CAJ | 학술논문

采用原位合成和化学共沉积相结合的方法制备了 Cr/Cu 复合粉体催化剂,并将其用于碳纳米管的制备。利用 XRD、SEM 和 TEM 手段分别对其晶相、微观结构形态进行表征。研究表明,Cr 含量对最终产物 CNTs 的结构有明显影响,10％(质量分数)Cr复合催化剂催化效果最好；不同煅烧温度下所得催化剂存在差异,其中700℃煅烧条件下可制备出结晶良好的 Cr/Cu 纳米复合催化剂。不同生长温度下所得复合粉体催化合成的碳纳米管品质形貌不一,其中800℃条件下可得到纯度高、表面光滑的碳纳米管。
채용원위합성화화학공침적상결합적방법제비료 Cr/Cu 복합분체최화제,병장기용우탄납미관적제비。이용 XRD、SEM 화 TEM 수단분별대기정상、미관결구형태진행표정。연구표명,Cr 함량대최종산물 CNTs 적결구유명현영향,10％(질량분수)Cr복합최화제최화효과최호；불동단소온도하소득최화제존재차이,기중700℃단소조건하가제비출결정량호적 Cr/Cu 납미복합최화제。불동생장온도하소득복합분체최화합성적탄납미관품질형모불일,기중800℃조건하가득도순도고、표면광활적탄납미관。
Cr/Cu composite powder catalyst was prepared via a combination of in situ synthesis and chemical co-deposition (CVD),and was applied to the synthesis of carbon nanotubes.Techniques of X-ray diffraction (XRD),as well as scanning electron microscopy (SEM)and transmission electron microscope (TEM)had been employed to characterize the crystal phase,micro structural morphologies of the as-synthesized materials,re-spectively.The results show that the content of Cr had a significant effect on the structure of CNTs,and the catalyst with 10wt% Cr was best.There are differences among materials calcined at different temperature, among which well-crystallized Cr/Cu nano-composite catalyst can be produced by calcined the precursor at 700℃.The quality and morphology of carbon nanotubes synthesized by different Cr/Cu composites calcined at vari-ous temperatures have great differences,and CNTs with high purity and smooth surface can be obtained when the catalyst at 800 ℃.