Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.003
Yan Zhang , Jianing Wang , Zihao Lu , Yuanzhen Meng , Xinyuan Wang , Jiahao Yue , Linqing Zhang , Yabing Sun , Xianwei Wang
Bi0.5Na0.5TiO3 (BNT)-based ceramics are promising dielectric energy storage materials owing to their fast charge-discharge capability and environmental friendliness. However, their relatively low energy density and limited breakdown strength hinder their practical application. Herein, (1-x)[0.7BNT-0.3NaNbO3]- x[Sr0.7Ca0.3TiO3] (BNTNN-xSCT) ceramics are synthesised via a conventional solid-state route and their structural, dielectric and defect-related evolutions are investigated. The incorporation of SCT into the BNTNN ceramic matrix leads to unit cell expansion and grain refinement while maintaining the cubic phase structure. These structural modifications disrupt long-range ferroelectric domain ordering, thereby enhancing dielectric relaxation and considerably increasing the breakdown field. Specifically, the BNTNN-0.08SCT ceramic (at 192 kV/cm) exhibits an energy storage density of 2.32 J/cm3 and an energy efficiency of 73.2 % along with relatively excellent thermal stability and cycling endurance. Analysis of leakage current and chemical composition reveals that the suppression of defect states, such as oxygen vacancies, resulting from SCT incorporation in the BNTNN ceramic, results in improved breakdown field and enhanced stability. This study provides crucial experimental insights intothe doping strategies for BNT ceramics, underscoring their immense potential as lead-free materials for advanced energy storage applications.
{"title":"Enhanced energy storage properties and suppressed leakage current in Sr2+/Ca2+ co-doped 0.7BNT-0.3NN ceramics","authors":"Yan Zhang , Jianing Wang , Zihao Lu , Yuanzhen Meng , Xinyuan Wang , Jiahao Yue , Linqing Zhang , Yabing Sun , Xianwei Wang","doi":"10.1016/j.ceramint.2025.12.003","DOIUrl":"10.1016/j.ceramint.2025.12.003","url":null,"abstract":"<div><div>Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub> (BNT)-based ceramics are promising dielectric energy storage materials owing to their fast charge-discharge capability and environmental friendliness. However, their relatively low energy density and limited breakdown strength hinder their practical application. Herein, (1-<em>x</em>)[0.7BNT-0.3NaNbO<sub>3</sub>]- <em>x</em>[Sr<sub>0.7</sub>Ca<sub>0.3</sub>TiO<sub>3</sub>] (BNTNN-<em>x</em>SCT) ceramics are synthesised via a conventional solid-state route and their structural, dielectric and defect-related evolutions are investigated. The incorporation of SCT into the BNTNN ceramic matrix leads to unit cell expansion and grain refinement while maintaining the cubic phase structure. These structural modifications disrupt long-range ferroelectric domain ordering, thereby enhancing dielectric relaxation and considerably increasing the breakdown field. Specifically, the BNTNN-0.08SCT ceramic (at 192 kV/cm) exhibits an energy storage density of 2.32 J/cm<sup>3</sup> and an energy efficiency of 73.2 % along with relatively excellent thermal stability and cycling endurance. Analysis of leakage current and chemical composition reveals that the suppression of defect states, such as oxygen vacancies, resulting from SCT incorporation in the BNTNN ceramic, results in improved breakdown field and enhanced stability. This study provides crucial experimental insights intothe doping strategies for BNT ceramics, underscoring their immense potential as lead-free materials for advanced energy storage applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 1859-1867"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.001
Andréia Batista , Thalita M. Valverde , Carla C.M. Silva , Kátia J. de Almeida , Aline M. Mesquita , Lídia M. Andrade , Guilherme M.J. Costa , Rafael M. Freire , Juliano C. Denardin , José M.F. Ferreira , Viviane M.R. Dos Santos , Ângela L. Andrade
Because of their capacity to stimulate the surface creation of apatite, bioactive glasses exhibit significant potential for biomedical applications, especially in bone regeneration. In this work, we developed and characterized two novel magnetic bioactive glass-ceramic nanocomposites, in which core magnetic nanoparticles (MNPs) were coated with bioactive glass (BG) shells. The MNPs were synthesized from the reaction between iron (III) chloride and sodium sulfite in an alkaline medium, while the BG was obtained by the sol-gel method. In vitro assays, involving the immersion of the composites in a simulated body fluid (SBF) solution, showed that both materials are bioactive but with different apatite layer growth kinetics on their surfaces. The studied composites were characterized by several techniques and a theoretical analysis was conducted using Density Functional Theory (DFT) calculations. Also, in vitro assays were performed to assess cell viability in pre-osteoblasts cells and to evaluate the mineralization potential of the magnetic nanoparticles. Importantly, this study highlights the interplay between bioactivity and magnetic saturation, providing insights into compositions that can simultaneously support bone tissue regeneration and exhibit magnetic properties relevant for hyperthermia-assisted therapies. DFT IR vibrational spectra indicate the presence of octahedral Fe(II) and Fe(III) sites, as well as tetrahedral Fe(III) sites, within the magnetic nanocomposites, confirming that only the magnetite (Fe3O4) phase is present in the synthesized magnetic samples. Furthermore, the computational results confirm the formation of hydroxyapatite in the composites samples under favorable thermodynamic conditions, with bonding energies involving the PO43− ion ranging from 75 to 99 kcal·mol−1. The in vitro investigations demonstrate that the composites exhibit favorable biocompatibility at a concentration of 25 μg·mL−1, whereas higher concentrations caused cytotoxicity. The BG effectively stimulated mineralization, implying potential applications in bone tissue engineering. These results enable the design of multifunctional biomaterials and suggest promising applications in bone tissue engineering.
