Wei Yee Low, Fuei Pien Chee, Norini Tahir, Nur Amira Solehah Pungut, Mohd Hafiz Abd Majid, Rachel Fran Mansa, Siow Hwa Teo, Pak Yan Moh
{"title":"MIL-125-NH2/MIL-88-NH2复合材料作为一种双功能吸附剂，具有增强的光催化和光fenton -like行为去除水中有机污染物","authors":"Wei Yee Low, Fuei Pien Chee, Norini Tahir, Nur Amira Solehah Pungut, Mohd Hafiz Abd Majid, Rachel Fran Mansa, Siow Hwa Teo, Pak Yan Moh","doi":"10.1007/s11051-025-06408-w","DOIUrl":null,"url":null,"abstract":"<div><p>Metal–organic frameworks are nanoporous materials extensively studied for post-synthesis modification due to their exceptional adsorption and photocatalytic properties. However, their practical application is often limited by rapid electron–hole recombination, suboptimal band gap energies, and poor chemical and physical stability, limiting their reusability as adsorbents or photocatalysts. In this study, a novel <i>Z</i>-scheme MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite was synthesized via reflux heating method. The composite demonstrated improved thermal stability compared to MIL-125-NH<sub>2</sub> and a higher surface area than MIL-88-NH<sub>2</sub>, improving the physical and chemical properties. It selectively adsorbed cationic pollutants, following Langmuir isotherm with monolayer adsorption and physisorption mechanisms achieving a maximum adsorption capacity of 249 mg/g towards methylene blue (MB). Photocatalytic degradation of MB under visible and UV-A light irradiation reached 61% (<i>k</i><sub>1</sub> = 0.0067 min<sup>−1</sup>) and 69% (<i>k</i><sub>1</sub> = 0.0087 min<sup>−1</sup>), respectively. The addition of 1 mM hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), tripling MB removal to 89% removal (<i>k</i><sub>1</sub> = 0.0155 min<sup>−1</sup>) under visible light and 94% removal (<i>k</i><sub>1</sub> = 0.0217 min<sup>−1</sup>) under UV-A light. The synergistic effect of MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite surpassed MIL-125-NH<sub>2</sub>/H<sub>2</sub>O<sub>2</sub>/UV-A (<i>k</i><sub>1</sub> = 0.0024 min<sup>−1</sup>) and MIL-88-NH<sub>2</sub>/H<sub>2</sub>O<sub>2</sub>/UV-A (<i>k</i><sub>1</sub> = 0.0150 min<sup>−1</sup>). Scavenger experiments identified hole (<i>h</i><sup>+</sup>) and electron (<i>e</i><sup>−</sup>) were the primary active species while hydroxyl radical (·OH) and superoxide (·O<sub>2</sub><sup>−</sup>) also played key roles, with their generation further amplified by H<sub>2</sub>O<sub>2</sub>. These findings demonstrate the enhanced photocatalytic performance of the MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite, attributed to its Z-scheme heterojunction structure and photo-Fenton-like behavior. The composite exhibits a promising stability and capability in advanced water treatment applications.</p><h3>Graphical Abstract</h3><p>Schematic illustration of the photocatalytic mechanism of MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite under visible and UV-A light with H<sub>2</sub>O<sub>2</sub> activation.</p>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"27 8","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11051-025-06408-w.pdf","citationCount":"0","resultStr":"{\"title\":\"MIL-125-NH2/MIL-88-NH2 composite as a dual-function adsorbent with enhanced photocatalytic and photo-Fenton-like behavior for the removal of organic pollutant in water\",\"authors\":\"Wei Yee Low, Fuei Pien Chee, Norini Tahir, Nur Amira Solehah Pungut, Mohd Hafiz Abd Majid, Rachel Fran Mansa, Siow Hwa Teo, Pak Yan Moh\",\"doi\":\"10.1007/s11051-025-06408-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Metal–organic frameworks are nanoporous materials extensively studied for post-synthesis modification due to their exceptional adsorption and photocatalytic properties. However, their practical application is often limited by rapid electron–hole recombination, suboptimal band gap energies, and poor chemical and physical stability, limiting their reusability as adsorbents or photocatalysts. In this study, a novel <i>Z</i>-scheme MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite was synthesized via reflux heating method. The composite demonstrated improved thermal stability compared to MIL-125-NH<sub>2</sub> and a higher surface area than MIL-88-NH<sub>2</sub>, improving the physical and chemical properties. It selectively adsorbed cationic pollutants, following Langmuir isotherm with monolayer adsorption and physisorption mechanisms achieving a maximum adsorption capacity of 249 mg/g towards methylene blue (MB). Photocatalytic