Materials最新文献_第8页

In Situ Growth of CoS Nanosheets on Carbon Fiber Surfaces to Enhance the Interfacial Properties of Carbon Fiber/Norbornene Polyimide Composites. 碳纤维表面原位生长CoS纳米片以增强碳纤维/降冰片烯聚酰亚胺复合材料的界面性能。

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102334

Guoqiang Kong, Jianshun Feng, Fengjie Qi, Meng Shao, Qiubing Yu, Guang Yu, Xin Ren, Wenjie Yuan, Qifen Wang, Wenbo Liu, Xiang Zhao, Dayong Li, Xuejun Hou, Bo Zhu

{"title":"In Situ Growth of CoS Nanosheets on Carbon Fiber Surfaces to Enhance the Interfacial Properties of Carbon Fiber/Norbornene Polyimide Composites.","authors":"Guoqiang Kong, Jianshun Feng, Fengjie Qi, Meng Shao, Qiubing Yu, Guang Yu, Xin Ren, Wenjie Yuan, Qifen Wang, Wenbo Liu, Xiang Zhao, Dayong Li, Xuejun Hou, Bo Zhu","doi":"10.3390/ma18102334","DOIUrl":"10.3390/ma18102334","url":null,"abstract":"This study presents a novel method for altering the surface properties of carbon fiber (CF) to improve the bonding strength at its interface with norbornene-polyimide (PI-NA) resin. Cobaltous sulfide (CoS) nanosheets were successfully synthesized on the CF surface using a solvothermal method combined with a chemical sulfidation process. The modification increased the specific surface area and surface roughness of the CFs, enhancing the interfacial mechanical lock-in effect between the fibers and the resin. This facilitated effective load transfer between the resin and the fibers, thereby significantly improving the interfacial strength of CF-reinforced polymers (CFRPs). The experimental findings showed that after solvothermal treatment with a precursor solution of 0.006 g/mL for 4.5 h, vertical CoS nanosheets were successfully grown on the CF surface. The interlaminar shear strength (ILSS) and interfacial shear strength (IFSS) of the modified CF reached 60.03 MPa and 83.27 MPa, respectively, representing increases of 19.49% and 27.01% compared to untreated fiber composites. This research demonstrates that this method is simple to apply and promising in terms of industrial scalability.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113463/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Modulation of the Pore Structure in Porous Carbon by Metal Salts and Its Application for Joining Silicon Carbide Ceramics. 金属盐对多孔碳孔结构的调制及其在碳化硅陶瓷中的应用。

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102336

Xishi Wu, Zehua Liu, Bingbing Pei, Haibo Wu, Zhengren Huang

{"title":"The Modulation of the Pore Structure in Porous Carbon by Metal Salts and Its Application for Joining Silicon Carbide Ceramics.","authors":"Xishi Wu, Zehua Liu, Bingbing Pei, Haibo Wu, Zhengren Huang","doi":"10.3390/ma18102336","DOIUrl":"10.3390/ma18102336","url":null,"abstract":"In this work, the metal salts were introduced into the resin-solvent gel system to leverage their ortho-substitution effect, thereby accelerating the polymerization-induced phase separation process. Subsequent in-situ carbonization resulted in the preparation of porous carbon materials with three-dimensional interconnected pores. By precisely tuning the parameters of the resin-solvent-metal ion system, control over the pore structure of the porous carbon was achieved, with a porosity range of 16.5% to 66.5% and a pore diameter range of 8 to 248 nm. The addition of metallic salts can simply and effectively increase the pore structure after carbonization, making the infiltration of molten silicon easier. This is beneficial to the joining process of silicon carbide ceramics. Based on these findings, a high-reliability joining technique for large-sized (135 mm × 205 mm) silicon carbide ceramics was developed. The resulting interlayer was dense and defect-free, exhibiting a joining strength of 309 ± 33 MPa and a Weibull modulus of 10.67. These results highlight the critical role of structured porous media in advancing the field of large-sized ceramic joining.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113163/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ferroelectric Smectic Liquid Crystalline Materials with Different Degree of Chirality. 具有不同手性度的铁电性近晶液晶材料。

