中文摘要：

采用溶液燃烧法制备了一系列不同Ti掺杂量的LaNiO3光催化剂，研究了Ti掺杂量对其相结构、形貌和光催化性能的影响。采用XRD、SEM、EDS及光致发光光谱（PL）等对其进行了表征和分析。结果表明：采用溶液燃烧法可获得单一钙钛矿相的LaNiO3，随着Ti掺杂量的增加，晶面间距逐渐增大；Ti掺杂量对颗粒的形貌大小影响较小，颗粒近似球形，粒径分布均匀，约为80nm。可见光催化实验结果表明，当Ti掺杂量为3．0％（质量分数）时，所得催化剂的催化效果最好，适量的Ti掺杂可显著降低光生载流子的复合几率。

英文摘要：

A series of Ti-doped LaNiO3 photoeatalysts were successfully prepared by solution combustion synthesis （SCS）. The influence of Ti contents on the phase, morphology and photocatalytic properties were investigated. The synthesized powders were characterized by XRD, SEM, EDS and PL. The results show that Ti-doped LaNiOs with a single perovskite structure can be synthesized by SCS, and the crystal interplanar spacing increases with the increased Ti contents. All the obtained particles have a regular spherical shape with the average size of about 80 nm. The MO（methyl orange）degradation shows that the sample with 3% mass fraction of Ti content has the best photocatalytic efficiency. A proper Ti content can largely decrease the recombination of charge carriers.