Abstract: A preparation method of a graphene-based composite aerogel material for adsorbing heavy metal ions especially for a chelating agent/polymer/graphene composite aerogel material, includes: (1) preparing a chelating agent active solution; (2) preparing a GO/polymer mixed solution; (3) mixing the GO/polymer mixed solution with the chelating agent active solution to obtain the graphene-based composite aerogel material through a hydrothermal reaction. The polymer is used to enhance the mechanical strength of the aerogel and the chelating agent is used to improve the adsorption performance of the aerogel. The hydrothermal reaction is utilized to reduce graphene oxide to partially reduced graphene oxide, thereby forming a graphene-based aerogel. The composite aerogel has a high specific surface area and good mechanical strength. Moreover, active sites provided by the chelating agent and graphene further enhance the adsorption performance of the composite aerogel for metal ions.

Abstract: Provided is directionally-arranged graphene heat-conducting foam, directionally-arranged graphene heat-conducting film, preparation methods of the directionally-arranged graphene heat-conducting foam and the directionally-arranged graphene heat-conducting film, and an electronic product. For the preparation method of graphene heat-conducting foam, after part of the graphene oxide slurry is preliminarily directionally molded in freezing condition with an array grid with specific structure and tank, the array grid is separated from the part of the graphene oxide slurry, to obtain the first graphene oxide, then the other part of the graphene oxide slurry is injected to gaps and an upper surface of the first graphene oxide, then the graphene oxide slurry is frozen and dried, to obtain second graphene oxide, and finally, the carbonization and graphitization treatment is performed on the second graphene oxide, to obtain the directionally-arranged graphene heat-conducting foam.

Abstract: Provided is directionally-arranged graphene heat-conducting foam, directionally-arranged graphene heat-conducting film, preparation methods of the directionally-arranged graphene heat-conducting foam and the directionally-arranged graphene heat-conducting film, and an electronic product. For the preparation method of graphene heat-conducting foam, after part of the graphene oxide slurry is preliminarily directionally molded in freezing condition with an array grid with specific structure and tank, the array grid is separated from the part of the graphene oxide slurry, to obtain the first graphene oxide, then the other part of the graphene oxide slurry is injected to gaps and an upper surface of the first graphene oxide, then the graphene oxide slurry is frozen and dried, to obtain second graphene oxide, and finally, the carbonization and graphitization treatment is performed on the second graphene oxide, to obtain the directionally-arranged graphene heat-conducting foam.

Abstract: Provided are graphene nanoribbons with controlled zig-zag edge and cove edge configuration and methods for preparing such graphene nanoribbons. The nanoribbons are selected from the following formulae.

Abstract: The present invention relates to a segmented graphene nanoribbon, comprising at least two different graphene segments covalently linked to each other, each graphene segment having a monodisperse segment width, wherein the segment width of at least one of said graphene segments is 4 nm or less and to a method for preparing it by polymerizing at least one polycyclic aromatic monomer compound and/or at least one oligo phenylene aromatic hydrocarbon monomer compound to form at least one polymer and by at least partially cyclodehydrogenating the one or more polymer.

Abstract: The present invention relates to a graphene nanoribbon, comprising a repeating unit which comprises at least one modification, wherein the modification is selected from a heteroatomic substitution, a vacancy, a sp3 hybridization, a Stone-Wales defect, an inverse Stone-Wales defect, a hexagonal sp2 hybridized carbon network ring size modification, and any combination thereof.

Abstract: Provided are graphene nanoribbons with controlled zig-zag edge and cove edge configuration and methods for preparing such graphene nanoribbons. The nanoribbons are selected from the following formulae.

Abstract: The present invention relates to a process for preparing a graphene nanoribbon, which comprises: (a) providing at least one aromatic monomer compound which is selected from at least one polycyclic aromatic monomer compound, at least one oligo phenylene aromatic monomer compound, or combinations thereof, on a solid substrate, (b) polymerization of the aromatic monomer compound so as to form at least one polymer on the surface of the solid substrate, (c) at least partially cyclodehydrogenating the one or more polymers of step (b), wherein at least step (b) is carried out at a total pressure p(total) of at least 1×10?9 mbar; and a partial oxygen pressure p(O2) and partial water pressure p(H2O) which satisfy the following relation: p(O2)×p(H20)<3×10?14 mbar2.

Abstract: The invention relates to oligophenylene monomers of general formula I, wherein R1 is H, halogene, —OH, —NH2, —CN, —NO2, or a linear or branched, saturated or un-saturated C1-C40 hydrocarbon residue, which can be substituted 1- to 5-fold with halogene (F, Cl, Br, I), —OH, —NH2, —CN and/or —NO2, and wherein one or more CH2-groups can be replaced by —O—, —S—, —C(O)O—, —O—C(O)—, —C(O)—, —NH— or —NR3—, wherein R3 is an optionally substituted C1-C40 hydrocarbon residue, or an optionally substituted aryl, al-kylaryl, alkoxyaryl, alkanoyl or aroyl residue; R2a and R2b are H, or optionally one or more of the pairs of adjacent R2a/R2b is joined to form a single bond in a six-membered carbocycle; m is an integer of from 0 to 3; n is 0 or 1; and X is halogene or trifluoromethylsulfonate, and Y is II; or X is II, and Y is halogene or trifluoromethylsulfonate.

Abstract: The present invention relates to a process for preparing a graphene nanoribbon, which comprises: (a) providing at least one aromatic monomer compound which is selected from at least one polycyclic aromatic monomer compound, at least one oligo phenylene aromatic monomer compound, or combinations thereof, on a solid substrate, (b) polymerization of the aromatic monomer compound so as to form at least one polymer on the surface of the solid substrate, (c) at least partially cyclodehydrogenating the one or more polymers of step (b), wherein at least step (b) is carried out at a total pressure p(total) of at least 1×10?9 mbar; and a partial oxygen pressure p(O2) and partial water pressure p(H2O) which satisfy the following relation: p(O2)×p(H20)<3×10?14 mbar2.

Abstract: The present invention relates to a graphene nanoribbon, comprising a repeating unit which comprises at least one modification, wherein the modification is selected from a heteroatomic substitution, a vacancy, a sp3 hybridization, a Stone-Wales defect, an inverse Stone-Wales defect, a hexagonal sp2 hybridized carbon network ring size modification, and any combination thereof.

Abstract: The present invention relates to a segmented graphene nanoribbon, comprising at least two different graphene segments covalently linked to each other, each graphene segment having a monodisperse segment width, wherein the segment width of at least one of said graphene segments is 4 nm or less and to a method for preparing it by polymerizing at least one polycyclic aromatic monomer compound and/or at least one oligo phenylene aromatic hydrocarbon monomer compound to form at least one polymer and by at least partially cyclodehydrogenating the one or more polymer.