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Simple synthesis of multifunctional N, S-doped carbon quantum dots for Cu2⁺ ion detection and luminescent applications 简单合成多功能N、s掺杂碳量子点,用于Cu2 +离子检测和发光应用
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-17 DOI: 10.1007/s11696-025-04158-6
Qizheng Dong, Xiangyu Ren, Huimin Xie, Ling He
{"title":"Simple synthesis of multifunctional N, S-doped carbon quantum dots for Cu2⁺ ion detection and luminescent applications","authors":"Qizheng Dong,&nbsp;Xiangyu Ren,&nbsp;Huimin Xie,&nbsp;Ling He","doi":"10.1007/s11696-025-04158-6","DOIUrl":"10.1007/s11696-025-04158-6","url":null,"abstract":"<div><p>This study successfully synthesized multifunctional nitrogen- and sulfur-doped carbon quantum dots (N, S-CQDs) using thiobenzamide and citric acid as precursors through a hydrothermal process under neutral conditions. The synthesized N, S-CQDs exhibited an average diameter of approximately 15 nm, which is notably larger than that of unmodified CQDs. Unlike conventional CQDs, the N, S-CQDs demonstrated stable yellow fluorescence that remained invariant under different excitation wavelengths. Furthermore, their surface functional groups endowed them with multifunctional luminescent properties. Specifically, these functional groups enhanced the sensitivity toward Cu<sup>2+</sup>, enabling the N, S-CQDs to exhibit a response to Cu<sup>2+</sup> with extremely low detection limit (LOD) of 0.197684 and 0.149791, thus demonstrating excellent Cu<sup>2+</sup> detection performance. Additionally, the N, S-CQDs displayed unique yellow luminescence with a quantum yield of 28.05%, rendering them a promising alternative to YAG: Ce<sup>3</sup>⁺ for applications in white light LEDs and fluorescent anti-counterfeiting labels. The fabricated simple WLED achieves an EQE of 32.39% with chromaticity coordinates of (0.3299, 0.2718). Given the simplicity and efficiency of the synthesis method, these N, S-CQDs hold significant potential for diverse applications across multiple fields.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5861 - 5873"},"PeriodicalIF":2.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the physical properties of polyhydroxybutyrate via eccentricity-based topological indices 利用偏心率拓扑指数探索聚羟基丁酸酯的物理性质
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-17 DOI: 10.1007/s11696-025-04153-x
Usman Babar, Asim Naseem, Hani Shaker, Muhammad Kamran Siddiqui
{"title":"Exploring the physical properties of polyhydroxybutyrate via eccentricity-based topological indices","authors":"Usman Babar,&nbsp;Asim Naseem,&nbsp;Hani Shaker,&nbsp;Muhammad Kamran Siddiqui","doi":"10.1007/s11696-025-04153-x","DOIUrl":"10.1007/s11696-025-04153-x","url":null,"abstract":"<div><p>The biopolymers known as polyhydroxyalkanoates (PHA’s) are composed of a variety of microorganisms that are responsible for their preparation and composition. These naturally occurring polymers possess certain physical characteristics that are identical to those of plastics derived from petroleum, such as polypropylene. Based on this information, it can be deduced that these natural polymers possess the capability of functioning as an alternative to plastics that are generated from petroleum. Polyhydroxybutyrate (PHB), polyhydroxyvalerate, and their copolymer (PHBV) are the PHA’s that are found in the greatest abundance in a variety of microorganisms from across the world. In this research, we have made a chemical structure model of PHB and determined its eccentricity tables and also calculated eccentricity-based TI’s. For PHB, the computation of eccentricity-based TI’s provides important information about its structural characteristics and possible uses. Additionally, the application of TI’s may improve polymer performance prediction models, directing the future development of more sustainable and effective materials.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5785 - 5798"},"PeriodicalIF":2.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Monocarbonyl modifications of curcumin: an overview of structure–activity relationship study as anti-infective agents 姜黄素的单羰基修饰:抗感染药物构效关系研究综述
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-16 DOI: 10.1007/s11696-025-04161-x
Shriya K. Teli, Vasanti M. Suvarna, Arundhati N. Abhyankar
