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Eco-friendly synthesized copper nanoparticles from Platostoma menthoides (L.): A novel bio larvicidal strategy against Spodoptera frugiperda 从薄荷Platostoma menthoides (L.)合成的环保铜纳米颗粒:一种新的生物杀幼虫策略
Pub Date : 2026-01-13 DOI: 10.1016/j.nxmate.2026.101594
Senthilkumar Pavithra , Aravinth Annamalai , P.F. Mishel , Azhagiya Manavalan Lakshmi Prabha
The green synthesis of copper nanoparticles (CuNPs) using an aqueous extract from a medicinal plant, Platostoma menthoides was investigated, emphasizing its larvicidal properties. This study aimed to evaluate the efficacy of these green-synthesized copper nanoparticles as a sustainable larvicidal agent against pest control agents. The biosynthesized CuNPs were thoroughly characterized through various analytical techniques, including UV–Vis spectroscopy, FT–IR, XRD, SEM, EDAX, particle size analysis and zeta potential, and HR-TEM. The successful synthesis of CuNPs was confirmed by the presence of an absorbance peak at 343 nm. FT–IR spectra identified various functional groups and molecular interactions, while XRD analysis revealed their crystalline nature. SEM analysis confirmed the cubic morphology of the nanoparticles, and EDAX determined the elemental copper composition. Particle size analysis indicated an average size of 152.3 nm and a zeta potential of −34.6 mV affirmed their stability. CuNPs exhibiting crystalline morphology and moderate aggregation, as confirmed by HR-TEM analysis. Potent larvicidal activity against Spodoptera frugiperda was observed. A dosage of 100 μg/mL resulted in LC₅₀ and LC₉₀ values of 55.64 and 122.79 μg/mL, respectively, at 24 h post-treatment. Histopathological analysis of larvae treated with nanoparticles revealed extensive tissue damage and structural disruption. Furthermore, a Lethality bioassay using Artemia salina nauplii showed a dose-dependent toxic response was observed with 100 μg/mL showing an LC₅₀ and LC₉₀ value of 165.59 and 247.73 μg / mL, indicating that the CuNPs exhibit moderate toxicity. These findings highlight the potential of P. menthoides-derived CuNPs as an eco-friendly pest control agent with promising applications in sustainable agriculture and pest management.
研究了药用植物薄荷Platostoma menthoides水提物绿色合成铜纳米粒子(CuNPs)的方法,重点研究了其杀幼虫性能。本研究旨在评价这些绿色合成的铜纳米颗粒作为一种可持续的杀幼虫剂对害虫防治剂的效果。通过UV-Vis光谱、FT-IR、XRD、SEM、EDAX、粒度分析、zeta电位、HR-TEM等分析技术对合成的CuNPs进行了全面表征。通过在343 nm处出现吸光度峰,证实了CuNPs的成功合成。FT-IR光谱鉴定了各种官能团和分子相互作用,XRD分析揭示了它们的结晶性质。SEM分析证实了纳米颗粒的立方形态,EDAX测定了元素铜的组成。粒径分析表明,平均粒径为152.3 nm, zeta电位为−34.6 mV,证实了其稳定性。经HR-TEM分析证实,CuNPs表现出结晶形态和适度聚集。对褐夜蛾有较强的杀幼虫活性。100 μg/mL的剂量在处理后24 h时,LC₅₀和LC₉₀的值分别为55.64和122.79 μg/mL。纳米颗粒处理的幼虫组织病理学分析显示广泛的组织损伤和结构破坏。此外,使用Artemia salina nauplii进行的致命性生物测定显示,观察到剂量依赖性毒性反应,100 μg/mL显示LC₅₀和LC₉₀值为165.59和247.73 μg /mL,表明CuNPs具有中等毒性。这些发现突出了薄荷草衍生的CuNPs作为一种生态友好型害虫防治剂的潜力,在可持续农业和害虫管理中具有广阔的应用前景。
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引用次数: 0
Biomass derived activated carbon infused Sr doped ZnO nanoneedles for pseudocapattery applications 生物质衍生活性炭注入Sr掺杂ZnO纳米针用于假电池应用
Pub Date : 2026-01-13 DOI: 10.1016/j.nxmate.2026.101607
Dhanabal R, Yamini J, Gomathi Priya P
Strontium doped zinc oxide infused with activated carbon nanocomposites were synthesized via chemical precipitation method and utilized for energy storage applications. Crystal structure, surface morphology, binding energy and surface area were studied using X-Ray diffraction, Scanning and Transmission Electron Microscopy, X-ray Photoelectron Spectroscopy, Brunauer-Emmet-Teller Analysis, Fourier Transform Infrared spectroscopy and Raman spectroscopy. Cyclic voltammetry and chronopotentiometry analysis attributed to the pseudocapacitive nature of the synthesized nanocomposites which are confirmed further by the diffusive and capacitive contribution to the specific capacitance and the Dunn plot. The nanocomposites with 2 % activated carbon in the crystal structure showed higher Specific capacitance of 792.42 F/g at a current density of 1 A/g and charge transfer resistance of 3.81 Ω with an energy and power density of 39.62 Wh/Kg and 514.28 W/Kg respectively with a cyclic stability retention of 97.9 % over 2000 cycles for the three-electrode configuration. The SZOA-2 % nanocomposites showed a specific capacitance of 86.95 F/g at 1 A/g with an energy density of 18.56 Wh/Kg and a power density of 619.69 W/kg for the two-electrode system showing the nature of the nanocomposites as a highly reliable hybrid supercapacitor.
