Journal of the Indian Chemical Society最新文献_第6页

Efficient basic red 46 dye removal using smart novel nanocomposite 新型纳米复合材料高效脱除碱性红46染料

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-22 DOI: 10.1016/j.jics.2025.102369

Nada S. Al-Kadhi , Ehab A. Abdelrahman , Reem K. Shah

Basic red 46 dye, extensively utilized in the textile industry, poses significant environmental and health threats owing to its high chemical stability, persistence, and toxicity. In this study, novel MgAl_0.42Cr_1.58O₄@C nanocomposites were fabricated via a facile Pechini sol-gel approach at calcination temperatures of 600 and 800 °C, producing MAC600 and MAC800, respectively, to achieve effective elimination of basic red 46 dye from aquatic solutions. X-ray diffraction analysis (XRD) illustrated the occurrence of a cubic crystal arrangement, presenting mean crystallite sizes of 12.5 nm concerning MAC600 and 32.3 nm concerning MAC800, reflecting enhanced crystal growth at higher calcination temperature. Energy-dispersive X-ray spectroscopy (EDX) revealed that MAC600 contained 9.2 % C, 51.4 % O, 15.3 % Mg, 10.6 % Al, and 13.5 % Cr, while MAC800 exhibited slightly higher metal content due to more complete decomposition of organics. Field emission scanning electron microscopy (FE-SEM) images showed that MAC600 had a porous morphology with spherical voids, whereas MAC800 presented denser agglomerates with reduced porosity. High-resolution transmission electron microscope (HR-TEM) images confirmed well-dispersed spherical nanoparticles demonstrating average diameters of 6.25 nm regarding MAC600 and 25.94 nm regarding MAC800. The highest sorption capabilities obtained were 432.90 mg/g concerning MAC600 and 276.24 mg/g concerning MAC800, outperforming other adsorbents reported in the literature. Thermodynamic studies confirmed the exothermic, spontaneous, and physisorptive nature of the adsorption, while kinetic and isotherm modeling showed that adsorption adhered to the pseudo-first-order model and fit well with the Langmuir isotherm. The nanocomposites also demonstrated excellent regeneration and reusability, retaining high adsorption efficiency over multiple adsorption–desorption cycles.

碱性红46染料广泛用于纺织工业，由于其高化学稳定性、持久性和毒性，对环境和健康构成重大威胁。在本研究中，通过简便的Pechini溶胶-凝胶法在600℃和800℃的煅烧温度下制备了新型MgAl0.42Cr1.58O4@C纳米复合材料，分别产生了MAC600和MAC800，以有效消除水中的碱性红46染料。x射线衍射分析（XRD）表明，MAC600的平均晶粒尺寸为12.5 nm， MAC800的平均晶粒尺寸为32.3 nm，表明在较高的煅烧温度下晶体生长增强。能量色散x射线光谱（EDX）显示，MAC600的C含量为9.2%，O含量为51.4%，Mg含量为15.3%，Al含量为10.6%，Cr含量为13.5%，而MAC800由于有机物分解更彻底，金属含量略高。场发射扫描电镜（FE-SEM）图像显示，MAC600具有球形孔洞的多孔形态，而MAC800则呈现致密的团聚体，孔隙率降低。高分辨率透射电子显微镜（HR-TEM）图像证实了分散良好的球形纳米颗粒，表明MAC600的平均直径为6.25 nm， MAC800的平均直径为25.94 nm。MAC600的最高吸附能力为432.90 mg/g， MAC800的最高吸附能力为276.24 mg/g，优于文献中报道的其他吸附剂。热力学研究证实了吸附的放热、自发和物理吸附性质，动力学和等温线模型表明吸附符合拟一阶模型，符合Langmuir等温线。纳米复合材料还表现出良好的再生和可重复使用性，在多次吸附-脱附循环中保持较高的吸附效率。

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引用次数: 0

Two-component organogel from halogenated peptide: A robust matrix for gel phase colorimetric cyanide sensing 卤化肽的双组分有机凝胶：凝胶相比色氰化物传感的坚固基质

