Study on Preparation of Titanium Dioxide/Graphene Composites
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摘要: 以工业偏钛酸为原料,经过酸解、中和制得正钛酸,然后采用喷雾干燥法制备正钛酸粉末,将制得的石墨烯粉末与其混合均匀,通过煅烧得到了二氧化钛/石墨烯复合材料。利用电子扫描电镜和X射线衍射仪对其结构和形貌进行了表征,并且开展了二氧化钛/石墨烯复合材料在紫外光照射条件下光催化降解甲基橙试验,确定了二氧化钛/石墨烯复合材料制备的最佳工艺参数。在二氧化钛与石墨烯质量比为100∶1,煅烧温度500℃,煅烧时间1 h的条件下制得的二氧化钛/石墨烯复合材料在1 h内对甲基橙的光催化降解率高达88.33%。Abstract: In this paper, TiO2/graphene composites were prepared by combination of graphene powder with the calcinated TiO2 from orthotitanic acid, which was synthesized by acidolysis and neutralization of metatitanic acid followed by spray drying.The structure and morphology of the composites were characterized by SEM and XRD.And for UV-light photocatalytic degradation of methyl orange, the optimized preparation parameters of TiO2/graphene composites were obtained.With the optimized mass ratio of TiO2 to graphene（100∶1） for TiO2/graphene composites, calcination temperature of 500 ℃ and calcination time of 1 h, the photocatalytic degradation rate of methyl orange was as high as 88.33%.
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Key words:
- titanium dioxide /
- grapheme /
- calcination /
- photocatalytic performance
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