Fe-doped NH2-MIL-125(Ti) for enhanced photo-oxidation/reduction properties

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Structure Pub Date : 2025-02-26 DOI:10.1016/j.molstruc.2025.141844

Chao-Wei Luo , Hao-Hua Huang , Xiong Jie , Di-Yang Peng , Chao-Rong Chen , Hong-Yan Zeng

{"title":"Fe-doped NH2-MIL-125(Ti) for enhanced photo-oxidation/reduction properties","authors":"Chao-Wei Luo , Hao-Hua Huang , Xiong Jie , Di-Yang Peng , Chao-Rong Chen , Hong-Yan Zeng","doi":"10.1016/j.molstruc.2025.141844","DOIUrl":null,"url":null,"abstract":"<div><div>To improve the light-harvesting capability and electron-hole separation efficiency, a novel Fe-doped NH<sub>2</sub>-MIL-125(Ti) (Fe-MOF(Ti)) photocatalyst was prepared via one-step solvothermal method. The band structure, light-absorption capacity and photocatalytic performances of the Fe-MOF(Ti) were improved by adjusting the Fe-doping amount in the NH<sub>2</sub>-MIL-125(Ti). The moderate Fe-doping facilitated the visible-light capture and separation of photogenerated charge carriers, contributing to the photocatalytic activity for Cr(VI) reduction and methyl orange (MO) degradation under visible-light. As expected, the optimal Fe<sub>3.0</sub>-MOF(Ti) signified enhanced photooxidation-reduction properties in the absent of additives, which Cr(VI) reduction and MO degradation efficiencies were 1.5 and 1.2 times than those of the pristine NH<sub>2</sub>-MIL-125(Ti). Furthermore, the possible photocatalytic mechanisms for Cr(VI) reduction and MO degradation over the Fe-MOF(Ti) were proposed, respectively. The present work paved a way to design and prepare high-performance MOF-based photocatalysts for environmental remediation.</div></div>","PeriodicalId":16414,"journal":{"name":"Journal of Molecular Structure","volume":"1334 ","pages":"Article 141844"},"PeriodicalIF":4.0000,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Structure","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022286025005307","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

To improve the light-harvesting capability and electron-hole separation efficiency, a novel Fe-doped NH₂-MIL-125(Ti) (Fe-MOF(Ti)) photocatalyst was prepared via one-step solvothermal method. The band structure, light-absorption capacity and photocatalytic performances of the Fe-MOF(Ti) were improved by adjusting the Fe-doping amount in the NH₂-MIL-125(Ti). The moderate Fe-doping facilitated the visible-light capture and separation of photogenerated charge carriers, contributing to the photocatalytic activity for Cr(VI) reduction and methyl orange (MO) degradation under visible-light. As expected, the optimal Fe_3.0-MOF(Ti) signified enhanced photooxidation-reduction properties in the absent of additives, which Cr(VI) reduction and MO degradation efficiencies were 1.5 and 1.2 times than those of the pristine NH₂-MIL-125(Ti). Furthermore, the possible photocatalytic mechanisms for Cr(VI) reduction and MO degradation over the Fe-MOF(Ti) were proposed, respectively. The present work paved a way to design and prepare high-performance MOF-based photocatalysts for environmental remediation.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

为了提高光收集能力和电子-空穴分离效率，通过一步溶热法制备了一种新型的掺Fe NH2-MIL-125(Ti)（Fe-MOF(Ti)）光催化剂。通过调节 NH2-MIL-125(Ti)中的铁掺杂量，Fe-MOF(Ti)的能带结构、光吸收能力和光催化性能都得到了改善。适度的 Fe 掺杂有利于可见光捕获和分离光生电荷载流子，从而提高了可见光下还原 Cr(VI) 和降解甲基橙 (MO) 的光催化活性。正如预期的那样，在没有添加剂的情况下，最佳的 Fe3.0-MOF(Ti) 具有更强的光氧化还原特性，其六价铬还原效率和 MO 降解效率分别是原始 NH2-MIL-125(Ti) 的 1.5 倍和 1.2 倍。此外，还分别提出了Fe-MOF(Ti)降解Cr(VI)和MO的可能光催化机制。本研究为设计和制备用于环境修复的高性能 MOF 基光催化剂铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.