Ceramics International最新文献

{"title":"A multi-mode self-calibrating visual optical thermometer based on Eu3+-doped Y2WO6","authors":"Qingfeng Zhao,&nbsp;Ying Yu,&nbsp;Yahuan Zhang,&nbsp;Zhoumei Yang,&nbsp;Yuanzuo Li","doi":"10.1016/j.ceramint.2026.07.287","DOIUrl":"10.1016/j.ceramint.2026.07.287","url":null,"abstract":"<div><div>With the continuous advancement of sensor technology, multi-mode high-precision optical thermometers have become a key research focus in the field of temperature sensing. Nevertheless, studies on visualizable multi-mode optical thermometry (MMOT) are still considerably lacking. Herein, a series of novel Y₂WO₆:Eu³⁺ phosphors were prepared. The down-conversion luminescence spectra of the materials were systematically investigated. Upon excitation by a 315 nm laser, the [WO₆]^6- group exhibits an emission at 455 nm, while Eu³⁺ ions show characteristic emissions at 590, 610, 627, 654 and 705 nm. Due to the distinct temperature responses of these emission spectra of the two luminescent centers, four-mode optical thermometry was successfully achieved based on the fluorescence intensity ratio (<em>FIR</em>) between 455 nm and 610 nm, Commission Internationale de L'Eclairage (<em>CIE</em>) coordinates, the single-peak fluorescence intensity ratio (<em>SFIR</em>) at 455 nm, and the excitation intensity ratio (<em>EIR</em>) at 610 nm. The maximum relative sensitivity (<em>S</em>_<em>r</em>) values can reach 4.08% K⁻¹ at 303 K, 0.77% K⁻¹ at 337 K, 1.95% K⁻¹ at 363 K, and 4.29% K⁻¹ at 303 K, respectively. Additionally, visual fluorescence thermometry with distinct color transitions from purple to deep red is realized in this work over the temperature range of 303 K to 483 K. These temperature-sensing properties demonstrate that Y₂WO₆:Eu³⁺ phosphors exhibit promising application potential in visual multi-mode self-calibrating optical thermometry.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 43863-43872"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071902","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}

{"title":"Multi-scale composite mechanism of sandwich-structure TPS composites","authors":"Bin-zhi Jiang,&nbsp;Yang Xiang,&nbsp;Su-ling Wang,&nbsp;Sen Yao,&nbsp;Jie Yang,&nbsp;Jin Wen,&nbsp;Jian-ping Cao,&nbsp;Xu-hui Wu","doi":"10.1016/j.ceramint.2026.07.342","DOIUrl":"10.1016/j.ceramint.2026.07.342","url":null,"abstract":"<div><div>This study comprehensively investigates the composite mechanism of an integrated thermal protection system (TPS) with a hydrophobically modified silica aerogel core and fiber-reinforced SiO_2f/SiO₂ face-sheets, fabricated via multi-cycle sol-gel impregnation and high-temperature sintering. Raw material specifications, sol parameters and detailed sintering schedules were fully quantified, and supplementary characterizations including thermal conductivity, TG-DSC thermal stability, pore size distribution, hydrophobic contact angle and interfacial shear strength were supplemented to support mechanism analysis. We systematically studied the effects of 1–11 impregnation cycles on the macrostructure, density, mechanical properties and microstructural evolution of the core and face-sheets. Results show the aerogel core has exceptional stability, with density at 0.38–0.41 g/cm³ and compressive stress (3% strain) at 0.13–0.19 MPa, due to hydrophobicity that resists sol infiltration; the water contact angle of modified aerogel reaches 132.5° ± 2.1°, directly verifying the anti-infiltration effect. In contrast, the face-sheet densifies progressively, with density increasing from 1.20 to 1.54 g/cm³ and stitched samples reaching a tensile strength of 120 MPa after 11 cycles; mercury intrusion testing quantifies the gradual decline of face-sheet porosity throughout cyclic impregnation. Microstructural characterization reveals the sol-gel process enables SiO₂ matrix to encapsulate fiber bundles, forming a dense ceramic composite after sintering. SiO_2f stitching enhances the face-sheet's tensile strength by ∼20% via a \"pinning\" effect without altering the microscale sol-gel mechanism, and measured interfacial shear strength confirms stable interfacial bonding between core and face-sheet. Sintering-induced microcracks effectively raise composite fracture toughness from 1.31 MPa m¹ᐟ² to 1.92 MPa m¹ᐟ² by energy dissipation. Combining mechanical performance and thermal insulation property (core thermal conductivity stabilized at 0.032∼0.035 W/(m·K), 11 impregnation cycles are verified as the optimal preparation parameter. This study reveals the decoupled evolution mechanism of the core and face-sheet in sandwich TPS composites under repeated sol-gel cycles, determines the optimal fabrication process combined with multi-scale structural evolution rules, and provides important experimental and theoretical references for the process design and targeted performance regulation of high-performance thermal protection composites.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 44642-44652"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174115","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}

