In-situ fabrication of AgI-BiOI nanoflake arrays film photoelectrode for efficient wastewater treatment, electricity production and enhanced recovery of copper in photocatalytic fuel cell
In-situ fabrication of AgI-BiOI nanoflake arrays film photoelectrode for efficient wastewater treatment, electricity production and enhanced recovery of copper in photocatalytic fuel cell
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原位制造 AgI-BiOI 纳米片阵列薄膜光电极，用于高效废水处理、发电和提高光催化燃料电池中铜的回收率
DOI：
10.1016/j.cattod.2018.12.026
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发表时间：
2020-01-01
期刊：
影响因子：
5.3
通讯作者：
Shu, Dong
中科院分区：
文献类型：
--
作者：
Hu, Lingling;Liao, Yuhong;Shu, Dong
本研究通过一种简便、可控的方法原位合成了一种新型的AgI纳米颗粒-BiOI纳米片阵列(AgI-BiOINF)薄膜电极，并首次提出将其作为光催化燃料电池(PFC)的声阳极。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis DRS)和光致发光(PL)等测试手段对AgI-BiOInFS薄膜的结构和光学性能进行了表征，并通过光电流-时间暂态响应和电化学阻抗谱(EIS)对AgI-BiOInFS薄膜电极的光电化学活性进行了表征。从发电效率和甲酸降解率两个方面对AgI-BiOINFS薄膜的光催化活性进行了评价。AgI-BiOInFS薄膜的开路电压(V-oc)、光电流密度(J(Sc))和最大功率密度分别为0.724 V、90.02muA cm(-2)和16.25muW cm(-2)，比BiOInFS薄膜有很大的改善。同样，AgI-BiOINFS薄膜对甲酸的光催化降解效率明显高于BiOINFS薄膜。此外，AgI-BiOINFS电极在四个操作周期内对甲酸降解和发电具有良好的稳定性。将PFC产生的电能应用于AgI-BiOINFS-Ti光电催化(PEC)反应器，以促进有机物的降解和铜的回收。通过反应物种捕集和ESR实验进一步探讨了PEC体系光催化性能增强的机理。
In this study, a novel hybrid AgI nanoparticles-BiOI nanoflake arrays (AgI-BiOINFs) film electrode was in situ synthesized via a facile and controllable approach and proposed as a phonoanode for the photocatalytic fuel cell (PFC) for the first time. The structure and optical properties of AgI-BiOINFs film were characterized by means of X-ray diffraction (XRD), scanning electronic microscopy (SEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence (PL) while the photoelectrochemical activity of AgI-BiOINFs film electrode was characterized by the photocurrent-time transient response and electrochemical impedance spectroscopy (EIS). The photocatalytic activity of AgI-BiOINFs film was evaluated in the term of the electricity generation efficiency and degradation efficiency of formic acid. The open-circuit voltage (V-oc), photocurrent density (J(sc)) and the maximum power density of AgI-BiOINFs film in PFC were 0.724 V, 90.02 mu A cm(-2) and 16.25 mu W cm(-2), respectively, exhibiting a much improvement over BiOINFs film. Similarly, the photocatalytic degradation efficiency of formic acid by AgI-BiOINFs film was significantly higher than that of BiOINFs film. Furthermore, the AgI-BiOINFs electrode has excellent stability towards formic acid degradation and electricity production over four operation cycles. The electricity generated by the PFC was applied on AgI-BiOINFs-Ti photoelectrocatalytic (PEC) reactor to enhance the degradation of organic compounds and recovery of copper. The mechanism of enhanced photocatalytic performance in PEC system was further explored by reactive species trapping and ESR experiments.