Journal of Science: Advanced Materials and Devices最新文献

{"title":"Charge transfer and PMS activation in high-entropy spinel oxide-based Z-scheme heterojunctions for ciprofloxacin degradation","authors":"Xinmiao Yu ,&nbsp;Shifa Wang ,&nbsp;Peilin Mo ,&nbsp;Huajing Gao ,&nbsp;Changhua Wang","doi":"10.1016/j.jsamd.2026.101100","DOIUrl":"10.1016/j.jsamd.2026.101100","url":null,"abstract":"<div><div>The low charge transfer and separation efficiency of high-entropy oxides remain the urgent problems that need to be solved to limit their application in the field of photocatalysis. A low-temperature sintering technology combined with polyacrylamide gel method was used to synthesis a series of Z-scheme heterojunctions (Ni_0.2Zn_0.2Mg_0.2Cu_0.2Co_0.2)[Al_0.9(Cr_0.025Fe_0.025Mn_0.025Co_0.025)]₂O₄/photinia leaves (A/Ps) with the diverse mass percentages of A/Ps, namely 9:1 (S1), 8:2 (S2), and 7:3 (S3) to enhance the photocatalytic activity of high-entropy oxides. The C element in Ps, the continuous reaction of various multivalent metals, and the electron transfer pathway are conducive to the available active Peroxomonosulfate (PMS). The degradation percentage of Ciprofloxacin (CIP) by S3/PMS/vis reaches 82.6 % within 20 min, surpassing the Ps/vis, A/vis and S3/vis for 5.39, 2.07 and 2.96 times, respectively. The S3/PMS/vis exhibits high charge transfer and separation efficiency, excellent cyclic and structural stability, which is suitable for diverse environmental conditions, and demonstrates a remarkable degradation percentage. Density functional theory (DFT) is employed to investigate the variation of adsorption energy in different catalysis systems. The degradation pathway and ecotoxicity of CIP are assessed to confirm the effective degradation of CIP by S3/PMS/vis and emphasize that the charge transfer and photo-activation PMS are effective strategies for removing pollutants from natural water bodies.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101100"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977496","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":"Engineering novel nanocomposites containing multiphase metal borates and carbon for basic blue 41 sequestration from wastewater","authors":"Ehab A. Abdelrahman ,&nbsp;Mohamed R. Elamin ,&nbsp;Nada S. Al-Kadhi ,&nbsp;Reem K. Shah ,&nbsp;Sawsan Alashqar","doi":"10.1016/j.jsamd.2026.101103","DOIUrl":"10.1016/j.jsamd.2026.101103","url":null,"abstract":"<div><div>Basic blue 41 is a persistent cationic dye whose intense color and high stability threaten aquatic ecosystems and degrade water quality even at low levels. Continued exposure can promote oxidative stress and possible genotoxic effects in living organisms, so its removal from wastewater is essential. In this study, the precursor produced by a facile Pechini sol–gel route was calcined at 500 and 700 °C to obtain Mg₂B₂O₅/Sr₂B₂O₅/MnO₂/C (MBSM500) and Mg₂B₂O₅/SrB₂O₄/Mn₂(BO₃)O/C (MBSM700) nanocomposites, respectively, for efficient adsorption of basic blue 41 from wastewater. XRD verified the production of well-crystallized multiphase structures with average crystal sizes of 49 nm concerning MBSM500 as well as 63 nm concerning MBSM700. EDX revealed B, C, O, Mg, Mn, and Sr in both materials, with MBSM500 containing more residual carbon, while MBSM700 exhibited relatively higher Mg, Mn, and Sr contents. FE-SEM and HR-TEM images showed highly agglomerated plate- and flake-like particles for MBSM500 and denser aggregates of larger quasi-spherical nanograins for MBSM700. Under the optimal operating conditions (initial dye concentration = 250 mg/L, pH = 10, and T = 298 K), MBSM500 removed 98.58 % of basic blue 41 within 60 min, whereas MBSM700 achieved 73.03 % removal in 80 min. Adsorption studies yielded maximum Langmuir capacities of 373.13 mg/g concerning MBSM500 as well as 290.69 mg/g concerning MBSM700. Thermodynamic and kinetic analyses demonstrated that basic blue 41 uptake is physically exothermic and spontaneous and follows the pseudo-first-order rate model and Langmuir monolayer isotherm behavior. Both nanocomposites could be effectively regenerated by acid elution and reused over several cycles while maintaining high performance in real laboratory wastewater, which highlights their promise as practical adsorbents for treating basic blue 41 contaminated effluents.