贵金属负载氧化石墨烯二氧化钛光催化消除甲硫醇三甲胺性能探究

Research on the photocatalytic elimination of methyl mercaptan trimethylamine by noble metal-doped graphene oxide TiO_(2)

利用沉积法将Ag、Pt、Pd等3种贵金属负载GO/TiO_(2),利用X射线衍射、扫描电镜和X射线光电子能谱等对催化剂的结构、组成、形貌进行表征.将催化剂用于光催化动态和静态实验降解甲硫醇、三甲胺气体,考察不同贵金属的负载对催化效果的影响.结果表明,贵金属均匀沉积在GO/TiO_(2)上,减少了光生电子空穴对复合,与GO/TiO_(2)相比光催化效率得到显著提升.催化效果顺序为:Pd/GO/TiO_(2)>Pt/GO/TiO_(2)>Ag/GO/TiO_(2)>GO/TiO_(2).

GO/TiO_(2) was doped with three noble metals,including Ag,Pt and Pd.The crystal structure,composition,morphology of the catalyst were characterized by X-ray diffraction,scanning electron microscopy and X-ray photoelectron spectroscopy.Photocatalytic dynamic or static experiment toward degradation of methyl mercapatan and trimethylamine were carried out based on the acquired catalysts.The performance of the catalysts doped with different noble metals were investigated.It indicates that the noble metals are uniformly deposited on GO/TiO_(2).Herein,the recombination of photo-generated electrons and holes are dramatically reduced,and the photocatalytic efficiency of the acquired catalysts are significantly improved compared with GO/TiO_(2).The activity order of the catalysts was as follows:Pd/GO/TiO_(2)>Pt/GO/TiO_(2)>Ag/GO/TiO_(2)>GO/TiO_(2).