Photocatalytic Degradation and Antibacterial Properties of Fe(3+)-Doped Alkalized Carbon Nitride.
Photocatalytic Degradation and Antibacterial Properties of Fe(3+)-Doped Alkalized Carbon Nitride.
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DOI：
10.3390/nano10091751
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发表时间：
2020-09-04
期刊：
影响因子：
--
通讯作者：
Hou B
中科院分区：
文献类型：
--
作者：
Gao Y;Duan J;Zhai X;Guan F;Wang X;Zhang J;Hou B
发现新材料和改善现有材料的性能是纳米材料领域的主要目标，以增加材料的潜在应用。本文介绍了一种将光催化反应与芬顿反应耦合起来的改性石墨氮化碳（g-C3 N4）光催化剂Fe 3+掺杂碱化氮化碳（g-C3 N4），研究了其对罗丹明B（RhB）的降解和抗菌性能。在可见光照射下，200 min后RhB的降解率为99.9%; coli）和金黄色葡萄球菌（S.金黄色葡萄球菌）300 min后的平均回收率分别为99.9986%、99.9974%和99.9876%。此外，RhB降解的重复性实验表明，所提出的光催化剂具有良好的稳定性和可重复使用性。活性自由基捕获实验表明，超氧自由基（）是主要的活性氧物种。此外，由于Fe 3+的掺杂，在光催化体系中引入了芬顿反应，芬顿反应产生的羟基自由基（·OH）进一步增强了光催化性能。该光催化剂的光催化性能的显着改善可以归因于其更广泛的紫外-可见光吸收特性和芬顿反应的发生。
Discovering novel materials and improving the properties of existing materials are the main goals in the field of photocatalysis to increase the potential application of the materials. In this paper, a modified graphitic carbon nitride (g-C3N4) photocatalyst named Fe3+-doped alkalized carbon nitride, which couples the photocatalytic reaction with the Fenton reaction, is introduced to demonstrate its Rhodamine B (RhB) degradation and antibacterial properties. Under visible-light irradiation, the degradation rate of RhB was 99.9% after 200 min, while the antibacterial rates of Pseudomonas aeruginosa (P. aeruginosa), Escherichia coli (E. coli), and Staphylococcus aureus (S. aureus) after 300 min were 99.9986%, 99.9974%, and 99.9876%, respectively. Moreover, the repetitive experiments of RhB degradation demonstrate that the proposed photocatalysts have excellent stability and reusability. The active free radical trapping experiments reveal that the superoxide radical () is the dominant reactive oxygen species. In addition, the Fenton reaction is introduced into the photocatalytic system due to the doping of Fe3+, and the hydroxyl radical (·OH) produced from the Fenton reaction further enhances the photocatalytic performance. The remarkable improvement in photocatalytic performance of the proposed photocatalyst can be attributed to its broader UV–visible absorption characteristic and the occurrence of the Fenton reaction.
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