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具有高效稳定可见光驱动光催化降解罗丹明B性能的AgPO/GO/NiFeO复合材料的制备

Fabrication of AgPO/GO/NiFeO composites with highly efficient and stable visible-light-driven photocatalytic degradation of rhodamine B.

作者信息

Zhou Tianhong, Zhang Guozhen, Yang Hao, Zhang Hongwei, Suo Ruini, Xie Yingshuang, Liu Gang

机构信息

School of Environmental and Municipal Engineering, Lanzhou Jiaotong University Lanzhou 730000 P. R. China

Research & Development Center for Eco-material and Eco-chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 P. R. China.

出版信息

RSC Adv. 2018 Aug 6;8(49):28179-28188. doi: 10.1039/c8ra02962h. eCollection 2018 Aug 2.

DOI:10.1039/c8ra02962h
PMID:35542723
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9084322/
Abstract

Effective visible-light-driven AgPO/GO/NiFeO -scheme magnetic composites were successfully fabricated by a simple ion-exchange deposition method. The AgPO/GO/NiFeO (8%) composite exhibited excellent photocatalytic activity (degradation efficiency was ∼96% within 15 min and kinetic constant reached 0.1956 min) and stability when compared to AgPO, NiFeO, and AgPO/NiFeO for rhodamine B (RhB) degradation. Furthermore, by electrochemical and fluorescence measurements, the AgPO/GO/NiFeO (8%) material also showed larger transient photocurrent, lower impedance, and longer fluorescence lifetime (7.82 ns). Comparing the activity result dependence with characterization results, it was indicated that photocatalytic activity depended on fast charge transfer from AgPO to NiFeO through GO sheet. The h and ·O species played important roles in RhB degradation under visible-light. A possible -scheme mechanism is proposed over the AgPO/GO/NiFeO (8%) composite. This study might provide a promising visible light responsive photocatalyst for the photocatalytic degradation of organic dyes in wastewater.

摘要

通过简单的离子交换沉积法成功制备了高效的可见光驱动的AgPO/GO/NiFeO复合磁性材料。与AgPO、NiFeO和AgPO/NiFeO相比，AgPO/GO/NiFeO（8%）复合材料在罗丹明B（RhB）降解方面表现出优异的光催化活性（15分钟内降解效率约为96%，动力学常数达到0.1956 min）和稳定性。此外，通过电化学和荧光测量，AgPO/GO/NiFeO（8%）材料还表现出更大的瞬时光电流、更低的阻抗和更长的荧光寿命（7.82 ns）。将活性结果依赖性与表征结果进行比较表明，光催化活性取决于通过氧化石墨烯片从AgPO到NiFeO的快速电荷转移。h和·O物种在可见光下RhB降解中起重要作用。提出了一种可能的AgPO/GO/NiFeO（8%）复合材料的机理。该研究可能为废水中有机染料的光催化降解提供一种有前景的可见光响应光催化剂。

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