ELECTROSPUN NANOFIBER-COATED MEMBRANE: A REVIEW

2016 ◽  
Vol 78 (12) ◽  
Author(s):  
Nurafiqah Rosman ◽  
W. N. W. Salleh ◽  
Mohamad Azuwa Mohamed ◽  
N. H. Ismail ◽  
N. Sazali ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Membrane Distillation ◽  
Water Remediation ◽  
Reverse Direction ◽  
Water Molecules ◽  
Membrane Material ◽  
Electrospun Nanofiber ◽  
Environmental Application ◽  
Coated Membrane

The nanofibre development offers various useful applications in many ways including energy and environmental application. Polymeric nanofibre fabricated by electrospinning has been seen as innovative membrane materials for water remediation owing to the high surface area, interconnected porous structure, and light weight. This paper reviews the exciting functionality of nanofibre involving the development of smart heterogeneous approaches in membrane material. These heterogeneous materials allow the water molecules to spontaneously penetrate from one side to another, while blocking penetration in reverse direction due to hydrophilic-hydrophobic differences. Composite membrane containing different features arrangements of nanofibres have been utilised for their ability for water applications especially in membrane distillation.

scholarly journals Electrospun Nanofibers for Sensing and Biosensing Applications—A Review

2021 ◽  
Vol 22 (12) ◽  
pp. 6357
Author(s):  
Kinga Halicka ◽  
Joanna Cabaj
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Toxic Metal ◽  
Volume Ratio ◽  
Electrospun Nanofibers ◽  
Clinical Diagnostics ◽  
Loading Capacity ◽  
Electrospun Nanofiber ◽  
Sensing Platforms ◽  
Different Types

Sensors and biosensors have found applications in many areas, e.g., in medicine and clinical diagnostics, or in environmental monitoring. To expand this field, nanotechnology has been employed in the construction of sensing platforms. Because of their properties, such as high surface area to volume ratio, nanofibers (NFs) have been studied and used to develop sensors with higher loading capacity, better sensitivity, and faster response time. They also allow to miniaturize designed platforms. One of the most commonly used techniques of the fabrication of NFs is electrospinning. Electrospun NFs can be used in different types of sensors and biosensors. This review presents recent studies concerning electrospun nanofiber-based electrochemical and optical sensing platforms for the detection of various medically and environmentally relevant compounds, including glucose, drugs, microorganisms, and toxic metal ions.

scholarly journals Recent Advances in Applications of Ceramic Nanofibers

2021 ◽  
Author(s):  
Nuray Kizildag
Keyword(s):  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Ceramic Materials ◽  
Water Remediation ◽  
Mechanical And Thermal Properties ◽  
Chemical Erosion ◽  
Recent Advances ◽  
Wide Range ◽  
Ceramic Nanofibers

Ceramic materials are well known for their hardness, inertness, superior mechanical and thermal properties, resistance against chemical erosion and corrosion. Ceramic nanofibers were first manufactured through a combination of electrospinning with sol–gel method in 2002. The electrospun ceramic nanofibers display unprecedented properties such as high surface area, length, thermo-mechanical properties, and hierarchically porous structure which make them candidates for a wide range of applications such as tissue engineering, sensors, water remediation, energy storage, electromagnetic shielding, thermal insulation materials, etc. This chapter focuses on the most recent advances in the applications of ceramic nanofibers.

scholarly journals A review on advanced nanofiber technology for membrane distillation

2019 ◽  
Vol 14 ◽  
pp. 155892501882490 ◽  
Author(s):  
Fatma Yalcinkaya
Keyword(s):  
Tissue Engineering ◽  
Surface Area ◽  
Wound Dressing ◽  
High Surface ◽  
High Surface Area ◽  
Membrane Distillation ◽  
Operating Parameters ◽  
Polymeric Nanofibers ◽  
Highly Porous ◽  
Comprehensive Study

The importance of the nanofiber webs increases rapidly due to their highly porous structure, narrow pore size, and distribution; specific surface area and compatibility with inorganics. Electrospinning has been introduced as one of the most efficient technique for the fabrication of polymeric nanofibers due to its ability to fabricate nanostructures with unique properties such as a high surface area and porosity. The process and the operating parameters affect the nanofiber fabrication and the application of nanofibers in various fields, such as sensors, tissue engineering, wound dressing, protective clothes, filtration, desalination, and distillation. In this review, a comprehensive study is presented on the parameters of electrospinning system including applications. More emphasis is given to the application of nanofibers in membrane distillation (MD). The research developments and the current situation of the nanofiber webs in MD are also discussed.

