CAJ | 학술논문

以羧甲基纤维素( CMC)为原料,通过水热炭化-CO2活化制备微米级球形活性炭。研究了水热炭化温度、时间和CMC用量对前驱体炭球的形貌、粒径和分散性的影响,分析了活化温度、时间对球形活性炭形貌和孔结构的影响。通过扫描电子显微镜( SEM)、红外光谱( FT-IR)和光电子能谱( XPS)对前驱体炭球的形貌、表面官能团进行了表征分析,并用低温液氮吸附分析了球形活性炭的孔径结构。结果表明,前驱体炭球的含氧官能团以—COOR和—OH为主,在温度为200℃,CMC用量为1.5 g,40 mL H2 O,反应时间为10 h,可成功制备出形貌规则,粒径均一,分散性良好的微米级炭球。前驱体炭球经在850℃下经CO2活化2 h可制备出球形结构完整的微米级球形活性炭,比表面积高达1005.85 m2/g,平均孔径为2.78 nm。
이최갑기섬유소( CMC)위원료,통과수열탄화-CO2활화제비미미급구형활성탄。연구료수열탄화온도、시간화CMC용량대전구체탄구적형모、립경화분산성적영향,분석료활화온도、시간대구형활성탄형모화공결구적영향。통과소묘전자현미경( SEM)、홍외광보( FT-IR)화광전자능보( XPS)대전구체탄구적형모、표면관능단진행료표정분석,병용저온액담흡부분석료구형활성탄적공경결구。결과표명,전구체탄구적함양관능단이—COOR화—OH위주,재온도위200℃,CMC용량위1.5 g,40 mL H2 O,반응시간위10 h,가성공제비출형모규칙,립경균일,분산성량호적미미급탄구。전구체탄구경재850℃하경CO2활화2 h가제비출구형결구완정적미미급구형활성탄,비표면적고체1005.85 m2/g,평균공경위2.78 nm。
Micron-size spherical activated carbon ( SAC ) was prepared via hydrothermal carbonization-CO2 activation using carboxymethyl cellulose( CMC) as starting materials. The effects of reaction parameters including carbonization temperature, reaction time,CMC dose,activation temperature,and activation time on the morphology and porous structure of spherical carbon ( SC) were evaluated. Scanning electron microscopy( SEM) ,Fourier transform diffuse reflectance infrared spectroscopy( FT-IR) , X-ray photoelectron spectroscopy(XPS),and N2 (77K) adsorption-desorption isotherm were used for characterization of the synthesized products. The results indicated that the carbon sphere precursor, which mainly containing oxygenated functional groups of —COOR and —OH, were changed after hydrothermal carbonization. Regular carbon spheres with uniform sizes and good dispersity were prepared under the optimum conditions(200 ℃,10 h,1. 5 g CMC,and 40 mL H2O). After the activation of carbon sphere precursor under CO2 atmosphere at 850 ℃ for 2h, micron-size spherical activated carbon with surface area of 1 005. 85 m2/g and average pore diameter of 2. 78 nm was obtained.