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101103"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034361","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":"Glycine-functionalized Ti3C2Tx MXene with improved material properties for concurrent Sn2+ oxidation mitigation and defect passivation in efficient tin halide perovskite solar cells","authors":"Aseel j. Mohammed ,&nbsp;Wala Dizayee ,&nbsp;Ismail Ibrahim Marhoon ,&nbsp;Mohammed Ahmed Mohammed ,&nbsp;Mohammed Zorah ,&nbsp;Zainab Shaker Matar Al-Husseini ,&nbsp;Mohamed Shabbir Abdulnabi ,&nbsp;G. Abdulkareem-Alsultan ,&nbsp;Maadh Fawzi Nassar","doi":"10.1016/j.jsamd.2025.101085","DOIUrl":"10.1016/j.jsamd.2025.101085","url":null,"abstract":"<div><div>Lead-free tin halide perovskites constitute a nontoxic alternative to lead-based solar absorbers, but their development is stifled by low performance and material instability, attributed primarily to Sn²⁺ oxidation, high levels of defects, and slow charge transfer. We demonstrate glycine-functionalized Ti₃C₂T_x MXene (MXG) as a multifunctional additive in FASnI₃ perovskite films. The amino groups on MXG have a two-fold role in that they chemically passivate the under-coordinated Sn sites and iodine vacancies, while at the same time providing moderate reductants to suppress Sn²⁺ oxidation. Aside from passivation, the MXene with layered conductive properties also acts as a favorable template for perovskite crystallization, allowing the vertical grain orientation for better light absorption into the absorber layer, improveing interfacial connection between layers and charge carrier transfer/extraction. For the MXG devices, better film quality and reduced trap state density and carrier lifetime with enhanced energy level alignment were observed. The champion MXG/FASnI₃ device shows a power conversion efficiency of 15.82 % with improved stability (maintaining over 94 % of its initial efficiency after 1000 h). This investigation highlights the dual electrical and structural benefits of MXene engineering toward achieving earth‐abundant, efficient, stable, and scalable Sn perovskite PVs.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101085"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837500","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":"Sn4+-modified Ti-rich CaCu3Ti4.5O12 ceramics with low loss and X8R-Grade thermal stability prepared by polymer pyrolysis","authors":"Ekaphan Swatsitang ,&nbsp;Sasitorn Putjuso ,&nbsp;Anuchit Hunyek ,&nbsp;Thanin Putjuso","doi":"10.1016/j.jsamd.2025.101086","DOIUrl":"10.1016/j.jsamd.2025.101086","url":null,"abstract":"<div><div>Sn⁴⁺ substitution at the Ti sites of CaCu₃Ti_4.5O₁₂ ceramics was successfully achieved via a polymer pyrolysis technique. The effects of Sn⁴⁺ incorporation on the dielectric and nonlinear electrical properties were systematically examined. XRD and FE-SEM analyses confirmed the coexistence of CaCu₃Ti₄O₁₂ and TiO₂ phases with refined grains and uniformly dispersed secondary phases, while EDXS mapping revealed suppressed CuO segregation together with enhanced TiO₂ homogeneity along grain boundaries. Consequently, the CaCu₃Ti_4.3Sn_0.2O₁₂ ceramic sintered at 1060 °C for 6 h exhibited a high permittivity (ε′ ≈ 7.45 × 10³) and ultralow dielectric loss (tan δ = 0.027 at 1 kHz, 30 °C)<strong>,</strong> together with excellent temperature stability (Δε' &lt; ±15 % from −60 to 150 °C)<strong>,</strong> meeting the X8R capacitor standard<strong>.</strong> Nonlinear <em>J–E</em> analysis revealed a significant enhancement in α (≈35.9) and E_b (≈1.32 × 10⁴ V cm⁻¹)<strong>,</strong> suitable for varistor applications. The improved dielectric and nonlinear responses stemmed from increased grain-boundary resistance (<em>R</em>_gb ≈ 224.1 kΩ cm) and higher barrier height (Φ_B ≈ 1.15 eV), both induced by Sn⁴⁺ substitution and microstructural refinement. XANES results revealed a slight Ti⁴⁺ → Ti³⁺ reduction, enhancing small-polaron hopping in semiconducting grains and maintaining strong grain-boundary insulation, which together shape the dielectric and nonlinear behaviors. These synergistic effects enable high stability, low loss, and strong non-Ohmic performance, positioning Sn-doped CaCu₃Ti_4+<em>x</em>O₁₂ ceramics as promising candidates for next-generation capacitor–varistor integration.