membranes prepared by the electrospinning method have controllable nanofiber diameter and pore size distribution (PSD) with a high surface area to volume or mass ratio. In this study, polyvinyl alcohol (PVA) nanofibrous membranes were prepared by the electrospinning method at different collection times such as 3, 5 and 10 h and heat fixated at 130, 150 and 170°C for 10 min, and then, the adsorption capability of PVA nanofiber membranes for Reactive Red 141 from aqueous solution was investigated. In order to make PVA nanofibers stable to water, the nanofibrous membranes were chemically cross-linked by a polycarboxylic acid (1,2,3,4 butanetetracarboxylic acid (BTCA)). PVA nanofibrous membranes were characterized by scanning electron microscopy, thermogravimetric analysis, swelling tests and pore size analysis. The results indicated that BTCA crosslinking improved the thermal and water stability of the nanofibrous structure but has no significant effect on the pore sizes of the membranes. Adsorption of Reactive Red 141 was studied by the batch technique, and it was observed that PVA nanofibers removed approximately >80% of the dye.

Nanofibrous Membranes Containing Carbon Nanotubes: Electrospun for Redox Enzyme Immobilization

2006 ◽  
Vol 27 (7) ◽  
pp. 516-521 ◽  
Author(s):  
Zhen-Gang Wang ◽  
Zhi-Kang Xu ◽  
Ling-Shu Wan ◽  
Jian Wu ◽  
Christophe Innocent ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Enzyme Immobilization ◽  
Redox Enzyme ◽  
Nanofibrous Membranes
Sign in / Sign up

Export Citation Format

Share Document