scholarly journals Progress on the Fabrication and Application of Electrospun Nanofiber Composites

Membranes ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 204 ◽  
Author(s):  
Mariela Toriello ◽  
Morteza Afsari ◽  
Ho Kyong Shon ◽  
Leonard D. Tijing
Keyword(s):  
Composite Nanofibers ◽  
Materials Science ◽  
High Surface ◽  
High Surface Area ◽  
Electrospun Nanofibers ◽  
Electrospun Nanofiber ◽  
Environment And Health ◽  
Energy Environment ◽  
The Many ◽  
Remarkable Progress

Nanofibers are one of the most attractive materials in various applications due to their unique properties and promising characteristics for the next generation of materials in the fields of energy, environment, and health. Among the many fabrication methods, electrospinning is one of the most efficient technologies which has brought about remarkable progress in the fabrication of nanofibers with high surface area, high aspect ratio, and porosity features. However, neat nanofibers generally have low mechanical strength, thermal instability, and limited functionalities. Therefore, composite and modified structures of electrospun nanofibers have been developed to improve the advantages of nanofibers and overcome their drawbacks. The combination of electrospinning technology and high-quality nanomaterials via materials science advances as well as new modification techniques have led to the fabrication of composite and modified nanofibers with desired properties for different applications. In this review, we present the recent progress on the fabrication and applications of electrospun nanofiber composites to sketch a progress line for advancements in various categories. Firstly, the different methods for fabrication of composite and modified nanofibers have been investigated. Then, the current innovations of composite nanofibers in environmental, healthcare, and energy fields have been described, and the improvements in each field are explained in detail. The continued growth of composite and modified nanofiber technology reveals its versatile properties that offer alternatives for many of current industrial and domestic issues and applications.

scholarly journals Review of organic and inorganic pollutants removal by biochar and biochar-based composites

Biochar ◽  
2021 ◽  
Author(s):  
Liping Liang ◽  
Fenfen Xi ◽  
Weishou Tan ◽  
Xu Meng ◽  
Baowei Hu ◽  
...  
Keyword(s):  
Composite Materials ◽  
Physicochemical Properties ◽  
Environmental Remediation ◽  
High Surface ◽  
High Surface Area ◽  
Water Remediation ◽  
Research Progress ◽  
Water Contaminants ◽  
Adsorption Mechanisms ◽  
Pollutants Removal

AbstractBiochar (BC) has exhibited a great potential to remove water contaminants due to its wide availability of raw materials, high surface area, developed pore structure, and low cost. However, the application of BC for water remediation has many limitations. Driven by the intense desire of overcoming unfavorable factors, a growing number of researchers have carried out to produce BC-based composite materials, which not only improved the physicochemical properties of BC, but also obtained a new composite material which combined the advantages of BC and other materials. This article reviewed previous researches on BC and BC-based composite materials, and discussed in terms of the preparation methods, the physicochemical properties, the performance of contaminant removal, and underlying adsorption mechanisms. Then the recent research progress in the removal of inorganic and organic contaminants by BC and BC-based materials was also systematically reviewed. Although BC-based composite materials have shown high performance in inorganic or organic pollutants removal, the potential risks (such as stability and biological toxicity) still need to be noticed and further study. At the end of this review, future prospects for the synthesis and application of BC and BC-based materials were proposed. This review will help the new researchers systematically understand the research progress of BC and BC-based composite materials in environmental remediation.

Crystal Structure, Short-Range Oxygen Defects, and Water Adsorption in La- and Nd-Modified ZrO2

1994 ◽  
Vol 376 ◽  
Author(s):  
C.-K. Loong ◽  
J. W. Richardson ◽  
L. E. Iton ◽  
M. Ozawa
Keyword(s):  
Crystal Structure ◽  
Inelastic Neutron Scattering ◽  
High Surface ◽  
High Surface Area ◽  
Inelastic Neutron ◽  
Water Molecules ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Oxygen Defects ◽  
Surface Hydroxyl Groups

