摘要:
The present invention relates to a process for preparing graphene by electrochemical exfoliation, which comprises: - providing a first electrode E1 and a second electrode E2, wherein at least the first electrode E1 comprises a carbon starting material having a layered structure; - bringing at least the first electrode E1 in contact with a liquid electrolyte, wherein the liquid electrolyte comprises - an ammonium cation, and - an inorganic sulphur-containing anion,
- applying an electric potential between the first electrode E1 and the second electrode E2 so as to exfoliate graphene from the carbon starting material.
摘要:
The present invention relates to a process for preparing graphene, comprising (i) providing in a chemical deposition chamber a substrate which has a surface S1, (ii) subjecting the substrate to a thermal pre-treatment while feeding at least one gaseous or supercritical oxidant into the chemical deposition chamber so as to bring the surface S1 into contact with the at least one gaseous or supercritical oxidant and obtain a pre-treated surface S2, (iii) preparing graphene on the pre-treated surface S2 by chemical deposition.
摘要:
The present invention relates to the use of an amine precursor of formula I
(X 1 -R 1 ) n -NH (3-n) (I)
or its ammonium salts for depositing a graphene film having a nitrogen content of from 0 to 65 % by weight on a substrate S1 by chemical vapor deposition (CVD), wherein R 1 is selected from (a) C 1 to C 10 alkanediyl, which may all optionally be interrupted by at least one of O, N H and NR 2 , (b) alkenediyl, which may all optionally be interrupted by at least one of O, NH and NR 2 , (c) alkynediyl, which may all optionally be interrupted by at least one of O, NH and NR 2 , (d) C 6 to C 20 aromatic divalent moiety, and (e) CO and CH 2 CO, X 1 is selected from H, OH, OR 2 , NH 2 , NHR 2 , or NR 2 2 , wherein two groups X 1 may together form a bivalent group X 2 being selected from a chemical bond, O, NH, or NR 2 , R 2 is selected from C 1 to C 10 alkyl and a C 6 to C 20 aromatic moiety which may optionally be substituted by one or more substituents X 1 , n is 1, 2, or 3.
摘要:
The present invention relates to nitrogen-doped graphene, a method for its preparation and its use for producing a catalyst, an electrode, a battery, a supercapacitor, preferably an all solid state supercapacitor, or an aerogel. The invention further relates to catalysts, electrodes, all solid state supercapacitors (ASSS) and aerogels comprising nitrogen-doped graphene.
摘要:
Compounds of the general formula (I) and compounds of the general formula (II), use of compounds (I) or (II) as visible or invisible marking materials, for coloring of materials, in laser welding of materials, for identification of bases, acids or pH changes, as dispersion agents, pigment additives for organic pigments and intermediate products for the manufacture of pigment additives, in thermal management or energy management, in the photovoltaic or optical data storage.
摘要:
Compounds of the general formula (I) and compounds of the general formula (II), use of compounds (I) or (II) as visible or invisible marking materials, for coloring of materials, in laser welding of materials, for identification of bases, acids or pH changes, as dispersion agents, pigment additives for organic pigments and intermediate products for the manufacture of pigment additives, in thermal management or energy management, in the photovoltaic or optical data storage.