摘要
通过脱合金与直接氧化相结合的方法,制备了贵金属Pd原位掺杂的纳米多孔TiO2光催化材料。采用多种分析手段对材料进行表征,并研究了其光催化降解有机染料的性能改善机理。结果表明:用Ti-Cu-Pd非晶态合金在65%浓硝酸溶液中进行反应分别可以获得原位Pd掺杂的纳米花簇结构的金红石相TiO2,此TiO2纳米花由不同取向的TiO2纳米棒分支组成,单根TiO2纳米棒分支是由更加细小纳米棒组成的,这些细小的纳米棒沿[001]晶向生长。原始合金中不同Pd的含量对于产物中Pd的掺杂量影响并不显著,但是却会影响产物中TiO2晶粒的尺寸:随着Pd含量增加,TiO2晶粒变小。原位Pd掺杂的纳米TiO2具有更高的光催化活性。
TiO2 nanomaterials were prepared with in situ doped Pd by chemical dealloying Ti-Cu-Pd amorphous alloys. The TiO2 nanomaterials were characterized using SEM,TEM,XRD and EDS. The photocatalytic property was examined by degrading the organic dye RhB. The results showed that the TiO2 nanomaterial was composed of rutile phase. The TiO2 nanomaterials exhibitted nanoflower-like morphology. Each nanoflower comprised of some branch with length of several100 nm. Single branch was composed of lots of tiny nanorods with the mean diameter of5 ~15 nm along the direction which was perpendicular to(110) plane. These tiny nanorods grew along the [001]direction. The Pd content in the starting amorphous alloys had little influence on the doped Pd content in the TiO2 nanomaterials, but influenced the mean diameter of the TiO2 nanomaterials. With increasing Pd content in the starting amorphous alloys,the mean diameter of the TiO2 nanomaterials decreased. The TiO2 nanomaterials with in situ doped Pd exhibitted better photocatalytic property.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第S2期17-19,共3页
Materials Protection
基金
国家自然科学基金(50901051
51172159)资助
