IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-02-02 DOI: 10.1016/j.poly.2026.117980

Luciano Salas , Benjamín Villalobos , Plinio Cantero-López , Ariel Herrera-Vásquez , Verónica Paredes-García , Carlos Cruz

We report the synthesis, structural elucidation, and bioactivity assessment of a novel series of isostructural coordination complexes, M-PBT, with the general formula [M(PBT)₂(hfac)₂] (M = Mn, Fe, Co, Ni, Cu, Zn), incorporating 2-(pyridin-4-yl)-1,3-benzothiazole (PBT) and hexafluoroacetylacetonate (hfac⁻) ligands. Single-crystal X-ray diffraction reveals that all complexes crystallize in the triclinic P-1 space group, featuring a trans-octahedral MN₂O₄ coordination geometry, where PBT ligands occupy axial positions and hfac⁻ ligands coordinate in the equatorial plane. Comparative structural analysis highlights systematic trends in bond lengths and octahedral distortion parameters across the 3d metal series. Hirshfeld surface analysis and 2D fingerprint plots underscore the key role of directional supramolecular interactions, namely C–H···F non-classical hydrogen bonds, F···F contacts, and π–π stacking, in stabilizing the three-dimensional crystal packing. Theoretical studies corroborate structural findings. Biological assays using Arabidopsis thaliana and Pseudomonas syringae reveal metal-dependent inhibitory effects on plant growth and bacterial proliferation. These results demonstrate that rational selection of metal centers and ligand frameworks can modulate the physicochemical and bioactive properties of coordination complexes, with broader implications for supramolecular design and bioinorganic chemistry.

我们报道了一种新型同结构配合物M-PBT的合成、结构解析和生物活性评价，其通式为[M(PBT) 2 (hfac) 2] (M = Mn, Fe, Co, Ni, Cu, Zn)，含有2-（吡啶-4-基）-1,3-苯并噻唑（PBT）和六氟乙酰丙酮（hfac -）配体。x -射线单晶衍射表明，所有配合物均在三斜P-1空间群中结晶，具有反八面体MN₂O₄配位几何，其中PBT配体位于轴向位置，hfac -配体位于赤道平面。对比结构分析强调了键长和八面体畸变参数在三维金属系列中的系统趋势。Hirshfeld表面分析和二维指纹图谱强调了定向超分子相互作用（即C-H··F非经典氢键、F··F接触和π -π堆积）在稳定三维晶体堆积中的关键作用。理论研究证实了结构上的发现。利用拟南芥和丁香假单胞菌进行的生物学试验揭示了金属对植物生长和细菌增殖的依赖抑制作用。这些结果表明，金属中心和配体框架的合理选择可以调节配合物的物理化学和生物活性，对超分子设计和生物无机化学具有更广泛的意义。

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引用次数: 0

Selective americium recovery from high level waste: demonstration of hydrophilic BTP enabled 1-cycle actinide partitioning 从高放射性废物中选择性回收镅：亲水性BTP实现1周期锕系元素分配的演示

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-02-01 DOI: 10.1016/j.poly.2026.118005

D.B. Sharma , S.A. Ansari , A. Bhattacharyya

This work presents a study on the separation of americium (Am) and europium (Eu) from simulated high-level waste (HLW) using a dual-solvent approach. TODGA (N,N,N′,N′-tetraoctyl diglycolamide) was employed as the extractant, while the sulphonated bis-triazinylpyridine derivative (SO₃-Ph-BTP) served as a water-soluble selective stripping agent. The primary objective was to assess the practicality of a single-cycle actinide partitioning strategy which is increasingly recognized as a potential option for HLW management. Experiments were performed in an eight-stage mixer–settler system with 2 L of simulated HLW containing ²⁴¹Am (t_1/2 = 432 y) and ^152,154Eu (t_1/2 = 13 y). Eu was chosen as a representative of all lanthanides considering its radiochemical properties (gamma emitter) for easy quantification. More than 99.9% of both Am and Eu were transferred into the TODGA phase within four extraction stages. Subsequent stripping with SO₃-Ph-BTP led to >99.9% recovery of Am over eight stages, while Eu remained quantitatively in the organic phase. The achieved decontamination factor of ∼10³ for Am relative to Eu highlights the efficiency of this separation process. The findings demonstrate that a one-cycle Am recovery scheme is feasible, supporting the advancement of actinide–lanthanide partitioning concepts for future HLW management.

