scholarly journals Synthesis of Carbon Nanocapsules and Nanotubes Using Fe-Doped Fullerene Nanowhiskers

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Tokushi Kizuka ◽  
Kun'ichi Miyazawa ◽  
Daisuke Matsuura
Keyword(s):  
Carbon Nanotubes ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Ferric Nitrate ◽  
Nitrate Nonahydrate ◽  
Carbon Nanocapsules

We synthesized iron-(Fe-)doped C60nanowhiskers (NWs) by applying the liquid-liquid interfacial precipitation method that employs a C60-saturated toluene solution and a solution of 2-propanol containing ferric nitrate nonahydrate (Fe(NO3)3⋅9H2O). Fe particles of 3–7 nm in diameter were precipitated in the NWs. By heating at 1173 K, the NWs were transformed into hollow and Fe3C-encapsulated carbon nanocapsules and carbon nanotubes.

scholarly journals Synthesis of Nickel-Encapsulated Carbon Nanocapsules and Cup-Stacked-Type Carbon Nanotubes via Nickel-Doped Fullerene Nanowhiskers

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Tokushi Kizuka ◽  
Kun'ichi Miyazawa ◽  
Akira Akagawa
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Heating Temperature ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Nitrate Hexahydrate ◽  
Ni Nanoparticles ◽  
One Dimensional ◽  
Carbon Nanocapsules

Nickel- (Ni) doped C60nanowhiskers (NWs) were synthesized by a liquid-liquid interfacial precipitation method using a C60-saturated toluene solution and isopropanol with Ni nitrate hexahydrate Ni(NO3)2·6H2O. By varying the heating temperature of Ni-doped C60NWs, two types of one-dimensional carbon nanostructures were produced. By heating the NWs at 973 and 1173 K, carbon nanocapsules (CNCs) that encapsulated Ni nanoparticles were produced. The Ni-encapsulated CNCs joined one dimensionally to form chain structures. Upon heating the NWs to 1373 K, cup-stacked-type carbon nanotubes were synthesized.

scholarly journals Synthesis of Cobalt-Encapsulated Carbon Nanocapsules Using Cobalt-Doped Fullerene Nanowhiskers

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Daisuke Matsuura ◽  
Kun'ichi Miyazawa ◽  
Tokushi Kizuka
Keyword(s):  
Heating Temperature ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Nitrate Hexahydrate ◽  
Packed Structure ◽  
Carbon Nanocapsules ◽  
Co Doped ◽  
Hexagonal Closed Packed

We synthesized cobalt- (Co-) doped C60 nanowhiskers (NWs) by applying a liquid-liquid interfacial precipitation method using a C60-saturated toluene solution and 2-propanol with Co nitrate hexahydrate (Co(NO3)3⋅6H2O). Heating the NWs at 873–1173 K produced carbon nanocapsules (CNCs) that encapsulated Co clusters with a hexagonal-closed-packed structure. After heating at 1273 K, the encapsulated Co clusters in CNCs were transformed into orthorhombic Co2C clusters. It was found that Co- and Co2C-encapsulated CNCs can be produced by varying heating temperature.

scholarly journals Non-cytotoxic carbon nanocapsules synthesized via one-pot filling and end-closing of multi-walled carbon nanotubes

Carbon ◽  
2019 ◽  
Vol 141 ◽  
pp. 782-793 ◽  
Author(s):  
Markus Martincic ◽  
Sandra Vranic ◽  
Elzbieta Pach ◽  
Stefania Sandoval ◽  
Belén Ballesteros ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
One Pot ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Nanocapsules ◽  
Walled Carbon Nanotubes

Removal of Pb(II) and Cu(II) from aqueous solution using multiwalled carbon nanotubes/iron oxide magnetic composites

2011 ◽  
Vol 63 (5) ◽  
pp. 917-923 ◽  
Author(s):  
Jun Hu ◽  
Donglin Zhao ◽  
Xiangke Wang
Keyword(s):  
Carbon Nanotubes ◽  
Iron Oxide ◽  
Multiwalled Carbon Nanotubes ◽  
Sorption Capacity ◽  
Photoelectron Spectroscopy ◽  
Metal Ion ◽  
Precipitation Method ◽  
Multiwalled Carbon ◽  
Magnetic Composites ◽  
X Ray

