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石墨烯基钴镍合金复合材料的制备及催化性能研究 被引量:1

Preparation and Catalytic Property of Graphene Based Cobalt@Nickel Alloy Composite
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摘要 本文采用改进的Hummer法制备氧化石墨烯(GO),通过水热法于温和反应条件下制备了石墨烯基钴镍合金复合材料(GO/Co@Ni)。运用X射线衍射、扫描电镜以及透射电镜对该复合材料进行了表征。研究了该复合材料在对硝基苯酚还原反应中的催化作用。结果表明,在该反应体系中添加GO/Co@Ni与未添加催化剂,以及只添加石墨烯材料或钴镍合金相比,反应速率明显加快。进一步研究表明,当该复合材料中钴、镍的配比为2∶1时,催化效率最高。另外该复合材料中因为添加了钴和镍磁性材料,有利于催化剂的回收再利用。对最佳钴镍比的复合材料进行了4次催化实验,其催化效率仍维持在90%以上,表明该复合材料在实际应用时的循环性能较好,有望发展作为新型的催化材料。 Graphene oxide(GO) was prepared by the modified Hummer’s method, and then used to fabricate graphene based cobalt@nickel alloy composite material(GO/Co@Ni) through a simple hydrothermal method under mild reaction conditions.The phase and morphology of these materials were characterized using X-ray powder diffraction, scanning electron microscope and transmission electron microscopy.Because of synergistic effect of graphene with high specific surface area, strong electrical conductivity oxide and cobalt nickel alloy containing active metal locus, the GO/Co@Ni composite exhibited high catalytic effect in the process of reduction of p-nitrophenol to p-aminophenol.Moreover, further research showed that the catalytic efficiency of GO/Co@Ni composite had the best catalytic performance while the mole ratio of cobalt and nickel in composite material was 2∶1.Utilizing the strong magnetism of Co@Ni material, it was easy to recycle and reuse as catalysts, and the catalytic efficiency of composite remained above 90% by means of four continuous experiments, indicating that it is expected to be developed as a new catalytic material.
作者 吴芳辉 李晓柠 程源晟 王淼 董天涯 周东 WU Fang-hui;LI Xiao-ning;CHENG Yuan-sheng;WANG Miao;DONG Tian-ya;ZHOU Dong(School of Chemistry and Chemical Engineering,Anhui University of Technology ,Ma’anshan 243002)
出处 《分析科学学报》 CAS CSCD 北大核心 2019年第5期567-571,共5页 Journal of Analytical Science
基金 国家自然科学基金(No.21771003) 安徽省自然科学基金(No.1808085MB36) 安徽省教育厅自然科学重点基金(No.KJ2015A024) 安徽省大学生创新创业训练计划(No.201810360200)
关键词 钴镍合金 石墨烯纳米材料 复合材料 催化 Cobalt-nickel alloy Graphene nanomaterials Composite Catalysis
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