{"title":"Bioactive glasses - Iron oxide nanocomposites: Synthesis, characterization and in vitro biological performance","authors":"Andréia Batista , Thalita M. Valverde , Carla C.M. Silva , Kátia J. de Almeida , Aline M. Mesquita , Lídia M. Andrade , Guilherme M.J. Costa , Rafael M. Freire , Juliano C. Denardin , José M.F. Ferreira , Viviane M.R. Dos Santos , Ângela L. Andrade","doi":"10.1016/j.ceramint.2025.12.001","DOIUrl":"10.1016/j.ceramint.2025.12.001","url":null,"abstract":"<div><div>Because of their capacity to stimulate the surface creation of apatite, bioactive glasses exhibit significant potential for biomedical applications, especially in bone regeneration. In this work, we developed and characterized two novel magnetic bioactive glass-ceramic nanocomposites, in which core magnetic nanoparticles (MNPs) were coated with bioactive glass (BG) shells. The MNPs were synthesized from the reaction between iron (III) chloride and sodium sulfite in an alkaline medium, while the BG was obtained by the sol-gel method. <em>In vitro</em> assays, involving the immersion of the composites in a simulated body fluid (SBF) solution, showed that both materials are bioactive but with different apatite layer growth kinetics on their surfaces. The studied composites were characterized by several techniques and a theoretical analysis was conducted using Density Functional Theory (DFT) calculations. Also, <em>in vitro</em> assays were performed to assess cell viability in pre-osteoblasts cells and to evaluate the mineralization potential of the magnetic nanoparticles. Importantly, this study highlights the interplay between bioactivity and magnetic saturation, providing insights into compositions that can simultaneously support bone tissue regeneration and exhibit magnetic properties relevant for hyperthermia-assisted therapies. DFT IR vibrational spectra indicate the presence of octahedral Fe(II) and Fe(III) sites, as well as tetrahedral Fe(III) sites, within the magnetic nanocomposites, confirming that only the magnetite (Fe<sub>3</sub>O<sub>4</sub>) phase is present in the synthesized magnetic samples. Furthermore, the computational results confirm the formation of hydroxyapatite in the composites samples under favorable thermodynamic conditions, with bonding energies involving the PO<sub>4</sub><sup>3−</sup> ion ranging from 75 to 99 kcal·mol<sup>−1</sup>. The <em>in vitro</em> investigations demonstrate that the composites exhibit favorable biocompatibility at a concentration of 25 μg·mL<sup>−1</sup>, whereas higher concentrations caused cytotoxicity. The BG effectively stimulated mineralization, implying potential applications in bone tissue engineering. These results enable the design of multifunctional biomaterials and suggest promising applications in bone tissue engineering.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 1831-1846"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A ceramic-phase molybdenum boride–carbon black (MoB@CB) hybrid nanostructure synthesized through the hydrothermal pathway was utilized as an advanced electrochemical sensing interface for determining the value of vanillin in various food matrices. The combination of MoB nanosheets with the conductive carbon black made the interface possess superior electrocatalytic activity for vanillin as well as having improved electro-active surface area, and enhanced kinetics in electron transfer for the interface. The structural, morphological, and elemental characterizations of the hybrid confirmed the optimal distribution and formation of MoB@CB. The modified glassy carbon electrode (MoB@CB/GCE) reached remarkable electrochemical performance toward the oxidation of vanillin, attaining a very broad linear range of 0.5–289.5 μM, and with an exceedingly low detection limit of 0.037 μM. The sensor showed remarkable operational stability over prolonged periods of time, outstanding reproducibility, and selectivity. Vanillin detection in real samples of food was successfully accomplished and the results (milk, chocolate, and ice cream) were validated with standard HPLC methods. The demonstrated MoB-based ceramic nanostructures with carbonaceous supports in the electrochemical sensor prove sophisticated advanced electrochemical sensing.
