Ti3C2/NH2-MIL-125(Ti)复合光催化剂制备及其还原Cr(Ⅵ)性能研究
Construction of Ti3C2/NH2-MIL-125(Ti)Composite Photocatalysts and Study on Its Reduction of Cr(Ⅵ)
蒋雪芬 1马亚丹 1程香涵 2朱联升 1耿龙龙 1李洪亮 1刘中敏1
作者信息
- 1. 德州学院 化学化工学院,山东德州 253023
- 2. 山东理工大学 化学化工学院,山东淄博 255090
- 折叠
摘要
构建异质结复合光催化剂促进光生电荷的分离是提升半导体光催化活性的有效途径.本研究通过一步溶剂热法在NH2-MIL-125(Ti)的合成过程中引入Ti3C2 制得Ti3C2/NH2-MIL-125(Ti)复合光催化剂,利用X射线衍射、扫描电子显微镜、光致发光谱图、光电流响应研究了催化剂的晶相结构、形貌及其光生载流子的分离效率,并考察了可见光光催化还原Cr(Ⅵ)的性能.结果表明,制得的复合光催化剂在光照 60 min后对Cr(Ⅵ)的去除率可达 100%,是纯NH2-MIL-125(Ti)的 2.5 倍.这归因于具有良好导电性的Ti3C2 纳米片为光生载流子提供了一个快速通道,加速了复合材料中电子的传输和迁移.
Abstract
Constructing heterojunctions to promote photogenerated charge separation is an effective way to enhance the photocatalytic activity of semiconductors.In this research,Ti3C2/NH2-MIL-125(Ti)composite photocatalyst is produced by introducing Ti3C2 into the synthesis of NH2-MIL-125(Ti)via a one-step solvothermal method,and the effects of Ti3C2 on the crystalline structure and morphology of NH2-MIL-125(Ti)and the separation efficiency of its photogenerated carriers are investigated by using X-ray diffraction,scanning electron microscopy,photoluminescence spectrograms,photocurrent response.And the visible light photocatalytic reduction of Cr(VI)performance is investigated.It is shown that the removal rate of Cr(Ⅵ)can reach 100%after 60 min of illumination by the composite photocatalyst,which is 2.5 times higher than that of pure NH2-MIL-125(Ti).This is attributed to the fact that Ti3C2 nanosheets with good electrical conductivity provide a fast channel for photogenerated carriers,accelerating the transport and migration of electrons in the composite.
关键词
异质结/Ti3C2/NH2-MIL-125(Ti)/复合光催化剂/光催化还原Cr(Ⅵ)Key words
heterojunction/Ti3C2/NH2-MIL-125(Ti)/composite photocatalysts/photocatalytic reduction of Cr(Ⅵ)引用本文复制引用
基金项目
山东省本科教学改革研究项目(M2020125)
教育部产学合作协同育人项目(220604903083837)
德州市科技计划(2022dzkj006)
德州学院大学生创新创业训练计划(S202310448025)
德州学院科学研究基金(2019xgrc07)
出版年
2024
NETL
NSTL
万方数据