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-21 DOI: 10.1016/j.jics.2025.102371

Suman Kumar Maity , Rajasekar P

Two-component organogel was achieved from dipeptides containing non-proteinogenic p-amino benzoic acid (Paba) and 2-aminoisobutyric acid (Aib). Boc-Paba-Aib-OMe formed weak organogel alone, however, formed stable two-component organogel with Boc-Paba(Br)-Aib-OH in 1:1 M ratio. FE-SEM revealed microcrystalline structures from Boc-Paba-Aib-OMe, however, mature long entangled nanofibers were obtained from two component xerogel. No other peptide and peptide combinations, from the pool of six peptides, resulted any gelation indicating unique molecular recognition. X-ray crystallography of Boc-Paba-Aib-OMe revealed hydrogen bonded two-dimensional sheet like structure. The two-component gel served as a robust matrix for trapping a chemo-dosimeter, affording simple colorimetric cyanide sensing in gel state.

以含有非蛋白源性对氨基苯甲酸（Paba）和2-氨基异丁酸（Aib）的二肽为原料制备双组分有机凝胶。Boc-Paba- aib - ome单独形成弱有机凝胶，而与Boc-Paba(Br)-Aib-OH以1:1的M比形成稳定的双组分有机凝胶。FE-SEM显示了Boc-Paba-Aib-OMe的微晶结构，而双组分干凝胶则获得了成熟的长纠缠纳米纤维。没有其他肽和肽组合，从六个肽池中，产生任何凝胶表明独特的分子识别。Boc-Paba-Aib-OMe的x射线晶体形貌显示出二维氢键片状结构。双组分凝胶作为捕获化学剂量计的坚固基质，在凝胶状态下提供简单的比色氰化物传感。

引用次数: 0

One-pot synthesis of ZnO–Bi2S3 heterojunction for organic pollutant elimination under visible light irradiation 可见光下一锅法合成ZnO-Bi2S3异质结去除有机污染物

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-18 DOI: 10.1016/j.jics.2025.102357

Mano Ganapathy , Subramanian Sakthinathan , Chang-Tang Chang , Viswanathan Alagan

ZnO–Bi₂S₃ heterojunction was prepared using different molar concentrations of Bi₂S₃ (0.5, 1.0, and 1.5 M) by microwave irradiation method to enhance the photocatalytic activity under visible light irradiation. XRD analysis confirms that ZnO and Bi₂S₃ exhibit in hexagonal (wurtzite) and orthorhombic phases, respectively. SEM analysis revealed the morphological variations due to the variations of Bi₂S₃ molar concentrations. ZnO–Bi₂S₃ (1.0 M) heterojunction exhibited nano-fence-like morphology. The EDS analysis confirms the presence of Zn, O, Bi, and S elements. Further, the confirmation of ZnO–Bi₂S₃ heterojunction formation was analyzed via FEG-TEM and XPS results. The UV–visible diffuse reflectance spectrum and PL results revealed that the increasing Bi₂S₃ ratio in the ZnO–Bi₂S₃ heterojunction could improve the visible light response and suppress the rate of exciton recombination, respectively. EIS results show that the ZnO–Bi₂S₃ (1.0 M) exhibited the lowest electron transfer resistance among the other samples. The ZnO–Bi₂S₃(1.0 M) provides efficient aniline degradation under solar light irradiation due to the efficient visible light absorptions and lower photo-generated charge carrier recombination. In addition, ZnO–Bi₂S₃ heterojunction exhibited good stability in organic pollutants degradation up to 5 cycles.

