摘要
以氯化锌为活化剂,采用热裂解酵母法制备了多孔炭微球。用FE-SEM、XRD、TG-DTA表征了炭微球的物化结构,测试了炭微球的极性和吸附性能。FE-SEM结果表明多孔炭微球为椭球状,长度为(2.3±0.50)μm,宽度为(3.5±0.45)μm,分散度好。XRD结果表明多孔炭微球为无定形炭。热重分析监控了酵母的转变过程。FT-IR分析表明多孔炭微球的形成与表面化学官能团有关,其形成机理为炭化过程。极性测试表明炭微球表面存在大量非极性基团,这有利于炭微球在非极性溶液中的吸附。在对碱性和酸性染料的吸附中,多孔炭微球对酸性染料表现出了较高的吸附能力。
Porous carbon spheres were fabricated using a simple pyrolysis treatment of yeast with ZnClz. The field emission scanning electron microscopy, X-ray photoelectron spectroscopy and thermal gravimetry-differential thermal analysis were used to characterize the physical and chemical structure of the porous carbon spheres. The po- larity and adsorption properties of porous carbon microspheres were explored further. FE-SEM results indicated that the resulting samples maintain ellipsoid shape with the uniform size （length （2. 3±0. 50） μm, width （3. 5±0. 45） μm） and good dispersion. XRD pattern showed that the main crystal structure of porous carbon spheres was consisted of amorphous carbon. TG-DTA displayed the transition process of yeast. Fourier transform infrared spectroscopy （FT-IR） indicated that the formation of porous carbon microspheres was related to surface chemical functional groups. The possible formation mechanisms of porous carbon microspheres can he interpreted by the carbonization process. Polarity test showed that carbon mierosphere surface exist many non-polar groups, which can contribute to disperse in nonpolar solution for carbon mierospheres. In alkaline and acidic dyes adsorption, porous carbon microspheres showed a hi^her adsorption capacity of acidic dyes.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2013年第14期53-57,共5页
Materials Reports
基金
国家自然科学基金(21176031)
陕西省自然科学基金(2011JM2011)
大学生创新创业训练计划项目(201210710113)
关键词
酵母
热裂解
多孔炭微球
吸附
yeast, pyrolysis, porous carbon microspheres, adsorption
