Self‐propagating high‐temperature fast reduction of magnesium oxalate to novel nanocarbons

Abstract

Phone: þ48 22 55 26 416, Fax: þ48 22 822 59 96Combustion synthesis is known as a cost-effective technique to produce many novel ceramic nanomaterials such as nitrides, carbides, and intermetallic compounds. Herein, we report an extremely fast chemical transformation of magnesium-magnesium oxalate (Mg/MgC 2 O 4 ) mixtures into solid products containing different nanocarbons and MgO. Despite a wide range of molar ratios of reactants all combustions, carried out in Ar at 1 MPa, were successful. The solid products were chemically purified (leaching of unreacted Mg and MgO) and characterized by XRD, SEM/EDX, TEM, DSC, and Raman spectroscopy. The residue contained mostly layered (circa several nm thick) carbon petal-like nanostructures and carbon-coated MgO.

Combustion synthesis of C/MgAl2O4 composite powders using magnesium oxalate as carbon source

“…It can be seen from Figure that the Raman spectrum of sample C‐3 displays three distinct bands at 1354 cm −1 (D band), 1581 cm −1 (G band), and 2691 cm −1 (G’ band). The D band reveals lattice distortions and defects of carbon . The G band corresponds to the first‐order scattering of the E 2 g vibration mode .…”

Graphene‐Like Carbon Nanostructures From Combustion Synthesis

“…We showed earlier that SiC nanowires can be easily and autothermally formed in the Si/PTFE system . Carbon nanomaterials, including graphene‐related ones, were obtained via Mg and Si reduction of appropriate oxidants: CO x , C x N y H z , GO and CF x , C 2 H 2 O 4 , MgC 2 O 4 , and CaC 2 O 4 . Natural carbon‐bearing minerals (dolomite, limestone, siderite) can also be CS processed .…”

“…[8] Carbon nanomaterials, including graphene-related ones, were obtained via Mg and Si reduction of appropriate oxidants: CO x , [9] C x N y H z , [10] GO and CF x , [11,12] C 2 H 2 O 4 , [13] MgC 2 O 4 , and CaC 2 O 4 . [14,15] Natural carbon-bearing minerals (dolomite, limestone, siderite) can also be CS processed. [16] Moreover, the aim of this study is to present the versatility of the SHS process that enables design of the desired structures.…”

Studies on Carbon Materials Produced from Salts with Anions Containing Carbon Atoms for Carbon Paste Electrode

“…The physicochemical properties of these carbons, crystallinity, porosity, adsorption capacity, electrochemical behavior, surface chemistry, varied according to the kind of organic precursor used. Recently, metallothermic reduction of oxalic acid [ 8 ], magnesium oxalate [ 9 ] or ammonium oxalate (acetate) [ 10 ] was utilized with magnesium for preparing carbon materials. The properties of the obtained carbons were characterized in some detail, generally apart from the porous structure.…”

“…Only in one study [ 10 ], the adsorption of 4-chlorophenol was investigated. All products of the magnesiothermic precess [ 8 , 9 , 10 ] were found to contain largely the turbostratic carbon forming a petal-like graphene material.…”