采用化学沉淀法合成了活性炭掺杂锶氧化锌纳米复合材料,并将其应用于储能领域。利用x射线衍射、扫描和透射电子显微镜、x射线光电子能谱、布鲁诺尔-埃米特-泰勒分析、傅里叶变换红外光谱和拉曼光谱对晶体结构、表面形貌、结合能和表面积进行了研究。循环伏安法和时间电位法分析表明,合成的纳米复合材料具有假电容性,扩散和电容对比电容的贡献以及Dunn图进一步证实了这一点。晶体结构中含有2 %活性炭的纳米复合材料在电流密度为1 a /g时比电容为792.42 F/g,电荷转移电阻为3.81 Ω,能量和功率密度分别为39.62 Wh/Kg和514.28 W/Kg,循环稳定性保持率为97.9% %。SZOA-2 %纳米复合材料在1 a /g下的比电容为86.95 F/g,能量密度为18.56 Wh/Kg,功率密度为619.69 W/ Kg,表明该纳米复合材料是一种高度可靠的杂化超级电容器。
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引用次数: 0
Review of recent progress in enhanced quantum dot solar cells via plasmonic nanostructures 等离子体纳米结构增强量子点太阳能电池研究进展综述
Pub Date : 2026-01-13 DOI: 10.1016/j.nxmate.2026.101599
Tobi Samson Ogundeji , Gabriel Ayinde Alamu , Olayinka Joshua Oyewole , Mayowa James Johnson , Abdulmutolib Olajide Olaoye , Shweta Vyas , Mojoyinola Kofoworola Awodele , Oluwaseun Adedokun
One attractive method for enhancing photon harvesting capacities in quantum dot (QD) photovoltaics is through the integration of plasmon enhanced nanostructures. Quantum Dot Solar Cells (QDSCs) possess unique qualities including multiple electron-hole pair generation, photoluminescence and tunable energy gap that can make them suited for energy devices potentially leading to enhanced efficiency. QDSCs due to its potential can surpass the theoretical limit but the challenges in charge carrier separation and transport limit its efficiency. These limitations prevent QDSCs from fully overcoming the fundamental efficiency limit for single-junction solar cells. Surface plasmons are beneficial for enhance light absorption and their nonradiative decay process generate hot electrons. Plasmonic metals have recently been added to QDSCs for better efficiency. The plasmonic resonances in metallic nanostructures allow light absorption, scattering and generation of localized electromagnetic field enhancements within QDSCs to reduce recombination and transition losses. This review examines the recent progress in plasmonic nanostructures for QDSCs, with focus on quantum dot properties, common synthesis routes and the three principal architectures of QDSCs namely; sensitized, depleted heterojunction and Schottky-type configurations. The underlying enhancement mechanisms, including optical field enhancement, scattering-induced light trapping, hot-electron injection and plasmon-induced resonance energy transfer were also discussed. Depending on plasmonic design and device architecture, comparative efficiency summaries are discussed relative to the Shockley–Queisser limit to assess the extent and limitations of plasmonic gains. Key fabrication and stability challenges are discussed and finally future research directions toward achieving next-generation high-performance photovoltaic devices are outlined.
