摘要
以325目鳞片石墨为原料,采用改进Hummers法合成氧化石墨(GO),再以尿素为氮源,通过水热法制备了氮掺杂还原氧化石墨烯(N-rGO)载体,然后通过浸渍法制备出负载型Ni/N-rGO催化剂。通过N2吸附-脱附、XRD、SEM、H_(2)-TPR等测试方法对所制备的催化剂进行表征分析。以苯酚选择性加氢制备环己酮为反应体系,在反应温度150℃、压力0.4 MPa、时间2.0 h的条件下,对比了N-rGO、还原氧化石墨烯(rGO)、活性炭(AC)等载体负载Ni催化剂的加氢性能。结果表明,N-rGO载体不但具有较大的比表面积和适宜的孔结构,而且N-rGO和金属镍之间有较好的协同作用,Ni/NrGO催化剂展现出优异的催化活性和选择性。
Using 325 mesh flake graphite as raw material,graphite oxide(GO)was synthesized by improved Hummers method.Nitrogen-doped reduced graphene oxide(N-rGO)carrier was prepared by hydrothermal method using urea as nitrogen source,and then supported Ni/N-rGO catalyst was prepared by impregnation method.The prepared catalysts were characterized and analyzed by N2 adsorption-desorption,XRD,SEM,H_(2)-TPR and other methods.The hydrogenation performance of Ni catalysts supported by N-rGO,reduced graphene oxide(rGO)and activated carbon(AC)were compared under the reaction conditions of 150℃,0.4 MPa and 2.0 h with selective hydrogenation of phenol to cyclohexanone as probe reaction.The results show that the N-rGO support not only has a large specific surface area and suitable pore structure,but also has good synergistic effect with nickel metal,and the Ni/N-rGO catalyst thus shows excellent catalytic activity and selectivity.
作者
徐海升
黄国强
薛媚月
郜鹏程
XU Hai-sheng;HUANG Guo-qiang;XUE Mei-yue;GAO Peng-cheng(College of Chemistry and Chemical Engineering,Xi'an Shiyou University,Xi'an 710065,China)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2021年第7期1042-1048,共7页
Journal of Fuel Chemistry and Technology
基金
西安石油大学研究生创新与实践能力培养立项项目(YCS20221009,YCS20212102)资助。
关键词
N-rGO载体
催化加氢
苯酚
环己酮
反应机理
N-rGO carrier
catalytic hydrogenation
phenol
cyclohexanone
reaction mechanism
