CAJ | 학술논문

以聚乙烯吡咯烷酮(PVP)溶胶,钛酸四正丁酯和PVP溶胶,银颗粒为前驱体,以共轴静电纺丝法制备了银填充的TiO2中空纳米纤维.将双组分纤维在200℃下热处理去除乙醇与表面吸附水后,继而在空气气氛中焙烧至600℃.可以得到在内表面上沉积银颗粒的TiO2纳米管,银颗粒的直径为5-40 nm,TiO2纳米管的外径150-300 nm.管臂厚10-20 nm.用红外吸收光谱(IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等测试手段对超细纤维进行了表征.中空纤维的直径和管壁可以通过改变电纺参数来调节.与Ag-TiO2纳米纤维、TiO2纳米中空纤维、TiO2纳米纤维及TiO2纳米粉体相比较,Ag颗粒填充的TiO2纳米中空纤维在光分解亚甲基蓝上表现出了更好的光催化性能.
이취을희필각완동(PVP)용효,태산사정정지화PVP용효,은과립위전구체,이공축정전방사법제비료은전충적TiO2중공납미섬유.장쌍조분섬유재200℃하열처리거제을순여표면흡부수후,계이재공기기분중배소지600℃.가이득도재내표면상침적은과립적TiO2납미관,은과립적직경위5-40 nm,TiO2납미관적외경150-300 nm.관비후10-20 nm.용홍외흡수광보(IR)、X사선연사(XRD)、소묘전자현미경(SEM)、투사전자현미경(TEM)등측시수단대초세섬유진행료표정.중공섬유적직경화관벽가이통과개변전방삼수래조절.여Ag-TiO2납미섬유、TiO2납미중공섬유、TiO2납미섬유급TiO2납미분체상비교,Ag과립전충적TiO2납미중공섬유재광분해아갑기람상표현출료경호적광최화성능.
This study investigated the coaxial electrospinning process of silver filling in TiO2 ultrafine hollow fibers using polyvinyl pyrrolidone (PVP) sol/titanium n-butyloxide (Ti(OC4H9)4) and PVP sol/silver nanoparticles as pore-directing agents. The bicomponent fibers were heat treated at 200℃(2 and calcined at 600 ~C. Silver particles having diameters of 5 to 40 nm were deposited on the inner surface of the long hollow TiO2 nanofibers (outer diameter of 150-300 am) with mesoporous walls (thickness of 10-20 nm). The morphological structure of the filled ultrafine hollow fibers has been studied by means of infrared (IR) spectrum, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The diameters and wall thicknesses of the hollow fibers could be tuned by adjusting the electrospinning parameters. Compared with other nanostructured TiO2 materials, such as mesoporous Ag TiO2 blending fibers, TiO2 hollow nanofibers, TiO2 nanofibers, and TiO2 powders, the silver filled TiO2 hollow fibers exhibited a higher photocatalytic activity toward the degradation of methylene blue.