Journal of Science: Advanced Materials and Devices最新文献

{"title":"BaO-modified lead-free borate glasses: Structural, optical, and radiation shielding enhancements","authors":"Yasser Maghrbi ,&nbsp;Heryanto Heryanto ,&nbsp;Shrikant Biradar ,&nbsp;Mohamed Y. Hanfi ,&nbsp;M.I. Sayyed","doi":"10.1016/j.jsamd.2025.100949","DOIUrl":"10.1016/j.jsamd.2025.100949","url":null,"abstract":"<div><div>In this study, a series of borate-based glasses with the composition (55-x)B₂O₃–7MgO–14ZnO-xBaO-1Sm₂O₃ (x = 23, 27, 31, and 35 mol%) were synthesized using the conventional fast-cooling process to examine the impact of BaO incorporation on their various properties. As BaO content increased, both glass density (3.950–4.291 g/cm³) and molar volume (23.104–23.608 cm³/mol) rose. FTIR analysis confirmed the evolution of the borate network, with intensified bands related to BO₄ and BO₃ units and the emergence of Ba–O vibrations, indicating disrupted connectivity. Mechanically, increasing BaO weakened the glass network, reducing parameters such as Young's modulus (from 108.494 to 93.385 GPa) and microhardness (from 4.983 to 4.667 GPa), which is consistent with lower bond strength and decreased compactness. Optically, a redshift in the UV–Vis absorption edge was observed, along with a decline in both the direct (from 3.016 to 2.801 eV) and indirect (from 2.931 to 2.272 eV) optical bandgaps, while Urbach energy increased from 0.311 to 0.347 eV, reflecting higher structural disorder. Radiation shielding analysis revealed that higher BaO levels enhanced the linear attenuation coefficients (LACs) at 0.015 MeV, from 133.567 to 174.656 cm⁻¹, correlating with their respective BaO content and density. For mass attenuation coefficients (MACs), BMZS4 exhibited the highest values at 0.015 MeV (40.703 cm²/g), while the values decreased exponentially with energy increase. The effective atomic number (Z_eff) for BMZS4 started at 44.76 at 0.015 MeV and exhibited a decreasing trend with energy, signifying its superior shielding strength. Sample BMZS4 (35 mol% BaO) exhibited the lowest mean free path (MFP) and tenth value layer (TVL), making it the most effective in radiation shielding. Across all energy ranges, BMZS4 consistently outperformed the other compositions due to its higher density and BaO content. Comparative HVL analysis showed that BMZS2-4 glasses offer superior shielding capability over some conventional glass systems at 0.40 MeV. These findings suggest that increasing BaO content systematically modifies the glass network, facilitating application-specific tuning, particularly in optical and radiation protection domains where transparent materials are required.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100949"},"PeriodicalIF":6.7,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the practical magnetic properties of permanent magnets in multi-source magnetic devices via cross-scale micromagnetic simulation method","authors":"Zhengping Sun,&nbsp;Lei Li,&nbsp;Guolai Yang,&nbsp;Xinyu Zheng","doi":"10.1016/j.jsamd.2025.100940","DOIUrl":"10.1016/j.jsamd.2025.100940","url":null,"abstract":"<div><div>In multi-source magnetic devices (MSMDs), the magnetization states of permanent magnets (PMs) are affected by the superimposed magnetic fields generated by surrounding PMs, making the accurate evaluation and selection of their practical magnetic properties highly challenging. This interference is particularly pronounced in complex magnetic systems such as Halbach arrays, where conventional nonlinear magnetization models often produce distorted or unreliable results. To address this issue, we propose a cross-scale numerical method based on magnetic moment dynamics to assess the practical magnetic performance of PMs within MSMDs. This method establishes a reference framework for applying micromagnetic simulations to the magnetic performance evaluation of macroscale, device-level permanent magnets. An intrinsic magnetization model is developed by coupling the Maxwell and Landau–Lifshitz–Gilbert (LLG) equations with thermomagnetic interactions. The coercivity and dominant magnetization reversal mechanisms (nucleation and pinning) are calibrated using a 3D Voronoi-based polycrystalline parameterization. A cross-scale simulation framework is constructed by scaling the effective dimensions of the