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101086"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837498","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":"Polymer matrix composites as radar-absorbent materials in the X-Band: A comprehensive review","authors":"Aravind Rajan Ayagara ,&nbsp;Subramanyam Vijayasaradhi ,&nbsp;Sai Adithya Vanga ,&nbsp;Mayur Shriram Kannadkar ,&nbsp;André Langlet","doi":"10.1016/j.jsamd.2025.101083","DOIUrl":"10.1016/j.jsamd.2025.101083","url":null,"abstract":"<div><div>Recent advancements in stealth technology have intensified the demand for radar-absorbing materials (RAMs) that combine superior attenuation performance with structural integrity. This review systematically examines carbon-based RAMs, specifically polymer nanocomposites reinforced with carbon-based nanofillers, emphasizing their dual role in enhancing electromagnetic absorption and mechanical performance. This work uniquely integrates the mechanical behavior of these materials, providing a comprehensive understanding of filler dispersion, interfacial interactions, and their influence on dielectric loss and load-bearing capabilities. Comparative analysis across multiple studies highlights how processing routes, filler morphology, and multi-layer configurations affect reflection loss (RL), impedance matching, and bandwidth within the X-band (8.2–12.4 GHz). Hybrid and multilayer systems demonstrate synergistic effects, achieving broadband absorption exceeding 4 GHz with RL values below −40 dB, while maintaining enhanced tensile and flexural strengths at optimal filler loadings. The review further delineates fabrication methods, scaling challenges, and optimization strategies essential for practical implementation. Finally, emerging trends like multifunctional and hybrid nanofillers, lightweight foamed architectures, and surface-functionalized composites are discussed as promising pathways toward durable, scalable, and structurally integrated carbon-based RAMs for next-generation defense and aerospace platforms.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101083"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880863","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":"Strontium-induced phase transition and dielectric relaxation in PZT-AlSb ceramics","authors":"Bahia Messai ,&nbsp;Rachid Makhloufi ,&nbsp;Ahcen Keziz ,&nbsp;Chaima Benbrika ,&nbsp;Mourad Nouiri ,&nbsp;Ali Ismael ,&nbsp;Taha Abdel Mohaymen Taha","doi":"10.1016/j.jsamd.2025.101088","DOIUrl":"10.1016/j.jsamd.2025.101088","url":null,"abstract":"<div><div>Lead zirconate titanate (PZT) ceramics remain central to high-performance piezoelectric and dielectric technologies. In this work, (Pb_1-xSr_x[(Zr_0.52Ti_0.43)(Al_0.5Sb_0.5)_0.05]O₃ (PZT-SAS) ceramics with SrO substitution levels x = 0.02, 0.04, 0.06, and 0.08 were synthesized via the solid-state reaction route to investigate the structural, microstructural, and dielectric responses arising from coupled Sr²⁺, Al³⁺/Sb⁵⁺ amphoteric co-doping. X-ray diffraction (XRD) analysis confirmed mixed tetragonal–rhombohedral phase coexistence across all compositions. Deconvolution of the (002)T/(200)T/(202)R reflections in the 42°–47° range showed systematic evolution of phase fractions, where the tetragonal content increased from ∼38 % at x = 0.02–∼57 % at x = 0.08. Fourier-transform infrared (FTIR) spectra exhibited a dominant M − O vibrational band at 530.5 cm⁻¹, characteristic of BO₆ octahedral bonding in perovskites. Microstructural analysis revealed significant grain coarsening with Sr addition: average grain size increased from ∼1.8 μm (x = 0.02) to ∼4.6 μm (x = 0.08), accompanied by improved densification, where the bulk density rose from 5.26 g/cm³ to 6.12 g/cm³. Impedance spectroscopy showed typical NTCR behavior, with decreasing Z′ and Z″ across 600–700 K, and Nyquist plots exhibited single depressed semicircles indicative of non-Debye relaxation dominated by grain and grain-boundary contributions. Increasing Sr content reduced grain-boundary resistance and shifted relaxation peaks toward higher frequencies. AC conductivity followed Jonscher's power law, showing a low-frequency σ_dc plateau and a high-frequency dispersion region attributed to hopping conduction of localized charge carriers. These findings demonstrate that Sr/PZT-SAS ceramics offer a promising pathway for developing high-performance dielectric materials with controlled phase composition, low loss, and improved conductivity behavior.