利用光还原的方法制备一系列不同银含量的改性介孔二氧化钛的颗粒.采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、紫外一可见漫反射谱(DRS)和X射线能谱仪(EDX)等技术手段对制备的样品进行了表征.结果表明,银纳米粒子被牢牢固定在二氧化钛表面,并在银和二氧化钛界面形成肖特基势垒用以提高电子-空穴的分离.而从紫外可见漫反射光谱中看出,银二氧化钛样品与未改性的二氧化钛样品相比显示出更高的红移.以亚甲基蓝(MB)为光降解模型,银改性二氧化钛表现出较高的活性.
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