College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China; Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China; Department of Petrochemical Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
Chemosphere. 2022 Jan;287(Pt 4):132384. doi: 10.1016/j.chemosphere.2021.132384. Epub 2021 Sep 28.
BiFeO nanoparticle decorated on flower-like ZnO (BiFeO/ZnO) was fabricated through a facile hydrothermal-reflux combined method. This material was utilized as a composite photocathode for the first time in microbial fuel cell (MFC) to reduce the copper ion (Cu) and power generation concomitantly. The resultant BiFeO/ZnO-based MFC displayed distinct photoelectrocatalytic activities when different weight percentages (wt%) BiFeO were used. The 3 wt% BiFeO/ZnO MFC achieved the maximum power density of 1.301 W m in the catholyte contained 200 mg L of Cu and the power density was greatly higher than those pure ZnO and pure BiFeO photocathodes. Meanwhile, the MFC exhibited 90.7% removal of Cu within 6 h under sunlight exposure at catholyte pH 4. The addition of BiFeO nanoparticles not only manifested outstanding capability in harvesting visible light, but also facilitated the formation of Z-scheme BiFeO/ZnO heterojunction structure to induce the charge carrier transfer along with enhanced redox abilities for the cathodic reduction. The pronounced electrical output and Cu reduction efficiencies can be realized through the synergistic cooperation between the bioanode and BiFeO/ZnO photocathode in the MFC. Furthermore, the developed BiFeO/ZnO composite presented a good stability and reusability of photoelectrocatalytic activity up to five cyclic runs.
通过简便的水热回流联合方法制备了花状 ZnO 上负载 BiFeO 纳米粒子（BiFeO/ZnO）。该材料首次被用作微生物燃料电池（MFC）中的复合光阴极，同时还原铜离子（Cu）和发电。当使用不同重量百分比（wt%）的 BiFeO 时，所得的基于 BiFeO/ZnO 的 MFC 表现出明显的光电催化活性。在含有 200mg·L 的 Cu 的阴极液中，3wt%BiFeO/ZnO MFC 达到了 1.301W·m 的最大功率密度，该功率密度远高于纯 ZnO 和纯 BiFeO 光阴极。同时，在阴极液 pH 4 下，MFC 在阳光照射下 6 小时内对 Cu 的去除率达到了 90.7%。BiFeO 纳米粒子的添加不仅表现出了在可见光下的出色收集能力，还促进了 Z 型 BiFeO/ZnO 异质结结构的形成，从而促进了载流子的转移以及增强了对阴极还原的氧化还原能力。在 MFC 中，生物阳极和 BiFeO/ZnO 光阴极之间的协同合作可以实现显著的电输出和 Cu 还原效率。此外，开发的 BiFeO/ZnO 复合材料在五个循环运行中表现出良好的光电催化活性稳定性和可重复使用性。
