CAJ | 학술논문

以氧化石墨烯, Co(NO3)2·6H2O 和 Fe(NO3)3·9H2O 为离子源利用水热法一步制备磁性石墨烯(CoFe2O4-hGO),用磺酸重氮盐将其重氮化制得磺酸磁性石墨烯固体酸,采用FT-IR、 XRD、 VSM和酸碱反滴定法测对其进行了表征。结果表明,链接石墨烯的CoFe2 O4为单相立方尖晶石结构,平均粒径为27 nm,饱和比磁化强度MS为29．7 A·m2/kg,其表面酸量为2．7 mmol/g。用乙酸与正己醇的酯化反应初步评估其催化性能：在90℃,乙酸与正丁醇摩尔比为1：1,催化剂用量为3wt%,反应时间为4 h的条件下,乙酸转化率为59．1%。
이양화석묵희, Co(NO3)2·6H2O 화 Fe(NO3)3·9H2O 위리자원이용수열법일보제비자성석묵희(CoFe2O4-hGO),용광산중담염장기중담화제득광산자성석묵희고체산,채용FT-IR、 XRD、 VSM화산감반적정법측대기진행료표정。결과표명,련접석묵희적CoFe2 O4위단상립방첨정석결구,평균립경위27 nm,포화비자화강도MS위29．7 A·m2/kg,기표면산량위2．7 mmol/g。용을산여정기순적지화반응초보평고기최화성능：재90℃,을산여정정순마이비위1：1,최화제용량위3wt%,반응시간위4 h적조건하,을산전화솔위59．1%。
A novel sulfonated magnetic graphene solid acid catalyst was prepared by combining the magnetic graphene which was in-situ obtained by hydrothermal method using graphene oxide, Co(NO3)2·6H2O and Fe(NO3)3· 9H2 O as ingredients and sulfonic acid azide salt via diazonium reaction. The character of solid acid catalyst was determined by FT-IR, XRD, VMS and Base-Acid titration method. The results showed that the total acid value was 2. 7 mmol/g, the CoFe2 O4 anchored to the graphene was the nanocrystal with cubic spinel structure, the size was 27 nm, and the saturation magnetization intensity ( Ms) was 29. 67 emu·g-1. The solid catalyst exhibited moderated activity for esterification of acetic acid, whose conversion reached 59. 1% at 90 ℃ for 4 h.