Synthesis Of Ordered Mesoporous Carbon-based Composites By A Controlled Approach And Study Of Their Performances

Porous materials, because of their characteristics such as high porosity, variouschannel composition, large specific surface area, have been widely applied andstudied in many fields such as biology, medicine, environmental protection,catalysis, energy storage and convention and so on. Ordered mesoporousmaterials are one kind of porous materials. Comparing with porous materials,the ordered channels, uniform and tunable pore sizes, abundant frameworkcomposition they have enable their extraordinary performances in those areas.This thesis studied the nanocomposites of ordered mesoporous carbon. Usinghierarchical co-assembly strategy to fabricate magnetic mesoporous carbonmaterials with excellent absorption and separation performances, consequentlyexpanded the fabrication strategy of magnetic carbon materials; by integratingwith graphene, we fabricated the hierarchical porous graphene-based orderedmesoporous carbon materials, successfully enhanced the performance of OMCsin specific capacity of supercapacitor.In the first chapter, we introduced the OMCs and their synthesis methods,process, and their applications in absorption and separation, electrochemistryand catalysis.In the second chapter, we introduced the medicine and the characterizationmeasurements needed in this thesis.In the third chapter, we reported for the first time a hierarchical co-assemblyapproach toward magnetic mesoporous graphitic composites (MMGCs) withdefined rhombododecahedral morphology and a uniform size of～5μm, inwhich amphiphilic triblock copolymer was used as the structuring agent, resololigomers as carbon precursors and magnetic Fe3O4nanoparticles as thefunctional components. Upon pyrolysis at900oC in Ar, the resultant MMGCs exhibit a narrow bimodal pore size distribution (2.4and12.0nm) and highsurface area (～230m2/g). Moreover, these composites exhibited highly stablemagnetic properties under strong acidic due to the protection effect of graphiticshells around Fe3O4nanopartilces. Additionally, the MMGCs show excellentadsorption capacities for Rhodamine B (Rh B) and the magnetically-separableproperties, facilitating their application as adsorbents and catalysts with an easyseparation process.In the fourth chapter, hierarchically porous carbon/graphene frameworks withordered mesostructures were successfully synthesized with graphene aerogels(GAs) as substrates, block copolymer F127as templates and resols(formaldehyde/phenol) as carbon sources via a controlled low-concentrationmonomicelle close-packing assembly approach and the following carbonization.It is proposed for the first time to obtain graphene-based ordered mesoporouscarbon with controllable mesoporous tropism (from orthogonal to parallel tographene substrate) by adjusting the initial concentration of spherical F127/resolmonomicelles in the presence of GAs. Benefiting from the integration of highconductivity, high surface area structure and three dimensional hierarchicalmeso-and macroporous structures, ordered mesoporous carbon@GAs(OMC@GAs) manifests outstanding specific capacitance (45F g-1), high ratecapability, and excellent cycling stability (7.4%loss after1000cycles@50mVs-1) when it is applied as electrode material in all-solid-state supercapacitors.In the last chapter, the experiments included in this thesis were summarized, andthe research trends were predicted.