{"title":"Monocarbonyl modifications of curcumin: an overview of structure–activity relationship study as anti-infective agents","authors":"Shriya K. Teli,&nbsp;Vasanti M. Suvarna,&nbsp;Arundhati N. Abhyankar","doi":"10.1007/s11696-025-04161-x","DOIUrl":"10.1007/s11696-025-04161-x","url":null,"abstract":"<div><p>One of the most widely studied polyphenolic compounds of natural origin is curcumin, also known as a diferuloylmethane, derived from the rhizome of <i>Curcuma longa</i> (L.). Over the past few decades, extensive studies for various pharmacological activities such as antibacterial, anticancer, anti-tuberculosis, anti-inflammatory, antifungal, antimalarial, etc., have been reported. However, poor solubility, stability, and rapid metabolism have limited the bioavailability of curcumin. Researchers have developed several strategies to overcome these limitations, including modified delivery systems such as liposomes, niosomes, and nanogels. Chemical modifications have also been explored; one of the particular interests is the development of monocarbonyl analogs of curcumin (MACs). This modification not only increases the stability and efficacy of the derivatives but also improves pharmacological activities. MACs have demonstrated promise in treating various diseases, including Alzheimer’s, cancer, and diabetes. Overall, the development of MACs and other chemical modifications of curcumin offers a promising avenue for improving the pharmacological activities and bioavailability of this natural compound. Hence, this review summarizes the MACs synthesized over the past few decades and the impact of structural modifications therein on the pharmacological activities of these analogs, offering valuable insights for the development of anti-infective agents based on curcumin derivatives.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5593 - 5607"},"PeriodicalIF":2.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual-state emission of anthracene and triphenylamine functionalized E-cyanostilbene derivative with mechanochromic property 具有机械致变色性质的蒽和三苯胺功能化e -氰基苯乙烯衍生物的双态发射
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-16 DOI: 10.1007/s11696-025-04143-z
Gaobin Zhang, Shuyi Yao, Mengjie Miao, Jianli Yan, Fangjie Chen, Jiaxiang Yang
{"title":"Dual-state emission of anthracene and triphenylamine functionalized E-cyanostilbene derivative with mechanochromic property","authors":"Gaobin Zhang,&nbsp;Shuyi Yao,&nbsp;Mengjie Miao,&nbsp;Jianli Yan,&nbsp;Fangjie Chen,&nbsp;Jiaxiang Yang","doi":"10.1007/s11696-025-04143-z","DOIUrl":"10.1007/s11696-025-04143-z","url":null,"abstract":"<div><p>In this work, an anthracene and triphenylamine functionalized <i>E</i>-cyanostilbene derivative (EN-TPA) was designed, synthesized and characterized. EN-TPA possessed excellent dual-state emission (DSE) property, possessing highly efficient emission both in solution and solid state. Meanwhile, the EN-TPA displayed obviously solvatochromic effect due to the intermolecular charge transfer, as confirmed by the Lippert–Mataga equation and quantum chemistry theoretical calculations. In aggregation state, EN-TPA was bright emissive with the solid fluorescence quantum yield (<i>Φ</i><sub><i>f</i></sub>) of 52.2%. Notably, the solid fluorescence of EN-TPA showed a 20 nm red shift after grinding, accompanied by a 4-fold decrease in <i>Φ</i><sub><i>f</i></sub>, attributed to the transition of crystalline to amorphous phase under grinding. Leveraging the reversible mechanochromic, the storage paper device of EN-TPA was fabricated and exhibited a distinct fluorescence change from green to yellow upon mechanical stimulation. Single-crystal X-ray diffraction analysis revealed that the twisted molecular structure of EN-TPA inhibited the π-π stacking and induced the molecule to form loose packing arrangements to achieve bright solid emission and stimulus response property. This work provides a new perspective for designing high-performing DSE molecules.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5533 - 5541"},"PeriodicalIF":2.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of graphitic crystalline structure in highly porous activated carbons derived from rice husk biomass 稻壳生物质制备的高孔活性炭的石墨晶体结构研究
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-14 DOI: 10.1007/s11696-025-04138-w
Brahamdeo Kumar Yadav, Amit Kumar