{"title":"Interfacial synergy in ceramic-based molybdenum boride anchored carbon black for efficient vanillin quantification in complex food matrices","authors":"Sathish Marimuthu , Gopika Meenakumari Gopakumar , Arunkumar Selvam , Beena Saraswathyamma , Balakrishnan Thangavelu , Chih-Yu Kuo , Majed A.B. , Zahra Bayhan , Mani Govindasamy","doi":"10.1016/j.ceramint.2025.12.011","DOIUrl":"10.1016/j.ceramint.2025.12.011","url":null,"abstract":"<div><div>A ceramic-phase molybdenum boride–carbon black (MoB@CB) hybrid nanostructure synthesized through the hydrothermal pathway was utilized as an advanced electrochemical sensing interface for determining the value of vanillin in various food matrices. The combination of MoB nanosheets with the conductive carbon black made the interface possess superior electrocatalytic activity for vanillin as well as having improved electro-active surface area, and enhanced kinetics in electron transfer for the interface. The structural, morphological, and elemental characterizations of the hybrid confirmed the optimal distribution and formation of MoB@CB. The modified glassy carbon electrode (MoB@CB/GCE) reached remarkable electrochemical performance toward the oxidation of vanillin, attaining a very broad linear range of 0.5–289.5 μM, and with an exceedingly low detection limit of 0.037 μM. The sensor showed remarkable operational stability over prolonged periods of time, outstanding reproducibility, and selectivity. Vanillin detection in real samples of food was successfully accomplished and the results (milk, chocolate, and ice cream) were validated with standard HPLC methods. The demonstrated MoB-based ceramic nanostructures with carbonaceous supports in the electrochemical sensor prove sophisticated advanced electrochemical sensing.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 1911-1925"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.012
Tianming Lu , Fulong Li , Wei He , Yuelin Wang , Wanpeng Shi , Jiaqi Jiang , Xiaohong Chen
To overcome the insufficient early osteoinductivity, delayed osseointegration and potential inflammatory response of Ti-6Al-4V (TC4) implants, four Strontium (Sr)-doped calcium phosphate coatings, HA, Sr-HA5, Sr-HA10 and Sr-HA20, which the substitution ratios of Sr2+ for Ca2+ were 0, 5, 10, and 20 mol% were grown in situ by a one-step hydrothermal route. The influence of Sr2+ substitution on surface wettability, bioactivity, antibacterial efficacy and early osteoconductivity was systematically evaluated. Within the investigated compositional window, the water contact angle decreased from 25.10 ± 1.00°–0° when the substitution ratios increased from 0 to 10 mol%, corresponding to a transition from hydrophilic to super-hydrophilic. Scanning electron microscopy (SEM) images showed that the surface successively presented rice-grain, rod-like, 3-D lamellar network and granular morphologies with increasing Sr2+ content. Combined energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) confirmed that the in-situ formed phase was predominantly Sr-doped hydroxyapatite. Antibacterial assays against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) revealed the highest bactericidal rate for the coating containing 10 mol% Sr2+. In vitro cell studies further identified this composition as the optimum for simultaneous cell proliferation and osteogenic differentiation. These results demonstrate that Sr-HA coatings can significantly accelerate early implant stability, thereby providing experimental and theoretical support for shortening patient recovery and improving clinical outcomes.