{"title":"Sol-gel synthesized rare-earth high-entropy oxide for efficient pH dependent photocatalytic dye degradation","authors":"Avnee Chauhan,&nbsp;Mohammed Boujida,&nbsp;Elena Colusso,&nbsp;Hamada Elsayed,&nbsp;Dušan Galusek,&nbsp;Enrico Bernardo","doi":"10.1016/j.ceramint.2026.07.440","DOIUrl":"10.1016/j.ceramint.2026.07.440","url":null,"abstract":"<div><div>High-entropy oxides (HEOs) are increasingly recognized as multifunctional materials that contain various cations in nearly equal proportions, forming stable, single-phase crystalline materials. Their high configurational entropy, complex defect chemistry, and structural flexibility make them a promising option for photocatalytic applications. This study reports the first synthesis of a rare-earth high-entropy oxide with the formula (Er_0.2Yb_0.2Sm_0.2Gd_0.2Dy_0.2)₂O₃, using a simple sol-gel citrate method. The resulting powder was characterized by a single-phase bixbyite structure and nanosized particles, Raman spectroscopy confirmed the rare-earth oxide framework through characteristic M - O vibrational modes. Optical analysis showed an optical band gap of 4.5 eV. The photocatalytic degradation of methylene blue (MB) under UV light was tested over a broad pH range of 3-12 and the catalyst demonstrated effectiveness, with a degradation rate of 94% within 90 min of exposure. The degradation was fastest under mild acidic conditions, likely due to increased dye adsorption and radical formation. Nanoscale morphology coupled with numerous surface-active sites, and entropy-stabilized defect environment contributed to effective charge separation and enhanced photocatalytic performance. Catalyst stability and recyclability tests at pH 7 confirmed retained photocatalytic activity over three cycles, and retention of the main crystalline phase in the system. This shows the potential of rare-earth bixbyite-type HEOs as stable photocatalysts for wastewater treatment.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45638-45648"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174121","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}

{"title":"Influence of repetition rate on the microstructure and mechanical properties of dissimilar sapphire/Invar36 alloy joints by ultrafast laser micro-welding","authors":"Rui Zhou,&nbsp;Qing Jiang,&nbsp;Jin Yang,&nbsp;Tao Zhang,&nbsp;Yixuan Zhao,&nbsp;Rui Pan,&nbsp;Peng Li,&nbsp;Caiwang Tan,&nbsp;Xiaoguo Song","doi":"10.1016/j.ceramint.2026.07.427","DOIUrl":"10.1016/j.ceramint.2026.07.427","url":null,"abstract":"<div><div>This study systematically investigated the effects of thermal accumulation and thermal diffusion on the microstructure and mechanical properties of sapphire/Invar36 alloy joints fabricated by ultrafast laser micro-welding at different repetition rates. The results indicated that as the repetition rate decreased, the shear strength of the joints progressively improved, accompanied by a significant increase in interfacial mixing and the mixture layer attained its maximum thickness. A high-strength joint with a shear strength of 269.94 MPa was successfully produced at a repetition rate of 200 kHz, providing crucial technical support for the practical application of this material system in industrial fields. Fractographic analysis on the Invar36 alloy side revealed a typical dimpled morphology, characteristic of ductile fracture, which confirmed that sufficient interfacial mixing had significantly enhanced the mechanical properties. Furthermore, this study revealed, for the first time through numerical simulation, the evolution behavior of the temperature field at the joint interface under different repetition rates, elucidated the energy relaxation process from electrons to the lattice and the thermal accumulation and thermal diffusion behavior of the joint, and proposed the joint formation mechanism.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45497-45509"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174251","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}

