Synthesis Of Non-layered Mesoporous Co₃O₄ By Using Multi-carboxyl Anion Surfactant As Template, Synthesis Of The Mesoporous Nanocrystalline Co₃O₄ Under Moderate Conditions And Synthesis Of Mesoporous Carbon By U

Recently, non-siliceous mesoporous materials have been receiving extensive attention duo to great prospects in some areas. For example, mesoporous Co3O4 and mesoporous carbon materials.Cobalt oxide, as a p-type semiconductor with spinel structure, has been found to be a promising material in gas-sensing, solar engineering, and rechargeable lithium batteries. Particularly, since nano-sized cobalt oxide was firstly used as negative-electrode material for lithium-ion battery by Tarascon and coworker in 2000, a variety of tricobalt tetraoxide nanostructures have been synthesized.Nanoporous carbon materials possess excellent chemical, physical and thermal stability, and are very interesting materials for energy conversion and storage. Especially, mesoporous carbon (MC) attracts broad attention as electrode material due to high specific surface area, abundant mesoporous structure and appropriately porous size for quick mass transfer and ion diffusion.This paper focuses on the method of the synthesis of non-layered mesoporous Co3O4 mesoporous carbon. The main content and results are presented below.1. We successfully synthesized n-octadecyl-N-iminodiacetic acid (SHIDA) and n-lauroyl-N-(dicarboxymethyl amino ethyl)-N-(carboxymethyl amino ethyl) amine (TCA) and n-lauroyl-N,N-di-(dicarboxymethyl amino ethyl) amine (FCA). We successfully synthesized the mesoporous Co3O4 via specially designed surfactant and also studied the effect of surfactant carboxyl on the synthesis of mesoporous Co3O4 by using lauric acid, SHIDA and TCA as template, separately; and found that mesoporous Co3O4 with non-layered structure prepared by using TCA as template, which was dramatically different from that synthesized by the other two surfactants. This is agreed with the theory raised by Israelachvili. Besides, we preliminarily studied the electrochemical performance of the mesoporous Co3O4, which displayed the material has potential application as anode material for Li ion secondary battery.2. In this study, we developed an economically reasonable method, via which mesoporous nanocrystalline Co3O4 can be synthesized conveniently under moderate conditions. In addition, we studied the effect of the pH value of solution on the material structure.3. We report a kind of simple and efficient approach to synthesize mesoporous carbon by using urea-formaldehyde resin as a polymer precursor, and amphiphilic block copolymers of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) is used as structure-directing agent. Then, using evaporation-induced self-assembly (EISA) strategy, the mesoporous carbon can be introduced through one-step process. Besides, we study the effect of the calcination temperature on the structure of the product.