g-C3N4/Cu5FeS4/Au三元光催化剂的设计、合成及催化性质的研究

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摘要采用简单的方法成功合成了三元g-C₃N₄/Cu₅FeS₄/Au异质结光催化剂，系统研究了Au沉积和Cu₅FeS₄耦合对g-C₃N₄性能的影响，将三乙醇胺作为牺牲剂并通过在可见光照射下的光解水反应评估其光催化活性.实验结果表明：g-C₃N₄/0.75%Cu₅FeS₄/0.75% Au纳米复合材料具有最高的析氢活性(119.52μmol·h^-1·g^-1)，分别是纯g-C₃N₄(10.44μmol·h^-1·g^-1)的11.45倍和g-C₃N₄/Cu₅FeS₄(27.32 μmol·h^-1·g^-1)二元结构的4.37倍.光催化活性的提高可归因于以Cu₅FeS₄为电子桥的组件形成的典型II型异质结可以提高电荷分离效率，并且三个组件间牢固界面的接触可以提供更多的电荷迁移途径，以实现跨界面的有效电荷转移.

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光催化')" href="#">

光催化电荷迁移异质结

Abstract:

A series of g-C₃N₄/Cu₅FeS₄/Au ternary heterojunction were synthesized by simple method.The effects of Au deposition and Cu₅FeS₄coupling on the performance of g-C₃N₄were systematically studied,and the photocatalytic activity of triethanolamine as a sacrificial agent was evaluated by photolysis of water under visible light irradiation.Combining with the results of a series of characterized analysis it is shown that:Theg-C₃N₄/0.75%Cu₅FeS₄/0.75%Au ternary composites exhibited highly enhanced visible light photocatalytic H₂ evolution from water-splitting(119.52μmol·h^-1·g^-1),which was about 11.45 and 4.37 times higher than those of g-C₃N₄(10.44 μmol·h^-1·g^-1)andg-C₃N₄/Cu₅FeS₄(27.32 μmol·h^-1·g^-1)under identical conditions.The enhanced photocatalytic activity can be attributed to the assembly with Cu₅FeS₄ as electron bridge forming typical Type II alignment can improve the charge separation efficiency and the strong interfacial contact between the three component can provide more “charge migration way” for efficient charge transfer across the interface.

Key words: photocatalysis')" href="#">

photocatalysis charge transfer heterojunction

出版日期: 2024-04-30 发布日期: 2024-12-31 整期出版日期: 2024-04-30

ZTFLH:

基金资助: 国家自然科学基金（51402198,21671139）

通讯作者: 高雨

作者简介: 郑佳欣（1993—），女，内蒙古通辽人，硕士研究生在读，主要从事光催化领域的研究.

引用本文:

郑佳欣1, 徐宝彤1, 礼峥2, 钱坤1, 徐振和1, 高雨2.

g-C₃N₄/Cu₅FeS₄/Au三元光催化剂的设计、合成及催化性质的研究 [J]. 沈阳化工大学学报, 2024, 38(2): 97-102.
ZHENG Jiaxin1, XU Baotong1, LI Zheng2, QIAN Kun1, XU Zhenhe1, GAO Yu2.

The Design and Synthesis of g-C₃N₄/Cu₅FeS₄/Au Ternary Heterjunction Photocatalyst and Study on Properties . Journal of Shenyang University of Chemical Technology, 2024, 38(2): 97-102.

链接本文:

https://xuebao.syuct.edu.cn/CN/ 或 https://xuebao.syuct.edu.cn/CN/Y2024/V38/I2/97

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[1]	礼峥, 徐宝彤, 邱永堃, 丁茯, 孙亚光, 高雨. g-C₃N₄/CeO₂/Ag三元纳米光催化剂的制备及其光催化性能研究 [J]. 沈阳化工大学学报, 2024, 38(2): 103-109.

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