화학공학소재연구정보센터
학회 한국화학공학회
학술대회 2012년 가을 (10/24 ~ 10/26, 부산 BEXCO)
권호 18권 2호, p.2279
발표분야 재료
제목 Microwave treatment of carbon microspheres synthesized by hydrothermal carbonization of glucose  
초록 Natural coalification was imitated through microwave carbonization. The hydrothermal carbonization of glucose solutions was carried out at 210 °C for 15 min using microwave-assisted heating, resulting in spherical structures with a uniform size. The average diameter varies from 200 nm to 650 nm depending upon the concentration of the glucose solution.  The carbon content increased from less than 50% to over 90% by additional microwave irradiation for 1 min on dried spheres. Nitrogen-doping of carbon spheres was carried out by the addition of urea in the glucose solution. The nitrogen concentration of the spheres was controlled by varying the concentration of urea solution. Elemental analyses revealed that these spheres contain 35 % -45 % of carbon by atomic ratio and 5 % - 10 % of nitrogen by atomic ratio. When microwave was additionally irradiated for 1 min on the dried spheres, the carbon content increased to 60 % - 80 %, while the nitrogen content maintained 5 % - 10 %, and the oxygen content decreased to 0 % - 3 %.  
저자 정아름, 이건홍
소속 POSTECH
키워드 탄소
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