scholarly journals Synthesis of Carbon-Silica Nanomaterials by Carbonization of Cellulose Acetate and Polyisocyanate Copolymer

2016 ◽  
Vol 17 (2) ◽  
pp. 241-246
Author(s):  
V.V. Goncharuk ◽  
I.V. Dubrovin ◽  
L.V. Dubrovina ◽  
D.D. Kucheruk ◽  
O.V. Naboka ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Cellulose Acetate ◽  
Organic Compounds ◽  
Composite Structure ◽  
Nickel Chloride ◽  
Metallic Nickel ◽  
Mechanical Mixing ◽  
Silica Nanomaterials ◽  
Carbonaceous Nanomaterial ◽  
Nickel Crystals

Cellulose acetate and polyisocyanate copolymer synthesized by mechanical mixing of cellulose acetate, polyisocyanate and fumed silicon dioxide in the presence of nickel chloride was carbonized in silicon dioxide template. Copolymer and silicon dioxide template were formed simultaneously. Composite structure and composition was studied with SEM and EDS. SEM showed that porous carbonaceous nanomaterial was synthesized. Formed carbon is represented by coating on silicon dioxide, layered ribbon-like and fibrous structures in template pores with size from several nm (thickness) to several microns (length). Metallic nickel crystals up to 200 nm in size were fabricated in composite pores from Nickel chloride by reduction of   Ni2 with products of pyrolysis of organic compounds.

scholarly journals Carbon-Silica Composites with Cellulose Acetate, Polyisocyanate and Copper Chloride

2016 ◽  
Vol 17 (3) ◽  
pp. 407-411
Author(s):  
V.V. Goncharuk ◽  
I.V. Dubrovin ◽  
L.V. Dubrovina ◽  
D.D. Kucheruk ◽  
O.V. Naboka ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Cellulose Acetate ◽  
Organic Compounds ◽  
Composite Structure ◽  
Copper Chloride ◽  
Metallic Copper ◽  
Acetone Solution ◽  
Carbonaceous Nanomaterial

Cellulose acetate and polyisocyanate copolymer synthesized by simultaneous mixing of cellulose acetate and polyisocyanate with acetone solution of Copper chloride and fumed silicon dioxide was carbonized in a silicon dioxide template. The composite structure and composition was studied with SEM, EDS and XRD. It was shown that the porous carbonaceous nanomaterial was synthesized where formed carbon was represented by coating on silicon dioxide and consisted of graphite, graphene and amorphous nonstructured carbon. Crystals of metallic copper with the size up to few µm were formed from Copper chloride after reduction of Cu2+ with products of organic compounds pyrolisis.

A Novel Chemical Reduction Route towards the Synthesis of Nickel Nanoparticles at Room Temperature

2011 ◽  
Vol 694 ◽  
pp. 293-297
Author(s):  
Zhi Gang Wu
Keyword(s):  
Room Temperature ◽  
Nickel Nanoparticles ◽  
Chemical Reduction ◽  
Spherical Shape ◽  
Nickel Chloride ◽  
Metallic Nickel ◽  
Protective Agent ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid States

Pure metallic nickel nanoparticles, spherical shape have been successfully synthesized by the chemical reduction of nickel chloride with hydrazine at room temperature without any protective agent and inert gas protection. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were employed to characterize the nickel nanoparticles and of course, the magnetic properties were also measured. This synthetic method is proven to be simple and very facile. And it’s very interesting that the obtained nickel nanoparticle can be isolated in solid states and stabilized for several months in atmosphere.

scholarly journals Two Scenarios of Dechlorination of the Chlorinated Hydrocarbons over Nickel-Alumina Catalyst

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1446
Author(s):  
Ilya V. Mishakov ◽  
Aleksey A. Vedyagin ◽  
Yury I. Bauman ◽  
Arina R. Potylitsyna ◽  
Anastasiya S. Kadtsyna ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Nickel Chloride ◽  
Metallic Nickel ◽  
Catalytic Hydrodechlorination ◽  
Nickel Particles ◽  
Wide Range ◽  
Coprecipitation Technique ◽  
Flow Through ◽  
Microscopy Data ◽  
The Impact