{"title":"Study of graphitic crystalline structure in highly porous activated carbons derived from rice husk biomass","authors":"Brahamdeo Kumar Yadav,&nbsp;Amit Kumar","doi":"10.1007/s11696-025-04138-w","DOIUrl":"10.1007/s11696-025-04138-w","url":null,"abstract":"<div><p>Rice husk (RH) is a lignocellulosic material obtained from agricultural waste that can be converted into valuable carbon-rich materials through various thermochemical processes. However, its application is limited because some fundamental properties of RH biomass are still under investigation. This study focused on producing activated carbons (ACs) using alkaline chemical treatments, followed by a two-stage carbonization process in a nitrogen (N<sub>2</sub>) gas atmosphere. Three distinct porous carbon materials were produced by varying the carbonization temperature and retention times. These materials are designated as AC-30 M, AC-60 M, and AC-90 M. All samples exhibited highly porous structures and outstanding surface properties. However, there were significant variations in pore geometry, surface area, and crystalline phases are largely dependent on the carbonization temperature and retention times. Ultimate analysis of the porous carbon materials revealed that the fixed carbon percentage increased from 51.2 to 58.4% with longer retention times. The Brunauer–Emmett–Teller (BET) surface area analysis was conducted to evaluate pore radius, pore volume, and active surface area. The results showed that AC-90 M exhibited the maximum pore volume of 0.374 cc/g and the highest surface area of 587.616 m<sup>2</sup>/g. The porous activated carbon materials were analyzed using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FTIR), and Raman spectroscopy. The results indicated the presence of both amorphous structures and graphitic crystalline phases within the well-developed porous structures, which was further confirmed by the International Center for Diffraction Data (ICDD) database.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5451 - 5464"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient oxygen evolution using Ni@C catalysts: electrochemical optimization and long-term stability 使用Ni@C催化剂的高效析氧:电化学优化和长期稳定性
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-14 DOI: 10.1007/s11696-025-04154-w
Ajitha Pandian, Chitra Boobalan, P. Senthil Kumar, Gayathri Rangasamy
{"title":"Efficient oxygen evolution using Ni@C catalysts: electrochemical optimization and long-term stability","authors":"Ajitha Pandian,&nbsp;Chitra Boobalan,&nbsp;P. Senthil Kumar,&nbsp;Gayathri Rangasamy","doi":"10.1007/s11696-025-04154-w","DOIUrl":"10.1007/s11696-025-04154-w","url":null,"abstract":"<div><p>Effective electrocatalysis is vital for advancing renewable energy technology, and the study of hybrid nanomaterials has great potential to improve catalytic performance. A composite design like metallic nickel, onion-like carbon nanoparticles, and Ni@C nanocomposite (Ni@C) was proposed, produced by an easy solvent-free methodology at low temperatures. The produced nanocomposite was verified using Raman, FT-IR (Fourier Transform Infrared Spectra), FE-SEM (Field Emission-Scanning Electron Microscopy), UV–Vis (Ultraviolet Visible spectra), TGA (Thermal Gravimetric Analysis), and XRD (X-ray Diffraction). XRD characterization uses the Debye–Scherrer formula to determine the crystalline size of to produced Ni, C, and Ni@C, which are approximately 28.6, 0.7, and 25.1 nm, respectively. The fabricated Ni@C nanocomposite exhibited consistent XRD patterns and Raman spectra, indicating the preservation of crystallinity and carbon structure. FTIR and Raman spectra with the same wavelength verify the produced Ni@C. The mass loss of the substance was examined by using TGA analysis. FE-SEM analysis revealed morphological features suggesting that the Ni nanoparticles are embedded within an onion-like carbon matrix. The Ni@C nanocomposite showed excellent OER performance with a low overpotential of 210 mV at 10 mA cm⁻<sup>2</sup>, a Tafel slope of 69.5 mV dec⁻<sup>1</sup>, and impressive stability for 16 h at about 88% Faradaic efficiency, demonstrating the synergistic effect of nickel and the carbon matrix on catalytic efficiency and durability. Above all, results demonstrate that the synthesized nanocomposite at low temperatures shows a high performance of electrocatalytic activity for Oxygen Evolution Reaction (OER).</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5799 - 5811"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrodeoxygenation process to obtain green naphtha, kerosene and diesel fractions from mesocarp and kernel oil from Elaeis guineensis fruit 用加氢脱氧工艺从白榆果实中果皮和果仁油中提取绿色石脑油、煤油和柴油馏分
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-14 DOI: 10.1007/s11696-025-04152-y
Fernanda Velázquez-Rodríguez, Felipe Sánchez-Minero, Issis Romero-Ibarra, Ignacio Elizalde-Martínez
