Research On The Synthesis Of Nanomaterials Based On Ordered Mesoporous Carbons

The synthesis of ordered mesoporous carbons (OMCs) using mesoporous silica as hard templates has received much attention in recent years. The pore diameter and pore wall thickness of ordered mesoporous carbons could be readily tailored by controlling the structure of the silica template and other details of the synthesis conditions. Ordered mesoporous carbons possess high specific surface area, uniform pore diameter, large pore volume, high mechanical stability, and especially electric conductivity. The preparation of nanomaterials from ordered mesoporous carbons and other metal or metal oxide nanoparticles has important implications to the development of catalysis, adsorption, and electronic applications.In this paper, ordered mesoporous carbon CMK-3 was prepared using mesoporous silica SBA-15 as hard templates and sucrose as carbon sources. Source could be completely incorporated into the channels of SBA-15 templates by a controlled two-step impregnation process. After carbonization of the carbon precursors at 900℃and dissolution of the templates by using HF solution at room temperature, ordered mesoporous carbon materials maintain the macroscopic morphology and ordered mesostructures of the SBA-15 templates. Silver nanoparticles within ordered mesoporous carbons were firstly prepared by a simple chemical method, which involved AgNO3 precursor impregnation, followed by thermal decomposition. A magnetic nanocomposite of ordered mesoporous carbon CMK-3 decorated with nickel nanoparticles was synthesized for the first time by a simple chemical method. Nickel nanoparticles were successfully prepared and uniformly supported on ordered mesoporous carbon CMK-3 by reduction route with CMK-3 as a reducing agent at 400℃. Furthermore, the application of Ni/CMK-3 as magnetically separable adsorbent for Vitamin B2 was also firstly examined in this study. Ordered mesporous carbon materials containing nickel oxide nanoparticles were also synthesized by carbonization of sucrose in the presence of nickel acetate inside SBA-15 mesoporous silica template. The structure characterization shows that nickel oxide nanoparticles are embedded inside the mesoporous carbon framework. The electrochemical testing of the as-made nanomaterials was also firstly measured and showed a large specific capacitance at room temperature. A new ordered mesoporous carbon-tin oxide nanocomposite was prepared for the first time by a simple and efficient sonochemical route at room temperature. The photoluminescence properties of the resulting nanomateirals were also firstly described. Ordered mesoporous carbon nanomaterials containing different nanoparticles may find suitable applications for the development of heterogeneous catalysts, adsorbents, chemical sensors, and advanced electrode materials.