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以AgNO_3,Sr(NO_3)_2和Na_2CO_3为前驱体,通过简单的沉淀法制备了棒状Ag_2CO_3/SrCO_3复合物。用X射线衍射,扫描电镜,氮吸附-脱附等温曲线表征了所制备的样品。通过在可见光下降解甲基橙来检测光催化活性。结果表明,随着Ag_2CO_3/SrCO_3摩尔比的减小,Ag_2CO_3/SrCO_3棒逐渐变细变短。棒状Ag_2CO_3/SrCO_3显示了极好的可见光光催化活性,与单一的Ag_2CO_3和SrCO_3比较,Ag_2CO_3/SrCO_3复合物的活性增强,摩尔比为1:5的Ag_2CO_3/SrCO_3棒活性最高。棒状Ag_2CO_3/SrCO_3的高活性是由于其高比表面积和它们之间形成了异质结协同作用的结果。
The Ag_2CO_3 / SrCO_3 rod-like composite was prepared by a simple precipitation method using AgNO_3, Sr (NO_3) _2 and Na_2CO_3 as precursors. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption-desorption isotherm. Photocatalytic activity is detected by degrading methyl orange in visible light. The results show that as the molar ratio of Ag_2CO_3 / SrCO_3 decreases, the rod of Ag_2CO_3 / SrCO_3 becomes narrower and shorter. The rod-shaped Ag 2 CO 3 / SrCO 3 showed excellent visible light photocatalytic activity. Compared with single Ag 2 CO 3 and SrCO 3, the activity of Ag 2 CO 3 / SrCO 3 complex was enhanced. The activity of Ag 2 CO 3 / SrCO 3 with the molar ratio of 1: 5 was the highest. The high activity of rod-like Ag_2CO_3 / SrCO_3 is the result of its high specific surface area and the synergy of the heterojunction formed between them.