{"title":"Preparation and characterization of superhydrophilic Sr-doped hydroxyapatite coatings for medical implant surfaces","authors":"Tianming Lu , Fulong Li , Wei He , Yuelin Wang , Wanpeng Shi , Jiaqi Jiang , Xiaohong Chen","doi":"10.1016/j.ceramint.2025.12.012","DOIUrl":"10.1016/j.ceramint.2025.12.012","url":null,"abstract":"<div><div>To overcome the insufficient early osteoinductivity, delayed osseointegration and potential inflammatory response of Ti-6Al-4V (TC4) implants, four Strontium (Sr)-doped calcium phosphate coatings, HA, Sr-HA5, Sr-HA10 and Sr-HA20, which the substitution ratios of Sr<sup>2+</sup> for Ca<sup>2+</sup> were 0, 5, 10, and 20 mol% were grown in situ by a one-step hydrothermal route. The influence of Sr<sup>2+</sup> substitution on surface wettability, bioactivity, antibacterial efficacy and early osteoconductivity was systematically evaluated. Within the investigated compositional window, the water contact angle decreased from 25.10 ± 1.00°–0° when the substitution ratios increased from 0 to 10 mol%, corresponding to a transition from hydrophilic to super-hydrophilic. Scanning electron microscopy (SEM) images showed that the surface successively presented rice-grain, rod-like, 3-D lamellar network and granular morphologies with increasing Sr<sup>2+</sup> content. Combined energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) confirmed that the in-situ formed phase was predominantly Sr-doped hydroxyapatite. Antibacterial assays against <em>Escherichia coli</em> (<em>E. coli</em>) and <em>Staphylococcus aureus</em> (<em>S. aureus</em>) revealed the highest bactericidal rate for the coating containing 10 mol% Sr<sup>2+</sup>. In vitro cell studies further identified this composition as the optimum for simultaneous cell proliferation and osteogenic differentiation. These results demonstrate that Sr-HA coatings can significantly accelerate early implant stability, thereby providing experimental and theoretical support for shortening patient recovery and improving clinical outcomes.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 1926-1938"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.022
Yue You , Yanjun Li , Donghua Liu , Daofeng Sun , Longlong Jiang , Wenzhao Zhang , Jin Chen , Donghai Ding , Guoqing Xiao
In this work, a straightforward and high efficiency centrifugal spinning process was employed to fabricate alumina fibers with exceptional performance. The preparation parameters were optimized through an orthogonal test. Zirconia-doped alumina ceramic fibers with diameters around 1 μm were successfully produced using the optimized parameters. Analysis, including XRD, Raman, FTIR, and TEM, confirmed that the addition of ZrO2 in alumina inhibited the crystallization of alumina at high temperatures. Consequently, the resulting fibers exhibited enhanced compressive resilience. Furthermore, the zirconia-doped alumina fibers demonstrated outstanding high-temperature stability (>1000 °C) and thermal insulation performance. Low pressure drops and high-efficient filtration for removing submicron particulate matter (PM) in flue gas were attained by using the fiber mats for the filtration. The zirconia-doped alumina fibers prepared in this work through solution centrifugal spinning methods are attractive for use in high-temperature thermal management and industrial high temperature flue gas filtration.
{"title":"Parameter optimization and performance enhancement of zirconia-doped alumina fibers via solution centrifugal spinning","authors":"Yue You , Yanjun Li , Donghua Liu , Daofeng Sun , Longlong Jiang , Wenzhao Zhang , Jin Chen , Donghai Ding , Guoqing Xiao","doi":"10.1016/j.ceramint.2025.12.022","DOIUrl":"10.1016/j.ceramint.2025.12.022","url":null,"abstract":"<div><div>In this work, a straightforward and high efficiency centrifugal spinning process was employed to fabricate alumina fibers with exceptional performance. The preparation parameters were optimized through an orthogonal test. Zirconia-doped alumina ceramic fibers with diameters around 1 μm were successfully produced using the optimized parameters. Analysis, including XRD, Raman, FTIR, and TEM, confirmed that the addition of ZrO<sub>2</sub> in alumina inhibited the crystallization of alumina at high temperatures. Consequently, the resulting fibers exhibited enhanced compressive resilience. Furthermore, the zirconia-doped alumina fibers demonstrated outstanding high-temperature stability (>1000 °C) and thermal insulation performance. Low pressure drops and high-efficient filtration for removing submicron particulate matter (PM) in flue gas were attained by using the fiber mats for the filtration. The zirconia-doped alumina fibers prepared in this work through solution centrifugal spinning methods are attractive for use in high-temperature thermal management and industrial high temperature flue gas filtration.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 1994-2007"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.038
Xiang Cheng , Jiale Che , Haoran Zhang , Hui Li , Yu-hao Zhao , Rui Wang , Hui Kong
To study the transient evolution of oxides in steel, different titanium oxide powders (TiO, TiO2, Ti2O3, and Ti3O5) are directly added to HRB400 molten steel. Each experiment is conducted in a magnesia crucible within a vacuum induction furnace, and process samples are collected at 1, 5, 10, and 15 min after powder addition. The titanium content in all samples increases with treatment time. Similar increasing trends are observed in titanium-containing oxide properties, e.g., number density and normalized titanium content, suggesting that the titanium oxides first dissolve in molten steel, then decompose, and finally reform as titanium-containing oxides. The decomposition process involves cleavage of Ti–O chemical bonds. Although the titanium:steel mass ratio is constant in all experiments, Ti–O bonds are more readily broken in lower-valence state titanium oxides than in higher-valence oxides, resulting in higher titanium content and greater titanium-containing oxide number density. In addition, the different titanium:oxygen ratios in the various titanium oxides (TiO, TiO2, Ti2O3, and Ti3O5) lead to differences in resulting titanium-containing oxide properties, including composition, equivalent circle diameter, and length-to-width ratio. The resulting titanium-containing inclusions in all experimental groups effectively induce intragranular ferrite nucleation.
