A sustainable natural nanofibrous confinement strategy to obtain ultrafine Co3O4 nanocatalysts embedded in N-enriched carbon fibers for efficient biomass-derivative in situ hydrogenation

Nanoscale ◽  
2020 ◽  
Vol 12 (33) ◽  
pp. 17373-17384
Author(s):  
Shenghui Zhou ◽  
Haisong Qi
Keyword(s):  
Bacterial Cellulose ◽  
Carbon Fibers ◽  
Carbon Nanofiber

Ultrafine Co3O4 nanoparticle (ca. 1.57 nm) decorated N-enriched carbon nanofiber derived from bacterial cellulose was fabricated via a urea-assisted carbonation approach, followed by mild nitrate decomposition.

The Morphologies of Nano Carbon Growing In Situ by Catalytic Chemical Vapor Deposition

2012 ◽  
Vol 430-432 ◽  
pp. 1269-1272
Author(s):  
Xian Feng Xu ◽  
Yan Yan Hu ◽  
Peng Xiao
Keyword(s):  
Chemical Vapor Deposition ◽  
Electron Microscope ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Carbon Nanofiber ◽  
Chemical Vapor ◽  
Catalytic Chemical Vapor Deposition ◽  
Operation Conditions ◽  
Nano Carbon

In order to improve surface characteristics of carbon fibers, using nickel granules as catalysts, nano carbon with different morphologies was deposited in-situ on the surface of carbon fibers by the method of Chemical Vapor Deposition (CVD). The observations by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) indicated that keeping the excellent performance of plating nickels catalyst and a suitable deposition rate of Pyrogenation Carbon (PyC) are the key factors for getting Carbon Nanotube and Carbon Nanofiber (CNT/CNF). In this experiment, the optimum operation conditions are: plating time at 5min, deposition temperature at 1173K, deposition time at 2 hours, flow of C3H6, H2 and N2 at 30, 200 and 400ml/min respectively, deposition pressure at 700-1000Pa. Evolution rules of nano carbon are explained in growth mechanism of Catalytic Chemical Vapor Deposition (CCVD).

Magnetic carbon nanofiber composite adsorbent through green in-situ conversion of bacterial cellulose for highly efficient removal of bisphenol A

2021 ◽  
pp. 125184
Author(s):  
Piyatida Thaveemas ◽  
Laemthong Chuenchom ◽  
Sulawan Kaowphong ◽  
Supanna Techasakul ◽  
Patchareenart Saparpakorn ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Bacterial Cellulose ◽  
Carbon Nanofiber ◽  
Efficient Removal ◽  
Nanofiber Composite ◽  
Composite Adsorbent ◽  
Highly Efficient ◽  
Magnetic Carbon

scholarly journals Co9S8 activated N/S co-doped carbon tubes in situ grown on carbon nanofibers for efficient oxygen reduction

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34763-34769 ◽  
Author(s):  
Fang Wang ◽  
Ting Liu ◽  
Yaofang Guo ◽  
Wenzhen Li ◽  
Ji Qi ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Oxygen Reduction ◽  
Carbon Nanofibers ◽  
Carbon Nanofiber ◽  
Environment Friendly ◽  
Co Doped

Herein, we report a facile and environment-friendly route for the preparation of Co9S8 activated N/S co-doped carbon tubes (denoted as Co9S8@N/S–CT) in situ grown on a carbon nanofiber network derived from bacterial cellulose.

Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

2003 ◽  
Vol 774 ◽  
Author(s):  
Janice L. McKenzie ◽  
Michael C. Waid ◽  
Riyi Shi ◽  
Thomas J. Webster
Keyword(s):  
Carbon Fiber ◽  
Surface Energy ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Carbon Nanofiber ◽  
Fiber Composite ◽  
Scar Tissue ◽  
Pc 12 Cells ◽  
Low Surface Energy ◽  
Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

scholarly journals Nanoscale oxidation behavior of carbon fibers revealed with in situ gas cell STEM

2021 ◽  
Vol 199 ◽  
pp. 113820
Author(s):  
Thomas J. Cochell ◽  
Raymond R. Unocic ◽  
José Graña-Otero ◽  
Alexandre Martin
Keyword(s):  
Carbon Fibers ◽  
Oxidation Behavior ◽  
Gas Cell

Enhanced mechanical strength of SiC reticulated porous ceramics via addition of in-situ chopped carbon fibers

2021 ◽  
pp. 161638
Author(s):  
Ruoyu Chen ◽  
Xinxin Jin ◽  
Daqian Hei ◽  
Peng Lin ◽  
Feng Liu ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Carbon Fibers ◽  
Porous Ceramics

In Situ Transformed Carbon Fibers/Al2O3 Nanocomposites Using Cao–MgO–SiO2 Sintering Agent

2021 ◽  
Vol 21 (10) ◽  
pp. 5235-5240
Author(s):  
Hua-Hui Chen ◽  
Jing-Jing Cao ◽  
Hai-Ping Hong ◽  
Nan Zheng ◽  
Jie Ren ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Axial Direction ◽  
Diffraction Peak ◽  
Sintering Process ◽  
Interface Bonding ◽  
The Core ◽  
Matrix Nanocomposites ◽  
Pan Fibers ◽  
Properties Of Composites

In Situ transformed carbon fibers/Al2O3 ceramic matrix nanocomposites with Cao–MgO–SiO2 sintering agent were prepared by hot-pressed sintering technology in vacuum. In the sintering process, pre-oxidized polyacrylonitrile fibers (below named as pre-oxidized PAN fibers) were used as the precursors of In Situ transformed carbon fibers. The micro/nanostructure of composites and interface between In Situ transformed carbon fibers and matrix were investigated, as well as the properties of composites. The results showed that the composites could be sintered well at a relatively low temperature of 1650 °C. During the sintering, the precursors, pre-oxidized PAN fibers, were In Situ transformed into carbon fibers, and the In Situ transformed carbon fibers had the graphitelike structure along the fiber axial direction. The carbon atoms arrangement in the surface layer of the fiber was more orderly than the core. A typical diffraction peak of carbon fiber at 26°, which corresponded to the (002) crystal plane, was observed, and the inter-planar spacing was approximately 0.34 nm. The CaO–MgO–SiO2 sintering agent formed MgAl2O4 and CaAl2Si2O8 phases in the interface between In Situ transformed carbon fibers and matrix, therefore improving the interface bonding, and thereby modifying the mechanical properties of the composites.

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