{"title":"Thermally-induced structural evolution and optical stability of Al2O3 anti-reflection thin film on 4H-SiC","authors":"Zhenqi Li,&nbsp;Shengnan Jiang,&nbsp;Lin Lyu,&nbsp;Tao Liu,&nbsp;Huan He,&nbsp;Meibo Tang,&nbsp;Xiuhong Pan,&nbsp;YunZhen Cao,&nbsp;Xuechao Liu","doi":"10.1016/j.ceramint.2026.07.430","DOIUrl":"10.1016/j.ceramint.2026.07.430","url":null,"abstract":"<div><div>Monocrystalline 4H-SiC is a promising optical window material for extreme environments; however, its application is limited by high Fresnel reflection and a lack of understanding regarding its high-temperature optical-structural degradation in oxidizing atmospheres. In this study, we systematically investigate the evolution of optical properties, morphology, and structural integrity of single-layer Al₂O₃ anti-reflection (AR) thin films deposited on 4H-SiC via electron beam evaporation under air annealing up to 1200 °C. The double-sided Al₂O₃ films successfully suppress surface reflections, enhancing the average visible transmittance from 65% to over 90%. The Al₂O₃/4H-SiC system exhibits stable structural integrity and broadband optical tolerance up to 1000 °C. Even after 20 h of annealing, no detectable crystalline Al₂O₃ phase is observed, with the system retaining a 98.2% peak and an 84.4% broadband average transmittance across 380–2000 nm. However, a critical operational threshold was identified at 1200 °C, where the average visible transmittance severely drops by approximately 40%. Mechanistic analysis reveals that this failure is primarily driven by solid-state dewetting and thermally activated surface diffusion, which cause mass redistribution and the formation of surface depressions (100–200 nm deep). Concurrently, thermal expansion mismatch and interfacial reactions induce micro-cracking and void formation. Ultimately, these structural defects compromise the morphological integrity of the film, leading to the loss of its AR function. This work presents a feasible broadband AR approach for 4H-SiC and clarifies its high-temperature failure mechanisms, providing a reference for extreme-environment optical applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45535-45544"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174255","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}

{"title":"Ultra-low shrinkage near-net-shaping of SiC ceramics: Decoupling dimensional stability and properties via DMSO-mediated freeze-casting","authors":"Ji-Su Yoon,&nbsp;Hyun-Hee Choi,&nbsp;Sea-Hoon Lee,&nbsp;Heesoo Lee","doi":"10.1016/j.ceramint.2026.07.424","DOIUrl":"10.1016/j.ceramint.2026.07.424","url":null,"abstract":"<div><div>The realization of near-net-shaping in high-performance silicon carbide (SiC) ceramics is often hindered by the inherent trade-off between dimensional accuracy and structural reliability. This study aims to decouple these properties by engineering the “defect architecture” of SiC via cryoprotectant-mediated freeze-casting. High-solids-loading SiC slurries (62 vol%) were prepared with varying dimethyl sulfoxide (DMSO) contents (7-20 wt%) and the resulting casts were densified through Polymer Infiltration and Pyrolysis (PIP). We achieved an extremely low linear shrinkage of less than 1% throughout the entire process, demonstrating exceptional dimensional fidelity. Microstructural analysis revealed that DMSO addition reconfigured the ice-templated morphology by reducing the population of coarse, low-sphericity voids and promoting a more refined void distribution. This micro-architectural transformation reduced the severity of critical flaws, resulting in a three-fold increase in flexural strength (from 35.0 to 115.9 MPa) despite only minor differences in final relative density. Furthermore, the refined architecture enhanced skeletal continuity, significantly improving thermal conductivity. While conventional ceramic processing—including additive manufacturing—often suffers from drying and sintering-induced deformations that impede commercial viability, the current approach offers a viable route to bypass these challenges. Our findings demonstrate the potential of DMSO-mediated freeze-casting/PIP processing for near-net shaping of SiC ceramics, as evidenced by the ultra-low shrinkage of plate-like specimens.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45458-45469"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174256","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}