{"title":"Hydrodeoxygenation process to obtain green naphtha, kerosene and diesel fractions from mesocarp and kernel oil from Elaeis guineensis fruit","authors":"Fernanda Velázquez-Rodríguez,&nbsp;Felipe Sánchez-Minero,&nbsp;Issis Romero-Ibarra,&nbsp;Ignacio Elizalde-Martínez","doi":"10.1007/s11696-025-04152-y","DOIUrl":"10.1007/s11696-025-04152-y","url":null,"abstract":"<div><p>Hydrodeoxygenation of kernel oil and mesocarp oil, both derived from <i>Elaeis guineensis</i> fruit, extracted in a Mexican industrial plant, was carried out at 350–380 °C, 3 h reaction time, agitation at 800 rpm, using 4 wt% of NiMo activated catalyst and 75 bar initial pressure of hydrogen. The characterization techniques employed to obtain the conversion and bulk properties of the raw materials and liquid products were Proton Nuclear Magnetic Resonance, Simulated Distillation, Fourier Transform Infrared Spectroscopy and X-ray fluorescence spectroscopy; also, density, viscosity and percentage of free fatty acids were accounted for following ASTM methods. The products obtained from kernel oil showed lower density, viscosity, free fatty acid content and sulfur content as well as a better distribution of naphtha, kerosene and diesel-type fractions compared to mesocarp oil HDO products. The selectivity towards the diesel-type fraction was higher in the hydrotreated mesocarp oil products while the residua were systematically higher than the residual cut-off in the kernel oil products, regardless of the reaction temperature. In addition, triglyceride conversion was between 90 and 98%, similar for the reaction products of both kernel and mesocarp oil.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5775 - 5783"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Facile synthesis of ZnONP/carbon-coated-eggshell nanocomposite: fast and efficient adsorbents for amoxicillin sequestration ZnONP/碳包覆蛋壳纳米复合材料的快速合成:用于阿莫西林的快速高效吸附剂
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-14 DOI: 10.1007/s11696-025-04148-8
James Friday Amaku, Okoche Kelvin Amadi, Fanyana M. Mtunzi, Jesse Greener
{"title":"Facile synthesis of ZnONP/carbon-coated-eggshell nanocomposite: fast and efficient adsorbents for amoxicillin sequestration","authors":"James Friday Amaku,&nbsp;Okoche Kelvin Amadi,&nbsp;Fanyana M. Mtunzi,&nbsp;Jesse Greener","doi":"10.1007/s11696-025-04148-8","DOIUrl":"10.1007/s11696-025-04148-8","url":null,"abstract":"<div><p>This article reports the synthesis and characterization of a novel eggshell/carbon/ZnO nanoparticles composite (ECZ) for efficient adsorption of amoxicillin (AMX) from aqueous solution. Systematic batch adsorption tests were conducted to compare and assess the AMX removal efficiency of ECZ with raw eggshell biochar (ESB). The most significant operating parameters, including solution pH, contact time, adsorbent dosage, temperature, and initial AMX concentration, were optimized. Maximum adsorption efficiency occurred at pH 5, and equilibrium was achieved in 80 min. ECZ composite possessed a significantly enhanced adsorption capacity of 37.91 mg g⁻<sup>1</sup> at 313 K, which is nearly double that of ESB (18.73 mg g⁻<sup>1</sup>), illustrating the synergistic effect of ZnO nanoparticles and carbon modification. Equilibrium adsorption analysis according to Freundlich and Langmuir models determined that AMX adsorption on ECZ represented the Freundlich isotherm model, depicting multilayer adsorption over a heterogeneous surface, while ESB exhibited Langmuir representation, signifying monolayer coverage. The kinetic model ratified that pseudo-first-order representation efficiently captured the process of adsorption in both samples. Thermodynamic values (ΔG°, ΔH°, and ΔS°) determined in the temperature interval 298–313 K indicated that the adsorption process was spontaneous, endothermic, and entropy-stimulated with increased randomness at the solid–solution interface. In general, the ECZ composite is an excellent choice as a low-cost, effective, and eco-friendly adsorbent for the removal of pharmaceutical pollutants such as amoxicillin from wastewater, ensuring environmental protection and water purification. </p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5717 - 5732"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11696-025-04148-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainable processing of methylene blue dye-adsorbed Zea mays peel ash biosorbent as a novel heterogeneous catalyst for biodiesel production 亚甲基蓝染料吸附玉米脱皮灰生物吸附剂的可持续处理作为一种新型的生物柴油多相催化剂
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-14 DOI: 10.1007/s11696-025-04083-8
Akshay Prakash, Jerold Manuel
