School of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; School of Chemical and Environmental Engineering, Wuyi University, Jiangmen 529020, China.
School of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; School of Chemical and Environmental Engineering, Wuyi University, Jiangmen 529020, China.
J Colloid Interface Sci. 2018 Dec 15;532:758-766. doi: 10.1016/j.jcis.2018.07.032. Epub 2018 Jul 10.
A series of heterostructured BiVO/WO photoanodes were successfully prepared via a two-step method of hydrothermal deposition and impregnation. The optimized BiVO/WO sample showed the highest photocurrent density of ∼880 μA/cm at 0.8 V (vs Ag/AgCl) in 0.1 M KHPO aqueous solution (pH 7) under simulated AM1.5 illumination. The optimized BiVO/WO photoanode was coupled with a Pt/C air-breathing cathode to build up a visible-light responsive PFC system. The as-prepared PFC system showed outstanding photoelectrocatalytic performances in converting organics into electricity, and when glucose was used as the 'fuel', the maximum power density (P) and the short-circuit current density (I) were 8.58 μW/cm and 91.8 μA/cm, respectively. Degradation experiments showed that the removal rate of tetracycline hydrochloride in PFC with BiVO/WO photoanode and Pt/C air-breathing cathode was ∼87.2% in 8 h, which was much higher than photolysis and photocatalysis process. The mechanism responsible for the enhanced photoelectrocatalytic performance of the as-prepared PFC system was also discussed.
通过水热沉积和浸渍两步法成功制备了一系列异质结构的 BiVO/WO 光阳极。在模拟 AM1.5 光照下，在 0.1 M KHPO 水溶液（pH 7）中，优化后的 BiVO/WO 样品在 0.8 V（相对于 Ag/AgCl）时表现出最高的光电流密度约为 880 μA/cm。优化后的 BiVO/WO 光阳极与 Pt/C 空气阴极耦合，构建了可见光响应的 PFC 系统。所制备的 PFC 系统在将有机物转化为电能方面表现出出色的光电催化性能，当以葡萄糖为“燃料”时，最大功率密度 (P) 和短路电流密度 (I) 分别为 8.58 μW/cm 和 91.8 μA/cm。降解实验表明，在 BiVO/WO 光阳极和 Pt/C 空气阴极的 PFC 中，盐酸四环素的去除率在 8 小时内约为 87.2%，远高于光解和光催化过程。还讨论了制备的 PFC 系统增强光电催化性能的机制。