degradation of MB under visible and UV-A light irradiation reached 61% (<i>k</i><sub>1</sub> = 0.0067 min<sup>−1</sup>) and 69% (<i>k</i><sub>1</sub> = 0.0087 min<sup>−1</sup>), respectively. The addition of 1 mM hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), tripling MB removal to 89% removal (<i>k</i><sub>1</sub> = 0.0155 min<sup>−1</sup>) under visible light and 94% removal (<i>k</i><sub>1</sub> = 0.0217 min<sup>−1</sup>) under UV-A light. The synergistic effect of MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite surpassed MIL-125-NH<sub>2</sub>/H<sub>2</sub>O<sub>2</sub>/UV-A (<i>k</i><sub>1</sub> = 0.0024 min<sup>−1</sup>) and MIL-88-NH<sub>2</sub>/H<sub>2</sub>O<sub>2</sub>/UV-A (<i>k</i><sub>1</sub> = 0.0150 min<sup>−1</sup>). Scavenger experiments identified hole (<i>h</i><sup>+</sup>) and electron (<i>e</i><sup>−</sup>) were the primary active species while hydroxyl radical (·OH) and superoxide (·O<sub>2</sub><sup>−</sup>) also played key roles, with their generation further amplified by H<sub>2</sub>O<sub>2</sub>. These findings demonstrate the enhanced photocatalytic performance of the MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite, attributed to its Z-scheme heterojunction structure and photo-Fenton-like behavior. The composite exhibits a promising stability and capability in advanced water treatment applications.</p><h3>Graphical Abstract</h3><p>Schematic illustration of the photocatalytic mechanism of MIL-125-NH<sub>2</sub>/MIL-88-NH<sub>2</sub> composite under visible and UV-A light with H<sub>2</sub>O<sub>2</sub> activation.</p>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":653,\"journal\":{\"name\":\"Journal of Nanoparticle Research\",\"volume\":\"27 8\",\"pages\":\"\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-08-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s11051-025-06408-w.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Nanoparticle Research\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11051-025-06408-w\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoparticle Research","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11051-025-06408-w","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
MIL-125-NH2/MIL-88-NH2 composite as a dual-function adsorbent with enhanced photocatalytic and photo-Fenton-like behavior for the removal of organic pollutant in water
Metal–organic frameworks are nanoporous materials extensively studied for post-synthesis modification due to their exceptional adsorption and photocatalytic properties. However, their practical application is often limited by rapid electron–hole recombination, suboptimal band gap energies, and poor chemical and physical stability, limiting their reusability as adsorbents or photocatalysts. In this study, a novel Z-scheme MIL-125-NH2/MIL-88-NH2 composite was synthesized via reflux heating method. The composite demonstrated improved thermal stability compared to MIL-125-NH2 and a higher surface area than MIL-88-NH2, improving the physical and chemical properties. It selectively adsorbed cationic pollutants, following Langmuir isotherm with monolayer adsorption and physisorption mechanisms achieving a maximum adsorption capacity of 249 mg/g towards methylene blue (MB). Photocatalytic degradation of MB under visible and UV-A light irradiation reached 61% (k1 = 0.0067 min−1) and 69% (k1 = 0.0087 min−1), respectively. The addition of 1 mM hydrogen peroxide (H2O2), tripling MB removal to 89% removal (k1 = 0.0155 min−1) under visible light and 94% removal (k1 = 0.0217 min−1) under UV-A light. The synergistic effect of MIL-125-NH2/MIL-88-NH2 composite surpassed MIL-125-NH2/H2O2/UV-A (k1 = 0.0024 min−1) and MIL-88-NH2/H2O2/UV-A (k1 = 0.0150 min−1). Scavenger experiments identified hole (h+) and electron (e−) were the primary active species while hydroxyl radical (·OH) and superoxide (·O2−) also played key roles, with their generation further amplified by H2O2. These findings demonstrate the enhanced photocatalytic performance of the MIL-125-NH2/MIL-88-NH2 composite, attributed to its Z-scheme heterojunction structure and photo-Fenton-like behavior. The composite exhibits a promising stability and capability in advanced water treatment applications.
Graphical Abstract
Schematic illustration of the photocatalytic mechanism of MIL-125-NH2/MIL-88-NH2 composite under visible and UV-A light with H2O2 activation.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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