采用改进Hummers法合成了氧化石墨烯(GO),利用还原共沉淀法将金属Ni和Pd负载到还原氧化石墨烯(rGO)上,制备了分散均匀、大小均一的负载型双金属Ni1Pd3/rGO纳米催化剂,并通过透射电子显微镜、高分辨透射电子显微镜、X射线粉末衍射仪和电感耦合等离子原子发射光谱仪进行了表征。该催化剂用于脱卤反应时,转化率和选择性均大于99%,同时对卤代芳烃脱卤反应进行了底物拓展,说明该催化剂具有广泛的底物适应性;经过10次回收循环使用后,催化剂的转化率为97%,选择性仍大于99%,其结构和形貌没有发生明显改变,具有优异的催化活性、选择性和稳定性。
Graphene oxide (GO) was synthesized by the modified Hummers method,Ni and Pd were supported on reduced graphene oxide (rGO) by reduction of coprecipitation,the supported bimetallic Ni1Pd3/rGO nanocatalyst with dispersed evenly and size uniformity was prepared.Moreover,the structure of nanocatalyst was characterized by transmission electron microscopy (TEM),high resolution transmission electron microscopy (HRTEM),X-ray power diffraction (XRD) and inductively coupled plasma optical emission spectrometry (ICP-OES).The conversion and selectivity of the catalyst were more than 99% in hydehalogenation reaction.Meanwhile,the substrate scope of hydehalogenated aromatics reaction showed that the catalyst had a broad substrate scope adaptability.The catalyst was recovered and used for ten times,the conversion of the catalyst was 97%,and selectivity was still more than 99%,the structure and morphology did not change significantly,it exhibited excellent catalytic activity,selectivity and stability.
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基金资助
安徽省高校自然科学一般项目(KJHS2020B10);安徽省高校自然科学重点项目(KJ2020A0688);国家级大学生创新创业训练计划项目(202110375020,202110375043)
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