在量子点(QD)光伏中提高光子捕获能力的一种有吸引力的方法是通过集成等离子体增强纳米结构。量子点太阳能电池(qdsc)具有独特的品质,包括多电子-空穴对产生,光致发光和可调谐的能隙,使其适合于潜在的能源设备,从而提高效率。qdsc由于其潜力可以超越理论极限,但在载流子分离和输运方面的挑战限制了其效率。这些限制阻碍了qdsc完全克服单结太阳能电池的基本效率限制。表面等离子体有利于增强光吸收,其非辐射衰变过程产生热电子。等离子体金属最近被添加到qdsc中以提高效率。金属纳米结构中的等离子共振允许光吸收、散射和产生局域电磁场增强,从而减少复合和跃迁损失。本文综述了QDSCs等离子体纳米结构的研究进展,重点介绍了QDSCs的量子点特性、常见的合成途径以及QDSCs的三种主要结构:敏化,耗尽异质结和肖特基型构型。讨论了光场增强、散射诱导的光捕获、热电子注入和等离子体诱导的共振能量转移等增强机制。根据等离子体设计和器件结构的不同,本文讨论了相对于Shockley-Queisser极限的比较效率总结,以评估等离子体增益的程度和局限性。讨论了关键的制造和稳定性挑战,最后概述了实现下一代高性能光伏器件的未来研究方向。
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引用次数: 0
Structural, morphological, magnetic, and electrical properties of ZrFe2-xNixO5 nanoparticles (x = 0–0.05) synthesized via sol-gel auto-combustion 溶胶-凝胶自燃烧法合成的ZrFe2-xNixO5纳米粒子(x = 0-0.05)的结构、形态、磁性和电学性质
Pub Date : 2026-01-13 DOI: 10.1016/j.nxmate.2026.101606
Avadhut Manage , B.G. Hegde , Shidaling Matteppanavar
<div><div>The present work focuses on a detailed investigation into the structural, morphological, magnetic, impedance, and dielectric properties of Ni-doped <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span>, synthesized via the sol-gel auto-combustion method. The X-ray diffraction (XRD) measurements confirm the formation of a <em>monoclinic</em> crystal structure with the C2/c space group. Rietveld refinement analysis was carried out for all the samples and the lattice parameters. Morphological characterization using scanning electron microscopy (SEM) reveals a non-uniform distribution of grains and distinct grain boundaries indicate both doping and the sol-gel auto-combustion process impacts on the material's structure. Energy Dispersive X-Ray Spectroscopy (EDAX) study verifies chemical composition of <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> and stoichiometric doping of nickel into <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span>. Room temperature (300 K) magnetic hysteresis (M-H) loop reveals Ni-doped <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> are soft ferromagnetic in nature and retentivity, coercivity, remanent magnetization and low squareness ratio (S<0.05) indicates the materials possess multi domain ferromagnetic state. Doping of nickel into <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> decreases remanent magnetization, retentivity, squareness ratio and magnetic moments. Room temperature (300 K) frequency-dependent electrical properties were analyzed comprehensively, showing that the impedance and dielectric behavior are governed by non-Debye type dielectric relaxation. Doping of nickel into <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> increases impedance and decreases dielectric constant. AC conductivity analysis demonstrates a distinctive response with two prominent peaks, one observed at low frequencies and another at higher frequencies, suggesting complex charge transport mechanisms. This study provides insights into the complex interaction between the Ni doping, the sol-gel auto-combustion synthesis and the resulting multi-functional properties of Ni doped <span><math><mrow><mi>Zr</mi><msub><mrow><mi>Fe</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>5</mn></mrow></ms
本文重点研究了通过溶胶-凝胶自燃烧法合成的掺杂镍的ZrFe2O5的结构、形态、磁性、阻抗和介电性能。x射线衍射(XRD)测量证实了C2/c空间群的单斜晶结构的形成。对所有样品和晶格参数进行了Rietveld细化分析。扫描电镜(SEM)形貌表征表明,掺杂和溶胶-凝胶自燃烧过程对材料结构都有影响,晶粒分布不均匀,晶界明显。能量色散x射线光谱(EDAX)研究证实了ZrFe2O5的化学组成和镍在ZrFe2O5中的化学计量掺杂。室温(300 K)磁滞回线(M-H)表明,ni掺杂的ZrFe2O5具有软铁磁性质,保留率、矫顽力、剩余磁化率和低方形比(S<0.05)表明材料具有多畴铁磁状态。在ZrFe2O5中掺杂镍降低了ZrFe2O5的剩余磁化强度、保留率、方位比和磁矩。综合分析了室温(300 K)频率相关的电学特性,表明阻抗和介电行为受非debye型介电弛豫控制。在ZrFe2O5中掺杂镍增加了阻抗,降低了介电常数。交流电导率分析显示有两个显著的峰,一个在低频下观察到,另一个在高频下观察到,表明复杂的电荷传输机制。该研究揭示了Ni掺杂、溶胶-凝胶自燃烧合成和Ni掺杂ZrFe2O5之间复杂的相互作用以及由此产生的多功能特性,并表明其作为可调谐磁性和介电器件的潜在候选材料。
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The X-ray diffraction (XRD) measurements confirm the formation of a &lt;em&gt;monoclinic&lt;/em&gt; crystal structure with the C2/c space group. Rietveld refinement analysis was carried out for all the samples and the lattice parameters. Morphological characterization using scanning electron microscopy (SEM) reveals a non-uniform distribution of grains and distinct grain boundaries indicate both doping and the sol-gel auto-combustion process impacts on the material's structure. Energy Dispersive X-Ray Spectroscopy (EDAX) study verifies chemical composition of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;Zr&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and