双金属NH2-MOF（InxFe1−x）同时光催化去除Cr（VI）和As（III）的协同效应

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-02-08 DOI:10.1016/j.apsusc.2025.162659

Xin Zhong, Jing Xu, Sijia Song

{"title":"双金属NH2-MOF（InxFe1−x）同时光催化去除Cr（VI）和As（III）的协同效应","authors":"Xin Zhong, Jing Xu, Sijia Song","doi":"10.1016/j.apsusc.2025.162659","DOIUrl":null,"url":null,"abstract":"<div><div>This work revealed that NH2-MIL-68(In) was ineffective for the removal of Cr(VI) by adsorption and photocatalytic reduction, and NH2-MIL-88B(Fe) had almost no effect on the photocatalytic oxidation of As(III). With the increase of Fe3+ doping concentration, the removal of Cr(VI) by adsorption-photoreduction and As(III) by photo-oxidation obviously increased. Amongst, NH2-MOF(In0.2Fe0.8) exhibited the best photocatalytic performance, with total removal rates of 71.75 % for Cr(VI) and 46.64 % for As(III), and the total removal amounts of Cr(VI) and As(III) were 10.62 mg/g and 3.54 mg/g, respectively. Besides, the photoreduction of Cr(VI) by NH2-MOF(In0.2Fe0.8) was about 2.4 times higher than that of NH2-MIL-68(In), and the photo-oxidation of As(III) was 1.59 and 1.67 times higher than that of NH2-MIL-88B(Fe) and NH2-MIL-68(In), respectively. Owing to the modulation between In and Fe ions, the synergistic effect of ligand-to-metal and metal-to-metal charge transfer contributed to the dissociation of e−-h+ pairs, rapid charge migration, which improved the photocatalytic efficiency. In addition, –NH2 were the critical reaction sites for metal adsorption-photoreduction, which served as a dual donor of protons and electrons during Cr(VI) adsorption and photoreduction. Eventually, quenching experiments and EPR spectra indicated that e−, h+, •OH and •O2− were the main active species.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"690 ","pages":"Article 162659"},"PeriodicalIF":6.3000,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and As(III) by bimetallic NH2-MOF(InxFe1−x)\",\"authors\":\"Xin Zhong, Jing Xu, Sijia Song\",\"doi\":\"10.1016/j.apsusc.2025.162659\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This work revealed that NH2-MIL-68(In) was ineffective for the removal of Cr(VI) by adsorption and photocatalytic reduction, and NH2-MIL-88B(Fe) had almost no effect on the photocatalytic oxidation of As(III). With the increase of Fe3+ doping concentration, the removal of Cr(VI) by adsorption-photoreduction and As(III) by photo-oxidation obviously increased. Amongst, NH2-MOF(In0.2Fe0.8) exhibited the best photocatalytic performance, with total removal rates of 71.75 % for Cr(VI) and 46.64 % for As(III), and the total removal amounts of Cr(VI) and As(III) were 10.62 mg/g and 3.54 mg/g, respectively. Besides, the photoreduction of Cr(VI) by NH2-MOF(In0.2Fe0.8) was about 2.4 times higher than that of NH2-MIL-68(In), and the photo-oxidation of As(III) was 1.59 and 1.67 times higher than that of NH2-MIL-88B(Fe) and NH2-MIL-68(In), respectively. Owing to the modulation between In and Fe ions, the synergistic effect of ligand-to-metal and metal-to-metal charge transfer contributed to the dissociation of e−-h+ pairs, rapid charge migration, which improved the photocatalytic efficiency. In addition, –NH2 were the critical reaction sites for metal adsorption-photoreduction, which served as a dual donor of protons and electrons during Cr(VI) adsorption and photoreduction. Eventually, quenching experiments and EPR spectra indicated that e−, h+, •OH and •O2− were the main active species.</div></div>\",\"PeriodicalId\":247,\"journal\":{\"name\":\"Applied Surface Science\",\"volume\":\"690 \",\"pages\":\"Article 162659\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-02-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Surface Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0169433225003733\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169433225003733","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

摘要

研究表明，NH2-MIL-68（In）对吸附光催化还原Cr（VI）无效，NH2-MIL-88B（Fe）对光催化氧化As（III）几乎没有影响。随着Fe3+掺杂浓度的增加，吸附光还原法对Cr（VI）的去除率和光氧化法对As（III）的去除率明显增加。其中，NH2-MOF（In0.2Fe0.8）表现出最好的光催化性能，对Cr（VI）和As（III）的总去除率分别为71.75 %和46.64 %，对Cr（VI）和As（III）的总去除率分别为10.62 mg/g和3.54 mg/g。此外，NH2-MOF（In0.2Fe0.8）对Cr（VI）的光还原能力是NH2-MIL-68（In）的2.4倍左右，对As（III）的光氧化能力分别是NH2-MIL-88B（Fe）和NH2-MIL-68（In）的1.59倍和1.67倍。由于In和Fe离子之间的调制作用，配体到金属和金属到金属的电荷转移的协同效应有助于e−-h+对的解离，快速的电荷迁移，从而提高光催化效率。此外，-NH2是金属吸附-光还原的关键反应位点，在Cr（VI）吸附和光还原过程中充当质子和电子的双重供体。最后，淬火实验和EPR光谱表明，e−、h+、•OH和•O2−是主要的活性物质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and As(III) by bimetallic NH2-MOF(InxFe1−x)

查看原文本刊更多论文

Synergistic effects in simultaneous photocatalytic removal of Cr(VI) and As(III) by bimetallic NH2-MOF(InxFe1−x)

This work revealed that NH₂-MIL-68(In) was ineffective for the removal of Cr(VI) by adsorption and photocatalytic reduction, and NH₂-MIL-88B(Fe) had almost no effect on the photocatalytic oxidation of As(III). With the increase of Fe³⁺ doping concentration, the removal of Cr(VI) by adsorption-photoreduction and As(III) by photo-oxidation obviously increased. Amongst, NH₂-MOF(In_0.2Fe_0.8) exhibited the best photocatalytic performance, with total removal rates of 71.75 % for Cr(VI) and 46.64 % for As(III), and the total removal amounts of Cr(VI) and As(III) were 10.62 mg/g and 3.54 mg/g, respectively. Besides, the photoreduction of Cr(VI) by NH₂-MOF(In_0.2Fe_0.8) was about 2.4 times higher than that of NH₂-MIL-68(In), and the photo-oxidation of As(III) was 1.59 and 1.67 times higher than that of NH₂-MIL-88B(Fe) and NH₂-MIL-68(In), respectively. Owing to the modulation between In and Fe ions, the synergistic effect of ligand-to-metal and metal-to-metal charge transfer contributed to the dissociation of e⁻-h⁺ pairs, rapid charge migration, which improved the photocatalytic efficiency. In addition, –NH₂ were the critical reaction sites for metal adsorption-photoreduction, which served as a dual donor of protons and electrons during Cr(VI) adsorption and photoreduction. Eventually, quenching experiments and EPR spectra indicated that e⁻, h⁺, •OH and •O₂⁻ were the main active species.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.