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101088"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880923","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":"Tailoring anisotropy and mechanical performance of additively manufactured PEKK through annealing and architected design","authors":"F. Malekpour ,&nbsp;M. Hojjati","doi":"10.1016/j.jsamd.2025.101077","DOIUrl":"10.1016/j.jsamd.2025.101077","url":null,"abstract":"<div><div>Processing and post-processing parameters critically determine the structural performance of additively manufactured parts. Poly-ether-ketone-ketone (PEKK), a high-performance thermoplastic, offers considerable promise for aerospace applications. However, its mechanical behavior in material extrusion (MEX) remains constrained by pronounced anisotropy and weak interlayer bonding. Addressing these limitations requires understanding how printing architecture and post-processing jointly influence mechanical response. Therefore, the objective of this study is to evaluate the effectiveness of an optimized annealing protocol, established in our previous work (210 °C for 30 min), in reducing anisotropic behavior and enhancing mechanical performance across different raster orientations and architected structures. Tensile and flexural coupons were fabricated at raster angles of 0°, ±45°, and 90° using three infill patterns (line, concentric, and mixed) and tested before and after annealing. Additionally, compressive coupons of Schwarz G and Schwarz P lattices with 40 % relative density were examined to represent structural architected geometries, tested both parallel and perpendicular to the print-layer direction. Results show that reinforcement by annealing is pattern-dependent. At the maximum reinforcement, concentric infill yielded the greatest tensile strength improvement (29.5 %), whereas the 90° raster exhibited the largest flexural strength gain (17.6 %). For structural lattices, compressive strength increased by 37.5 % in Schwarz G, while a reduction of 18.6 % was observed in Schwarz P. While annealing enhanced stiffness, strength, and thermal stability, it also introduced dimensional changes and occasional void-related defects. Overall, this study demonstrates the interplay between anisotropic printing architecture and post-processing, providing pathways to tailor PEKK components for aerospace and structural applications requiring either superior strength (annealed) or enhanced toughness (as-printed).</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101077"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798204","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":"Tailoring the structural and functional properties of B2O3-PbO2-BaO-CaO-Sm2O3 glass system for potential radiation shielding applications","authors":"M.I. Sayyed ,&nbsp;Mohammad W. Marashdeh ,&nbsp;Ashok Kumar ,&nbsp;Sabina Yasmin","doi":"10.1016/j.jsamd.2025.101082","DOIUrl":"10.1016/j.jsamd.2025.101082","url":null,"abstract":"<div><div>This study investigates the physical, structural, and radiation shielding properties of a B₂O₃-PbO₂-BaO-CaO-Sm₂O₃ glass. The density increases (3.953–4.388 g/cm³) with higher BaO and Sm₂O₃ content due to the incorporation of heavier elements. The molar volume shows non-linear trends attributed to competing effects of Sm³⁺ ion incorporation and network disruption. The FTIR spectroscopy revealed structural changes. The formation of non-bridging oxygen (NBO) improves with rising Sm₂O₃ content. The elastic moduli decrease with Sm₂O₃ content. The mass attenuation coefficients (MAC) are investigated at energies corresponding to those emitted from Eu-152 source using Phy-X software. The MAC at 0.122 MeV was found to range from 1.179 to 1.264 cm²/g. The effective atomic number for 1 S m sample shows a high value of 46.33 at 0.122 MeV. The half value layer for 1 S m sample is 0.149 cm at 0.122 MeV. Among the prepared glasses, the glass with the composition 11PbO₂-25BaO-10CaO-50B₂O₃-4Sm₂O₃ exhibited the highest MAC.