{"title":"Sustainable processing of methylene blue dye-adsorbed Zea mays peel ash biosorbent as a novel heterogeneous catalyst for biodiesel production","authors":"Akshay Prakash,&nbsp;Jerold Manuel","doi":"10.1007/s11696-025-04083-8","DOIUrl":"10.1007/s11696-025-04083-8","url":null,"abstract":"<div><p>This study investigates the circular economy approach of <i>Zea mays</i> peel ash as an adsorbent for methylene blue (MB) dye and as a sustainable renewable heterogeneous green catalyst for the transesterification of waste cooking oil into biodiesel. The adsorption study shows that MB removal was maximum at pH 8 with 89.95% in 60 min. The functional groups and surface morphology of <i>Zea mays</i> peel ash were analysed using FTIR and SEM, respectively. The spent <i>Zea mays</i> peel dye-adsorbed ash was valorized into green catalyst by calcination process at 400 °C for 60 min. The optimization of transesterification reactions is achieved using the Taguchi method. A maximum yield of 95.77% FAME (fatty acid methyl ester) obtained at reaction time (240 min), temperature (65 °C), catalyst load (1.5 wt.%), and methanol-to-oil ratio (4:1). The FAME was purified and characterized through various analyses, including gas chromatography and nuclear magnetic resonance. Overall, this study shows that <i>Zea mays</i> peel ash can used as a promising biosorbent for dye sequestration and a sustainable catalyst for biodiesel production.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"4925 - 4942"},"PeriodicalIF":2.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and characterization of LiNi0.5Mn0.4Co0.1O2 as a cathode material for lithium-ion batteries using the coprecipitation method 锂离子电池正极材料LiNi0.5Mn0.4Co0.1O2的共沉淀法合成与表征
IF 2.5 4区 化学
Chemical Papers Pub Date : 2025-06-13 DOI: 10.1007/s11696-025-04144-y
Yustinus Purwamargapratala, Anne Zulfia, Evvy Kartini, Engkir Sukirman, Mahardika F. Rois, Heri Jodi, Achmad Subhan, Michael Hardian
{"title":"Synthesis and characterization of LiNi0.5Mn0.4Co0.1O2 as a cathode material for lithium-ion batteries using the coprecipitation method","authors":"Yustinus Purwamargapratala,&nbsp;Anne Zulfia,&nbsp;Evvy Kartini,&nbsp;Engkir Sukirman,&nbsp;Mahardika F. Rois,&nbsp;Heri Jodi,&nbsp;Achmad Subhan,&nbsp;Michael Hardian","doi":"10.1007/s11696-025-04144-y","DOIUrl":"10.1007/s11696-025-04144-y","url":null,"abstract":"<p>This study explores the synthesis and electrochemical characterization of LiNi<sub>0.5</sub>Mn<sub>0.4</sub>Co<sub>0.1</sub>O<sub>2</sub> (NMC541) as a cathode material for lithium-ion batteries. Utilizing a coprecipitation method, the research aims to enhance energy storage capacity and thermal stability. The precursor Ni<sub>0.5</sub>Mn<sub>0.4</sub>Co<sub>0.1</sub>(OH)<sub>2</sub> was pyrolyzed and mixed with lithium hydroxide, followed by calcination at temperatures of 700, 800, and 850 °C to optimize phase composition and crystallinity. Morphological and structural characterizations were performed using TEM, SEM, XRD, and Raman spectroscopy. Electrochemical performance was assessed in coin cells through cyclic voltammetry, electrochemical impedance spectroscopy, and charge–discharge tests, revealing significant improvements in energy density and thermal stability under optimized conditions. Notably, the NMC541 sample calcined at 800 °C for 8 h demonstrated a homogeneous particle distribution and relatively uniform particle sizes, corresponding to the highest conductivity value of 5.099 × 10<sup>−3</sup> S·cm<sup>−1</sup>. The average particle size was 129.834 nm, and when assembled in a coin cell, the configuration exhibited a discharge capacity of 97.72 mAh·g<sup>−1</sup> and an efficiency of 74.40% during the 50 cycles charge–discharge testing. Compared to traditional cathode materials like NMC333 (LiNi<sub>0.33</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>O<sub>2</sub>) and NCA (lithium nickel-cobalt-aluminum oxide), NMC541 offers notable advancements. The higher nickel content in NMC541 contributes to increased capacity, while the balanced proportions of manganese and cobalt ensure enhanced structural stability and safety. The comparative analysis highlights that NMC541 provides improved energy density, thermal stability, and cycling performance, making it a formidable candidate for next-generation lithium-ion batteries.</p>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 8","pages":"5543 - 5552"},"PeriodicalIF":2.5,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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