{"title":"Mn对BiFeO3纳米颗粒可见光催化活性的影响","authors":"Ranjith Anburaja, Kaleemulla Shaik","doi":"10.1007/s10971-025-06798-2","DOIUrl":null,"url":null,"abstract":"<div><p>Multiferroic nanoparticles are extensively studied as they exhibit ferroelectricity, ferromagnetism and ferro-elasticity in a single-phase material. These nanoparticles play an important role in multifunctional and eco-friendly devices. The present manuscript deals with the synthesis of manganese (Mn) doped bismuth ferrite (Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub>) nanoparticles at 0 ≤ <i>x</i> ≤ 0.1 using a sol-gel auto combustion method. The role of manganese (Mn) concentration on structural, optical, magnetic and dielectric properties was investigated. More importantly, the role of Mn concentration on visible light photocatalytic application was explained in detail. The XRD results confirmed the rhombohedral (0 ≤ <i>x</i> ≤ 0.07) and tetragonal structures (<i>x</i> ≥ 0.1) of Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles. The Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles exhibited high optical response (absorbance) in the visible region which increased with increasing Mn concentration. A decrease in optical band gap (E<sub>g</sub>) was noted from 2.1 eV to 1.36 eV with increasing Mn concentration (0 ≤ <i>x</i> ≤ 0.10). The magnetic properties were studied at room temperature (300 K) by applying an external magnetic field of ±15 kOe. The Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles exhibited paramagnetic (0 ≤ <i>x</i> ≤ 0.05) and ferromagnetic (<i>x</i> > 0.05) behaviours with increasing Mn concentration. Dielectric measurements were carried out at room temperature by varying frequency. An increase in dielectric loss was observed with increasing Mn concentration. The visible light photo catalytic activity of Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles was investigated using Rhodamine B dye and enhanced photo catalytic degradation activity was observed with increase of Mn concentration.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"115 3","pages":"1079 - 1095"},"PeriodicalIF":3.2000,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Role of Mn on visible light photocatalytic activity of BiFeO3 nanoparticles\",\"authors\":\"Ranjith Anburaja, Kaleemulla Shaik\",\"doi\":\"10.1007/s10971-025-06798-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Multiferroic nanoparticles are extensively studied as they exhibit ferroelectricity, ferromagnetism and ferro-elasticity in a single-phase material. These nanoparticles play an important role in multifunctional and eco-friendly devices. The present manuscript deals with the synthesis of manganese (Mn) doped bismuth ferrite (Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub>) nanoparticles at 0 ≤ <i>x</i> ≤ 0.1 using a sol-gel auto combustion method. The role of manganese (Mn) concentration on structural, optical, magnetic and dielectric properties was investigated. More importantly, the role of Mn concentration on visible light photocatalytic application was explained in detail. The XRD results confirmed the rhombohedral (0 ≤ <i>x</i> ≤ 0.07) and tetragonal structures (<i>x</i> ≥ 0.1) of Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles. The Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles exhibited high optical response (absorbance) in the visible region which increased with increasing Mn concentration. A decrease in optical band gap (E<sub>g</sub>) was noted from 2.1 eV to 1.36 eV with increasing Mn concentration (0 ≤ <i>x</i> ≤ 0.10). The magnetic properties were studied at room temperature (300 K) by applying an external magnetic field of ±15 kOe. The Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles exhibited paramagnetic (0 ≤ <i>x</i> ≤ 0.05) and ferromagnetic (<i>x</i> > 0.05) behaviours with increasing Mn concentration. Dielectric measurements were carried out at room temperature by varying frequency. An increase in dielectric loss was observed with increasing Mn concentration. The visible light photo catalytic activity of Bi<sub>1-x</sub>Mn<sub>x</sub>FeO<sub>3</sub> nanoparticles was investigated using Rhodamine B dye and enhanced photo catalytic degradation activity was observed with increase of Mn concentration.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":664,\"journal\":{\"name\":\"Journal of Sol-Gel Science and Technology\",\"volume\":\"115 3\",\"pages\":\"1079 - 1095\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-05-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sol-Gel Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10971-025-06798-2\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06798-2","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Role of Mn on visible light photocatalytic activity of BiFeO3 nanoparticles
Multiferroic nanoparticles are extensively studied as they exhibit ferroelectricity, ferromagnetism and ferro-elasticity in a single-phase material. These nanoparticles play an important role in multifunctional and eco-friendly devices. The present manuscript deals with the synthesis of manganese (Mn) doped bismuth ferrite (Bi1-xMnxFeO3) nanoparticles at 0 ≤ x ≤ 0.1 using a sol-gel auto combustion method. The role of manganese (Mn) concentration on structural, optical, magnetic and dielectric properties was investigated. More importantly, the role of Mn concentration on visible light photocatalytic application was explained in detail. The XRD results confirmed the rhombohedral (0 ≤ x ≤ 0.07) and tetragonal structures (x ≥ 0.1) of Bi1-xMnxFeO3 nanoparticles. The Bi1-xMnxFeO3 nanoparticles exhibited high optical response (absorbance) in the visible region which increased with increasing Mn concentration. A decrease in optical band gap (Eg) was noted from 2.1 eV to 1.36 eV with increasing Mn concentration (0 ≤ x ≤ 0.10). The magnetic properties were studied at room temperature (300 K) by applying an external magnetic field of ±15 kOe. The Bi1-xMnxFeO3 nanoparticles exhibited paramagnetic (0 ≤ x ≤ 0.05) and ferromagnetic (x > 0.05) behaviours with increasing Mn concentration. Dielectric measurements were carried out at room temperature by varying frequency. An increase in dielectric loss was observed with increasing Mn concentration. The visible light photo catalytic activity of Bi1-xMnxFeO3 nanoparticles was investigated using Rhodamine B dye and enhanced photo catalytic degradation activity was observed with increase of Mn concentration.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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