stoichiometric doping of nickel into &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;Zr&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. Room temperature (300 K) magnetic hysteresis (M-H) loop reveals Ni-doped &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;Zr&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; are soft ferromagnetic in nature and retentivity, coercivity, remanent magnetization and low squareness ratio (S&lt;0.05) indicates the materials possess multi domain ferromagnetic state. Doping of nickel into &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;Zr&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; decreases remanent magnetization, retentivity, squareness ratio and magnetic moments. Room temperature (300 K) frequency-dependent electrical properties were analyzed comprehensively, showing that the impedance and dielectric behavior are governed by non-Debye type dielectric relaxation. Doping of nickel into &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;Zr&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; increases impedance and decreases dielectric constant. AC conductivity analysis demonstrates a distinctive response with two prominent peaks, one observed at low frequencies and another at higher frequencies, suggesting complex charge transport mechanisms. This study provides insights into the complex interaction between the Ni doping, the sol-gel auto-combustion synthesis and the resulting multi-functional properties of Ni doped &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;Zr&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;Fe&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/ms","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101606"},"PeriodicalIF":0.0,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrigendum to “Enhancing pilling resistance in polyester-cotton blended knitted fabrics through combined singeing and heat setting treatments” [Next Mater., Vol. 10 (2026), Article 101562] “通过综合烧毛和热定型处理提高涤棉混纺针织物的抗起球性”的勘误表[下一页]。,第10卷(2026),第101562条]
Pub Date : 2026-01-12 DOI: 10.1016/j.nxmate.2026.101601
Md. Shakhawat Hossain , Harun Ar Rashid , Suprio Shantanu Saha , Sumon Chandra Dey , Joy Sarkar
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引用次数: 0
Sustainable mechanochemical synthesis of zeolite/periwinkle shell nanocomposites for lead adsorption and antimicrobial activity 沸石/长春花壳纳米复合材料吸附铅及抗菌性能的可持续机械化学合成
Pub Date : 2026-01-12 DOI: 10.1016/j.nxmate.2025.101581
Prosper Elechi , Amarachi Udoka Nkwoada , Clinton Silas Okpara , Tochukwu Ifeanyi Nwakile , Dele.Peter Fapojuwo , Chidozie Peter Chikezie , Samuel Anthonio Kalu , Callistus Izunna Iheme , Chike Anthony Nweze , Stanley Chinonso Ukanero , Chima Kenneth Oguzie , Christopher Ikpe-Amadi Nwoko
Zeolite/periwinkle shell ash (Ze/PSA) nanocomposite was prepared via the mechanochemical technique and characterized by SEM/EDX, TEM, AFM, XRD, FTIR, and BET to determine its morphological, structural, and surface characteristics for Pb2 + adsorption and antimicrobial treatment. The minimum inhibitory concentration was determined to vary from 2.5 to 12.5 mg/mL for Pseudomonas aeruginosa, Streptococcus spp, Escherichia coli, and Staphylococcus aureus. The nanocomposite was hierarchically porous, polydisperse nanoparticle (1.55–22.25 nm) and possesses a large surface area (396.2 m2/g), good for adsorption and trapping of microbes. The optimum pH of 6.0 yielded ∼92 % removal of Pb2+ in 90 min. The adsorption data were equally well-described by both the Langmuir (qe = 102.04 mg/g) and Freundlich (KF∼ = 9.85 mg/g)(L//mg)1/n) isotherm models, with similar high correlation coefficients (R² = 0.999). Kinetic data were best described by the pseudo-second-order model (qe = 107.70 mg/g), indicating a chemisorption mechanism. Thermodynamic data; ΔH° = + 28.15 kJ/mol, ΔS° = + 114.83 J/mol revealed a spontaneous, endothermic, and entropy-favored adsorption. Hence, Ze/PSA emerges as a promising, cost-effective adsorbent with robust mechanistic properties, making it an attractive option for metal-selective adsorption of Pb2+ over Cu (II), Cd (II), Zn (II), and for antimicrobial applications. Future work should include validation of the binding mechanisms and testing with real wastewater to confirm practical applicability and cost-effectiveness, utilizing advanced spectroscopic techniques.
