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Prepearation of Carbon Nano/micro Materials from Halogenated Phenols

Author: LaiLinZuo
Tutor: WengJian
School: Xiamen University
Course: Biomedical Engineering
Keywords: Carbon nanomaterials Solvothermal Adsorption Functionalized 3D carbon-coated iron oxide
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 63
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Abstract

Carbon nanomaterials have a diversity of structures and a variety of excellent performance , and it shows in many fields of information, biology, energy , environmental protection and other great prospect . This thesis uses the solvothermal method, as raw materials in a polyhalogenated phenol , ferrocene as catalyst , in the presence of ammonia and amine compounds under the conditions successfully prepared by the one-step series of functions of the carbon nano - and micron material , a specific study the contents are as follows: 1, the use of the solvothermal method, as raw materials in a tribromophenol , and ferrocene as the catalyst , in the solvent system of toluene / ethanol (V: V = 4:1) , to react at 250 ° C conditions for 24h , successful prepared surface amino and hydroxy functionalized hollow carbon microspheres . Detailed study of carbon, nitrogen, and the reaction time, reaction temperature and the proportion of raw materials on the morphology , and to establish the corresponding reaction mechanisms ; aminated 2, using a positively charged carbon microspheres with acetic anhydride and succinic anhydride reaction , successfully prepared with negatively charged carboxyl and uncharged acetylated carbon microspheres and further study the impact of the carbon microspheres surface charge on the adsorption behavior of heavy metal ions and organic dyes . The results show that : the positively charged amine groups CFC microspheres with negatively charged heavy metal ions and organic dyes have a strong adsorption properties; negatively charged carboxy CFC microspheres positively charged heavy metal ions and organic dyes good adsorption performance ; uncharged acetyl dioxide microspheres the lower adsorption properties of heavy metal ions and organic dyes . Therefore, it is possible by changing the functional group of the surface of the carbon microspheres to control the adsorption properties of the carbon microspheres ; solvothermal method trichlorophenol as raw material , ferrocene as catalyst in the polyethylene glycol (PEG) , the solvent system , under the reaction conditions of 250 ℃ 30h, the successful preparation of carbon-coated iron oxide 3D ??nanomaterials . Detailed study of solvent , reaction time , and ammonia amount on the morphology , and to establish the corresponding reaction mechanisms . Conditions without the presence of reducing agents , the use of carbon-coated iron oxide 3D ??nanomaterials surface amino and hydroxy directly to restore H _{2 PtCl _{6 and HAuCl ₄, loaded with platinum and gold nanoparticles magnetic carbon composites were successfully prepared .}}

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