{"title":"Photoluminescence, photochromism and reversible optical modulation of La3+/Er3+/Yb3+ tri-doped K1-xNaxNbO3 ceramics","authors":"Kaiyue Shan,&nbsp;Zhong Cao,&nbsp;Qifa Lin,&nbsp;Junhao Cai,&nbsp;Da Zhou,&nbsp;Hao Yan,&nbsp;Min Gao,&nbsp;Chunlin Zhao,&nbsp;Cong Lin,&nbsp;Xiao Wu","doi":"10.1016/j.ceramint.2026.07.524","DOIUrl":"10.1016/j.ceramint.2026.07.524","url":null,"abstract":"<div><div>Photochromic (PC) ceramics exhibiting multifunctional optical features hold significant promise for applications in real-time information storage, anti-counterfeiting technologies, and photoelectric energy conversion. However, conventional performance optimization strategies are predominantly confined to tuning the concentration of activators (e.g., rare-earth dopants) and frequently fail to overcome the intrinsic trade-off between optical transparency and PC efficiency. This study presents the development of a series of K_1-<em>x</em>Na_<em>x</em>NbO₃-based transparent ceramics tri-doped with fixed concentrations of La³⁺, Yb³⁺, and Er³⁺. By precisely tuning the K⁺/Na⁺ ratio via stoichiometric control, we systematically regulate defect charge compensation and the energy level depth of traps, thereby effectively decoupling the intrinsic performance trade-off. With increasing Na⁺ content, lattice contraction leads to elevated formation energies for critical defects and a reduction in trap energy levels, thereby inhibiting the effective capture of charge carriers and weakening the PC response. Large and reversible photoinduced luminescence modulation (∼80%) and optical transmittance modulation (∼91%) were achieved at <em>x</em> = 0 by alternating irradiation with a 405 nm laser and thermal stimulation at 300 °C. This study provides an in-depth investigation of the optical modulation mechanism and the formation model of multiple color centers, thereby expanding the applicability of PC materials in real-time and multi-dimensional optical recording.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 46589-46600"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174264","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}

{"title":"NaNbO3-modulated phase and defect evolution in A-site high-entropy perovskite ceramics for high-efficiency energy storage","authors":"Jiajun Wang,&nbsp;Zishun Zhou,&nbsp;Qiang Li,&nbsp;Yixian Li,&nbsp;Zhilin Ji,&nbsp;Fuzhi Cao,&nbsp;Hui Chen,&nbsp;Mingjie Wang,&nbsp;Weijia Wang,&nbsp;Huiqing Fan","doi":"10.1016/j.ceramint.2026.07.514","DOIUrl":"10.1016/j.ceramint.2026.07.514","url":null,"abstract":"<div><div>A-site multicomponent high-entropy perovskite ceramics provide a chemically disordered host for lead-free dielectric energy storage, but the coupling among aliovalent modification, phase stability, defect evolution, and electrical performance remains insufficiently understood. Herein, (1-<em>x</em>)(Sr_0.2Bi_0.2Na_0.2La_0.2Li_0.2)TiO₃-<em>x</em>NaNbO₃ (<em>x</em> = 0, 0.04, 0.08, 0.12, and 0.16; abbreviated as SBNLL-<em>x</em>NN) ceramics were investigated. Because all compositions satisfy the high-entropy criterion, configurational entropy is treated as a compositional descriptor rather than an independently controlled origin of performance enhancement. Moderate NaNbO₃ incorporation promotes Nb⁵⁺-related donor compensation, suppresses oxygen-vacancy-related defect states, enhances the electrical resistance, and increases the breakdown strength. The optimum response at <em>x</em> = 0.08 is mainly associated with improved insulation and enhanced relaxor-like polarization behavior within the perovskite-dominated compositional region. At higher NN contents, weak secondary-phase reflections emerge concurrently with defect redistribution and enhanced defect-assisted conduction. The optimum SBNLL-0.08NN achieves <em>W</em>_rec = 3.16 J/cm³, <em>η</em> = 98.11%, and <em>E</em>_b = 350 kV cm⁻¹, demonstrating an effective composition–phase–defect regulation strategy for high-efficiency dielectric energy-storage ceramics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 46488-46500"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174267","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}