采用机械化学方法制备了沸石/紫菀壳灰(Ze/PSA)纳米复合材料,并通过SEM/EDX、TEM、AFM、XRD、FTIR和BET等手段对其进行了表征,以确定其形态、结构和表面特征,并对Pb2 +进行了吸附和抗菌处理。对铜绿假单胞菌、链球菌、大肠杆菌和金黄色葡萄球菌的最低抑菌浓度为2.5 ~ 12.5 mg/mL。该纳米复合材料具有分层多孔、多分散的纳米颗粒(1.55-22.25 nm),具有较大的表面积(396.2 m2/g),有利于吸附和捕获微生物。最优pH为6.0,在90 min内Pb2+去除率为~ 92 %。Langmuir (qe = 102.04 mg/g)和Freundlich (KF ~ = 9.85 mg/g)(L//mg)1/n)等温线模型均能很好地描述吸附数据,具有相似的高相关系数(R²= 0.999)。动力学数据用拟二阶模型(qe = 107.70 mg/g)描述最好,表明其为化学吸附机制。热力学数据;ΔH°= + 28.15 kJ/mol, ΔS°= + 114.83 J/mol表现为自发、吸热、熵优吸附。因此,Ze/PSA作为一种具有强大机械性能的有前途的、具有成本效益的吸附剂出现,使其成为金属选择性吸附Pb2+在Cu (II)、Cd (II)、Zn (II)上的有吸引力的选择,并用于抗菌应用。未来的工作应该包括结合机制的验证和实际废水的测试,以确认实用性和成本效益,利用先进的光谱技术。
{"title":"Sustainable mechanochemical synthesis of zeolite/periwinkle shell nanocomposites for lead adsorption and antimicrobial activity","authors":"Prosper Elechi ,&nbsp;Amarachi Udoka Nkwoada ,&nbsp;Clinton Silas Okpara ,&nbsp;Tochukwu Ifeanyi Nwakile ,&nbsp;Dele.Peter Fapojuwo ,&nbsp;Chidozie Peter Chikezie ,&nbsp;Samuel Anthonio Kalu ,&nbsp;Callistus Izunna Iheme ,&nbsp;Chike Anthony Nweze ,&nbsp;Stanley Chinonso Ukanero ,&nbsp;Chima Kenneth Oguzie ,&nbsp;Christopher Ikpe-Amadi Nwoko","doi":"10.1016/j.nxmate.2025.101581","DOIUrl":"10.1016/j.nxmate.2025.101581","url":null,"abstract":"<div><div>Zeolite/periwinkle shell ash (Ze/PSA) nanocomposite was prepared via the mechanochemical technique and characterized by SEM/EDX, TEM, AFM, XRD, FTIR, and BET to determine its morphological, structural, and surface characteristics for Pb<sup>2 +</sup> adsorption and antimicrobial treatment. The minimum inhibitory concentration was determined to vary from 2.5 to 12.5 mg/mL for <em>Pseudomonas aeruginosa</em>, <em>Streptococcus spp</em>, <em>Escherichia coli,</em> and <em>Staphylococcus aureus</em>. The nanocomposite was hierarchically porous, polydisperse nanoparticle (1.55–22.25 nm) and possesses a large surface area (396.2 m<sup>2</sup>/g), good for adsorption and trapping of microbes. The optimum pH of 6.0 yielded ∼92 % removal of Pb<sup>2+</sup> in 90 min. The adsorption data were equally well-described by both the Langmuir (qe = 102.04 mg/g) and Freundlich (K<sub>F</sub>∼ = 9.85 mg/g)(L//mg)1/n) isotherm models, with similar high correlation coefficients (R² = 0.999). Kinetic data were best described by the pseudo-second-order model (qe = 107.70 mg/g), indicating a chemisorption mechanism. Thermodynamic data; ΔH° = + 28.15 kJ/mol, ΔS° = + 114.83 J/mol revealed a spontaneous, endothermic, and entropy-favored adsorption. Hence, Ze/PSA emerges as a promising, cost-effective adsorbent with robust mechanistic properties, making it an attractive option for metal-selective adsorption of Pb<sup>2+</sup> over Cu (II), Cd (II), Zn (II)<sup>,</sup> and for antimicrobial applications. Future work should include validation of the binding mechanisms and testing with real wastewater to confirm practical applicability and cost-effectiveness, utilizing advanced spectroscopic techniques.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101581"},"PeriodicalIF":0.0,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanisms of molybdenum ions adsorption on gamma nanoalumina: A detailed analysis using kinetics and isotherms with radiotracer techniques 钼离子在纳米氧化铝上的吸附机理:利用动力学和等温线与放射性示踪技术的详细分析
