采用简单的沉淀-光还原法合成了具有可见光催化降解有机物高活性的Ag@AgC1等离子共振光催化剂.采用扫描电镜、X射线能谱、透射电镜、XRD、紫外-可见漫反射光谱和XPS等手段对催化剂进行了表征.通过可见光下降解甲基橙进行光催化活性测试.结果显示,Ag@AgCl由于Ag纳米粒子的等离子共振效应而具有较强的吸收可见光性能.对光催化反应参数如投加量、光还原时间及pH值等进行了优化,在最优条件下,经过120 min可将83％的甲基橙降解.优异的光催化活性归因于银纳米颗粒的等离子共振效应.最后对光致电荷的分离机理进行了讨论.
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