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采用金属银修饰的碳纳米管制备了Ag-CNT/TiO2复合电极。利用X-射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),和能量分散性X射线分析(EDX)对所制的Ag-CNT/TiO2复合材料进行了表征。结果表明:二氧化钛颗粒和金属银颗粒在碳纳米管上均匀分布,所制电极具有较高的光电催化性能。其对亚甲基蓝的光电催化降解归因于一种协同效应,即二氧化钛的光降解、碳纳米管网络的电子辅助、金属银的增强和外加电势的作用。尤其是,经银修饰的复合电极增强了其对亚甲基蓝的光电降解,且随银含量的增加其光电催化效果增加。
Ag-CNT / TiO2 composite electrode was prepared by using metal silver modified carbon nanotubes. The prepared Ag-CNT / TiO2 composites were characterized by XRD, SEM, TEM and EDX. The results show that titanium dioxide particles and metallic silver particles are uniformly distributed on the carbon nanotubes, and the prepared electrodes have high photoelectrocatalytic performance. Its photoelectrocatalytic degradation of methylene blue is attributed to a synergistic effect, namely photodegradation of titanium dioxide, electron-assisted carbon nanotube network, enhancement of metallic silver and the effect of applied potential. In particular, the silver-modified composite electrode enhanced its photodegradation of methylene blue and its photo-electrocatalytic activity increased with increasing silver content.