Pub Date : 2026-01-12 DOI: 10.1016/j.nxmate.2026.101584
Emily Vivanco-Cuba , Anaís Adauto , Pablo Mendoza
The adsorption of molybdenum ions from aqueous solutions was studied using commercial nanometric particles of gamma aluminum oxide (γ-Al₂O₃) measuring 5 and 80 nm, employing the radiotracer technique, which allowed working with trace concentrations and accurately monitoring the evolution of the species in solution. To characterize the process, kinetic and equilibrium studies were carried out in order to elucidate the adsorption mechanism and determine the maximum capacity. The results showed that the retention of molybdenum ions in γ-Al₂O₃ is rapid, occurring mainly in the first two minutes, and that the temporal evolution is adequately described by the pseudo-second-order model, indicating specific interactions between the molybdate anion and the alumina surface. The 5 nm γ-Al₂O₃ material showed a slightly higher adsorption capacity than the 80 nm γ-Al₂O₃, attributable to its larger specific surface area. According to the isothermal model, the maximum adsorption values (qm) were 386.95 mg g⁻¹ for γ-Al₂O₃-5 nm and 368.20 mg g⁻¹ for γ-Al₂O₃-80 nm. These results demonstrate the high efficiency of γ-Al₂O₃ nanomaterials in molybdenum adsorption and highlight their potential application in ⁹⁹Mo/⁹⁹ᵐTc generator systems.
采用5和80 nm的γ-Al₂O₃(γ-Al₂O₃)商用纳米粒子,采用放射性示踪技术研究了钼离子在水溶液中的吸附,该技术可以对痕量浓度进行研究,并准确监测溶液中物种的演变。为了表征这一过程,进行了动力学和平衡研究,以阐明吸附机理并确定最大吸附容量。结果表明,钼离子在γ-Al₂O₃中的滞留是快速的,主要发生在前2分钟,并且时间演化可以用拟二阶模型充分描述,表明钼酸盐阴离子与氧化铝表面之间存在特定的相互作用。5 nm的γ-Al₂O₃材料的吸附能力略高于80 nm的γ-Al₂O₃,这是由于它的比表面积更大。根据等温模型,γ-Al₂O₃-5 nm的最大吸附值(qm)为386.95 mg g⁻¹ ,γ-Al₂O₃-80 nm的最大吸附值为368.20 mg g⁻¹ 。这些结果证明了γ-Al₂O₃纳米材料对钼的高效吸附,并强调了它们在⁹Mo/⁹Tc发生器系统中的潜在应用。
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引用次数: 0
Development of a luminescent gas sensor based on sulfur quantum dots (SQDs) for ethyl mercaptan detection 基于硫量子点的乙基硫醇荧光气体传感器的研制
Pub Date : 2026-01-12 DOI: 10.1016/j.nxmate.2026.101591
Adhila F. Sanches , Cauã L.R. dos Santos , Gricirene S. Correia , Leonis Luz Lourenço , Severino Alves Júnior , Leonardo T.B. Mendonça
This research describes the development of a luminescent gas sensor using sulfur quantum dots (SQD’s) and an LED, demonstrating the potential of s-dots for rapid and sensitive detection of gases like ethyl mercaptan. The study showcases a low-cost and efficient system for gas detection, utilizing the properties of SQD’s deposited on the LED surface and capture of luminescence variation by a cheap photoresistor. Transmission electron microscopy (TEM), X ray diffraction (XRD), Fourier Transform Infrared (FTIR), UV–vis and photoluminescence characterization technique were used. TEM results showed a nearly spherical-shape and an average size distribution of 2.9 ± 0.02 nm. Characteristic signals of vibrational modes S-S and SO bonds were identified through FTIR. XRD revealed the semi crystalline nature sample’s, with sharp peaks indicating the presence of precursor sulfur and its oxidized compounds alongside a broad band centered at 20°. The tests with the gas sensor for ethyl mercaptan proved highly effective for detecting between 0.5 and 7.0 ppm range, with a response and recovery time of 91 and 31 s, respectively.