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102343

Michał Czerwiński, Mateusz Filipow, Klaudia Łuczak, Dorota Węgłowska

{"title":"Ferroelectric Smectic Liquid Crystalline Materials with Different Degree of Chirality.","authors":"Michał Czerwiński, Mateusz Filipow, Klaudia Łuczak, Dorota Węgłowska","doi":"10.3390/ma18102343","DOIUrl":"10.3390/ma18102343","url":null,"abstract":"Ferroelectric liquid crystals (FLCs) are key materials for high-speed electro-optical applications, yet achieving optimal properties over a broad temperature range down below room temperature remains a challenge. This study presents a novel series of systematically designed FLC mixtures, incorporating components with three degrees of chirality-achiral systems, with one center of chirality and with two centers of chirality-to optimize the mesomorphic stability, electro-optical response, and physicochemical properties. The strategic doping by chiral components up to a 0.2 weight fraction extends the temperature range of the ferroelectric phase while lowering the melting temperature. Notably, mixtures containing two chiral centers exhibit shorter helical pitches, while increasing chirality enhances the tilt angle of the director and spontaneous polarization. However, in a mixture containing all three types of chirality (CchM), spontaneous polarization decreases due to opposing vector contributions. Switching time analysis reveals that a system with achiral components and those with two centers of chirality (A-BchM) exhibits the fastest response, while CchM demonstrates only intermediary behavior, caused by its high rotational viscosity. Among all formulations, those containing compounds with two centers of chirality display the most favorable balance of functional properties for deformed helix ferroelectric liquid crystal (DHFLC) applications. One such mixture achieves the lowest melting temperature reported for DHFLC-compatible FLCs, enabling operation at sub-zero temperatures. These findings pave the way for next-generation electro-optical devices with enhanced performance and appropriate environmental stability.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113150/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Approach for the Static Design of Arc-Brazed Fillet Welds from CuAl7 on Low-Alloyed Constructional Steel. 低合金结构钢CuAl7弧焊角焊缝静力设计方法

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102339

Benjamin Ripsch, Knuth-Michael Henkel

{"title":"Approach for the Static Design of Arc-Brazed Fillet Welds from CuAl7 on Low-Alloyed Constructional Steel.","authors":"Benjamin Ripsch, Knuth-Michael Henkel","doi":"10.3390/ma18102339","DOIUrl":"10.3390/ma18102339","url":null,"abstract":"This publication covers experimental investigations on the design resistance of arc-brazed fillet welds (CuAl7) on low-alloyed structural steel (S355) subject to predominantly static loading and regarding steel construction regulations (Eurocode). In current steel construction regulations, there is no standardized design approach for arc-brazed fillet welds available, so arc-brazed connections are rarely used despite the benefits they offer in several regards compared to conventionally welded connections. Therefore, a resistance model for arc-brazed fillet welds was calibrated based on tensile tests that were conducted on gas metal arc-brazed specimens with transverse and longitudinal fillet welds. Based on the statistical evaluation of the test results according to Annex D of EN 1990, a newly determined correlation factor βb is proposed, which can be used for the static design of arc-brazed fillet welds made of CuAl7. This approach leads to a significantly higher calculated design resistance than previous non-standardized design approaches allowed. Also, it was found that the failure behavior of the fillet welds is critical for the design resistance of the joints and that there is a need for further investigations with regard to a targeted joint failure, which, analogous to welded fillet welds, should take place along the throat of the weld and not along the less resistant diffusion zone of the joint. Thus, the results underscore the potential for the use of arc-brazed connections in steel construction in regard to their load-bearing capacity, but also highlight the necessity of continued research regarding factors influencing their structural integrity.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12112999/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain-Induced Modifications of Thin Film Silicon Membranes Through Physical Bending. 通过物理弯曲应变诱导的硅薄膜改性。

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102335

Eleni Margariti, Jochen Bruckbauer, Aimo Winkelmann, Benoit Guilhabert, Naresh-Kumar Gunasekar, Carol Trager-Cowan, Robert Martin, Michael Strain

{"title":"Strain-Induced Modifications of Thin Film Silicon Membranes Through Physical Bending.","authors":"Eleni Margariti, Jochen Bruckbauer, Aimo Winkelmann, Benoit Guilhabert, Naresh-Kumar Gunasekar, Carol Trager-Cowan, Robert Martin, Michael Strain","doi":"10.3390/ma18102335","DOIUrl":"10.3390/ma18102335","url":null,"abstract":"Silicon, being the fundamental material for modern semiconductor devices, has seen continuous advancements to enhance its electrical and mechanical properties. Strain engineering is a well-established technique for improving the performance of silicon-based devices. In this paper, we propose a simple method for inducing and permanently maintaining strain in silicon through pure physical bending. By subjecting the silicon substrate to a controlled bending process, we demonstrate the generation of strain levels that persist even after the removal of external stress, with a maximum strain value of 0.4%. We present a comprehensive study of the mechanics behind this phenomenon, a full finite element mechanical model, and experimental verification of the bending-induced strain in Si membranes using electron backscatter diffraction measurements. Our findings show the potential of this approach for strain engineering in high-performance silicon-based technologies without resorting to complex and expensive fabrication techniques.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113378/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-Scale Modeling and Damage Mechanisms of Asphalt Pavements Under Coupled Salt-Thermal-Mechanical Effects. 盐-热-力耦合作用下沥青路面多尺度建模及损伤机理

