Improving the charge properties of the WO3 photoanode using a BiFeO3 ferroelectric nanolayer dagger
Improving the charge properties of the WO3 photoanode using a BiFeO3 ferroelectric nanolayer dagger
复制标题
使用 BiFeO3 铁电纳米层匕首改善 WO3 光电阳极的电荷特性
DOI：
10.1039/d0cp06214f
复制
发表时间：
2021
影响因子：
3.3
通讯作者：
Chen Zhihong
中科院分区：
文献类型：
--
作者：
Wang Mingqi;Zeng Qingyi;Chang Sheng;Li Shanshan;Hu Chun;Chen Zhihong
三氧化钨（WO 3）是一种很有前途的可见光响应光阳极材料，但其电荷传输和收集性能较差。采用旋涂法成功制备了具有增强光电化学性能的WO 3/BiFeO 3核/壳结构光阳极（WO 3/BFO）。最佳的WO 3/BFO在0.6 V vs. Ag/AgCl下显示出优异的增强和稳定的光电流密度为1.22mA cm-2，这比AM 1.5照明下的WO 3高出1.244%。Mott-Schottky测试、强度调制光电化学谱和瞬态光电流衰减的结果表明，BFO铁电纳米层显著提高了WO 3/BFO的电荷密度，改善了其电荷传输和分离性能以及电荷寿命，这可能是WO 3/BFO光电转换活性增强的原因。
Tungstic oxide (WO3) is a promising visible-light-responsive photoanode material, but it has poor charge transport and collection properties. In this study, a WO3/BiFeO3 core/shell photoanode (WO3/BFO) with enhanced photoelectrochemical (PEC) performance was successfully prepared using a facile spin-coating method. The optimal WO3/BFO shows an excellently enhanced and stable photocurrent density of ∼2.83 mA cm−2 at 0.6 V vs. Ag/AgCl, which is ∼244% more than WO3 under AM 1.5 illumination. The results of Mott–Schottky tests, intensity modulated photoelectrochemical spectroscopy and transient photocurrent decay indicated that the BFO ferroelectric nanolayer significantly enhances the charge density of the WO3/BFO, and improves its charge transport and separation property and charge lifetime, which could be the reason for the enhanced PEC activity of WO3/BFO.