CAJ | 학술논문

以钛酸正丁酯和无水氯化钙为原料,采用水热法制备了不同光催化特性的CaTiO3粉体.利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对样品的相结构和微观形貌进行了分析,并结合样品的紫外-可见吸收分光光谱吸收曲线表征了材料的吸收特性及带隙宽度.研究了添加不同含量的NaOH对CaTiO3物相结构、微观形貌、带隙宽度和光催化特性的影响.结果表明:NaOH的添加量从0.0315 mol至0.0615 mol时均可获得纯的CaTiO3正交相,粉体外观形貌历经了交错重叠块状到相互分离的方块柱状的转变.对其光学性能和光催化性能显示,NaOH添加量为0.0465 mol的CaTiO3粉体具有最小的带隙宽度,在紫外可见光3 h下对罗丹明B的光催化效率达到了42.7%.
이태산정정지화무수록화개위원료,채용수열법제비료불동광최화특성적CaTiO3분체.이용X사선연사의(XRD)화소묘전자현미경(SEM)대양품적상결구화미관형모진행료분석,병결합양품적자외-가견흡수분광광보흡수곡선표정료재료적흡수특성급대극관도.연구료첨가불동함량적NaOH대CaTiO3물상결구、미관형모、대극관도화광최화특성적영향.결과표명:NaOH적첨가량종0.0315 mol지0.0615 mol시균가획득순적CaTiO3정교상,분체외관형모력경료교착중첩괴상도상호분리적방괴주상적전변.대기광학성능화광최화성능현시,NaOH첨가량위0.0465 mol적CaTiO3분체구유최소적대극관도,재자외가견광3 h하대라단명B적광최화효솔체도료42.7%.
CaTiO3 powders with the different photocatalytic properties were prepared by hydrothermal method using TBOT and CaCl2 as starting materials. The phase,morphologies,and optical absorption properties of as-prepared samples were characterized by X-Ray Diffraction (XRD),Field Emission Scanning Electron Microscope (FESEM) and UV-Vis absorption spectra (UV-Vis). The phase,structure,band gap width and photocatalytic properties of CaTiO3 were studied by adding different NaOH contents. The results showed that CaTiO3 had an orthogonality phase structure and its morphologies changed from staggered overlapping bulk to the separated prisms,when NaOH varied from 0.0315 mol to 0.0615 mol. CaTiO3 power had a lowest band gap width when NaOH content was 0.0465 mol,and the photocatalytic rate degraded for rhodamine B reached 42.7% at the ultraviolet visible for 3 h.