{"title":"Comparative study of oxide evolution in HRB400 steel through external adding different types of titanium oxides","authors":"Xiang Cheng , Jiale Che , Haoran Zhang , Hui Li , Yu-hao Zhao , Rui Wang , Hui Kong","doi":"10.1016/j.ceramint.2025.12.038","DOIUrl":"10.1016/j.ceramint.2025.12.038","url":null,"abstract":"<div><div>To study the transient evolution of oxides in steel, different titanium oxide powders (TiO, TiO<sub>2</sub>, Ti<sub>2</sub>O<sub>3</sub>, and Ti<sub>3</sub>O<sub>5</sub>) are directly added to HRB400 molten steel. Each experiment is conducted in a magnesia crucible within a vacuum induction furnace, and process samples are collected at 1, 5, 10, and 15 min after powder addition. The titanium content in all samples increases with treatment time. Similar increasing trends are observed in titanium-containing oxide properties, e.g., number density and normalized titanium content, suggesting that the titanium oxides first dissolve in molten steel, then decompose, and finally reform as titanium-containing oxides. The decomposition process involves cleavage of Ti–O chemical bonds. Although the titanium:steel mass ratio is constant in all experiments, Ti–O bonds are more readily broken in lower-valence state titanium oxides than in higher-valence oxides, resulting in higher titanium content and greater titanium-containing oxide number density. In addition, the different titanium:oxygen ratios in the various titanium oxides (TiO, TiO<sub>2</sub>, Ti<sub>2</sub>O<sub>3</sub>, and Ti<sub>3</sub>O<sub>5</sub>) lead to differences in resulting titanium-containing oxide properties, including composition, equivalent circle diameter, and length-to-width ratio. The resulting titanium-containing inclusions in all experimental groups effectively induce intragranular ferrite nucleation.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 2160-2172"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.047
Kumaresan Lakshmanan , Ranjith Kumar Dharman , Silambarasan Kuppusamy , Nandhakumar Eswaramoorthy , Mangalaraja Ramalinga Viswanathan , Mohd Khairul Bin Ahmad , Tae Hwan Oh
Owing to rapid population and industrial growth in recent decades, the primary challenges are water pollution and the increasing energy demand. These issues can be addressed through sustainable energy production, including conversion and storage, as well as the elimination of pollutants from wastewater. Two effective methods for achieving this are supercapacitors and photocatalysis. Rare earth metal oxides exhibit potential as anode materials for both supercapacitors and photocatalysis. In this study, nanocomposites of silver nanoparticle/yttrium oxide with titanium carbide MXene (Ag/Yb2O3@Ti3C2) were synthesized using hydrothermal and coprecipitation methods to create a stable and high-performance electrode material for supercapacitors and a catalytic material for photocatalysis. Ag/Yb2O3@Ti3C2 nanocomposites exhibited nanoscale particle size, high crystallinity, uniform particle distribution, well-defined phase and crystal structures, and distinct oxidation states of Ag, Yb, and Ti. Electrochemical performance testing was conducted using a three-electrode setup, revealing a high specific capacitance of 885.3 F/g for the Ag/Yb2O3@Ti3C2 nanocomposite at a current density of 1 A/g. The nanocomposite also demonstrated excellent long-term cycling stability, retaining 93 % of its original capacitance after 10,000 GCD cycles, with a coulombic efficiency of 99 %. Moreover, the Ag/Yb2O3@Ti3C2 nanocomposite exhibited remarkable photocatalytic activity, achieving 97 % degradation of MB dye within 75 min. Furthermore, experiments, including scavenger tests and band gap mechanism studies, were conducted to enhance the understanding of the photocatalytic properties of the catalyst. These findings indicate that Ag/Yb2O3@Ti3C2 holds promise as a material for environmental remediation and energy storage applications.