本文介绍了一种采用双溶剂方法从模拟高放废物（HLW）中分离镅（Am）和铕（Eu）的研究。以TODGA （N，N,N′，N′-四辛基二甘醇酰胺）为萃取剂，磺化双三嗪基吡啶衍生物（SO3-Ph-BTP）为水溶性选择性剥离剂。主要目的是评估单周期锕系元素分配策略的实用性，该策略越来越被认为是高放射性废物管理的潜在选择。实验在一个8级混合-沉淀系统中进行，该系统使用2l模拟高沸水，其中含有241Am （t1/2 = 432 y）和152154eu （t1/2 = 13 y）。考虑到铕的放射化学性质（γ发射器），为了便于量化，选择它作为所有镧系元素的代表。在4个萃取阶段中，Am和Eu均超过99.9%转移到TODGA阶段。随后用SO3-Ph-BTP进行溶出，在8个阶段中Am的回收率达到99.9%，而Eu仍在有机相中。Am相对于Eu获得的去污系数为~ 103，突出了该分离过程的效率。研究结果表明，单周期Am回收方案是可行的，支持了锕系元素-镧系元素分配概念在未来高浓缩铀管理中的发展。

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引用次数: 0

Water-stable cobalt(II) coordination polymer and its fluorescence turn-off sensing towards Cr₂O₇2− and 3-nitrotyrosine in aqueous solution 水稳定钴（II）配位聚合物及其对水溶液中Cr₂O₇2 -和3-硝基酪氨酸的荧光关闭感应

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-02-01 DOI: 10.1016/j.poly.2026.118008

Kun Zhang, Qing-Yun Yang, An-Ran Liu, Yi-Xuan Shi, Yang Shi, Jing Ru

In this paper, a two-dimensional Co(II) coordination polymer (CP), {[Co₂(AAPA)₂(Bix)₂(H₂O)]·2DMF}_n (designated as AAPA-Co1), was constructed using anthracene-derived organic ligand 5-((anthracen-9-ylmethyl)amino)isophthalic acid (H₂AAPA), and the auxiliary ligand 1,4-Bis(imidazole-l-ylmethyl)benzene (Bix). The synthesized AAPA-Co1 exhibited excellent thermal stability and chemical stability in aqueous solutions across varying conditions. As anticipated, fluorescence sensing studies revealed that AAPA-Co1 could function as a highly sensitive “turn-off” fluorescence sensor for Cr₂O₇²⁻ and 3-nitrotyrosine (3-NT), achieving low detection limits of 0.78 μM and 1.17 μM, respectively. Furthermore, the potential quenching reasons were also systematically investigated.

本文以蒽衍生有机配体5-（（蒽-9-甲基）氨基）间苯二甲酸（H2AAPA）和辅助配体1,4-双（咪唑-l-甲基）苯（Bix）为配体，构建了二维Co（II）配位聚合物（CP） {[Co2(AAPA)2(Bix)2(H2O)]·2DMF}n（命名为AAPA- co1）。合成的AAPA-Co1在不同条件下均表现出优异的热稳定性和化学稳定性。正如预期的那样，荧光传感研究表明，AAPA-Co1可以作为Cr₂O₇2 -和3-硝基酪氨酸（3-NT）的高灵敏度“关闭”荧光传感器，检测限分别为0.78 μM和1.17 μM。并对可能的淬火原因进行了系统的研究。

引用次数: 0

Effect of alkyl chain architecture on diglycolamide complexation with uranyl ion: Insights from spectroscopy, calorimetry, and DFT 烷基链结构对二甘醇酰胺与铀酰离子络合的影响：来自光谱学、量热学和DFT的见解

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-02-01 DOI: 10.1016/j.poly.2026.118006

Dharmendra B. Sharma , Arunasis Bhattacharyya , Amey P. Wadawale , Prasanta K. Mohapatra , Richard J.M. Egberink , Willem Verboom , Seraj A. Ansari