main magnetic phase through spatially distributed damping correction coefficients. With strong agreement between micromagnetic simulations and experimental demagnetization curves, the equivalent remanence and demagnetization rates of various sintered NdFeB magnets are evaluated at different positions within existing Halbach-type permanent magnet excited coaxial drives (PMECDs) and permanent magnet synchronous machines (PMSMs). Key findings include field attenuation caused by local magnetization reversal and multi-domain formation due to self-demagnetization in Halbach arrays. The proposed method offers a reliable reference for magnetic performance assessment and pre-design optimization of PMs in MSMD applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100940"},"PeriodicalIF":6.7,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and analysis of flexible Mn–Co ferrite material incorporating dual-Rectangular nested resonator (DRNR) for enhanced oil impurity sensing","authors":"Md.Golam Rabbani ,&nbsp;Mohammad Tariqul Islam ,&nbsp;Mohamad A. Alawad ,&nbsp;Norbahiah Misran ,&nbsp;Yazeed Alkhrijah ,&nbsp;Abdulmajeed M. Alenezi","doi":"10.1016/j.jsamd.2025.100948","DOIUrl":"10.1016/j.jsamd.2025.100948","url":null,"abstract":"<div><div>A flexible microwave material incorporating Mn–Co ferrite nanoparticles, synthesized via the sol-gel method, was developed for oil impurity detection within the 2–6 GHz frequency range. Structural analysis using X-ray diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM) revealed crystallite sizes of 21.67–22.53 nm and lattice constants ranging from 9.6873 to 9.7423 Å, dependent on composition. Vibrating Sample Magnetometer (VSM) analysis revealed that the Mn–Co ferrite nanocomposites exhibit robust ferromagnetic behavior, with saturation magnetization ranging from 58.50 emu/g to 24.51 emu/g as manganese content increases, highlighting the tunability of their magnetic properties. The polyvinyl alcohol (PVA)-based material exhibited a dielectric constant (ε_r) of 6.63 and an increasing loss tangent (T_δ) from 0.0224 to 0.3254 with higher Mn content. The Dual-Rectangular Nested Resonator (DRNR) design demonstrated resonance at 3.008 GHz, 3.948 GHz, 4.72 GHz, 5.356 GHz, and 5.604 GHz, with attenuation levels between −46.50 dB and −21.07 dB. The sensor effectively identified oil levels, distinguishing olive oil (ε_r = 3.03) and palm oil (ε_r = 3.18), offering a compact, high-sensitivity solution for oil impurity detection and advanced microwave applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100948"},"PeriodicalIF":6.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and antibacterial behaviors of tin dioxide thin films on copper substrates","authors":"Dikra Bouras ,&nbsp;Mamoun Fellah ,&nbsp;Meryem Mokrani ,&nbsp;Regis Barille ,&nbsp;Hind Saidani Scott ,&nbsp;Ahlem Guesmi ,&nbsp;Lotfi Khezami","doi":"10.1016/j.jsamd.2025.100943","DOIUrl":"10.1016/j.jsamd.2025.100943","url":null,"abstract":"<div><div>Tin dioxide (SnO₂) thin films were deposited on copper substrates using a spin-coating technique, where a precursor solution of tin chloride (SnCl₂) in methanol and distilled water was applied. The films were annealed at 300 °C to enhance crystallinity. The study investigates how varying SnO₂ layer thicknesses (3 and 9 layers) on Cu substrate influence structural, optical, and antibacterial properties. Characterization techniques included X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), UV–visible spectroscopy, and Fourier-transform infrared (FTIR). The study specifically examines the effects of varying SnO₂ layer numbers (3 and 9) on the properties of the composite. Results indicate that increasing SnO₂ layers affect surface roughness, grain size, optical characteristics, and antibacterial efficacy. XRD analysis revealed a shift in the diffraction pattern, indicating lattice expansion with more layers. SEM analyses identify increased porosity and decreased density, while AFM confirms an increase in roughness with the number of layers. The multilayer system exhibits anisotropic magnetic properties suitable for magnetic and spintronic applications, as evidenced by SQUID magnetometer measurements that reveal a 100 Oe difference in coercive fields between parallel and perpendicular field orientations. As SnO₂ thickness