摘要
采用简单的沉淀法在不同溶剂中合成了不同比例的复合材料,通过SEM、XRD和UV-Vis对合成的样品进行了表征.结果表明,在以水为溶剂时合成的样品形貌为棒状的Ag_2CO_3上附着均匀的颗粒状的Ag_2S,而在水和乙醇混合溶剂中合成的Ag_2CO_3-Ag_2S复合材料的形貌为棒状Ag_2CO_3上附着不规则颗粒状的Ag_2S,且以水和乙醇混合溶剂合成的Ag_2CO_3-Ag_2S复合材料对可见光下降解罗丹明B染料的催化性能强于Ag2CO3和Ag2S本身,并提出了可能的光催化机理.
The composites of Ag_2CO_3-Ag_2S with different proportions in different solvents were synthesized by simple precipitation method and were characterized by SEM,XRD and UV-Vis. The results showed that the morphology of the sample was better when water was used as solvent. The morphology of the Ag_2CO_3-Ag_2S composite prepared in the mixed solvent of water and ethanol was irregular granular Ag_2S attached on the rodlike Ag_2CO_3. The catalytic activity of Ag_2CO_3-Ag_2S composite prepared in water and ethanol for visible light degradation of Rhodamine B dyes is better than that of Ag_2CO_3 or Ag_2S catalyst. The possible photocatalytic mechanism is proposed.
引文
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