Diglycolamides (DGAs) are recognized as versatile ligands for actinide ions and facilitate the separation processes relevant to nuclear waste management. While DGAs with linear alkyl chains have been extensively characterized, very little is known about how the alkyl chain branching influences their coordination properties. In this study, the complexation of uranyl ions (UO₂²⁺) with three tetraalkyl DGA derivatives, namely, tetra-n-butyl (TnBDGA), tetra-sec-butyl (TsBDGA), and tetra-isobutyl (TiBDGA), was examined using UV–vis spectrophotometry, isothermal titration calorimetry, and single-crystal X-ray diffraction. The thermodynamic and spectroscopic results demonstrate that complex formation is endothermic and mainly driven by favorable entropy changes, attributed to solvent reorganization and ligand conformational effects. The order of the complex stability (TnBDGA > TsBDGA) indicates that increasing alkyl branching introduces steric constraints that weaken the complexation reaction. Structural analysis of the UO₂²⁺/TiBDGA complex reveals a tridentate coordination through the three oxygen donor atoms. These findings highlight the significant role of ligand structural variations in determining both the energetics and geometry of the uranyl/DGA interactions, providing valuable guidance for designing more efficient extractants for nuclear fuel cycle applications.

二醇酰胺（DGAs）被认为是锕系离子的多用途配体，有助于与核废料管理相关的分离过程。虽然具有线性烷基链的DGAs已经被广泛表征，但对于烷基链分支如何影响其配位性质却知之甚少。本研究采用紫外-可见分光光度法、等温滴定量热法和单晶x射线衍射法研究了铀酰离子（UO22+）与三种四烷基DGA衍生物，即四正丁基（TnBDGA）、四正丁基（TsBDGA）和四异丁基（TiBDGA）的络合作用。热力学和光谱结果表明，配合物的形成是吸热的，主要由溶剂重组和配体构象效应引起的有利熵变驱动。配合物稳定性的顺序（TnBDGA > TsBDGA）表明，增加烷基支链会引入空间约束，从而减弱配合反应。对UO22+/TiBDGA配合物的结构分析表明，该配合物通过三个给氧原子形成三叉戟配位。这些发现强调了配体结构变化在决定铀酰/DGA相互作用的能量学和几何形状方面的重要作用，为设计更有效的核燃料循环应用萃取剂提供了有价值的指导。

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引用次数: 0

Tunable synthesis of silver nanoparticles using γ-cyclodextrins: Influence of reaction parameters on morphology and colloidal stability γ-环糊精可调合成纳米银：反应参数对形貌和胶体稳定性的影响

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-01-27 DOI: 10.1016/j.poly.2026.117990

Farrah Nurkhaliza , Muhammad Ridwan , Agustina Sus Andreani

In this research, silver nanoparticles (AgNPs) were synthesized through a chemical reduction pathway using γ-cyclodextrin (γ-CDs) as both reducing and stabilizing agents. The synthesis was conducted under systematically varied parameters, including pH, concentrations of silver nitrate and γ-CD, and reaction time. The as-synthesized AgNPs were characterized using UV–Vis spectroscopy, Transmission Electron Microscopy (TEM), Particle Size Analyzer (PSA), and Fourier Transform Infrared (FTIR). The findings revealed that these synthesis conditions had a significant influence on the morphology of AgNPs. Alkaline pH, increased silver nitrate and γ-CDs concentrations, and prolonged reaction times promoted the formation of smaller and more uniform nanoparticles, as indicated by a blue shift in the surface plasmon resonance (SPR) peak. The optimum synthesis conditions were identified as pH 11, AgNO₃ 2.5 × 10⁻⁴ M, γ-CDs 0.03 M (molar ratio 1:120), and 30 min of reaction time. Under these conditions, TEM analysis showed an average particle size of 10.98 ± 1.17 nm. FTIR analysis confirmed the successful formation of AgNPs, indicated by the presence of a CO peak, suggesting a redox interaction between AgNO₃ and γ-CDs. Zeta potential measurements demonstrated that the AgNPs exhibited values below −30 mV, indicating strong electrostatic repulsion and high colloidal stability. Furthermore, the AgNPs solution remained stable after four months of storage. This work provided valuable insights into tailoring the physicochemical properties of AgNPs for specific applications by precisely controlling synthesis parameters.

