CAJ | 학술논문

以热膨胀还原所制石墨烯为载体,采用超声辅助ˉ化学镀法制得石墨烯担载Ni纳米复合材料。利用X射线衍射仪和透射电子显微镜和能谱仪分析其微观结构及元素组成,研究其化学镀镍的反应机理。结果表明,随施镀时间的延长,Ni纳米颗粒以Pd为自催化活性中心,逐步附着在石墨烯表面上,并随Pd纳米颗粒的分布情况而富集在石墨烯边缘及皱褶区域；Sn纳米颗粒对化学镀镍贡献较小,以致化学镀镍后仍有部分残留。可见,在石墨烯表面进行化学镀镍时,Pd对Ni纳米颗粒的生长成核起定位和催化作用。
이열팽창환원소제석묵희위재체,채용초성보조ˉ화학도법제득석묵희담재Ni납미복합재료。이용X사선연사의화투사전자현미경화능보의분석기미관결구급원소조성,연구기화학도얼적반응궤리。결과표명,수시도시간적연장,Ni납미과립이Pd위자최화활성중심,축보부착재석묵희표면상,병수Pd납미과립적분포정황이부집재석묵희변연급추습구역；Sn납미과립대화학도얼공헌교소,이치화학도얼후잉유부분잔류。가견,재석묵희표면진행화학도얼시,Pd대Ni납미과립적생장성핵기정위화최화작용。
Thermally reduced graphene oxide was pretreated consecutively in solutions of SnCl2 in HCl and PdCl2 in HCl. The reˉ sulting material was then plated with nickel nanoparticles under sonication to prepare Ni/graphene nanocomposites. XRD, TEM and EDS were used to investigate the microstructure, elemental composition and the chemical plating mechanism. Results show that Sn nanoparticles are distributed evenly on the reduced graphene oxide. Pd nanoparticles are located preferentially at the edges of graˉ phene sheets and at wrinkles in them, and are also found on some Sn nanoparticles. Ni nanoparticles are formed on the Pd nanopartiˉ cles and act as active centers for Ni growththat results in covering most of the graphene sheet after plating.