中文摘要：

采用溶剂热法在温和的条件下制备粒径在200-300 nm、结晶较好的NaTaO3纳米晶体。并借助X射线衍射、发射-扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）等手段分别对其晶相、微观形貌进行表征。结果表明：水热体系140℃即可得到纯的NaTaO3晶体,升高反应温度有利于钙钛矿结构纳米NaTaO3晶体的生长;乙醇体系不能得到NaTaO3晶体,而乙醇/水混合体系在120℃可得到纯NaTaO3。用5 mg.L^-1藏红T溶液作为降解液进行光催化降解实验,结果表明所得样品有较高的催化活性。

英文摘要：

Fully-crystallized NaTaO3 particles with a size distribution from 200 to 300 nm were prepared by a solvent-thermal method.The products were characterized by X-ray diffraction（XRD）,scanning electron microscope（SEM）,and transmission electron microscope（TEM）.The results indicated that increasing reaction temperature was beneficial to the growth of NaTaO3 particles.Pure NaTaO3 can be prepered at 140 ℃ in hydrothermally system.The solvent-thermal environment can reduce the reaction temperature to 120 ℃.Photocatalysis experiment was carried out under ultraviolet lamp using 5 mg·L^-1safranine solution as the degradation solution.The results showed the particles had a high photocatalysis efficiency.