increases, bandgap energies decrease from 3.93 eV (Cu) to 3.89 eV (3 layers) and 3.81 eV (9 layers), as determined by Tauc plots assuming direct transitions (αhν)² vs hν, indicating tunable optical properties. The FTIR spectra of SnO₂/Cu films display characteristic SnO₂ bands and hydroxyl-related peaks, with increased SnO₂ layers resulting in reduced transmittance and more pronounced peaks. Antibacterial activity (n = 5 replicates) of the SnO₂/Cu composite against <em>Pseudomonas aeruginosa</em> improves with additional SnO₂ layers, showing statistically significant (p &lt; 0.05, ANOVA) inhibition zones of 17 ± 0.81 mm for Cu, 21 ± 0.98 mm for 3 layers, and 32 ± 1.57 mm for 9 layers. The activity is attributed to the synergistic effects of Cu²⁺ ions and Sn⁴⁺ions, which generate reactive oxygen species that disrupt bacterial membranes, DNA, and cellular structures.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100943"},"PeriodicalIF":6.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic torque-based method for quantifying the flexural rigidity of microfibers","authors":"Artis Brasovs ,&nbsp;Konstantin G. Kornev","doi":"10.1016/j.jsamd.2025.100942","DOIUrl":"10.1016/j.jsamd.2025.100942","url":null,"abstract":"<div><div>Probing the flexural rigidity of micropillars and microfibers is challenging as they are short and difficult to handle. We developed a magnetic torque methodology where a coil-generated uniform magnetic field acts on a magnetic microrod attached to the fiber end, forcing it to turn. It is shown that magnetic torque bends microfibers in a circular arc, whose radius depends on the flexural rigidity. Magnetic microrods were fabricated by electroplating nickel on tungsten microwires. The methodology was validated with synthetic microfibers. Available magnetic stages for optical microscopes offering uniform magnetic fields within a millimeter-wide spot can be implemented to study a variety of beam-like microstructures.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100942"},"PeriodicalIF":6.7,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental optimization and machine learning modeling for sustainable Congo red dye removal from wastewater using activated goat bone biochar","authors":"Ghazala Muteeb ,&nbsp;Adil Alshoaibi ,&nbsp;Khalid Ansari","doi":"10.1016/j.jsamd.2025.100947","DOIUrl":"10.1016/j.jsamd.2025.100947","url":null,"abstract":"<div><div>This study explores the use of goat bone-based activated biochar (GB_PAC) synthesized from animal waste as an efficient and sustainable adsorbent for removing Congo Red (CR) dye from aqueous solutions. GB_PAC, prepared through chemical activation with phosphoric acid, was tested in batch adsorption experiments. FTIR analysis revealed key functional groups such as hydroxyl (O–H), carboxyl (C<img>O), and phosphate groups, which play a crucial role in the adsorption of CR dye through interactions like hydrogen bonding and electrostatic attraction. BET surface area analysis showed that GB_PAC exhibited a surface area of 91.27 m²/g, with a mesoporous structure that enhances its adsorption capacity. The study systematically analyzed factors such as dye concentration (10–50 mg/L), adsorbent dosage (0.15–0.75 g/100 mL), pH (7.5), and contact time (30–180 min). The maximum adsorption capacity of GB_PAC for CR dye was 83.33 mg/g, and the adsorption process followed the Langmuir isotherm model (R² = 0.9907) and pseudo-second-order kinetics. Process Optimization was performed using Response Surface Methodology (RSM), which enabled statistically guided experimental design and optimization of influential variables. Optimal conditions were identified as 48.596 mg/L dye concentration, 0.398 g adsorbent dose, and 88.23 min contact time, achieving a predicted removal efficiency of 94.34 %. To enhance prediction capabilities, machine learning (ML) models, specifically Decision Tree and Random Forest, were trained using experimental data. These models demonstrated strong predictive accuracy, with R² values of 0.91 and 0.87, respectively. This dual-framework approach, combining RSM for optimization and ML for predictive modeling, underscores the novelty of using waste-derived GB_PAC for wastewater treatment applications. The findings support GB_PAC as a cost-effective, sustainable, and data-driven solution for CR dye removal from contaminated water.