Department of Energy Science and Technology, Smart Living Innovation Technology Center, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea.
Department of Energy Science and Technology, Smart Living Innovation Technology Center, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea.
J Environ Manage. 2020 Feb 15;256:109930. doi: 10.1016/j.jenvman.2019.109930. Epub 2019 Dec 13.
To fabricate an efficient, eco-friendly and stable photocatalyst, the current work describes a demonstration of simple synthesis approach of AgPO/MnFeO(x wt%)/reduced graphene oxide composites. AgPO/MnFeO (5 wt%) revealed superior activity for decontamination of dye pollutant. Further, rGO was incorporated with AgPO/MnFeO (5 wt%) to investigate its effect on their overall properties. The resultant composites were characterized by various analytical techniques to confirm their structural and physical-chemical features. FESEM analysis showed that morphology of AgPO varied significantly from orthorhombic dodecahedrons to tripods and tetrapods with the combinations MnFeO (5 wt%), and MnFeO (5 wt%)+rGO respectively. The photocatalytic decontamination of toxic organic dyes tested against Rhodamine B(RhB) and 4-Nitrophenol. The outstanding performance for decontamination of RhB was observed for AgPO/MnFeO(5 wt%)/rGO (~99% in 5 min) with the rate of k = 7.28 × 10 min. The enhanced activity of AgPO/MnFeO(5 wt%)/rGO composites credited to co-catalytic effects of MnFeO and physiochemical properties of rGO which leads to making intimate contact with AgPO to form heterojunction and rGO served as a medium for charge transfer to prevent their recombination. The incorporation of rGO in AgPO/MnFeO (5 wt%) composite leads to a considerable increase in the photocatalytic activity by offering improved surface area and properties, high electron stability and mobility. Based on experiment results, the photocatalytic enhancement mechanism for organic pollutants degradation was discussed. The recyclability of AgPO/MnFeO(5 wt%)/rGO hierarchical composite was evaluated by replicated photocatalytic reaction trials. Overall, the morphological transformation of AgPO/MnFeO(5 wt%)/rGO composites played a dynamic role in determining their photocatalytic activity towards the organic industrial dye pollutants.
为了制造高效、环保且稳定的光催化剂，本工作展示了一种简单的 AgPO/MnFeO(x wt%)/还原氧化石墨烯复合材料的合成方法。AgPO/MnFeO(5 wt%)对染料污染物的降解具有优异的活性。此外，将 rGO 与 AgPO/MnFeO(5 wt%)结合，研究其对复合材料整体性能的影响。通过各种分析技术对所得复合材料进行了表征，以确认其结构和物理化学特性。FESEM 分析表明，AgPO 的形态从正交十二面体到三脚架和四脚架发生了显著变化，分别与 MnFeO(5 wt%)和 MnFeO(5 wt%)+rGO 组合。以罗丹明 B(RhB)和 4-硝基苯酚为目标污染物，对有毒有机染料进行了光催化降解实验。AgPO/MnFeO(5 wt%)/rGO 在 5 分钟内对 RhB 的去除率达到 99%，表现出出色的降解性能，其速率常数 k 为 7.28×10 min。AgPO/MnFeO(5 wt%)/rGO 复合材料的活性增强归因于 MnFeO 的共催化效应和 rGO 的物理化学性质，这使得它们与 AgPO 形成紧密接触的异质结，并作为载流子转移的介质，防止它们的复合。rGO 的掺入提高了 AgPO/MnFeO(5 wt%)复合材料的光催化活性，原因是提供了更大的比表面积和更好的性能、更高的电子稳定性和迁移率。根据实验结果，讨论了有机污染物降解的光催化增强机制。通过重复的光催化反应试验评估了 AgPO/MnFeO(5 wt%)/rGO 分级复合材料的可回收性。总的来说，AgPO/MnFeO(5 wt%)/rGO 复合材料的形态转化在确定其对有机工业染料污染物的光催化活性方面起着重要作用。
