Divya T, Prashanna Suvaitha S, Niveditha S, Venkatachalam K
{"title":"Nd/MnO2生物纳米材料：协同增强抗菌活性和光催化降解染料","authors":"Divya T, Prashanna Suvaitha S, Niveditha S, Venkatachalam K","doi":"10.1007/s10562-025-05171-w","DOIUrl":null,"url":null,"abstract":"<div><p>Dye-polluted wastewater and antibiotic-resistant bacteria present urgent environmental and health challenges. Multifunctional nanomaterials with both photocatalytic and antibacterial properties offer a sustainable solution. This study biosynthesized neodymium-doped manganese dioxide (Nd/MnO<sub>2</sub>) nanoparticles via a green method and evaluated their structural, optical, photocatalytic, and antibacterial performance. Nd/MnO<sub>2</sub> was synthesized using <i>Adenanthera pavonina L.</i> leaf extract as a capping and stabilizing agent. Characterization included XRD (tetragonal α-MnO<sub>2</sub>, crystallite size reduced from 13.9 To 12.5 nm after Nd doping), FT-IR (O–Mn–O stretching at 464 cm<sup>-1</sup> with reduced intensity), TGA (stability up To 1000 °C), DRS UV–Vis (red shift 323→327 nm; band gap 2.6→2.3 eV), FESEM/TEM (hierarchical nanoflowers, ~ 28.5 nm size), EDX/mapping (uniform Nd, Mn, O distribution, Nd 2.2 wt%), and XPS. Under visible light, Nd/MnO<sub>2</sub> degraded Congo red (84.52%), Brilliant green (88.18%), and Nile blue A (82.98%) within 120 min, following pseudo-first-order kinetics. Antibacterial testing revealed strong inhibition zones, with the highest (23 mm) against <i>Staphylococcus aureus</i>. Green-synthesized Nd/MnO<sub>2</sub> nanoparticles show high crystallinity, thermal stability, enhanced visible-light absorption, and synergistic photocatalytic–antibacterial activity, making them promising for textile dye wastewater remediation and antimicrobial applications. </p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Nd/MnO<sub>2</sub> Nanoparticles Exhibiting Dual Functionalities: Photocatalytic Degradation and Antibacterial Activity</p></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 11","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nd/MnO2 Bio-nanomaterial: Synergistic Enhancement of Antimicrobial Activity and Photocatalytic Dye Degradation\",\"authors\":\"Divya T, Prashanna Suvaitha S, Niveditha S, Venkatachalam K\",\"doi\":\"10.1007/s10562-025-05171-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Dye-polluted wastewater and antibiotic-resistant bacteria present urgent environmental and health challenges. Multifunctional nanomaterials with both photocatalytic and antibacterial properties offer a sustainable solution. This study biosynthesized neodymium-doped manganese dioxide (Nd/MnO<sub>2</sub>) nanoparticles via a green method and evaluated their structural, optical, photocatalytic, and antibacterial performance. Nd/MnO<sub>2</sub> was synthesized using <i>Adenanthera pavonina L.</i> leaf extract as a capping and stabilizing agent. Characterization included XRD (tetragonal α-MnO<sub>2</sub>, crystallite size reduced from 13.9 To 12.5 nm after Nd doping), FT-IR (O–Mn–O stretching at 464 cm<sup>-1</sup> with reduced intensity), TGA (stability up To 1000 °C), DRS UV–Vis (red shift 323→327 nm; band gap 2.6→2.3 eV), FESEM/TEM (hierarchical nanoflowers, ~ 28.5 nm size), EDX/mapping (uniform Nd, Mn, O distribution, Nd 2.2 wt%), and XPS. Under visible light, Nd/MnO<sub>2</sub> degraded Congo red (84.52%), Brilliant green (88.18%), and Nile blue A (82.98%) within 120 min, following pseudo-first-order kinetics. Antibacterial testing revealed strong inhibition zones, with the highest (23 mm) against <i>Staphylococcus aureus</i>. Green-synthesized Nd/MnO<sub>2</sub> nanoparticles show high crystallinity, thermal stability, enhanced visible-light absorption, and synergistic photocatalytic–antibacterial activity, making them promising for textile dye wastewater remediation and antimicrobial applications. </p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Nd/MnO<sub>2</sub> Nanoparticles Exhibiting Dual Functionalities: Photocatalytic Degradation and Antibacterial Activity</p></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 11\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05171-w\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05171-w","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Nd/MnO2 Bio-nanomaterial: Synergistic Enhancement of Antimicrobial Activity and Photocatalytic Dye Degradation
Dye-polluted wastewater and antibiotic-resistant bacteria present urgent environmental and health challenges. Multifunctional nanomaterials with both photocatalytic and antibacterial properties offer a sustainable solution. This study biosynthesized neodymium-doped manganese dioxide (Nd/MnO2) nanoparticles via a green method and evaluated their structural, optical, photocatalytic, and antibacterial performance. Nd/MnO2 was synthesized using Adenanthera pavonina L. leaf extract as a capping and stabilizing agent. Characterization included XRD (tetragonal α-MnO2, crystallite size reduced from 13.9 To 12.5 nm after Nd doping), FT-IR (O–Mn–O stretching at 464 cm-1 with reduced intensity), TGA (stability up To 1000 °C), DRS UV–Vis (red shift 323→327 nm; band gap 2.6→2.3 eV), FESEM/TEM (hierarchical nanoflowers, ~ 28.5 nm size), EDX/mapping (uniform Nd, Mn, O distribution, Nd 2.2 wt%), and XPS. Under visible light, Nd/MnO2 degraded Congo red (84.52%), Brilliant green (88.18%), and Nile blue A (82.98%) within 120 min, following pseudo-first-order kinetics. Antibacterial testing revealed strong inhibition zones, with the highest (23 mm) against Staphylococcus aureus. Green-synthesized Nd/MnO2 nanoparticles show high crystallinity, thermal stability, enhanced visible-light absorption, and synergistic photocatalytic–antibacterial activity, making them promising for textile dye wastewater remediation and antimicrobial applications.
Graphical Abstract
Nd/MnO2 Nanoparticles Exhibiting Dual Functionalities: Photocatalytic Degradation and Antibacterial Activity
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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