Multiwalled carbon nanotubes (MWCNTs)/iron oxide magnetic composites (named as MCs) were prepared by co-precipitation method, and were characterised by scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) in detail. The prepared MCs were employed as an adsorbent for the removal of Pb(II) and Cu(II) ions from wastewater in heavy metal ion pollution cleanup. The results demonstrated that the sorption of Pb(II) and Cu(II) ions was strongly dependent on pH and temperature. The experimental data were well described by Langmuir model, and the monolayer sorption capacity of MCs was found to vary from 10.02 to 31.25 mg/g for Pb(II) and from 3.11 to 8.92 mg/g for Cu(II) at temperature increasing from 293.15 to 353.15 K at pH 5.50. The sorption capacity of Pb(II) on MCs was higher than that of Cu(II), which was attributed to their ionic radius, hydration energies and hydrolysis of their hydroxides. The thermodynamic parameters (i.e., ΔH0, ΔS0 and ΔG0) were calculated from temperature dependent sorption isotherms, and the results indicated that the sorption of Pb(II) and Cu(II) ions on MCs were spontaneous and endothermic processes.

Study on the Characterization of Zinc Ferrite High-Temperature Coal Gas Desulfurization Agent

2010 ◽  
Vol 129-131 ◽  
pp. 1233-1237
Author(s):  
Hong Yan Xu ◽  
Mei Sheng Liang ◽  
Chun Hu Li
Keyword(s):  
Zinc Ferrite ◽  
Raw Materials ◽  
Particle Diameter ◽  
Textural Properties ◽  
Zinc Nitrate ◽  
Gas Absorption ◽  
Precipitation Method ◽  
Ferric Nitrate ◽  
The One ◽  
Co Precipitation

Using ferric nitrate, zinc nitrate, ammonia liquor and binder as main raw materials, five kinds of zinc ferrite sorbents were prepared by the co-precipitation method. The effects of the different binders on the structure and texture of zinc ferrite sorbents were investigated. The morphology, composite structure, pore properties, and mechanical strength were studied by using modern several physicochemical techniques such as powder X-ray diffraction (XRD), scanning electronic microscopy (SEM), strength tester and gas absorption meter. It is showed that spinel structure ZnFe2O4 is not affected by different binders，and its particle diameter is in micron leve1. The spinel structures are present in the sorbents that have been calcined at 750 0C.. The sorbent employed kaolinite as binder is the best one of the five types of sorbents for desulfurization, while the one employed diatomite is the worst.Different binders modify the textural properties, modifying consequently the sorbent reactivity. Furthermore, the reactivity and sulfur capacity of sorbents are increasing with an increase in the pore volume.

C60 Nanowhiskers Formed by the Liquid–liquid Interfacial Precipitation Method

2002 ◽  
Vol 17 (1) ◽  
pp. 83-88 ◽  
Author(s):  
K. Miyazawa ◽  
Y. Kuwasaki ◽  
A. Obayashi ◽  
M. Kuwabara
Keyword(s):  
Isopropyl Alcohol ◽  
Toluene Solution ◽  
Precipitation Method ◽  
Intermolecular Distance ◽  
Single Crystalline ◽  
Growth Axis

Fine needlelike crystals of C60 have been formed by a liquid–liquid interfacial precipitation method which uses an interface of the concentrated toluene solution of C60/isopropyl alcohol. The needlelike crystals of C60 with a diameter of submicrons (“C60 nanowhiskers”) were found to be single crystalline and composed of thin slabswith a thickness of about 10 nm. The intermolecular distance of the C60 nanowhiskerswas found to be shortened along the growth axis as compared with the pristine C60crystals, indicating a formation of strong bonding between C60 molecules. TheC60 nanowhiskers are assumed to be polymerized via the “2 + 2” cycloaddition inthe close-packed [110]c direction.

scholarly journals Biosafety of Non-Surface Modified Carbon Nanocapsules as a Potential Alternative to Carbon Nanotubes for Drug Delivery Purposes

PLoS ONE ◽  
2012 ◽  
Vol 7 (3) ◽  
pp. e32893 ◽  
Author(s):  
Alan C. L. Tang ◽  
Gan-Lin Hwang ◽  
Shih-Jung Tsai ◽  
Min-Yao Chang ◽  
Zack C. W. Tang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Potential Alternative ◽  
Carbon Nanocapsules ◽  
Surface Modified
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