scholarly journals In situ K2S activated electrospun carbon nanofibers with hierarchical meso/microporous structures for supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (57) ◽  
pp. 33539-33548
Author(s):  
Hua Liu ◽  
Weiguo Song ◽  
Aihua Xing
Keyword(s):  
Surface Area ◽  
Carbon Nanofibers ◽  
Large Surface Area

K2S was found to be an excellent in situ activation agent for the fabrication of electrospun carbon nanofibers with large surface area (835.0 m2 g−1) and hierarchical meso/microporous structures.

Carbon Nanofibers Grown In Situ on Porous Glass

2017 ◽  
Vol 50 ◽  
pp. 1-17
Author(s):  
M. Alejandra Mazo ◽  
Javier Sanguino ◽  
Aitana Tamayo ◽  
Juan Rubio
Keyword(s):  
Surface Area ◽  
Carbon Nanofibers ◽  
Porous Glass ◽  
Glass Surface ◽  
Acid Leaching ◽  
Glassy Matrix ◽  
Broad Size Distribution ◽  
Different Temperatures ◽  
20 Nm

Carbon nanofibers (CNFs) were grown in situ on porous glass at different temperatures and times using a Ni acetate catalyst and CH4/N2 as a carbon source. The porous glass was obtained by acid leaching of phase separated borosilicate glass, which generates a broad size distribution of mesopores (≈20 nm). Subsequent impregnation with Ni acetate reduces the pore size to ≈ 4 nm but also creates new micropores, thus increasing the surface area. During thermal treatment the surface area decreases as temperature rises, mainly due to shrinkage of the glassy matrix; however new pores are created at ≈ 70 nm (mainly at 600 oC) associated to the generation of CNFs on the glass surface, indicating this temperature offers the best conditions. The CNFs grow inside and fill in the micro-mesopores in the porous glass. They do not grow at 500 oC as the Ni acetate is not transformed into metallic Ni. Ni deactivation occurs at temperatures over 700 oC, thus reducing the formation of CNFs. At 1000 oC the degradation of CH4 leads to a thickening of the CNFs. The thermal degradation of the CNFs occurs in two steps, the first (360-416oC) corresponding to CNFs grown on the glass surface and the second (518-649oC) to CNFs grown inside the glass pores. Treatment times over 2 h lead to the deactivation of Ni, pore shrinkage and hence lower CNF yields.

Preparation of tungsten carbide nanosheets with large surface area using an in situ DWCNT template

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47414-47420 ◽  
Author(s):  
Zi Ping Wu ◽  
Man Zhao ◽  
Jing Wei Hu ◽  
Wei Bo Zhang ◽  
Yan Hong Yin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Carbon Source ◽  
Tungsten Carbide ◽  
Surface Area ◽  
Large Surface Area ◽  
Liquid Carbon ◽  
Surface Areas ◽  
20 Nm

H2WO4 sheets approximately 50 nm long and 20 nm wide were prepared using a DWCNT template, and WC nanosheets with large surface areas were obtained when the H2WO4 was carbonized at a low temperature using a liquid carbon source.

scholarly journals The preparation of liquefied bio-stalk carbon nanofibers and their application in supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (40) ◽  
pp. 23324-23333 ◽  
Author(s):  
Xia Jiang ◽  
Chao Liu ◽  
Gaofeng Shi ◽  
Guoying Wang ◽  
Zhao Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Surface Area ◽  
Carbon Nanofibers ◽  
Structural Stability ◽  
Large Surface Area ◽  
Electrochemical Energy Storage ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrochemical Energy

Carbon nanofibers (CNFs) have been widely used in electrochemical energy storage devices because of their excellent conductivity, extremely large surface area and structural stability.