采用微波辐照法制备不同摩尔浓度Bi2S3（0.5、1.0、1.5 M）的ZnO-Bi2S3异质结，增强其在可见光下的光催化活性。XRD分析证实ZnO和Bi2S3分别表现为六方（纤锌矿）相和正交相。SEM分析揭示了Bi2S3摩尔浓度变化导致的形态变化。ZnO-Bi2S3 （1.0 M）异质结呈现纳米栅栏状形貌。EDS分析证实了Zn、O、Bi和S元素的存在。通过FEG-TEM和XPS分析ZnO-Bi2S3异质结的形成。紫外-可见漫反射光谱和PL结果表明，增加ZnO-Bi2S3异质结中Bi2S3的比例可以提高ZnO-Bi2S3的可见光响应，抑制激子复合的速率。EIS结果表明，ZnO-Bi2S3 （1.0 M）样品的电子转移电阻最低。ZnO-Bi2S3 （1.0 M）在太阳光照射下具有高效的苯胺降解性能，这是由于它具有高效的可见光吸收和光生电荷载流子重组。此外，ZnO-Bi2S3异质结对有机污染物的降解稳定性达到5次循环。

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引用次数: 0

Asymmetric zero-gap electrolysis for hydrogen production: A comprehensive experimental assessment of the kinetic-energetic balance 不对称零间隙电解制氢：动力学-能量平衡的综合实验评估

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-18 DOI: 10.1016/j.jics.2025.102356

Abderrahmane Selmani , Kaouther Kerboua

The present study provides a comprehensive experimental assessment of an asymmetric zero-gap Proton Exchange Membrane (PEM) electrolyzer, with the objective of assessing the kinetic-energetic balance during hydrogen production, supported by mechanistic insights. A semi-pilot 5-cell stack equipped with a Nafion 117 membrane was evaluated through transient analysis, polarization segmentation, and a multi-parameter study including voltage (9.5–13.25 V), temperature (26.8–66 °C), electrolyte flow rate (50–1500 mL/min), and water quality (distilled, bi-distilled, fresh and stored reverse osmosis permeate). The optimal operating point was found at 11.5 V, yielding a peak Faradaic efficiency of 96.56 % and an energy efficiency of 62.28 %. Elevated temperatures significantly enhanced current density (more than 100 % increase across a 40 °C rise) but reduced energy efficiency due to increased ohmic losses. Surprisingly, fresh reverse osmosis permeate outperformed bi-distilled water, attributed to its balanced ionic conductivity and improved bubble detachment dynamics at the electrode-electrolyte interface. The mechanistic analysis revealed a fundamental trade-off, increasing current density accelerates hydrogen production but steeply reduces energy efficiency. These findings highlight the critical interplay between voltage, temperature, water quality, and ohmic resistance in optimizing asymmetric zero-gap PEM electrolyzers. The study provides practical guidelines for future design and operation of high-efficiency hydrogen generation systems.

本研究对不对称零间隙质子交换膜（PEM）电解槽进行了全面的实验评估，目的是评估氢生产过程中的动能平衡，并提供机理见解。通过瞬态分析、极化分割、电压（9.5 ~ 13.25 V）、温度（26.8 ~ 66℃）、电解质流速（50 ~ 1500 mL/min）、水质（蒸馏水、双蒸馏水、新鲜水和反渗透水）等多参数研究，对配备Nafion 117膜的半中试5电池堆进行了评价。最佳工作点为11.5 V，峰值法拉第效率为96.56%，能量效率为62.28%。升高的温度显著提高了电流密度（升高40°C时电流密度增加超过100%），但由于欧姆损耗增加而降低了能效。令人惊讶的是，新鲜的反渗透渗透优于双蒸馏水，这归功于其平衡的离子电导率和改善的电极-电解质界面气泡分离动力学。机制分析揭示了一个基本的权衡，增加电流密度加速了氢的产生，但却大大降低了能源效率。这些发现强调了优化非对称零间隙PEM电解槽时电压、温度、水质和欧姆电阻之间的关键相互作用。该研究为未来高效制氢系统的设计和运行提供了实用指导。

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引用次数: 0

Double layer electrodeposition of silver doped Hydroxyapatite-Zirconia on Titanium metal plate 掺银羟基磷灰石-氧化锆在钛金属板上的双层电沉积

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-18 DOI: 10.1016/j.jics.2025.102353

