Abstract: A thermally conductive three-dimensional (3-D) graphene-polymer composite material, methods of making, and uses thereof are described. The thermally conductive three-dimensional (3-D) graphene-polymer composite material contains: (a) a porous 3-D graphene structure comprising a network of graphene layers that are attached to one another through a carbonized organic polymer bridging agent; and (b) a polymer material impregnated within the porous 3-D graphene structure, wherein the thermally conductive 3-D graphene-polymer composite material has a thermal conductivity of 10 W/m·K to 16 W/m·K.

Abstract: A multi-atomic layered material and methods of making and using the same are described. The material can include a first 2D non-carbon mono-element atomic layer, a second 2D non-carbon mono-element atomic layer, and intercalants positioned between the first and second atomic layers.

Abstract: Discussed herein is a porous carbon microtube (PCM)-based composite film electrode. The PCMs are fabricated using an activation process to form the porous surface of the microtubes that is made up of mesopores and micropores. The electrode is formed from a mixture of a 2-dimensional material such as graphene oxide (GO) and a plurality of PCM that self-assemble in response to mixing. The mixture is disposed on a membrane in a vacuum filtration apparatus to form a precursor film which is reduced to form the composite film electrode.

Abstract: A method of producing a carbon core-graphene shell material is disclosed. The method can include obtaining a dispersion comprising a grafted graphene oxide material and a polymerizable carbon material dispersed in a liquid medium, polymerizing the polymerizable carbon material in the dispersion to obtain a grafted graphene oxide coated polymerized carbon material dispersed in the liquid medium, evaporating the liquid medium from the dispersion, and heating the grafted graphene oxide coated polymerized carbon material to obtain the carbon core-graphene shell material.

Abstract: Disclosed is a method for making a material having supported micro- and/or nanostructures, the method includes (a) obtaining a substrate comprising a precursor material and an electrically conductive layer of micro- or nanostructures embedded into at least a portion of a first surface of the substrate, and (b) applying a voltage across the electrically conductive layer to heat the micro- or nanostructures, wherein the heat converts the precursor material into micro- and/or nanostructures.

Abstract: Porous carbon materials having a yolk-shell structure, methods of making and uses thereof are described. The porous carbon materials can have a sulfur-based yolk positioned within a hollow space of by a porous carbonized metal organic framework (MOF) shell.

Abstract: Polymeric materials, method of making the polymeric material, and uses thereof are disclosed. The polymeric material can include ordered arrangements of crystalline domains and ordered arrangements of amorphous domains.

Abstract: Multi-layered graphene materials and methods of making and using the same are described herein. A multi-layered graphene material can include at least two graphene layers that are attached to one another and have a plurality of yolk-shell type structures retained within a plurality of spaces between the graphene layers. Each yolk/shell type structure can include an elemental sulfur nano- or microstructure yolk and a carbon-containing porous shell. The yolk-shell structure has a volume sufficient to allow for volume expansion of the elemental sulfur nano or microstructure without deforming the multi-layered graphene structure.

Abstract: A porous carbon-based film, methods of making and uses thereof are described herein. The porous carbon-based film can include a porous carbon-based matrix including a plurality of yolk-shell type structures, and a plurality of graphene structures attached to the porous carbon-based matrix. Each yolk-shell type structure can include an elemental sulfur nanostructure positioned within a hollow space in the porous carbon-based matrix.

Abstract: A thermally conductive three-dimensional (3-D) graphene-polymer composite material, methods of making, and uses thereof are described. The thermally conductive three-dimensional (3-D) graphene-polymer composite material contains: (a) a porous 3-D graphene structure comprising a network of graphene layers that are attached to one another through a carbonized organic polymer bridging agent; and (b) a polymer material impregnated within the porous 3-D graphene structure, wherein the thermally conductive 3-D graphene-polymer composite material has a thermal conductivity of 10 W/m·K to 16 W/m·K.

