作　　者： (王翠娥）; (王宁）; (刘新华）;

机构地区： 安徽工程大学纺织服装学院,芜湖241000

出　　处： 《无机化学学报》 2017年第9期1618-1624,共7页

摘　　要： 基于静电纺丝技术构筑了稳定均一的Ag-石墨烯-TiO_2纳米复合纤维;并利用SEM、TEM、XRD、EDS和Raman等表征了材料的微观结构与组分;随后,我们研究了该复合纤维在可见光下的光电转换性能。结果表明:掺杂既可降低TiO_2材料的禁带宽度,也能减缓光生电子与空穴的复合淬灭;Ag纳米晶的局域等离激元可增强纤维对可见光的吸收,石墨烯能促进光生电子与空穴的有效分离;可见光条件下,相比较于单一的TiO_2纳米纤维,复合纤维的光电流密度提高4倍,达到0.81μA·cm-2。 A highly-uniform nanofiber of Ag-graphene-Ti02 was successfully fabricated by the electrospinning technique, which exhibited significantly increased visible light absorption （A 〉 420 nm）and improved photoeurrent response. The Ag nanopartieles （AgNPs） and graphenes located in Ti02 fibers induced an increase in the visible-light photocurrent response. The photoeun-ent density of Ag-graphene-TiO2 fibers is 4-fold higher than the pristine TiO2 fibers under visible light. The increased photocurrent response in visible light region is resulted from the strong interaction between TiO2 fibers and graphene sheets, as well as the localized surface plasmon resonance of AgNPs.

关 键 词： 静电纺丝 石墨烯 光电转换