本研究描述了一种使用硫量子点(SQD’s)和LED的发光气体传感器的开发,展示了s点在快速、灵敏地检测乙基硫醇等气体方面的潜力。该研究展示了一种低成本和高效的气体检测系统,利用沉积在LED表面的SQD的特性,并通过廉价的光敏电阻捕获发光变化。采用透射电镜(TEM)、X射线衍射(XRD)、傅里叶变换红外(FTIR)、紫外-可见及光致发光等表征技术。透射电镜结果显示其呈近球形,平均粒径分布为2.9 ± 0.02 nm。通过FTIR识别了S-S和SO键的振动模式特征信号。XRD显示样品的半结晶性质,在20°中心的宽波段上有尖峰表明前驱体硫及其氧化化合物的存在。使用该气体传感器对乙基硫醇进行的测试证明,在0.5 ~ 7.0 ppm范围内的检测非常有效,响应时间和恢复时间分别为91和31 s。
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引用次数: 0
Microstructural and mechanical performance of coconut shell biochar – Modified asphalt for sustainable pavement applications 可持续路面用椰子壳生物炭改性沥青的微观结构和力学性能
Pub Date : 2026-01-10 DOI: 10.1016/j.nxmate.2026.101595
S. Mahalakshmi, Revathy Jayaseelan, Gajalakshmi Pandulu
This study investigates coconut shell biochar (CSB) as a sustainable, bio-based modifier for enhancing the mechanical performance and durability of hot-mix asphalt (HMA). CSB was produced by controlled laboratory pyrolysis, and its chemical and microstructural characteristics were analysed before incorporation into 40/50 penetration-grade asphalt at different dosages. Binder evaluations included penetration, softening point, ductility, and elastic recovery, while mixture performance was assessed using Marshall Stability, flow, volumetric properties, indirect tensile strength (ITS), and tensile strength ratio (TSR). Results indicated a decrease in penetration and an increase in the softening point, indicating a stiffer, more thermally stable binder. Marshall Stability reached 9.2 kN at 12.5 % CSB with a flow of 2.6 mm, while bulk density slightly decreased and air voids increased but remained within 3–5 %, ensuring adequate compaction. VMA and VFB were balanced at 12.5–15 % CSB, and tensile strength and moisture resistance improved up to 15 %, with ITS and TSR values declining at higher dosages. Response Surface Methodology (RSM) confirmed 12.5 % CSB as the optimal dosage, with quadratic models showing high predictive accuracy (R² > 0.95). Microstructural analyses (SEM, EDX, FTIR, XRD), pore structure analyses, and chemical investigations validated these findings, highlighting CSB's potential as an effective asphalt modifier, particularly under India's varied climatic conditions. The improved stiffness and moisture sensitivity performance also suggest practical benefits in terms of durability and reduced binder demand, leading to material savings. Overall findings emphasise CSB’s potential as a sustainable, cost-effective bio-based modifier capable of extending pavement service life under high traffic volumes and diverse climatic conditions.
