Zn(NO_3)_2改性多孔碳的制备及其吸附液蜡油中芳烃的研究

Preparation of Zn(NO_3)_2 Modified Porous Carbon and Its Adsorption of Aromatic Hydrocarbons in Liquid Wax Oil

为探讨Zn(NO_3)_2改性多孔碳的制备以及其对液蜡油中芳烃的吸附性能,以三聚氰胺为氮源,柠檬酸钙为碳源,硝酸锌为造孔剂,制备了多孔碳材料.利用氮气吸附/脱附、XRD、FT-IR、SEM、拉曼光谱等对产物的形貌和结构进行了表征,并探讨了多孔碳对液蜡油中芳烃的吸附行为.结果表明:硝酸锌改性的多孔碳材料具有更高的比表面积(827.5 m^2·g^(-1)),并较液蜡油中的芳烃具有更好的吸附性能(吸附量qe高达32.45 mg·g^(-1)),远高于商业活性碳、硅胶和10X分子筛.

In order to investigate the preparation of Zn（NO3）2 modified porous carbon and its adsorption on aromatic hydrocarbons in liquid wax oil,the porous carbon material was prepared by using melamine as nitrogen source,calcium citrate as carbon source and zinc nitrate as pore-forming agent.The morphology and structure of the carbon materials were characterized by N2 adsorption/desorption,XRD,FT-IR,SEM and Raman spectra.The adsorption behavior of aromatic hydrocarbon in the liquid wax was also investigated.The results showed that the zinc nitrate modified porous carbon possessed a higher specific surface area（827.5 m^2·g^-1） and better adsorption performance（adsorption capacity qeup to 32.45 mg·g^-1） than aromatic hydrocarbon in the liquid wax,which was much higher than commercial activated carbon,silica gel and 10 X molecular sieve.