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100947"},"PeriodicalIF":6.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature-dependent properties of Cu-doped ZnTe thin films deposited on SLG substrates via RF magnetron sputtering and E-beam techniques","authors":"Sherif Salah ,&nbsp;Camellia Doroody ,&nbsp;Fazliyana ‘Izzati Za'abar ,&nbsp;Zheng-Jie Feng ,&nbsp;Prajindra Sankar Krishnan ,&nbsp;Ahmad Wafi Mahmood Zuhdi ,&nbsp;Muhammad Najib Harif ,&nbsp;Nur Irwany Ahmad ,&nbsp;Yap Boon Kar ,&nbsp;Mohammad Nur-E-Alam","doi":"10.1016/j.jsamd.2025.100944","DOIUrl":"10.1016/j.jsamd.2025.100944","url":null,"abstract":"<div><div>Copper doping in zinc telluride (ZnTe) thin films has been extensively studied for optoelectronic applications; however, challenges remain in optimizing temperature-dependent diffusion while minimizing defect-related emissions. Although numerous studies have explored Cu-doped ZnTe, comprehensive investigations using electron-beam (E-beam) evaporation remain limited, especially concerning its influence on diffusion dynamics, defect formation, and electrical properties. This study systematically examined Cu-doped ZnTe films fabricated via E-beam evaporation with a fixed 50 nm Cu layer deposited at three substrate temperatures (RT, 150 °C, and 300 °C), followed by rapid thermal annealing (RTA) at 100 °C and 200 °C for 1 h under a nitrogen atmosphere. An as-cast (non-annealed) sample was also analyzed as a baseline reference. By investigating the interplay between deposition and annealing temperatures, this work provided new insights into temperature-driven diffusion control mechanisms and their influence on the structural, morphological, and electrical properties of ZnTe: Cu films. The optimal sample (ZT-Cu_150_A200) exhibited a carrier concentration of 1.33 × 10²⁰ cm⁻³, a resistivity of 3.77 × 10⁻⁵ Ω cm, and a mobility of 1.68 × 10³ cm²/V·s, significantly improving electrical conductivity while minimizing defect-related losses. These findings establish a crucial correlation between thermal activation, Cu diffusion dynamics, and defect passivation, offering a refined approach for optimizing Cu-doped ZnTe thin films for enhanced electronic performance.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100944"},"PeriodicalIF":6.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-dimensional SiC-based heterostructures for advanced lithium-ion batteries: A first-principles study","authors":"Wanjun Yan ,&nbsp;Xin Tang ,&nbsp;Yutao Liu ,&nbsp;Tinghong Gao ,&nbsp;Fuhong Ren ,&nbsp;Nan Wang ,&nbsp;Guiyang Liu","doi":"10.1016/j.jsamd.2025.100946","DOIUrl":"10.1016/j.jsamd.2025.100946","url":null,"abstract":"<div><div>The integration of two-dimensional (2D) materials into heterostructures provides an effective approach to designing advanced electronic devices by synergistically combining the advantages of constituent monolayers. In this study, we employ density functional theory (DFT) to systematically evaluate three SiC-based heterostructures (SiC/graphene, SiC/BN, and SiC/MoS₂) as high-performance anode candidates for lithium-ion batteries. To assess the potential of these SiC-based heterostructures, their geometric structures, electronic structures, Li adsorption and migration properties, and electrochemical properties were investigated. Results illustrate that these heterostructures exhibit enhanced mechanical robustness, with Young's modulus surpassing that of individual monolayers. Ab initio molecular dynamics (AIMD) simulations reveal that these SiC-based heterostructures can maintain good structural stability during lithiation at 300 K. With the introduction of other 2D anode materials, the lithiated SiC-based heterostructures exhibit enhanced electrical conductivity, high theoretical specific capacity, and acceptable diffusion barriers, which are crucial for maintaining high multiplicity performance of lithium-ion batteries. These findings indicate the remarkable potential of SiC-based heterostructures as ideal anode materials for lithium-ion batteries.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100946"},"PeriodicalIF":6.