Coral-like WO3/BiVO4 photoanode constructed via morphology and facet engineering for antibiotic wastewater detoxification and hydrogen recovery
Coral-like WO3/BiVO4 photoanode constructed via morphology and facet engineering for antibiotic wastewater detoxification and hydrogen recovery
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DOI：
10.1016/j.cej.2021.131817
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发表时间：
2021-08-18
影响因子：
15.1
通讯作者：
Yu, Hongbing
中科院分区：
文献类型：
--
作者：
Chi, Zexu;Zhao, Jingyun;Yu, Hongbing
形貌工程和小面工程是制备高性能光电化学材料的有效方法。通过简单控制电沉积电荷量制备了不同形貌的WO 3/BiVO 4异质结光阳极。珊瑚状WO 3/BiVO 4光阳极中BiVO 4的{110}和{011}晶面取向生长，可显著增强光生载流子的分离和转移，而{-121}晶面的暴露对光电转换性能有负面影响。4.71 cm- 2和2.9 mA.cm- 2的光电流密度分别为亚硫酸盐和水的氧化，上级大多数报道的结果。在此基础上，构建了光电化学-氯气（PEC-Cl）系统，用于抗生素废水的解毒和氢气回收。分析结果表明，该系统能快速有效地去除磺胺甲恶唑，降低其毒性，同时具有较高的氢气产率。反应性氯物种（RCS），尤其是Cl 2。和ClO.，占主导地位的磺胺甲恶唑清除。并对磺胺甲恶唑的降解途径进行了初步探讨。
Morphology and facet engineering have been proved efficient strategies to prepare high-performance photoelectrochemical (PEC) materials. WO3/BiVO4 heterojunction photoanodes with different morphologies were prepared by simply controlling the amount of electrodeposited charge. The coral-like WO3/BiVO4 photoanode with the orientation growth of {110} and {011} active facets of BiVO4 exhibited the optimal PEC performance due to significantly enhanced separation and transfer of photogenerated charge carriers, while the exposure of {-121} facets showed negative effects. 4.71 mA.cm- 2 and 2.9 mA.cm- 2 of photocurrent densities were obtained for sulfite and water oxidation, respectively, superior to most reported results. Subsequently, a photoelectrochemical-chlorine (PEC-Cl) system was constructed for antibiotic wastewater detoxification with hydrogen recovery. The analysis results indicated that the system can quickly and effectively remove sulfamethoxazole and reduce its toxicity concurrent with high hydrogen yield. The reactive chlorine species (RCS), especially Cl2.- and ClO., dominated the sulfamethoxazole removal. Possible degradation pathways of sulfamethoxazole were also elucidated.