由于近几十年来人口和工业的快速增长，主要的挑战是水污染和不断增加的能源需求。这些问题可以通过可持续能源生产，包括转换和储存，以及消除废水中的污染物来解决。实现这一目标的两种有效方法是超级电容器和光催化。稀土金属氧化物在超级电容器和光催化中都表现出作为阳极材料的潜力。本研究采用水热法和共沉淀法合成了纳米银/氧化钇与碳化钛MXene （Ag/Yb2O3@Ti3C2）的纳米复合材料，为超级电容器创造了一种稳定、高性能的电极材料和光催化材料。Ag/Yb2O3@Ti3C2纳米复合材料具有纳米级粒径、高结晶度、颗粒分布均匀、相和晶体结构清晰、Ag、Yb和Ti氧化态明显等特点。采用三电极装置进行了电化学性能测试，结果表明，在电流密度为1 a /g时，Ag/Yb2O3@Ti3C2纳米复合材料的比电容高达885.3 F/g。该纳米复合材料还表现出优异的长期循环稳定性，在10,000次GCD循环后保持了93%的原始电容，库仑效率为99%。此外，Ag/Yb2O3@Ti3C2纳米复合材料表现出显著的光催化活性，在75 min内对MB染料的降解率达到97%。此外，还进行了清除剂测试和带隙机理研究等实验，以加深对催化剂光催化性能的了解。这些发现表明，Ag/Yb2O3@Ti3C2有望成为环境修复和储能应用的材料。
{"title":"Ag/Yb2O3@Ti3C2 nanocomposites as high-performance catalysts for energy storage and photocatalytic dye degradation","authors":"Kumaresan Lakshmanan , Ranjith Kumar Dharman , Silambarasan Kuppusamy , Nandhakumar Eswaramoorthy , Mangalaraja Ramalinga Viswanathan , Mohd Khairul Bin Ahmad , Tae Hwan Oh","doi":"10.1016/j.ceramint.2025.12.047","DOIUrl":"10.1016/j.ceramint.2025.12.047","url":null,"abstract":"<div><div>Owing to rapid population and industrial growth in recent decades, the primary challenges are water pollution and the increasing energy demand. These issues can be addressed through sustainable energy production, including conversion and storage, as well as the elimination of pollutants from wastewater. Two effective methods for achieving this are supercapacitors and photocatalysis. Rare earth metal oxides exhibit potential as anode materials for both supercapacitors and photocatalysis. In this study, nanocomposites of silver nanoparticle/yttrium oxide with titanium carbide MXene (Ag/Yb<sub>2</sub>O<sub>3</sub>@Ti<sub>3</sub>C<sub>2</sub>) were synthesized using hydrothermal and coprecipitation methods to create a stable and high-performance electrode material for supercapacitors and a catalytic material for photocatalysis. Ag/Yb<sub>2</sub>O<sub>3</sub>@Ti<sub>3</sub>C<sub>2</sub> nanocomposites exhibited nanoscale particle size, high crystallinity, uniform particle distribution, well-defined phase and crystal structures, and distinct oxidation states of Ag, Yb, and Ti. Electrochemical performance testing was conducted using a three-electrode setup, revealing a high specific capacitance of 885.3 F/g for the Ag/Yb<sub>2</sub>O<sub>3</sub>@Ti<sub>3</sub>C<sub>2</sub> nanocomposite at a current density of 1 A/g. The nanocomposite also demonstrated excellent long-term cycling stability, retaining 93 % of its original capacitance after 10,000 GCD cycles, with a coulombic efficiency of 99 %. Moreover, the Ag/Yb<sub>2</sub>O<sub>3</sub>@Ti<sub>3</sub>C<sub>2</sub> nanocomposite exhibited remarkable photocatalytic activity, achieving 97 % degradation of MB dye within 75 min. Furthermore, experiments, including scavenger tests and band gap mechanism studies, were conducted to enhance the understanding of the photocatalytic properties of the catalyst. These findings indicate that Ag/Yb<sub>2</sub>O<sub>3</sub>@Ti<sub>3</sub>C<sub>2</sub> holds promise as a material for environmental remediation and energy storage applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 2264-2278"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.063
Hasna Abdullah Alali , Mohamad M. Ahmad , H. Mahfoz Kotb , Kawther Al-Amer , Khan Alam
Al2O3–MnO2 (Al/MnO) nanocomposites were effectively synthesized in this work using a ball milling approach with different Al2O3 contents (0–50 wt%). X-ray diffraction (XRD) examination verified that Al2O3 inhibited the growth of MnO2 grains, demonstrating the formation of nanocrystalline phases with average crystallite sizes ranging from 27.4 to 49.7 nm as the Al2O3 content rose. Scanning electron microscopy (SEM) revealed that the Al2O3 particles were evenly dispersed throughout the MnO2. The UV–visible absorption spectra of the Al/MnO nanocomposites showed a notable absorption edge below 400 nm in all samples. The range of the optical band gap (Eg) was 3.27 to 3.56 eV. The sample with the highest Al2O3 content, Al/MnO_5, exhibits the most efficient photocatalytic activity towards methylene blue (MB) dye, reaching a maximum degradation of 93 % at 90 min. Due to the high resistivity of Al2O3, impedance spectroscopy showed that the complex impedance of the studied samples rose with the addition of Al2O3, suggesting an increase in bulk resistance. As the Al2O3 content increases, Nyquist plots revealed clear semicircles with growing widths, suggesting a decline in charge mobility where the activation energy for conduction increases from 0.193 eV to 0.234 eV with Al2O3 content. According to these results, MnO2 nanocomposites' photocatalytic electrical and dielectric performance may be greatly influenced by adjusting the Al2O3 content, which makes them attractive options for different applications.