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of interface and configuration on dynamic mechanical properties of bilayer B4C/Al composites","authors":"Tian Luo ,&nbsp;Zhenlong Chao ,&nbsp;Longtao Jiang ,&nbsp;Shengpeng Chen ,&nbsp;Siyun Li ,&nbsp;Yanxiong Meng ,&nbsp;Huimin Han ,&nbsp;Shanqi Du ,&nbsp;Bingzhuo Han ,&nbsp;Runwei Zhang ,&nbsp;Mingqi Liu ,&nbsp;Guoqin Chen","doi":"10.1016/j.jsamd.2025.100941","DOIUrl":"10.1016/j.jsamd.2025.100941","url":null,"abstract":"<div><div>Layered materials have gained widespread attention in armor protection due to their unique designability, structure-function integration, and cross-scale synergistic effects. The interface and material configuration are key determinants of the dynamic mechanical properties of layered materials. This study focuses on these factors by fabricating bilayer B₄C/Al composites with a continuous aluminum matrix and varying reinforcement content gradients. The resulting bilayer structure exhibited an interfacial tensile strength of up to 326 MPa, significantly surpassing the bonding strength of epoxy resin. Under dynamic loading, the continuous matrix structure demonstrated superior compressive strength and energy absorption capacity, due to efficient strain transfer and coordinated deformation facilitated by strong interfacial bonding, which enhanced the synergy between layers. Digital image correlation (DIC) analysis revealed that the strain transfer efficiency near the interface in the continuous matrix structure reached 78 %, markedly higher than the 19 % observed in bonded structures. Finite element simulations further elucidated the influence of reinforcement gradients on stress-strain distribution and failure mechanisms. A larger reinforcement gradient intensified strain mismatch near the interface, inducing premature shear failure in the hard layer due to transverse volumetric expansion. For optimal material configurations, the compressive strength of the soft layer should exceed the yield strength of the hard layer to facilitate plastic zone expansion during compression and promote continuous strain hardening. These findings highlight the critical role of interface design and structural configuration in governing the dynamic mechanical performance of layered materials.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100941"},"PeriodicalIF":6.7,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TiO2/SnO2 photocatalysts by electrospinning and atomic layer deposition for pharmaceutical contaminant removal","authors":"Tia Maria Howayek ,&nbsp;Mahmoud Abid ,&nbsp;Haitham Maslouh ,&nbsp;Roman Viter ,&nbsp;Djamel Bezzerga ,&nbsp;Jisang Hong ,&nbsp;Amr A. Nada ,&nbsp;Marc Cretin ,&nbsp;Igor Iatsunskyi ,&nbsp;Emerson Coy ,&nbsp;Loïc Assaud ,&nbsp;David Cornu ,&nbsp;Roland Habchi ,&nbsp;Mikhael Bechelany","doi":"10.1016/j.jsamd.2025.100945","DOIUrl":"10.1016/j.jsamd.2025.100945","url":null,"abstract":"<div><div>Advanced technologies, including photocatalysis, are required to address the increasing global need for clean water. Titanium dioxide (TiO₂) is often used as a photocatalyst for pollutant removal, but its performance is hampered by its large band gap and fast charge carrier recombination. This study describes the synthesis, characterization, and photocatalytic performance of TiO₂/tin oxide (SnO₂) core-shell nanofibers for the degradation of acetaminophen (ACT), a persistent pharmaceutical pollutant. TiO₂ nanofibers, fabricated by electrospinning, were coated with thin SnO₂ films by atomic layer deposition (ALD). After their structural, morphological, and chemical characterization, TiO₂ and TiO₂/SnO₂ composites were tested as photocatalysts to degrade ACT under UV light. Within 40 min, 99.8 % and 70 % of ACT was degraded in the presence of the optimal TiO₂/SnO₂ composite (SnO₂ layer thickness of 5 nm) and of TiO₂ nanofibers, respectively. Moreover, the optimal TiO₂/SnO₂ composite showed excellent recyclability and stability over five consecutive cycles. Hydroxyl radicals (^•OH), superoxide anions (^•O₂⁻), and holes (h⁺) were the main reactive species implicated in ACT removal. Density functional theory (DFT) modeling confirmed that the band alignment between TiO₂ and SnO₂ enhanced charge separation. This study demonstrates that TiO₂/SnO₂ is a promising photocatalyst for removing pharmaceutical contaminants from the environment.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100945"},"PeriodicalIF":6.7,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}