本研究以γ-环糊精（γ-CDs）为还原剂和稳定剂，通过化学还原途径合成了银纳米颗粒（AgNPs）。在pH、硝酸银和γ-CD的浓度以及反应时间等参数下进行了合成。采用紫外可见光谱（UV-Vis）、透射电子显微镜（TEM）、粒度分析仪（PSA）和傅里叶变换红外（FTIR）对合成的AgNPs进行了表征。结果表明，这些合成条件对AgNPs的形貌有显著影响。碱性pH、硝酸银和γ-CDs浓度的增加以及反应时间的延长促进了更小、更均匀的纳米颗粒的形成，表面等离子体共振（SPR）峰出现蓝移。最佳合成条件为pH为11，AgNO3为2.5 × 10−4 M， γ-CDs为0.03 M（摩尔比为1:20 20），反应时间为30 min。在此条件下，TEM分析显示平均粒径为10.98±1.17 nm。FTIR分析证实AgNPs的成功形成，通过CO峰的存在表明AgNO3和γ-CDs之间存在氧化还原相互作用。Zeta电位测量表明，AgNPs的电位值低于−30 mV，具有很强的静电斥力和较高的胶体稳定性。此外，AgNPs溶液在储存4个月后仍保持稳定。这项工作为通过精确控制合成参数来定制特定应用的AgNPs的物理化学性质提供了有价值的见解。

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引用次数: 0

Polymeric silver(I) complex of a pyridine–1,2,3-Triazole ligand with potent cytotoxic and antibacterial activity 具有强细胞毒性和抗菌活性的吡啶- 1,2,3-三唑配体的聚合银(I)配合物

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-01-27 DOI: 10.1016/j.poly.2026.117989

Sümeyye Dilitatlı , Fatma Gül Özçelik Demirbanka , Vickie McKee , Muhammet Köse

1,2,3-Triazoles are privileged heterocyclic scaffolds with diverse pharmacological applications. Herein, we describe the synthesis, structural elucidation, and biological evaluation of a pyridine-substituted 1,2,3-triazole ligand (SM3) and its silver(I) coordination polymer (SM4). The triazole ligand was synthesized via Cu(I)-catalyzed azide–alkyne cycloaddition and characterized by FTIR, ¹H/¹³C NMR, mass spectra and elemental analysis. Complexation with AgNO₃ afforded a one-dimensional coordination polymer, as confirmed by single-crystal X-ray diffraction. SM3 crystallizes in the orthorhombic P2₁2₁2₁ space group, while SM4 adopts a polymeric chain architecture in the monoclinic C2/c system, with silver centers exhibiting distorted square-planar coordination via pyridine and triazole donors. Cytotoxicity was assessed using MTS assays against human chondrosarcoma (OUMS) and normal endothelial (HUVEC) cell lines. The Ag(I) complex (SM4) displayed pronounced cytotoxicity toward OUMS cells (IC₅₀ = 21.99 μg/mL), significantly exceeding the activity of cisplatin (IC₅₀ = 121.8 μg/mL), while demonstrating reduced toxicity toward HUVEC cells (IC₅₀ = 36.72 μg/mL). Antibacterial studies revealed that SM4 exhibited inhibitory effects against Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, and Bacillus cereus with MIC values in the range 1.25–2.5 mg/mL, whereas SM3 was largely inactive. These results indicate that silver(I) coordination markedly enhances the bioactivity of pyridine–triazole ligands.

1,2,3-三唑是具有多种药理应用的特殊杂环支架。本文描述了一种吡啶取代的1,2,3-三唑配体（SM3）及其银(I)配位聚合物（SM4）的合成、结构解析和生物学评价。采用Cu(I)催化叠氮-炔环加成法制备了三唑配体，并用FTIR、1H/13C NMR、质谱和元素分析对其进行了表征。单晶x射线衍射证实，与AgNO3络合得到一维配位聚合物。SM3在正交P2₁2₁2₁空间群中结晶，而SM4在单斜C2/c体系中采用聚合链结构，银中心通过吡啶和三唑给体表现出扭曲的方平面配位。采用MTS法对人软骨肉瘤（OUMS）和正常内皮（HUVEC）细胞系进行细胞毒性评估。Ag(I)复合物（SM4）对OUMS细胞表现出明显的细胞毒性（IC50 = 21.99 μg/mL），明显超过顺铂（IC50 = 121.8 μg/mL），而对HUVEC细胞的毒性（IC50 = 36.72 μg/mL）有所降低。抑菌研究表明，SM4对大肠杆菌、肺炎克雷伯菌、金黄色葡萄球菌和蜡样芽孢杆菌均有抑制作用，MIC值在1.25 ~ 2.5 mg/mL之间，而SM3基本无活性。这些结果表明，银(I)配位显著提高了吡啶-三唑配体的生物活性。

