A highly efficient BiVO₄/WO₃/W heterojunction photoanode was fabricated based on the nanoporous WO₃ film, which was prepared on the tungsten plate by anodic oxidation, in order to facilitate the electrons transfer from BiVO₄ to WO₃ by providing a natural connection between WO₃ film and W substrate. Then, a visible-light responsive dual photoelectrode photocatalytic fuel cell (PFC) consisted of BiVO₄/WO₃/W photoanode and Pt modified commercial buried junction silicon (Pt/BJS) photocathode was constructed. The results showed that the optimized BiVO₄/WO₃/W photoanode obtained a photocurrent of 2.01mA/cm² at 0.6V (vs Ag/AgCl) in 0.1M KH₂PO₄ (pH 7) electrolyte under simulated AM1.5 solar light, which was 180% and 205% higher than that of bare WO₃ film and bare BiVO₄ film, respectively. The established dual photoelectrode PFC showed high converting performance of organics into electricity. For example, a short-circuit current density of 0.26mAcm⁻², which is higher than most of the reported visible-light responsive dual photoelectrode PFC systems, was obtained with the open-circuit voltage of 0.78V and maximum power output of 2.0×10⁻⁴ Wcm⁻² in 20mgL⁻¹ tetracycline hydrochloride. Furthermore, a removal ratio of 78% after 4h was achieved with a stable output photocurrent in the degradation process.

中文翻译：

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用于可见光响应双光电极光催化燃料电池的高效BiVO4 / WO3 / W异质结光电阳极

以纳米多孔WO ₃膜为基础，通过阳极氧化在钨板上制备了高效的BiVO ₄ / WO ₃ / W异质结光电阳极，以通过提供天然电子来促进电子从BiVO ₄转移至WO ₃。 WO ₃膜与W衬底之间的连接。然后，构建了由BiVO ₄ / WO ₃ / W光电阳极和Pt改性的商用掩埋结硅（Pt / BJS）光电阴极组成的可见光响应双光电极光催化燃料电池（PFC）。结果表明，优化的BiVO ₄ / WO ₃/ W光电阳极在模拟的AM1.5太阳光下，在0.1M KH ₂ PO ₄（pH 7）电解液中，在0.6V（vs Ag / AgCl）下在0.6V（vs Ag / AgCl）处获得2.01mA / cm ²的光电流。分别是裸WO ₃膜和BiVO ₄裸膜。建立的双光电极PFC显示出有机物到电的高转化性能。例如，在开路电压为0.78V，最大输出功率为2.0倍的情况下，获得的短路电流密度为0.26mAcm ^-2，高于大多数报道的可见光响应双光电极PFC系统。 20 mgL ^-1中的10 ^-4 Wcm ^-2盐酸四环素。此外，在降解过程中，在稳定的输出光电流下，经过4小时后，去除率达到了78％。