Graphene beaded carbon nanofibers/ZnO/polyaniline nanocomposites for high performance supercapacitor

2019 ◽  
Vol 33 (14n15) ◽  
pp. 1940016 ◽  
Author(s):  
Rounak R. Atram ◽  
Bhawana A. Manekar ◽  
Subhash B. Kondawar ◽  
Ramdas G. Atram ◽  
Pankaj Koinkar
Keyword(s):  
Surface Area ◽  
Carbon Nanofibers ◽  
Zno Nanoparticles ◽  
High Performance ◽  
In Situ Polymerization ◽  
High Surface ◽  
Electrochemical Characterizations ◽  
High Surface Area ◽  
Supercapacitor Application

Novel unique fabrication of ZnO nanoparticles decorated graphene beaded carbon nanofibers (G-CNF) encapsulated by polyaniline (PANI) nanocomposites through three steps by electrospinning, hydrothermal and in-situ polymerization is reported. As-synthesized G-CNF/ZnO/PANI and CNF/ZnO/PANI nanocomposites were comparatively studied by scanning electron microscopy and electrochemical characterizations for supercapacitor application. Electrochemical measurements of G-CNF/ZnO/PANI electrode revealed the maximum specific capacitance, discharge time, energy density and power density as compared to that of CNF/ZnO/PANI indicating the increase in surface area due to graphene incorporation in electrospinning of carbon nanofibers. The combination of electric double layer charge (EDLC) capacitance from high surface area of G-CNF and pseudo-capacitance from PANI and ZnO nanoparticles facilitates the synergistic effect of ternary components to enhance the electrochemical performance of G-CNF/ZnO/PANI nanocomposite.

Functional Two-Dimensional Black Phosphorus Nanostructures towards Next-Generation Devices

2021 ◽  
Author(s):  
Mengke Wang ◽  
Jun Zhu ◽  
You Zi ◽  
Zheng-Guang Wu ◽  
Haiguo Hu ◽  
...  
Keyword(s):  
Surface Area ◽  
Biomedical Applications ◽  
Black Phosphorus ◽  
Large Surface Area ◽  
Two Dimensional ◽  
Next Generation

In recent years, two-dimensional (2D) black phosphorus (BP) has been widely applied in many fields, such as (opto)electronics, transistors, catalysis and biomedical applications due to its large surface area, tunable...

Research on metallic chalcogen-functionalized monolayer-puckered V2CX2 (X = S, Se, and Te) as promising Li-ion battery anode materials

2021 ◽  
Author(s):  
Chunmei Tang ◽  
Xiaoxu Wang ◽  
Shengli Zhang
Keyword(s):  
Surface Area ◽  
Anode Materials ◽  
Large Surface Area ◽  
Two Dimensional ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Li Ion ◽  
Battery Anode

Two-dimensional MXene nanomaterials are promising anode materials for Li-ion batteries (LIBs) due to their excellent conductivity, large surface area, and high Li capability.

scholarly journals Strategic use of nanotechnology in drug targeting and its consequences on human health: A focused review

2019 ◽  
Vol 11 (1) ◽  
pp. 38-54 ◽  
Author(s):  
Anand Maurya ◽  
Anurag Kumar Singh ◽  
Gaurav Mishra ◽  
Komal Kumari ◽  
Arati Rai ◽  
...  
Keyword(s):  
Human Health ◽  
Surface Area ◽  
Medical Diagnosis ◽  
Drug Targeting ◽  
Pharmaceutical Market ◽  
Large Surface Area ◽  
Mass Ratio ◽  
Disease Therapy ◽  
Significant Interest ◽  
Medical Benefits

Since the development of first lipid-based nanocarrier system, about 15% of the present pharmaceutical market uses nanomedicines to achieve medical benefits. Nanotechnology is an advanced area to meliorate the delivery of compounds for improved medical diagnosis and curing disease. Nanomedicines are gaining significant interest due to the ultra small size and large surface area to mass ratio. In this review, we discuss the potential of nanotechnology in delivering of active moieties for the disease therapy including their toxicity evidences. This communication will help the formulation scientists in understanding and exploring the new aspects of nanotechnology in the field of nanomedicine.

Synthesis of functional hollow WS2 particles with large surface area for Near-Infrared (NIR) triggered drug delivery

2021 ◽  
Vol 875 ◽  
pp. 160034
Author(s):  
Na Liu ◽  
Fan Fan ◽  
Wei Xu ◽  
Hao Zhang ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Surface Area ◽  
Near Infrared ◽  
Large Surface Area
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