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采用混合溶剂法,通过改变钛酸四丁酯(TBOT)的量合成一系列不同比例的RF@TiO2核-壳结构,于氮气气氛600℃下煅烧得到meso-C@TiO2,进一步对所得产物表面进行贵金属沉积最终得到meso-C@TiO2@Ag复合光催化剂.通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、全自动比表面积及微孔物理吸附仪(BET)等对样品的成份、形貌和结构进行了表征.结果表明,成功制备了meso-C@TiO2@Ag三元介孔复合光催化材料,并且比表面积达到173.9 m2/g.在可见光照射下,以降解亚甲基蓝为模型,探讨了TBOT用量以及Ag负载量对产物光催化性能的影响.研究发现,当加入TBOT的量为0.3mL、AgNO3的投入量为10wt%时,所制备的meso-C@TiO2@Ag对亚甲基蓝的降解效果最佳,40 min内降解率接近100%,性能明显优于市售的纳米二氧化钛P25.

参考文献

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