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引用次数: 0

Cadmium-organic frameworks for the multi-functional luminescence sensing of MnO4−, Cr2O72− and CrO42− in water 用于水中MnO4−、Cr2O72−和CrO42−多功能发光传感的镉-有机骨架

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-01-27 DOI: 10.1016/j.poly.2026.117991

Xue-Yan Yan , Ke-Yan Xu , Si-Yi Cai, Jun-Jie Ding, Guang-Ju Weng, Jian-Mei Lu, Li-Xiong Shao

Herein, by traditional solvothermal method, two-dimensional cadmium-organic frameworks (referred to as SLX-7), were successfully synthesized and structurally characterized. Due to the satisfactory luminescence property, SLX-7 can be used as a multi-responsive luminescence sensor for MnO₄⁻, Cr₂O₇²⁻ and CrO₄²⁻ in water, with high selectivity and sensitivity, and good recyclability. The luminescence sensing mechanism was carefully studied, showing that the competitive absorption between SLX-7 and the analytes is responsible for the luminescence quenching.

本文采用传统的溶剂热法成功合成了二维镉有机骨架（简称SLX-7），并对其进行了结构表征。由于SLX-7具有良好的发光性能，可以作为水中MnO4−、Cr2O72−和CrO42−的多响应发光传感器，具有较高的选择性和灵敏度，并且具有良好的可回收性。对SLX-7的发光感应机理进行了细致的研究，结果表明SLX-7与分析物之间的竞争吸收是导致其发光猝灭的原因。

引用次数: 0

A new study of the chemical mixture and solvation properties of Polyoxometalate compounds by using water, acids and organic solvents 用水、酸和有机溶剂研究了多金属氧酸盐化合物的化学混合物和溶剂化性能

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-01-26 DOI: 10.1016/j.poly.2026.117988

Ali Harchani

A new study of the influence of water, acids, and organic solvents on polyoxometalate compounds, has been reported in this work. To study the evolution of the properties more deeply, the calculation was applied to two different compounds, (C₆H₈N)₅[HAs₂Mo₆O₂₆(H₂O)].3H₂O (1) and [(C₇H₇N₂)₃(NH₄)]₂[Mo₈O₂₆]₂.4H₂O (2), which were previously elaborated, and their structures were studied by the same author. The obtained results of mixture properties, sorption, adsorption, and solvation properties analysis prove that polyoxometalate compounds are affected differently by water, acids, and organic solvents. In addition, the results proved the high impact of solvents on these types of compounds.

本文报道了一项关于水、酸和有机溶剂对多金属氧酸盐化合物影响的新研究。为了更深入地研究性能的演变，将计算应用于两种不同的化合物（C6H8N）5[HAs2Mo6O26(H2O)]。前人对[(C7H7N2)3(NH4)]2[Mo8O26]2.4H2O(2)进行了阐述，并对其结构进行了研究。所得的混合物性质、吸附、吸附和溶剂化性质分析结果证明，水、酸和有机溶剂对多金属氧酸盐化合物的影响是不同的。此外，结果还证明了溶剂对这些类型化合物的高影响。

引用次数: 0

The synthesis of a new 1,4-anthraquinone derivative molecule: its use as an ionophore in potentiometric sensor design, and its influence on pro-inflammatory cell death of granulosa cells 一种新型1,4-蒽醌衍生物分子的合成及其在电位传感器设计中的应用及其对颗粒细胞促炎细胞死亡的影响

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-01-26 DOI: 10.1016/j.poly.2026.117987

Kiymet Berkil Akar , Oguz Özbek , Caglar Berkel , Isa Mert Eski , Oguzhan Bebek , Onur Cem Altunoluk

In this study, a new 1,4-anthraquinone derivative molecule (3) was synthesized, and its potential as an ionophore in sensor design, and its influence on pro-inflammatory cell death were investigated. For this purpose, following the synthesis of the molecule, its characterization was carried out by ¹H-, ¹³C-NMR, and FT-IR spectroscopic methods. Subsequently, different sensors were prepared using the synthesized 1,4-anthraquinone molecule as an ionophore. The prepared sensors exhibited selectivity towards Pb²⁺ ions among different cationic species. The developed Pb²⁺-selective sensor had a wide linear working range of 1.0 × 10⁻¹–1.0 × 10⁻⁶ M, a low detection limit of 4.71 × 10⁻⁷ M, a Nernstian response of 26 ± 0.81 mV/decade and also a fast response time of 4 s. Besides, it was stable over a wide pH range (4.0–10.0) without being affected by pH changes. The surface morphologies of the prepared sensors were investigated by scanning electron microscopy (SEM). The sensors, which were produced quite economically, were then successfully applied in the analysis of real samples. Lastly, the novel molecule was found to slightly increase the release of pro-inflammatory proteins (IL-18 and LDH) from ovarian granulosa cells in vitro, indicating its potential as a pro-inflammatory cell death inducer.