{"title":"Effects of Al2O3 contents on the photocatalytic and electrical properties of Al2O3–MnO2 nanocomposites prepared by ball milling","authors":"Hasna Abdullah Alali , Mohamad M. Ahmad , H. Mahfoz Kotb , Kawther Al-Amer , Khan Alam","doi":"10.1016/j.ceramint.2025.12.063","DOIUrl":"10.1016/j.ceramint.2025.12.063","url":null,"abstract":"<div><div>Al<sub>2</sub>O<sub>3</sub>–MnO<sub>2</sub> (Al/MnO) nanocomposites were effectively synthesized in this work using a ball milling approach with different Al<sub>2</sub>O<sub>3</sub> contents (0–50 wt%). X-ray diffraction (<em>XRD</em>) examination verified that Al<sub>2</sub>O<sub>3</sub> inhibited the growth of MnO<sub>2</sub> grains, demonstrating the formation of nanocrystalline phases with average crystallite sizes ranging from 27.4 to 49.7 nm as the Al<sub>2</sub>O<sub>3</sub> content rose. Scanning electron microscopy (SEM) revealed that the Al<sub>2</sub>O<sub>3</sub> particles were evenly dispersed throughout the MnO<sub>2</sub>. The UV–visible absorption spectra of the Al/MnO nanocomposites showed a notable absorption edge below 400 nm in all samples. The range of the optical band gap (E<sub>g</sub>) was 3.27 to 3.56 eV. The sample with the highest Al<sub>2</sub>O<sub>3</sub> content, Al/MnO_5, exhibits the most efficient photocatalytic activity towards methylene blue (MB) dye, reaching a maximum degradation of 93 % at 90 min. Due to the high resistivity of Al<sub>2</sub>O<sub>3</sub>, impedance spectroscopy showed that the complex impedance of the studied samples rose with the addition of Al<sub>2</sub>O<sub>3</sub>, suggesting an increase in bulk resistance. As the Al<sub>2</sub>O<sub>3</sub> content increases, Nyquist plots revealed clear semicircles with growing widths, suggesting a decline in charge mobility where the activation energy for conduction increases from 0.193 eV to 0.234 eV with Al<sub>2</sub>O<sub>3</sub> content. According to these results, MnO<sub>2</sub> nanocomposites' photocatalytic electrical and dielectric performance may be greatly influenced by adjusting the Al<sub>2</sub>O<sub>3</sub> content, which makes them attractive options for different applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 2459-2468"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.067
Zhe Zhu , Zhonghua Yao , Xinhui Li , Rui Zhao , Ruiling Chang , Hua Hao , Minghe Cao , Hanxing Liu
The quenching process is investigated to modulate domain structures behaviors in three ceramic compositions: lead zirconate titanate with a 75/25 zirconium titanium ratio (75/25PZT), Mn-doped (Mn-75/25PZT) and Nb-doped (Nb-75/25PZT). Piezoresponse force microscopy (PFM) demonstrates a transformation of domain structures from micron to nanoscale, accompanied by increased domain walls (DWs) density. In-situ Raman spectroscopy detects a softening of the E (TO1) vibration mode after quenching, indicating lower DWs energy density and higher internal stress. Furthermore, both 75/25PZT and Mn-75/25PZT demonstrate the release of pinched hysteresis loops, coupled with substantial enhancements in piezoelectric coefficients of 36 % and 37 %, respectively. Additionally, both reversible and irreversible dielectric responses are augmented through quenching. This investigation provides detailed insights into the evolution of domains during the quenching process in these ceramic systems.
