Nd/MnO2 Bio-nanomaterial: Synergistic Enhancement of Antimicrobial Activity and Photocatalytic Dye Degradation

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-09-27 DOI:10.1007/s10562-025-05171-w

Divya T, Prashanna Suvaitha S, Niveditha S, Venkatachalam K

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引用次数: 0

Abstract

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

Abstract Image

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Nd/MnO2生物纳米材料：协同增强抗菌活性和光催化降解染料

染料污染废水和耐药细菌对环境和健康构成了紧迫的挑战。具有光催化和抗菌特性的多功能纳米材料提供了一种可持续的解决方案。本研究通过绿色方法合成了掺钕二氧化锰（Nd/MnO2）纳米颗粒，并对其结构、光学、光催化和抗菌性能进行了评价。以水芋叶提取物为封盖稳定剂，合成了Nd/MnO2。表征方法包括XRD（四方α-MnO2， Nd掺杂后晶粒尺寸从13.9 nm降至12.5 nm）、FT-IR （O -Mn - O在464 cm-1处拉伸强度降低）、TGA（稳定性高达1000℃）、DRS UV-Vis（红移323→327 nm；带隙2.6→2.3 eV）、FESEM/TEM（分级纳米花，~ 28.5 nm）、EDX/mapping （Nd、Mn、O均匀分布，Nd 2.2 wt%）和XPS。在可见光下，Nd/MnO2在120 min内降解刚果红（84.52%）、鲜绿（88.18%）和尼罗蓝A(82.98%)，符合准一级动力学。抗菌试验显示对金黄色葡萄球菌有较强的抑菌带，抑菌带最高（23 mm）。绿色合成的Nd/MnO2纳米颗粒具有高结晶度、热稳定性、增强的可见光吸收和协同光催化-抗菌活性，在纺织染料废水的修复和抗菌应用中具有广阔的前景。nd /MnO2纳米颗粒具有双重功能：光催化降解和抗菌活性

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

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.