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101082"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798231","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 of a pH-Responsive Co1-XS@Chi-TPP nanoplatform for dual antibacterial and anticancer therapy","authors":"Aida Abdoli,&nbsp;Vahid Sabaghi,&nbsp;Fatemeh Davar","doi":"10.1016/j.jsamd.2025.101091","DOIUrl":"10.1016/j.jsamd.2025.101091","url":null,"abstract":"<div><div>Monodisperse Co_1-XS nanospheres were synthesized via a solvothermal method. To enhance their stability and performance, the cobalt sulfide nanospheres were surface-modified using chitosan cross-linked with tripolyphosphate (Chi-TPP). Subsequently, doxorubicin (DOX), a widely used chemotherapeutic drug, was loaded onto the Co_1-XS@Chi-TPP nanoplatforms. The DOX release studies under different simulated conditions demonstrated pronounced pH-responsive behavior, with 63 % cumulative release observed in the simulated tumor microenvironment (TME) after 24 h. Kinetic and dynamic light scattering (DLS) analyses revealed that DOX release is mainly diffusion-controlled at physiological pH but accelerated under acidic TME conditions, reflecting the pH-responsive, multiphasic behavior of the nanosystem driven by polymer swelling. The Co_1-XS@Chi-TPP nanoplatforms exhibited antibacterial activity with MIC values of 0.25–4 mg mL⁻¹ for <em>Staphylococcus aureus (Staph.)</em> and 1–4 mg mL⁻¹ for <em>Escherichia coli (E. coli)</em>, and an MBC of 1 mg mL⁻¹ for both strains, indicating their dual functional potential as drug carriers and antimicrobials. The Co_1-XS@Chi-TPP@DOX nanosystem displayed low cytotoxicity toward MCF7 cells at lower concentrations, with an IC₅₀ of approximately 300 μg mL⁻¹, suggesting a potentially favorable therapeutic index. The nanosystem demonstrated high blood compatibility and minimal hemolytic activity, supporting a broad therapeutic window for safe and effective DOX delivery.The results demonstrate that Co_1-XS-based nanocarriers can simultaneously enhance the precision and safety of cancer treatments, offering a significant stride toward more successful and less harmful chemotherapeutic strategies.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101091"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145926406","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":"Fascinating opto-gas sensors development based on Ti1−xErxO2 thin films for environmental and optoelectronic devices","authors":"R. Balaji ,&nbsp;Pandurangan Mohan ,&nbsp;S. Vinoth ,&nbsp;Muhammad Hadi ,&nbsp;I.M. Ashraf ,&nbsp;Khursheed B. Ansari ,&nbsp;Mohd Taukeer Khan ,&nbsp;Sambasivam Sangaraju ,&nbsp;Mohd Shkir","doi":"10.1016/j.jsamd.2026.101096","DOIUrl":"10.1016/j.jsamd.2026.101096","url":null,"abstract":"<div><div>This study investigates the gas-sensing performance of <span><math><mrow><msub><mrow><mi>T</mi><mi>i</mi></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mrow><mi>E</mi><mi>r</mi></mrow><mi>x</mi></msub><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> thin films doped with varying Er concentrations (0–5 wt.%) synthesized via nebulizer spray pyrolysis (NSP) technique. X-ray diffraction (XRD) confirmed the formation of anatase TiO₂, with crystallite size increasing to 45 nm for the TiO₂:Er (4 wt%) film. FESEM analysis revealed uniformly distributed spherical grains, with the largest particle size also observed at 4 wt% Er. Optical transmittance measurements showed high transparency of ∼80 % in the visible region, while the optical bandgap varied from 3.43 to 3.59 eV, reaching its maximum for the 4 wt% Er-doped film. Photoluminescence spectra exhibited enhanced emission intensity at 4 wt%, indicating increased oxygen vacancies and higher recombination rates of photoinduced carriers. Gas sensing studies demonstrated a significant improvement in NH₃ detection at room temperature, with the TiO₂:Er (4 wt%) film achieving a peak response of 70 at 250 ppm, along with rapid response and recovery times of 3 s and 6.3 s, respectively. These results highlight the TiO₂:Er (4 wt%) thin film as an efficient and stable NH₃ sensor, emphasizing the effectiveness of rare-earth doping for enhancing metal oxide gas sensor performance.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"11 1","pages":"Article 101096"},"PeriodicalIF":6.8,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977499","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}