Zhang Wuxiang, Zhang Hao, Yan Xin, Zhang Ming, Luo Rui, Qi Junwen, Sun Xiuyun, Shen Jinyou, Han Weiqing, Wang Lianjun, Li Jiansheng
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, Key Laboratory of New Membrane Materials, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, Key Laboratory of New Membrane Materials, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
J Hazard Mater. 2020 Apr 5;387:121701. doi: 10.1016/j.jhazmat.2019.121701. Epub 2019 Nov 15.
Developing high-effective catalysts with tailored composition and structure has attracted extensive attention. In this work, a serious of shape-specific Fe/Co Prussian blue analogs (PBAs), including concave, core-shell and polygonal cubes were prepared by the one-step hydrothermal reaction, which were altered by adjusting the ratio of Fe/Co in the initial reaction system. The catalytic performance toward bisphenol A (BPA) degradation was significantly affected by the ultimate structure and Fe/Co composition. Benefiting from appropriate elemental proportions, unique elemental distribution (rich Co in the core and rich Fe in the shell) and high specific surface areas, the core-shell PBAs (CSPs) exhibits significantly higher peroxymonosulfate (PMS) activation performance toward bisphenol A (BPA) degradation (96 % of removal efficiency within 2 min). The stability of the CSPs catalyst test further indicates that the Fe shell can effectively protect and inhibit the leaching of cobalt ions. Electron paramagnetic resonance (EPR) and radical quenching experiments measurement exhibited that both SO and OH are the main active species in the degradation process. Our work expanded new ideas of designing novel PBAs with controllable shape and specific core-shell composition with excellent catalytic performance.
开发具有定制组成和结构的高效催化剂引起了广泛关注。在这项工作中，通过一步水热反应制备了一系列特定形状的铁/钴普鲁士蓝类似物（PBA），包括凹面体、核壳结构和多边形立方体，它们通过调节初始反应体系中铁/钴的比例而改变。对双酚A（BPA）降解的催化性能受到最终结构和铁/钴组成的显著影响。得益于适当的元素比例、独特的元素分布（核中富含钴，壳中富含铁）和高比表面积，核壳结构的PBA（CSP）对双酚A（BPA）降解表现出显著更高的过一硫酸盐（PMS）活化性能（2分钟内去除效率达96%）。CSP催化剂的稳定性测试进一步表明，铁壳可以有效地保护和抑制钴离子的浸出。电子顺磁共振（EPR）和自由基猝灭实验测量表明，SO和OH都是降解过程中的主要活性物种。我们的工作拓展了设计具有可控形状和特定核壳组成且具有优异催化性能的新型PBA的新思路。
