Ag-TiO_2纳米纤维的制备及其光电转换性能研究  

Photocurrent responses of electrospun Ag-TiO_2 nanofiber

作　　者：王翠娥[1] 王学文[1] 刘新华[1] 

机构地区：[1]安徽工程大学纺织服装学院,芜湖241000

出　　处：《化工新型材料》2017年第1期62-64,共3页New Chemical Materials

基　　金：国家自然科学基金(21302001);安徽省高校优秀青年人才支持计划重点项目(gxyqZD2016119);安徽省高校科研创新平台团队建设项目(皖教秘科[2015]49号)

摘　　要：利用静电纺丝技术制备尺寸均一、性能稳定的Ag-TiO_2复合纳米纤维。结合了纳米银颗粒的表面等离激元共振效应,克服了TiO_2材料比表面积小、光生电子与空穴复合几率高以及对光生载流子量子化效率低的缺点,并且Ag纳米颗粒在复合材料中有很好的可调节性,同时这种材料的制备工艺简单、易重复。采用扫描电子显微镜(SEM),X射线衍射(XRD)对Ag-TiO_2复合纤维进行了表征,结果证明产物为Ag-TiO_2复合纳米纤维,且纤维分散性好、长径比大,同时掺杂均匀。相比较于TiO_2纳米纤维,Ag-TiO_2纳米纤维的光电转换性能明显提高。此外研究了Ag掺杂量对复合材料光电转换效果的影响,结果表明,掺杂10wt%Ag的Ag-TiO_2复合纳米纤维光电转换效率最高。Making efficient use of solar energy is one of the vital challenges.Electrospinning technology was employed to make a nanofiber consisting of TiO_2 and Ag with desirable dispersion.The electrical and optical properties of nanofiber were investigated,applied it in cells as an electrode material,and achieved an improved conversion efficiency.There was a 4times increase in the photocurrent conversion efficiency improvement.Such improvements mainly arised from the surface plasmon resonance（SPR）effect of Ag nanoparticles,due to the formation of Schottky junction between TiO_2 and Ag nanoparticles.Compared with TiO_2 nanofiber,the as-obtained nanofibers exhibited excellent photocurrent activity,the photocurrent of 2.4μA/cm^2 was immediately observed by employing Ag/TiO_2.These results proposed that plasmon resonance was an effiective way to improve photocurrent.

关 键 词：静电纺丝 二氧化钛 银 光电转换 

分 类 号：TQ342.8[化学工程—化纤工业]