Namrata Tripathy, Subhasmita Swain, Tapash R. Rautray

Titanium implants require surface modification to enhance life expectancy and reduce the rejection rate in the human body. Hydroxyapatite coating on titanium implants is considered a promising approach to enhance the biological activity of metallic implants; however, it has limited bonding strength and is susceptible to bacterial infection. Integrating zirconia and silver into the hydroxyapatite coating can be a distinctive choice to improve the implant's mechanical strength and antibacterial effect. The current study represents the ingenuity of double-layer deposition of zirconium oxide and silver-incorporated hydroxyapatite via the two-step cathodic electrodeposition technique with varying deposition times. All the post-synthesis treatments were performed with different characterizations. Results unveiled that the double-layer coating of zirconia-hydroxyapatite-silver on a titanium substrate achieved excellent cellular attachment, bonding strength, mechanical strength, lower cytotoxicity, and better antibacterial performance. This work highlights the potential of novel multi-layer coating on titanium substrate, with prolonged cathodization time showing better results.

钛植入物需要进行表面修饰，以延长寿命，降低人体排异率。羟基磷灰石涂层是一种很有前途的提高金属种植体生物活性的方法。然而，它的结合强度有限，易受细菌感染。将氧化锆和银结合到羟基磷灰石涂层中可以成为提高种植体机械强度和抗菌效果的独特选择。本研究代表了利用两步阴极电沉积技术在不同沉积时间下制备氧化锆和含银羟基磷灰石双层沉积的独创性。所有合成后处理均采用不同的表征。结果表明，氧化锆-羟基磷灰石-银在钛基体上的双层涂层具有优异的细胞附着力、结合强度、机械强度、较低的细胞毒性和较好的抗菌性能。本工作强调了新型多层涂层在钛基上的潜力，延长阴极时间效果更好。

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引用次数: 0

Fabrication of PVA/ZnO polymer nanocomposite films with dual assessment of UV shielding performance 具有双重紫外线屏蔽性能的PVA/ZnO聚合物纳米复合膜的制备

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-17 DOI: 10.1016/j.jics.2025.102359

B. Sakthi Devi , S. Jayanthi , Indra Sulania

Biodegradable poly(vinyl alcohol) (PVA)-based nanocomposite films embedded with Zinc oxide (ZnO) nanoparticles (2–10 wt%) were fabricated via a facile solution casting method. Scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS) analysis confirmed the dispersion of nanoparticles and their elemental distribution. The optical behaviour and UV-shielding performance of the PVA-ZnO nanocomposite films were evaluated using UV–visible (UV–Vis) spectroscopy. Optical analysis revealed that, compared to pure PVA, the addition of 10 wt% ZnO nanoparticles resulted in a significant reduction in both direct and indirect band gaps, from 4.06 eV to 2.97 eV and from 3.80 eV to 2.24 eV, respectively. High thermal emissivity and wavelength-dependent sheet resistance indicate strong potential for passive radiative cooling, supported by preliminary cooling tests. Films with 10 wt% ZnO blocked 96 % UV-B and 97 % UV-A, with high ultraviolet protecting factor (UPF) values. Sunlight exposure tests further demonstrated the effective UV-shielding performance. DSC analysis showed increased T_g and T_m values, reflecting improved thermal stability. FTIR confirmed the interactions between ZnO nanoparticles and the PVA matrix. Mechanical testing provided tensile strength, elongation at break, and Young's modulus values. Statistical analysis was conducted to ensure the reliability of the experimental data.