本研究研究了椰子壳生物炭(CSB)作为一种可持续的生物基改性剂,用于提高热混合沥青(HMA)的机械性能和耐久性。采用实验室控制热解法制备CSB,并对其化学和微观结构特征进行了分析,然后以不同的掺量掺入40/50渗透级沥青中。粘合剂的评估包括渗透、软化点、延展性和弹性恢复,而混合物的性能评估包括马歇尔稳定性、流动性、体积性能、间接抗拉强度(ITS)和抗拉强度比(TSR)。结果表明,渗透降低,软化点增加,表明粘合剂更硬,更热稳定。在12.5 % CSB条件下,流量为2.6 mm,马歇尔稳定性达到9.2 kN,堆积密度略有下降,空隙率增加,但保持在3-5 %,保证了充分的压实。VMA和VFB在12.5-15 % CSB时达到平衡,抗拉强度和抗湿性提高至15 %,ITS和TSR值随着添加量的增加而下降。响应面法(RSM)确定12.5 % CSB为最佳投加量,二次模型预测精度较高(R²> 0.95)。微观结构分析(SEM, EDX, FTIR, XRD),孔隙结构分析和化学研究证实了这些发现,强调了CSB作为有效沥青改性剂的潜力,特别是在印度多变的气候条件下。改进的刚度和湿敏感性性能也表明在耐久性和减少粘合剂需求方面的实际好处,从而节省材料。总的来说,研究结果强调CSB作为一种可持续的、具有成本效益的生物基改性剂的潜力,能够在高交通量和各种气候条件下延长路面的使用寿命。
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引用次数: 0
Fabrication of thermally insulative and highly transparent cellulose aerogel for climate-adaptive energy efficient window 用于气候适应性节能窗的隔热高透明纤维素气凝胶的研制
Pub Date : 2026-01-10 DOI: 10.1016/j.nxmate.2025.101583
Yuxuan Xue , Kuanwen Wang , Qinye Lu , Xiaoke Chen , Zenan Jin , Tianyu Cai , Yanghua Lu , Zhenqian Pang , Tengyao Jiang , Gang Tan
Minimizing the energy demand of buildings by utilizing innovative materials for transparent building envelopes, such as windows, represents a promising strategy to enhance energy efficiency and contribute significantly to carbon neutrality at worldwide. Windows are less energy efficient than non-transparent building components, primarily due to their higher U-value and increased solar heat gain. Designing an ideal energy-efficient window requires a synergistic combination of high visible light transmittance, superior thermal insulation, and effective solar heat regulation capabilities. In this study, an advanced energy-efficient glazing system was developed by integrating thermally insulative features and different surface optical properties. To assemble such structure, a key component of a transparent and insulating film was synthesized from sustainable and renewable cellulose with high length-to-diameter ratio and optimized size distribution, originated from high-pressure homogenized modification and sonication. The as-synthesized film exhibits excellent transparency (∼90 %) and outstanding thermal insulation (0.027 W/m·K), accompanying with attachable capability onto glass surfaces via electrostatic forces. Hot stage and outdoor demonstration tests revealed that a single-pane glazing applied with this film presented superior insulation properties compared to conventional double-pane glazing while high visible light transmittance was still reserved. Based on this transparent cellulose aerogel, a composite window structure combining thermal insulation and spectral selective feature was fabricated for various climates. The results of building energy simulation supported that the energy saving performance of the composite window was superior to that of existing counterparts, and it could achieve up to 40 % energy savings compared to single-pane glazing. The proposed energy-efficient windows, made from cost-effective materials derived from biomass resources, hold significant potential as replacements for commercially available glazing systems in large-scale applications.
通过使用创新的透明建筑围护结构材料(如窗户)来最大限度地减少建筑物的能源需求,是一种有前途的战略,可以提高能源效率,并在全球范围内为碳中和做出重大贡献。窗户的能源效率低于非透明的建筑构件,主要是由于其更高的u值和增加的太阳能热增益。设计一个理想的节能窗户需要高可见光透过率,优越的隔热和有效的太阳能热调节能力的协同组合。在本研究中,开发了一种先进的节能玻璃系统,将隔热特性与不同的表面光学特性相结合。为了组装这种结构,利用可持续再生的高长径比和优化尺寸分布的纤维素,通过高压均质改性和超声合成了透明绝缘薄膜的关键组分。合成的薄膜具有优异的透明度(~ 90 %)和出色的绝热性(0.027 W/m·K),并具有通过静电力附着在玻璃表面的能力。热阶段和室外演示测试表明,与传统的双层玻璃相比,应用该薄膜的单层玻璃具有优越的隔热性能,同时仍然保留了高可见光透射率。在这种透明纤维素气凝胶的基础上,制作了一种结合了隔热和光谱选择特性的复合窗户结构,用于各种气候条件。建筑能源模拟结果表明,复合窗的节能性能优于现有的同类产品,与单窗格玻璃相比,可节省高达40% %的能源。拟议的节能窗户由来自生物质资源的具有成本效益的材料制成,在大规模应用中具有替代商业上可用的玻璃系统的巨大潜力。
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引用次数: 0
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