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102337

Jin Ma, Jiaqi Chen, Mingfeng Tang, Yu Liu

{"title":"Multi-Scale Modeling and Damage Mechanisms of Asphalt Pavements Under Coupled Salt-Thermal-Mechanical Effects.","authors":"Jin Ma, Jiaqi Chen, Mingfeng Tang, Yu Liu","doi":"10.3390/ma18102337","DOIUrl":"10.3390/ma18102337","url":null,"abstract":"Salts can have detrimental effects on asphalt pavements, leading to permanent damage that compromises their durability and sustainability. This study investigates the damage mechanisms of asphalt pavements under coupled salt-thermal-mechanical effects using multi-scale modeling. Pull-off and semicircular bending (SCB) tests were conducted to determine material parameters and validate numerical models. Experimental data demonstrated that after 48 h of salt treatment at -10 °C, specimens exhibited reductions in cohesive strength ranging from 23.5% to 26% and adhesive strength decreasing by 25% to 44% compared to untreated controls. More severe degradation was observed at 0 °C, with cohesive strength diminishing by up to 63.8% and adhesive strength declining by up to 71.6%. A multi-scale finite element (FE) pavement model incorporating cohesive zone modeling (CZM) was developed to simulate damage behavior within asphalt concrete. Salt diffusion analysis revealed limited penetration depth within short exposure periods, and results showed that salt penetration reached only about 10 mm into the pavement layers after 48 h. Results indicated significant reductions in adhesive and cohesive strengths due to salt exposure, with damage susceptibility increasing under combined thermal fluctuations and mechanical loading. Additionally, the effects of moving load magnitude and speed on pavement damage were examined, showing higher damage accumulation at lower speeds and heavier loads. This research provides insights into pavement deterioration mechanisms, contributing to improved durability and maintenance strategies for asphalt pavements in salt environments.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113470/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144160038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Steam-Assisted Ammonolysis of MoO₂ as a Synthetic Pathway to Oxygenated δ-MoN. 蒸汽辅助氨解MoO2合成氧合δ-MoN的途径

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102340

Shobhit Pandey, Elise A Goldfine, Shriya Sinha, Chi Zhang, Jill K Wenderott, Lucien Kaczmarczyk, Ksawery Dabrowiecki, Vinayak P Dravid, Gabriela B González, Sossina M Haile

{"title":"Steam-Assisted Ammonolysis of MoO2 as a Synthetic Pathway to Oxygenated δ-MoN.","authors":"Shobhit Pandey, Elise A Goldfine, Shriya Sinha, Chi Zhang, Jill K Wenderott, Lucien Kaczmarczyk, Ksawery Dabrowiecki, Vinayak P Dravid, Gabriela B González, Sossina M Haile","doi":"10.3390/ma18102340","DOIUrl":"10.3390/ma18102340","url":null,"abstract":"A common route for the synthesis of molybdenum nitrides is through the temperature-programmed reaction of molybdenum oxides with NH3, or ammonolysis. In this work, the role of precursor phase, gas phase chemistry (impact of H2O), and temperature profile on the reaction outcome (700 °C) was examined, which resulted in varying amounts of MoO2, H2MoO5, and the nitride phases-cubic γ (nominally Mo2N) and hexagonal δ (nominally MoN). The phase fraction of the δ phase increased with precursor in the sequence MoO2 > MoO3 > H2MoO5. Steam in the reaction gas also favored the production of δ over γ, but with too much steam, MoO2 was obtained in the product. Synthesis conditions for obtaining nearly phase-pure δ were identified: MoO2 as the precursor, 2% H2O in the gas stream, and a moderate heating rate (3 °C/min). In situ X-ray diffraction provided insights into the reaction pathway. Extensive physico-chemical analysis of the δ phase, including synchrotron X-ray and neutron diffraction, electron microscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, and prompt gamma activation analysis, revealed its stoichiometry to be MoO0.108(8)N0.892(8)H0.012(5), indicating non-trivial oxygen incorporation. The presence of N/O ordering and an impurity phase Mo5N6 were also revealed, detectable only by neutron diffraction. Notably, a computationally predicted MoON phase (doi: 10.1103/PhysRevLett.123.236402), of interest due to its potential to display a metal-insulator transition, did not appear under any reaction condition examined.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113219/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microscopic Distribution of Quaternary Ammonium Salt Organic Modifiers in the Interlayer Space of Montmorillonite: Molecular Simulation Study. 季铵盐有机改性剂在蒙脱土层间空间的微观分布：分子模拟研究。