采用易溶溶液浇铸法制备了含有2-10 wt%氧化锌纳米颗粒的可生物降解聚乙烯醇（PVA）基纳米复合膜。扫描电镜（SEM）和能谱仪（EDS）分析证实了纳米颗粒的分散性和元素分布。利用紫外可见光谱技术对PVA-ZnO纳米复合膜的光学性能和紫外屏蔽性能进行了评价。光学分析表明，与纯PVA相比，添加10% wt% ZnO纳米粒子可显著减小直接带隙和间接带隙，分别从4.06 eV和3.80 eV减小到2.24 eV。高热辐射率和波长相关的薄片电阻表明被动辐射冷却的强大潜力，初步冷却测试支持。ZnO含量为10 wt%的薄膜可阻挡96%的UV-B和97%的UV-A，具有较高的紫外线防护系数（UPF）。阳光照射试验进一步证明了有效的紫外线屏蔽性能。DSC分析显示Tg和Tm值增加，反映了热稳定性的提高。FTIR证实了ZnO纳米粒子与PVA基体之间的相互作用。力学测试提供了抗拉强度、断裂伸长率和杨氏模量值。为保证实验数据的可靠性，对实验数据进行了统计分析。

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引用次数: 0

Eco-friendly extraction of nano alumina from aluminium foil: Characterization and antibacterial study 从铝箔中环保提取纳米氧化铝：表征及抗菌研究

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-17 DOI: 10.1016/j.jics.2025.102360

Reem Hilal Almamari, Geetha Devi, Safiya Mohammed Hamdan Al Rubaii, Sara Badar Nasser Mohammed Al Jassasi, AAisha AAmir Mohammed Amur Al Ghaithi, Ragavesh Dhandapani

The worldwide production of waste aluminum foil has touched almost 80 Mt (Million tons) during the year 2023 and it is expected to reach up to 110 Mt by the end of 2040. The disposal of used aluminium foils into landfills generates severe environmental distress. The possible way to manage the discarded aluminum foil is to reprocess it by transforming into value added product thereby reducing the environmental impact. The environmentally friendly extraction of alumina nano powder from waste aluminum foil is an economically viable and promising alternative to aluminium. Hence, this research attempted an innovative and sustainable approach to reprocess the waste aluminium foil and transforming into alumina (Al₂O₃) nano powder through a facile, green, and eco-friendly process. The extraction of alumina was performed by green extraction technique using citric acid and glycerol as green solvents. The final product was characterized using Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray analysis (EDX), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and X-Ray Diffraction (XRD). The resulting nano alumina powder was successfully applied in the antibacterial activity studies against Escherichia coli by agar disk-diffusion method and it was noted that the nano alumina exhibited antibacterial efficacy against Escherichia coli. This novel research offers a clean environment by reducing the waste and enhancing resource efficiency ensuring alignment with global sustainability goals and circular economy.

2023年，全球废铝箔产量已接近8000万吨（万吨），预计到2040年底将达到1.1亿吨。把用过的铝箔弃置于堆填区，对环境造成严重危害。管理废弃铝箔的可能方法是将其转化为增值产品，从而减少对环境的影响。从废铝箔中提取氧化铝纳米粉是一种经济可行且有前景的铝替代品。因此，本研究尝试了一种创新和可持续的方法，通过简单、绿色、环保的工艺将废铝箔再加工成氧化铝（Al2O3）纳米粉末。采用绿色萃取技术，以柠檬酸和甘油为绿色溶剂提取氧化铝。通过动态光散射（DLS）、扫描电子显微镜（SEM）、能量色散x射线分析（EDX）、傅里叶变换红外光谱（FTIR）、热重分析（TGA）、差示扫描量热法（DSC）和x射线衍射（XRD）对最终产物进行了表征。利用琼脂盘扩散法成功地将纳米氧化铝粉末应用于对大肠杆菌的抑菌活性研究，结果表明纳米氧化铝对大肠杆菌具有抑菌作用。这项新颖的研究通过减少浪费和提高资源效率，确保与全球可持续发展目标和循环经济保持一致，提供了一个清洁的环境。

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引用次数: 0

Hydrothermal-assisted synthesis of TiO2 and Cd-doped TiO2 elongated nanorods for hydrolytic degradation of polyethylene terephthalate microplastics via advanced oxidation processes 水热辅助合成二氧化钛和镉掺杂二氧化钛细长纳米棒，用于高级氧化工艺水解降解聚对苯二甲酸乙二醇酯微塑料