{"title":"Synergistic oxygen vacancies and interfacial charge transfer in iodine-doped CeO2/rGO nanocomposites for visible-light degradation of levofloxacin","authors":"Muhammad Tauseef Qureshi,&nbsp;Abdul Rauf,&nbsp;Aeshah Alrubayyi,&nbsp;Jawza Sh Alnawmasi,&nbsp;Tasneem I. Hussein,&nbsp;Ali Ercetin,&nbsp;Nissren Tamam,&nbsp;Imran Shakir,&nbsp;Muhammad Aadil","doi":"10.1016/j.ceramint.2026.07.516","DOIUrl":"10.1016/j.ceramint.2026.07.516","url":null,"abstract":"<div><div>Halogen doping in transition metal oxides plays a critical role in tuning photoelectronic characteristics by inducing oxygen vacancies and defect states, altering the band gap and charge carrier mobility of the host. Herein, a series of Iodine-doped Ceria (CeO₂) nanoparticles with (I_x-CO, x = 0.01, 0.02, 0.04) are prepared by the hydrothermal method using NaI as the iodine source. The optimized I-doped CO nanoparticles are further amalgamated with two-dimensional (2D) reduced graphene oxide (rGO) nanosheets denoted as rGO@I_x-CO. Iodine doping improves opto-electrical properties, including a reduction in the band gap, a positive shift in the flat band potential, improved interfacial charge transfer, and electrical conductivity. Among all compositions, I_0.02-CO doping delivers the most optimized opto-electrical performance. The integration of I_0.02-CO with thin film graphene sheets further improved its electrical properties. The band gap value is reduced to 2.81 eV for I_0.02-CO compared to 3.02 eV for pristine CO. The R_CT values decrease from 747 Ω for CO to 127 Ω for I_0.02-CO and further to 92.6 Ω for rGO@I_0.02-CO. Whereas, an increase in photocurrent intensity from 148.7 μA for pristine CO to 311.9 μA and 788 μA is observed for I_0.02-CO, and rGO@I_0.02-CO, respectively. Mott-Schottky analysis indicated a positive shift in E_fb from -1.30 for CO to -0.75 and -0.72 V for I_0.02-CO, and rGO@I_0.02-CO, respectively. When evaluated for Levofloxacin degradation, I_0.02-CO and <span><span>rGO@_I0.02-CO</span><svg><path></path></svg></span> demonstrated 1.8- and 2.5-fold enhancement in photocatalytic activity (64.5% and 90.6%, respectively) compared to pristine CO (35.9%). The highest photocatalytic activity of rGO@I_0.02-CO is ascribed to enhanced intrinsic properties and synergism arising from the I-doping and highly conductive rGO nanosheets.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 46501-46514"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174268","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}

{"title":"Facile synthesis of plate-like TiO2-SiO2-FeOx nanocomposites for efficient singlet oxygen dominated Fenton-like reactions under dark conditions","authors":"Qingnan Meng,&nbsp;Linzhi Huang,&nbsp;Yuan Wang,&nbsp;Zhangwen Xie,&nbsp;Qingmin Kou,&nbsp;Zhen Xi,&nbsp;Fangjuan Lu,&nbsp;Yufei Tang,&nbsp;Kang Zhao","doi":"10.1016/j.ceramint.2026.07.323","DOIUrl":"10.1016/j.ceramint.2026.07.323","url":null,"abstract":"<div><div>Heterogeneous Fenton-like catalysis using iron-based materials offers advantages over homogeneous systems in the removal of persistent organic pollutants from water, but it faces challenges such as nanoparticle aggregation. Herein, a mild, alkali-metal-free route is established to synthesize plate-like titanium dioxide-silicon dioxide (TiO₂-SiO₂) nanocomposites with <em>in-situ</em> loaded iron oxides (FeO_x) via an ammonia-mediated hydrothermal process. The formation of the plate-like morphology is attributed to the combined effects of SiO₂ incorporation and acetylacetone chelation. The optimized composite (TSF-1) exhibits significantly enhanced catalytic activity in the dark Fenton-like degradation of organic pollutants. Specifically, TSF-1 achieved an outstanding RhB degradation efficiency of 100% at an initial pH of 3.0 within 60 min, whereas the pristine TS support showed a minimal degradation efficiency of only 19.3%. This superior performance is attributed to its large specific surface area and the abundant surface-active sites (such as Ti³⁺ and Fe²⁺). Notably, our results strongly support a non-radical pathway primarily driven by singlet oxygen (¹O₂) rather than conventional hydroxyl radicals (•OH). We propose that this non-radical pathway is driven by synergistic interactions, where FeOx domains likely act as the primary hydrogen peroxide (H₂O₂) activation sites, while the TiO₂-SiO₂ support facilitates ≡ Fe(II) regeneration and effectively converts generated •OH radicals into ¹O₂.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 44431-44439"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174362","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}