核壳WO3/BiVO4纳米纤维薄膜的制备与光电化学分解水研究
首发时间:2016-05-30
摘要:本文基于静电纺丝热分解过程在掺杂氟的二氧化锡导电玻璃上制备了核壳WO3/BiVO4 纳米纤维薄膜,并进行了相关光电化学分解水测试研究。该核壳结构利用了WO3/BiVO4界面构成的二型交错带隙结构,达到了加速光生电荷的分离的目的。同时WO3还可作为薄膜的立体支架起到传输光生电荷、增大反应表面积的作用。同时,BiVO4则可以作为可见光吸收层并参与单侧产氧反应。研究结果表明,该核壳结构光电极在工作电极电压为1.9 V (相对于可逆氢电极)时,光电流密度可以达到1.75 mA/cm2。而同样方法制备的单一材料的WO3和BiVO4 光电极在相同工作电位下光电流密度仅为相应的0.08 mA/cm2 和0.05 mA/cm2。
关键词: 新能源 WO3 BiVO4 静电纺丝 光电化学制氢
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Core-shell WO3/BiVO4 nanofiber film for water splitting
Abstract:In this paper, a core-shell WO3/BiVO4 was fabricated on fluorine-doped tin oxide coated substrates based on electrospinning pyrolysis. A type II staggered bandgap structure was formed on the WO3/BiVO4 interface, and accerlated the charge seperation. Morvoer, WO3 was served as the charge transport channel and framework, while BiVO4 was used as the visible light absorber and supplied the oxien evolution reaction sites. The experiment results reveal the photocurrent density of this core shell nanofiber film could reach 1.75 mA/cm2 at 1.9 V vs. RHE. However, the pure WO3 and BiVO4 electrodes prepared by the same process only posses the photocurrent densities around 0.08 mA/cm2 and 0.05 mA/cm2 respectivily.
Keywords: New Energy WO3 BiVO4 electrospinning Photoelectrochemical water splitting
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核壳WO3/BiVO4纳米纤维薄膜的制备与光电化学分解水研究
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