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-17 DOI: 10.1016/j.jics.2025.102352

Shafeeq Suhail Mohamed Shajidha , Surekhaa Sudha Thiyagarajan , Anbarasi Karunanithi

Polyethylene terephthalate (PET) microplastics (≤5 mm) increasingly pollute aquatic and terrestrial environments, posing a toxicological risk such as growth disruption, metabolic disorders, and neuro-developmental delays. This study presents the detailed characterization of TiO₂ & TiO₂/Cadmium (Cd) doped nano-rod based photocatalyst for PET degradation using an advanced oxidation treatment. Engineered TiO₂ & Cd-doped TiO₂ semiconductor photocatalyst were synthesized via a hydrothermal-assisted/wet impregnation method. The resulting nano-rod were characterized to examine the physico-chemical, morphological and optical properties using different analytical techniques and degradation were assessed via carbonyl index analysis using Fourier transform infrared spectroscopy. TiO₂/Cd doped nano-photocatalyst synthesized at a relatively low temperature (<200 °C) with average uniform particle size of 22.51 nm, demonstrated superior PET degradation efficiency of 15 ± 0.98 % over 80 h of irradiation period at p^H 5. This represents a significant improvement compared to pure TiO₂, which achieved only 10 ± 0.5 % degradation, attributed due to reduction in bandgap caused by cadmium doping, which improves photocatalytic activity through functionalization effects. This research underscores the potential of structured semiconductor material for effective Polyethylene terephthalate (PET) microplastic degradation from aqueous environment and highlights their role in advancing sustainable environmental remediation strategies.

聚对苯二甲酸乙二醇酯（PET）微塑料（≤5毫米）越来越多地污染水生和陆地环境，造成生长中断、代谢紊乱和神经发育迟缓等毒理学风险。本研究采用高级氧化处理技术详细表征了TiO2/镉（Cd）掺杂纳米棒光催化剂用于PET降解。采用水热辅助/湿浸渍法制备了掺杂cd的TiO2半导体光催化剂。利用不同的分析技术对所得纳米棒进行了物理化学、形态和光学性质的表征，并利用傅里叶变换红外光谱通过羰基指数分析评估了降解情况。在相对较低的温度（<200℃）下合成的TiO2/Cd掺杂纳米光催化剂，平均均匀粒径为22.51 nm，在pH 5下辐照80 h， PET降解效率为15±0.98%。与纯TiO2相比，这是一个显著的改进，纯TiO2的降解率仅为10±0.5%，这是由于镉掺杂减少了带隙，通过官能化效应提高了光催化活性。本研究强调了结构半导体材料在水环境中有效降解聚对苯二甲酸乙二醇酯（PET）微塑料的潜力，并强调了它们在推进可持续环境修复策略中的作用。

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引用次数: 0

Pulling down Pb2+ from aqueous media through ZnO@SnO2@ZrO2 nanocomposite 通过ZnO@SnO2@ZrO2纳米复合材料从水介质中拉出Pb2+

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-17 DOI: 10.1016/j.jics.2025.102361

Hajo Idriss , Khalid H. Ibnaouf , Osamah Aldaghri , Abbas I. Alakhras , M.A. Ibrahem , Abuzar Albadri , Mukhtar Ismail , A. Modwi

