摘要
以抗坏血酸和甲酸为还原剂,Cu(NO3)2为铜源制备了Cu2O微晶,并借助X射线衍射(XRD)和场发射扫描电子显微镜(FE-SEM)对样品的物相组成和形貌进行了表征,同时以罗丹明B为模型污染物,探讨了Cu2O微晶的形貌对光催化活性的影响。结果表明,在室温条件下以抗坏血酸为结构导向剂可获得八面体Cu2O微晶;而以甲酸为还原剂,160℃水热反应可获得Cu2O球形微晶。光催化降解实验表明,所得Cu2O微晶对罗丹名B有一定的光催化活性,且催化剂的形貌对其活性有很大影响,八面体Cu2O微晶(111)活性晶面外露较多,因而具有较高的光催化活性。
Cuprous oxide microcrystals were synthesized by two different methods using ascorbic acid and formic acid as reductant,and Cu（NO3）2 as the raw material.The product was characterized by XRD,FE-SEM and XPS techniques.The effect of reductant on the composition,morphology and photocatalytic activity of Cu2O microcrystals was also disscussed.The results indicated that octahedral Cu2O microcrystals were synthesized at room temperature by using ascorbic acid（AsA） as reductant and structure-directing agent.Using formic acid（FA）,spherical Cu2O microcrystals were obtained via hydrothermal process as well.The photocatalytic experiments showed octahedral Cu2O microcrystals have higher photocatalytic activity due to its higher proportion of exposed（111） surface.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2011年第5期1322-1327,共6页
Journal of Synthetic Crystals
基金
陕西省教育厅专项科研基金(2010JK921)资助项目
关键词
结构导向剂
氧化亚铜微晶
光催化活性
structure-directing agent
cuprous oxide microcrystal
photocatalytic activity
