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采用0.1 mol/L的KMnO4和0.1 mol/L的HNO3对化学气相沉积法合成的碳微球(CMSs)进行氧化后,在CMSs表面包覆MnO2层得到MnO2/CMSs复合材料,用H2C2O4洗涤MnO2/CMSs复合材料得到氧化CMSs。通过场发射扫描电子显微镜、高分辨透射电子显微镜和X射线衍射仪等对产物的形貌和结构进行表征,观察了氧化前后CMSs在水和乙醇中的分散性,并采用循环伏安法测试了MnO2/CMSs复合材料的电化学性能。结果表明:经KMnO4和HNO3处理的CMSs表面包覆有MnO2层,MnO2的负载率约为60%。MnO2/CMSs复合材料在中性溶液中有一定的电容性能;经H2C2O4洗涤后得到氧化CMSs,其表面引入了含氧官能团,使其在水和乙醇中均表现出良好的分散性。
After oxidized carbon microspheres (CMSs) synthesized by chemical vapor deposition using 0.1 mol / L KMnO4 and 0.1 mol / L HNO3, the MnO2 / CMSs composites were coated on the surface of CMSs and the MnO2 / CMSs composites oxidize CMSs. The morphology and structure of the products were characterized by field emission scanning electron microscopy, high resolution transmission electron microscopy and X-ray diffractometry. The dispersion of CMSs in water and ethanol before and after oxidation was observed and the cyclic voltammetry Electrochemical Performance of MnO2 / CMSs Composites. The results showed that the surface of CMSs treated with KMnO4 and HNO3 was covered with MnO2 layer, and the loading of MnO2 was about 60%. MnO2 / CMSs composites have some capacitive properties in neutral solution. Oxidized CMSs were obtained after washing with H2C2O4, and oxygen functional groups were introduced into the surface of MnO2 / CMSs composites to make them exhibit good dispersibility in water and ethanol.