ZnO@SnO₂@ZrO₂ nanocomposite was synthesized via a mechanochemical method and evaluated for Pb²⁺ ion removal from aqueous solutions under varying initial concentrations, pH levels, and contact times. Structural and surface characteristics were confirmed by XRD, FTIR, XPS, BET, and SEM/EDX analysis. The nanocomposite maintained high adsorption efficiencies across the tested concentration range, from 85.10 % at 15 mg/L to 94.14 % at 200 mg/L, with a similar value of 92.33 % in a separate trial. Removal efficiency increased with pH, rising from 18 % at pH 1–61 % at pH 8, highlighting the competitive effect of H⁺ ions at lower pH. Adsorption occurred rapidly, reaching 82.83 % within 5 min and nearly 99 % at equilibrium. Isotherm analysis indicated that the Langmuir model best fit the data (R² = 0.9423), with a maximum adsorption capacity (Q_max) of 280.68 mg/g, whereas the Freundlich model (R² = 0.9075) suggested heterogeneous surface sites. Kinetic modeling indicated that the pseudo-first-order model (R² = 0.9722) best described the adsorption mechanism, implying that physisorption is the dominant process. The nanocomposite exhibited good reusability, with adsorption efficiency decreasing from 99.4 % in the first cycle to 85.7 % after five cycles. These results demonstrate that the ZnO@SnO₂@ZrO₂ nanocomposite possesses high stability, substantial adsorption capacity, and strong potential as a sorbent for Pb²⁺ removal in water treatment applications.

ZnO@SnO2@ZrO2纳米复合材料通过机械化学方法合成，并在不同初始浓度、pH值和接触时间下对水溶液中Pb2+离子的去除效果进行了评价。通过XRD， FTIR， XPS， BET和SEM/EDX分析确定了结构和表面特征。在测试的浓度范围内，纳米复合材料保持了很高的吸附效率，从15 mg/L时的85.10%到200 mg/L时的94.14%，在单独的试验中也达到了相似的92.33%。随着pH值的增加，去除率从pH值的18%上升到pH值8时的61%，突出了H+离子在较低pH下的竞争作用。吸附发生迅速，在5分钟内达到82.83%，达到平衡时接近99%。等温线分析结果表明，Langmuir模型拟合最佳（R2 = 0.9423），最大吸附量（Qmax）为280.68 mg/g， Freundlich模型（R2 = 0.9075）表明表面位点呈非均质分布。动力学模拟结果表明，拟一阶吸附模型（R2 = 0.9722）最能描述吸附机理，表明吸附过程以物理吸附为主。纳米复合材料具有良好的可重复使用性，吸附效率从第一次循环时的99.4%下降到第5次循环后的85.7%。结果表明，ZnO@SnO2@ZrO2纳米复合材料具有较高的稳定性和较强的吸附能力，在水处理应用中具有很强的吸附Pb2+的潜力。

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引用次数: 0

Morphological characterization of ultrafine polyamide 6 nanofiber membranes developed by pilot-scale solution electro-blowing techniques 中试溶液电吹法制备的超细聚酰胺6纳米纤维膜的形态表征

IF 3.4 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society

Pub Date : 2025-12-16 DOI: 10.1016/j.jics.2025.102362

Abrar Ahamad, Gaurav Tiwari, Durvijay Singh, Ravindra Kumar, Sandip Patil

This work explores the morphological properties of electrospun ultrafine polyamide 6 (PA6) nanofiber membranes developed through pilot-scale solution electro-blowing techniques. Field Emission Scanning Electron Microscopy (FESEM) indicates the nanofibers homogeneity and ultrafine structure, while Energy Dispersive X-ray Spectroscopy (EDX) confirms their elemental composition and distribution. The FESEM study reveals a uniform fiber diameter and smooth surface morphology, indicating high-quality nanofiber production. EDX analysis confirms the presence of key elements, ensuring the compositional integrity of PA6. These findings highlight the superiority of electro-blowing over electrospinning in producing high-performance nanofiber membranes suitable for a wide range of applications, including battery separators and filtration systems.

本研究探讨了通过中试溶液电吹技术制备的超细聚酰胺6 （PA6）纳米纤维膜的形态特性。场发射扫描电镜（FESEM）表征了纳米纤维的均匀性和超细结构，能量色散x射线能谱（EDX）表征了纳米纤维的元素组成和分布。FESEM研究表明，纤维直径均匀，表面形貌光滑，表明生产出高质量的纳米纤维。EDX分析证实了关键元素的存在，确保了PA6的成分完整性。这些发现突出了电吹比静电纺丝在生产高性能纳米纤维膜方面的优势，适用于广泛的应用，包括电池分离器和过滤系统。

引用次数: 0