Pr^(3+):SrTiO_(3)/TiO_(2)-N复合纳米纤维制备及其蓄能光催化活性  

Preparation and Photocatalytic Performance of Light-Storing Photocatalyst Pr^(3+):SrTiO_(3)/TiO_(2)-N Composite Nanofibers

作　　者：曹铁平[1] 李跃军[1] 孙大伟 Cao Tieping;Li Yuejun;Sun Dawei(Research Centre of Nano Photocatalyst Materials,Baicheng Normal University,Baicheng 137000,China)

机构地区：[1]白城师范学院纳米光催化材料研究中心,吉林白城137000

出　　处：《中国稀土学报》2023年第4期709-716,I0002,共9页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21573003);吉林省自然科学基金项目(20140101118JC)资助。

摘　　要：以电纺TiO_(2)-N纳米纤维为基质和反应物,结合一步水热法制备了Pr^(3+):SrTiO_(3)/TiO_(2)-N复合纳米纤维。运用X射线衍射(XRD)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)、X射线光电子能谱(XPS)、紫外-可见漫反射(UV-Vis DRS)和电子顺磁共振(EPR)等分析测试手段对其物理、化学性质进行了系统表征。结果表明:Pr^(3+):SrTiO_(3)在光照时能够储存外界光能,并在黑暗环境中缓慢释放,为TiO_(2)-N光催化反应提供能源,实现了无外光照射下的催化降解功能。Pr^(3+):SrTiO_(3)/TiO_(2)-N复合纳米纤维,可见光照120 min,亚甲基蓝被完全降解;四次交替光照(20 min)和黑暗(100 min)实验,其降解率也能达到100%。The Pr^(3+):SrTiO_(3)/TiO_(2)-N composite nanofibers were prepared by employing electrospun TiO_(2)-N nanofibers as substrate and reactant,combined with one-step hydrothermal method.The X-ray diffraction(XRD),scanning electron microscopy(SEM),high-resolution transmission electron microscopy(HRTEM),X-ray photoelectron spectroscopy(XPS),ultraviolet-visible diffuse reflectance(UV-Vis DRS)and electron paramagnetic resonance(EPR)were adopted to study the physical and chemical properties of as-prepared composite nanofibers.The results show that Pr^(3+):SrTiO_(3)can store external light energy when illuminated,and slowly release it in the dark environment,providing energy for the TiO_(2)-N photocatalytic reaction and achieving the catalytic degradation ability without external light irradiation.The MB is completely degraded over Pr^(3+):SrTiO_(3)/TiO_(2)-N composite nanofibers under visible light for 120 min.Moreover,the MB can be degraded by 100%in condition of four alternating light(20 min)and dark(100 min).

关 键 词：Pr^(3+):SrTiO_(3)/TiO_(2)-N复合纳米纤维 蓄能光催化剂 静电纺丝 一步水热法 光催化 

分 类 号：O643[理学—物理化学]