Abstract: Methods for producing a carbon material-graphene composite are described. A method can include obtaining a dispersion comprising a graphene oxide material and a carbon material dispersed in a liquid medium, evaporating the liquid medium to form a carbon material-graphene composite precursor, and annealing the composite precursor at a temperature of 800° C. to 1200° C. in the presence of an inert gas to form the carbon material-graphene composite. The graphene oxide material can be grafted graphene oxide. Flexible carbon material-graphene composites are also described. The composites can have a polyacrylonitrile (PAN)-based activated carbon attached to a graphene layer, have a surface area of 1500 m2/g to 2250 m2/g, and a bimodal porous structure of micropores and mesopores.

Abstract: Porous materials having yolk-shell structures are described. A porous material can include an elemental sulfur nanostructure, a carbon-containing porous shell with an exterior surface and an interior surface that defines and encloses a hollow space within the interior of the shell, and a polysulfide trapping agent. The elemental sulfur nanostructure is comprised in the hollow space of the carbon-containing porous shell. Methods of making and use are also described.

Abstract: Controlled-release core/shell composite materials and methods of use are described. A composite material can include a hierarchical structured zeolite core having at least a bimodal pore structure with a first active agent loaded into pores of the core, and (b) a porous polymeric outer shell that substantially encompasses the zeolite core. The composite materials can be configured to controllably release the first active agent from the zeolite core and the porous polymeric shell in response to at least one stimulus.

Abstract: A controlled-release fertilizer composition, methods of making, and uses thereof are described. The controlled-release fertilizer composition includes a composite graphene-carbon nanotube material having a three-dimensional open-celled network of graphene and carbon nanotubes and a fertilizer impregnated in the three-dimensional open-celled network of graphene and carbon nanotubes.

Abstract: Methods of producing a porous material having a yolk-shell structure that includes a polysulfide trapping agent are described. The porous material can include an elemental sulfur nanostructure comprised in hollow space of the interior of the porous material. The method can include heat-treating a core-shell material that includes a polysulfide trapping agent/polymer core@carbon-containing shell to produce a polysulfide trapping agent@carbon-containing porous shell. The polysulfide trapping agent@carbon-containing porous shell can be impregnated with sulfur to form a sulfur@ polysulfide trapping agent@carbon-containing porous shell composite.

Abstract: A multi-atomic layered material and methods of making and using the same are described. The material can include a first 2D non-carbon mono-element atomic layer, a second 2D non-carbon mono-element atomic layer, and intercalants positioned between the first and second atomic layers.

Abstract: Colloidosome containing active agents and uses thereof are described. The colloidosome can include (a) a responsive micro- or nanostructured porous shell defined by a plurality of nanomaterials and interstices formed between the micro- or nanomaterials and (b) a core that is defined by the responsive micro- or nanostructured porous shell. The shell is loaded with an active agent capable of being released from the shell in response to a stimulus.

Abstract: A carbon nanotube material, methods of making and uses thereof are described. The carbon nanotube material can include a shell having a network of carbon nanotubes and a plurality of discrete void spaces contained within and surrounded by the network. The boundary of each void space is defined by the carbon nanotube network.

Abstract: Methods of making a carbon nanotube material and uses thereof are described. The methods can include obtaining a carbon-containing polymeric matrix shell having a single discrete void space defined by the carbon-containing polymeric matrix shell or having an encapsulated core and subjecting the carbon-containing polymeric matrix shell to a graphitization process to form a shell having a carbon nanotube network from the matrix. The resulting carbon nanotube material includes a shell having a network of carbon nanotubes and either (i) a single discrete void space defined by the network of carbon nanotubes or (ii) the encapsulated core surrounded by the network of carbon nanotubes.

Abstract: Methods to produce propylene oxide are described. One method can include providing a propene feedstream, an oxygen feed stream and, optionally, a hydrogen feed stream to a reaction zone, and maintaining, in a reaction zone during the reaction, at least 50 vol. % propene and 1 to 15 vol. % O2 by gradually introducing a feed stream that includes the O2 over the length of the catalytic bed or the length of the reaction zone and/or a feed stream that includes the H2 over the length of the catalytic bed or the length of the reaction zone.