{"title":"Probing ferroelectric domain-polarization coupling mechanisms in polycrystalline PZT ceramics","authors":"Zhe Zhu , Zhonghua Yao , Xinhui Li , Rui Zhao , Ruiling Chang , Hua Hao , Minghe Cao , Hanxing Liu","doi":"10.1016/j.ceramint.2025.12.067","DOIUrl":"10.1016/j.ceramint.2025.12.067","url":null,"abstract":"<div><div>The quenching process is investigated to modulate domain structures behaviors in three ceramic compositions: lead zirconate titanate with a 75/25 zirconium titanium ratio (75/25PZT), Mn-doped (Mn-75/25PZT) and Nb-doped (Nb-75/25PZT). Piezoresponse force microscopy (PFM) demonstrates a transformation of domain structures from micron to nanoscale, accompanied by increased domain walls (DWs) density. In-situ Raman spectroscopy detects a softening of the E (TO1) vibration mode after quenching, indicating lower DWs energy density and higher internal stress. Furthermore, both 75/25PZT and Mn-75/25PZT demonstrate the release of pinched hysteresis loops, coupled with substantial enhancements in piezoelectric coefficients of 36 % and 37 %, respectively. Additionally, both reversible and irreversible dielectric responses are augmented through quenching. This investigation provides detailed insights into the evolution of domains during the quenching process in these ceramic systems.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 2508-2517"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.ceramint.2025.12.070
Yuhang He, Xinyu Li, Zunping Xu, Yi Chen
The ABO3–typed compound LiSbO3 was incorporated into 0.73BiFeO3-0.27BaTiO3 to form (0.73-x)BiFeO3-xLiSbO3-0.27BaTiO3 ternary ceramics, fabricated through a conventional solid-state sintering route. With the addition of LiSbO3, the crystal structure of the ceramics was found to evolve from predominated by rhombohedral phase to predominated by tetragonal phase. There is a typical morphotropic phase boundary at x = 0.002, whose ratio of rhombohedral phase to tetragonal phase is extremely close to 1:1. Near the phase boundary, both the piezoelectric constant d33 and planar electromechanical coupling coefficient kp reached their respective maximum values, being 160 pC/N and 0.30. The dielectric-temperature measurements showed that the relaxor phase transition would be induced as LiSbO3 was added above a certain level. Furthermore, the Curie temperature constantly reduces with the increase of LiSbO3. Nevertheless, a relatively high Curie temperature (∼526 °C) can be remained for the ceramics with x = 0.002. Additionally, an investigation was also performed of the influence of LiSbO3 on the temperature stability of piezoelectric properties, in order to provide a reference for high temperature applications.
{"title":"Phase structure and electrical properties of LiSbO3-modified BiFeO3-BaTiO3-based ceramics","authors":"Yuhang He, Xinyu Li, Zunping Xu, Yi Chen","doi":"10.1016/j.ceramint.2025.12.070","DOIUrl":"10.1016/j.ceramint.2025.12.070","url":null,"abstract":"<div><div>The ABO<sub>3</sub>–typed compound LiSbO<sub>3</sub> was incorporated into 0.73BiFeO<sub>3</sub>-0.27BaTiO<sub>3</sub> to form (0.73-<em>x</em>)BiFeO<sub>3</sub>-<em>x</em>LiSbO<sub>3</sub>-0.27BaTiO<sub>3</sub> ternary ceramics, fabricated through a conventional solid-state sintering route. With the addition of LiSbO<sub>3</sub>, the crystal structure of the ceramics was found to evolve from predominated by rhombohedral phase to predominated by tetragonal phase. There is a typical morphotropic phase boundary at <em>x</em> = 0.002, whose ratio of rhombohedral phase to tetragonal phase is extremely close to 1:1. Near the phase boundary, both the piezoelectric constant <em>d</em><sub>33</sub> and planar electromechanical coupling coefficient <em>k</em><sub>p</sub> reached their respective maximum values, being 160 pC/N and 0.30. The dielectric-temperature measurements showed that the relaxor phase transition would be induced as LiSbO<sub>3</sub> was added above a certain level. Furthermore, the Curie temperature constantly reduces with the increase of LiSbO<sub>3</sub>. Nevertheless, a relatively high Curie temperature (∼526 °C) can be remained for the ceramics with <em>x</em> = 0.002. Additionally, an investigation was also performed of the influence of LiSbO<sub>3</sub> on the temperature stability of piezoelectric properties, in order to provide a reference for high temperature applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 2","pages":"Pages 2537-2551"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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