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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。
The Cu2O crystallites were prepared by using ascorbic acid and formic acid as reductants and Cu (NO3) 2 as the copper source. The phase composition and morphology of the samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy , And Rhodamine B as model pollutant. The effects of morphology of Cu2O microcrystal on photocatalytic activity were discussed. The results show that octahedral Cu2O crystallites can be obtained by using ascorbic acid as the structure-directing agent at room temperature, while Cu2O spherical microcrystals can be obtained by the hydrothermal reaction at 160 ℃ with formic acid as reducing agent. Photocatalytic degradation experiments show that the obtained Cu2O microcrystal has a certain photocatalytic activity on Rhodamine B, and the morphology of the catalyst has a great influence on the activity, and the octahedral Cu2O microcrystal (111) active crystal surface is exposed more, thus With high photocatalytic activity.