Dechlorination processes attract great interest since they are involved in environmental protection and waste disposal technologies. In this paper, the process of gas-phase dechlorination of 1,2-dichloroethane, chloroform, and chlorobenzene over Ni/Al2O3 catalyst (90 wt% Ni) prepared by a coprecipitation technique was investigated. The reduction behavior of the oxide precursor NiO/Al2O3 was studied by thermogravimetric analysis in a hydrogen medium. A thermodynamic assessment of the conditions under which metallic nickel undergoes deactivation due to the formation of nickel chloride was performed. The dechlorination of chlorinated substrates was studied using a gravimetric flow-through system equipped with McBain balances in a wide range of temperatures (350–650 °C) and hydrogen concentrations (0–98 vol%). The impact of these parameters on selectivity towards the products of hydrodechlorination (C2H4, C2H6, and C6H6) and catalytic pyrolysis (carbon nanomaterial and CH4) was explored. The relationship between the mechanisms of the catalytic hydrodechlorination and the carbide cycle was discussed, and the specific reaction conditions for the implementation of both scenarios were revealed. According to the electron microscopy data, the carbonaceous products deposited on nickel particles during catalytic pyrolysis are represented by nanofibers with a disordered structure formed due to the peculiarity of the process including the side carbon methanation reaction.

High Rate Deposition of Silicon Dioxide Membrane by Excimer Laser Enhanced Projection Chemical Vapor Deposition from Organic Compounds at Low Temperature

1993 ◽  
Vol 32 (Part 1, No. 6B) ◽  
pp. 3109-3112 ◽  
Author(s):  
Seiichirou Tomoura ◽  
Kouji Takashima ◽  
Kazuyuki Minami ◽  
Masaki Esashi ◽  
Jun-ichi Nishizawa
Keyword(s):  
Chemical Vapor Deposition ◽  
Low Temperature ◽  
Silicon Dioxide ◽  
Organic Compounds ◽  
Excimer Laser ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
High Rate

Studies on distribution and reverse osmosis properties of cellulose acetate derivatives for organic compounds

1993 ◽  
Vol 85 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Haruhiko Ohya ◽  
Huang Jicai ◽  
Yoichi Negishi
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Organic Compounds

scholarly journals A study of catalytic actions at solid surfaces. II.—The transference of hydrogen from saturated to unsaturated organic compounds in the liquid state in presence of metallic nickel

1919 ◽  
Vol 96 (678) ◽  
pp. 322-329 ◽  
Keyword(s):  
Organic Compound ◽  
Organic Compounds ◽  
Liquid State ◽  
Intermediate Compound ◽  
Solid Surfaces ◽  
Metallic Nickel ◽  
Saturated Compound ◽  
Unstable Type ◽  
Unsaturated Organic Compound ◽  
Intermediate System

It has been shown in the first part of this series that hydrogenation in the liquid state at a surface of metallic nickel is to be considered as effected by the temporary union of the unsaturated organic compound and of hydrogen with the nickel, followed by a breakdown of this intermediate system into nickel and the saturated compound. This explanation is a development of the “intermediate compound” theory of catalysis first put forward by De la Rive and differs from the older view mainly in that it postulates an intermediate system of a very loose unstable type, similar to that produced between the natural enzymes, water (or oxygen), and the compounds attacked by the latter, during enzymic catalysis.

scholarly journals Removal of volatile organic compounds from air using activated carbon impregnated cellulose acetate electrospun mats

2018 ◽  
Vol 24 (4) ◽  
pp. 600-607 ◽  
Author(s):  
Kashyap Patil ◽  
Seonju Jeong ◽  
Hankwon Lim ◽  
Hun-Soo Byun ◽  
Sangil Han
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Cellulose Acetate ◽  
Organic Compounds ◽  
Volatile Organic
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