本研究合成了一种新的1,4-蒽醌衍生物分子(3)，并对其在传感器设计中作为离子载体的潜力及其对促炎细胞死亡的影响进行了研究。为此，在分子合成后，通过1H-， 13C-NMR和FT-IR光谱方法对其进行了表征。随后，利用合成的1,4-蒽醌分子作为离子载体制备了不同的传感器。所制备的传感器在不同阳离子中对Pb2+离子具有选择性。所研制的Pb2+选择性传感器线性工作范围为1.0 × 10−1 ~ 1.0 × 10−6 M，检测限为4.71 × 10−7 M， Nernstian响应为26±0.81 mV/ 10年，响应时间为4 s。在较宽的pH范围内（4.0-10.0）均保持稳定，不受pH变化的影响。利用扫描电子显微镜（SEM）研究了所制备传感器的表面形貌。该传感器生产相当经济，然后成功地应用于实际样品的分析。最后，在体外实验中发现，这种新分子可以略微增加卵巢颗粒细胞中促炎蛋白（IL-18和LDH）的释放，这表明它可能是一种促炎细胞死亡诱导剂。

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引用次数: 0

Fabrication of Co-Fe LDH supported on CNT and investigation of its photocatalytic activity towards degradation of malachite green dye 碳纳米管负载Co-Fe LDH的制备及其降解孔雀石绿染料的光催化活性研究

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron

Pub Date : 2026-01-25 DOI: 10.1016/j.poly.2026.117985

Deep Kumar Bora , Shyamalee Patar , Sunita Laskar , Lakhya Jyoti Borthakur

Co-Fe layered double hydroxide (LDH) is a promising photocatalyst, however its wide band gap and limited charge separation hinder its visible light activity. In this study, a Co-Fe LDH@CNT nanocomposite was synthesized to enhance the photocatalytic performance. UV-DRS showed a blue shift in absorption edge from 226.80 nm to 223.58 nm for the composite with a significant band gap reduction from 2.73 eV to 2.10 eV. This reduction in band gap is attributed to interfacial charge transfer and improved conductivity due to CNTs. The composite exhibited superior photocatalytic degradation of malachite green (MG) dye, achieving over 96% removal within 45 min, compared to 82.42% in 120 min by the bare Co-Fe LDH. The apparent rate constant increased from 0.014 min⁻¹ for the bare Co-Fe LDH to 0.072 min⁻¹ for the composite. CNTs enhanced the charge carrier mobility, reduced recombination and promoted the generation of reactive oxygen species •OH and

O_{2}^{• -}

. The effect of pH, initial dye concentration and presence of inorganic salts on the degradation efficiency was also studied. The study confirms that CNTs effectively tune the band structure of Co-Fe LDH and significantly improved its photocatalytic efficiency, offering a scalable approach for the degradation of organic dyes under visible light

钴铁层状双氢氧化物（LDH）是一种很有前途的光催化剂，但其带隙宽和电荷分离有限，阻碍了其可见光活性。本研究合成了Co-Fe LDH@CNT纳米复合材料以增强其光催化性能。UV-DRS显示复合材料的吸收边从226.80 nm蓝移到223.58 nm，带隙从2.73 eV减小到2.10 eV。这种带隙的减小归因于界面电荷转移和碳纳米管提高的电导率。该复合材料对孔孔石绿（MG）染料表现出优异的光催化降解能力，在45 min内达到96%以上的去除率，而Co-Fe LDH在120 min内达到82.42%。表观速率常数从裸Co-Fe LDH的0.014 min−1增加到复合材料的0.072 min−1。CNTs增强了载流子迁移率，减少了复合，促进了活性氧•OH和O2•−的生成。考察了pH、初始染料浓度和无机盐的存在对降解效率的影响。该研究证实，CNTs可以有效调节Co-Fe LDH的能带结构，显著提高其光催化效率，为可见光下降解有机染料提供了一种可扩展的方法

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引用次数: 0

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