ABSTRACTDoping Rare-earth (RE) elements to ZrO2 helps stabilize the cubic and tetragonal phases and improves resistance to thermal shock and sintering at high temperatures. Since a RE ion has a lower valency (3+) than Zr ion (4+), oxygen vacancies are formed to preserve electroneutrality. We have studied the crystal structure of La0.1Zro.9O1.95 and Nd0.1Zr0.9O1.95 by neutron diffraction and examined the associated oxygen defects by a Fourier transform of the filtered residual diffuse scattering. The hydration process was investigated by inelastic neutron-scattering measurements of the hydrogen vibrational density of states of the surface hydroxyl groups and physisorbed water on these fine powders. We compare the O-H stretch vibrations from samples with only surface hydroxyl groups to multilayer coverage of water molecules. The decreasing energies and increasing widths of the O-H stretch bands with increasing H2O coverage indicate the influence of hydrogen bonding on the motion of water molecules. Similar elastic and inelastic experiments were also performed on a high surface-area pure ZrO2 powder.

scholarly journals Electrospun nanofiber-based soft electronics

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yan Wang ◽  
Tomoyuki Yokota ◽  
Takao Someya
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Electrospun Nanofibers ◽  
Future Research ◽  
Stretchable Electronics ◽  
Electrospun Nanofiber ◽  
Storage Devices ◽  
Stretchable Conductors ◽  
Future Research Directions ◽  
Soft Electronics

AbstractElectrospun nanofibers have received considerable attention in the field of soft electronics owing to their promising advantages and superior properties in flexibility and/or stretchability, conductivity, and transparency; furthermore, their one-dimensional nanostructure, high surface area, and diverse fibrous morphologies are also desirable. Herein, we provide an overview of electrospun nanofiber-based soft electronics. A brief introduction of the unique structure and properties of electrospun nanofiber materials is provided, and assembly strategies for flexible/stretchable electronics are highlighted. We then summarize the latest progress in the design and fabrication of representative flexible/stretchable electronic devices utilizing electrospun nanofibers, such as flexible/stretchable conductors, sensors, energy harvesting and storage devices, and transistors. Finally, a conclusion and several future research directions for electrospun nanofiber-based soft electronics are proposed.

Recent Development on Titania Based Mixed Oxide Photocatalysts for Environmental Application under Visible Light

2012 ◽  
Vol 734 ◽  
pp. 186-214 ◽  
Author(s):  
Noor Aman ◽  
Trilochan Mishra
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Mixed Oxide ◽  
Photocatalytic Oxidation ◽  
Anatase Phase ◽  
High Surface ◽  
High Surface Area ◽  
Toxic Metal ◽  
Oxide Semiconductor ◽  
Environmental Application

In the recent years most of the studies are confined to the mixing of ZrO2, SiO2, WO4 or ceria with titania in different composition so as to stabilize anatase phase, maintain high surface area and increase visible light absorption for better photocatalytic activity. Method of synthesis also helps in effective doping and enhancing surface area of the resultant materials. Nonmetal doping of oxide semiconductor materials facilitates the visible light application of photocatalysis. Based on the recent literature this review elaborately discuss on the development of titania based mixed oxide catalyst with or without different doping for visible light application. In addition this review deals with critical analysis of these materials towards photocatalytic oxidation of organics and reduction of pollutants like toxic metal ions and nitrates.

In Situ microscopy of the anodic etching of silicon

1995 ◽  
Vol 53 ◽  
pp. 232-233
Author(s):  
Frances M. Ross ◽  
Peter C. Searson
Keyword(s):  
Composite Structures ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Selective Etching ◽  
Silicon On Insulator ◽  
Second Phase ◽  
Porous Layers ◽  
New Class ◽  
Porous Semiconductors

Porous semiconductors represent a relatively new class of materials formed by the selective etching of a single or polycrystalline substrate. Although porous silicon has received considerable attention due to its novel optical properties1, porous layers can be formed in other semiconductors such as GaAs and GaP. These materials are characterised by very high surface area and by electrical, optical and chemical properties that may differ considerably from bulk. The properties depend on the pore morphology, which can be controlled by adjusting the processing conditions and the dopant concentration. A number of novel structures can be fabricated using selective etching. For example, self-supporting membranes can be made by growing pores through a wafer, films with modulated pore structure can be fabricated by varying the applied potential during growth, composite structures can be prepared by depositing a second phase into the pores and silicon-on-insulator structures can be formed by oxidising a buried porous layer. In all these applications the ability to grow nanostructures controllably is critical.

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