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102338

Wenxi Yu, Xijian Yi, Jianwei Yan, Juan Cheng, Siyu Ou, Qiong Xue

{"title":"Microscopic Distribution of Quaternary Ammonium Salt Organic Modifiers in the Interlayer Space of Montmorillonite: Molecular Simulation Study.","authors":"Wenxi Yu, Xijian Yi, Jianwei Yan, Juan Cheng, Siyu Ou, Qiong Xue","doi":"10.3390/ma18102338","DOIUrl":"10.3390/ma18102338","url":null,"abstract":"This study employs molecular dynamics simulations to construct designed unit cells of organic montmorillonite (OMMT) modified with four types of quaternary ammonium salts. The effects of modifier type and quantity on the basal spacing of montmorillonite (MMT) were analyzed. Molecular motion, morphology, interaction energy (Eint), and hydrogen bonding interactions were investigated to elucidate the molecular-level mechanisms between modifiers and MMT. The results indicate that the organic modification of MMT proceeds in three distinct stages: the filled stage, saturated stage, and supersaturated stage. During the filled stage, the basal spacing remains largely unchanged while Eint increases rapidly. In the saturated stage, the basal spacing expands as the growth rate of Eint slows. In the supersaturated stage, the basal spacing continues to increase while Eint stabilizes. The transition from the filled to saturated stage is governed by the van der Waals space occupied by the modifiers. Within the MMT interlayer, the modifiers adopt a bilayer morphology, with the nitrogen atom heads adhering to the MMT surfaces and the tails self-assembling. These findings provide theoretical insights into the basal spacing expansion and organic modification mechanisms of MMT, thereby facilitating improved material compatibility.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113502/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boosting the Performance of Electrocatalytic NO Reduction to NH₃ by Decorating WS₂ with Single Transition Metal Atoms: A DFT Study. 单过渡金属原子修饰WS2提高NO电催化还原NH3性能的DFT研究

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-17 DOI: 10.3390/ma18102341

Mamutjan Tursun, Ayxamgul Abduryim, Chao Wu

{"title":"Boosting the Performance of Electrocatalytic NO Reduction to NH3 by Decorating WS2 with Single Transition Metal Atoms: A DFT Study.","authors":"Mamutjan Tursun, Ayxamgul Abduryim, Chao Wu","doi":"10.3390/ma18102341","DOIUrl":"10.3390/ma18102341","url":null,"abstract":"Ammonia (NH3) is a crucial feedstock in chemical manufacturing. The electrocatalytic NO reduction reaction (eNORR) to NH3 represents a promising alternative method for the green production of NH3 and for environmental management. This study presents a comprehensive investigation of eNORR properties of single transition metal atoms deposited on WS2 nanosheets (TM@WS2). Our results indicate that 19 single TM atoms exhibit strong thermal stability. Among these, five specific TM@WS2 catalysts-Ti, Mn, Co, Zr, and Hf-demonstrate remarkable eNORR activity, with limiting potentials of 0, -0.19, -0.26, 0, and -0.15 V, respectively. These catalysts effectively suppress the formation of byproducts (N2O/N2) and the hydrogen evolution reaction (HER), thereby ensuring high NH3 selectivity. Our theoretical study confirms that TM@WS2 catalysts are highly promising for achieving high activity, selectivity, and stability in eNORR, providing valuable insights for future experimental investigations into efficient NH3 production.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113338/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetics and Thermodynamics of Pb(II), Zn(II), and Cd(II) Adsorption from Aqueous Solutions onto Activated Biochar Obtained from Tobacco Waste. 烟草废活性炭吸附Pb（II）、Zn（II）和Cd（II）的动力学和热力学研究

IF 3.1 3区材料科学

Materials Pub Date : 2025-05-16 DOI: 10.3390/ma18102324

Beata Jabłońska, Paweł Jabłoński, Jerzy Gęga

{"title":"Kinetics and Thermodynamics of Pb(II), Zn(II), and Cd(II) Adsorption from Aqueous Solutions onto Activated Biochar Obtained from Tobacco Waste.","authors":"Beata Jabłońska, Paweł Jabłoński, Jerzy Gęga","doi":"10.3390/ma18102324","DOIUrl":"10.3390/ma18102324","url":null,"abstract":"Waste tobacco stems from the tobacco industry were used to obtain activated carbon by thermal conversion and chemical activation with KOH. The aim was to investigate its adsorption ability towards Zn(II), Cd(II), and Pb(II) from aqueous solutions. Fundamental physical and chemical properties were investigated, and the point of zero charge pH was detected. The results showed that the obtained activated carbon was characterized by a high specific surface area, pore volume, and negative surface charge, which could make it an efficient metal adsorbent. In the next step, the optimal adsorption conditions were determined using Central Composite Design. Finally, the adsorption kinetics and thermodynamics were studied. The adsorption rate is very high for Pb(II) and Cd(II), whereas it is noticeably lower for Zn(II). The negative value of Gibbs free energy change (∆G) confirmed that the adsorption process of the tested metal ions is feasible and proceeds spontaneously. The thermodynamics indicate that the adsorption of zinc and lead on the tested carbon is an exothermic process, and for cadmium, this process is endothermic.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 10","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113365/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0