首先采用化学气相沉积法,在氩气气氛下,以脱油沥青为原料制备了炭微球(CMSs);然后用不同浓度的KMnO4溶液对CMSs进行处理,使得CMSs表面被氧化并包覆一层MnO2;最后用草酸洗涤产物,除去MnO2.通过场发射扫描电镜对CMSs氧化前后的形貌进行观察,用X-射线衍射对产物进行结构表征,并考察了氧化前后的CMSs在水和乙醇中的分散性.结果表明:当用0.1mol/L的KMnO4氧化改性CMSs后,CMSs表面包覆了一层MnO2,形成MnO2/CMSs复合材料.经过量的草酸进行洗涤,得到的产物在水中分散效果很好,且在乙醇中也有一定分散性.氧化后CMSs的表面存在亲水活性位点,为CMSs的进一步功能修饰奠定了基础.
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