Pub Date : 2026-01-28DOI: 10.1016/j.mseb.2026.119257
Sung Jun Park , Woo Tae Hong , Hyun Kyoung Yang
Mn4+ doped Sr2CaWO6 phosphors with different Mn4+ ion concentration (0.1, 0.3, 0.5, 0.7, 1.0, and 3.0 mol%) were synthesized using solid-state reaction method. The structure, composition, morphology, and photoluminescence of Sr2CaWO6:Mn4+ phosphors were investigated in this experiment. The Sr2CaWO6:Mn4+ phosphors have a well-crystallized structure. The particle size of Sr2CaWO6:Mn4+ phosphors is about several micrometers. The band gap value for Sr2CaWO6:Mn4+ phosphors is 3.70 eV. Sr2CaWO6:Mn4+ phosphors showed a deep red emission centered at 687 nm under excitation at 320 nm. The optimal doping concentration of Sr2CaWO6:Mn4+ phosphors was found to be 0.7 mol%. The prepared phosphors were employed for fingerprint visualization on several substrates (stainless steel, glass, plastic card, and currency), resulting in improved resolution of the fingerprint patterns. The detailed patterns of fingerprint with different levels (1–3) can be clearly observed. These results show that Sr2CaWO6:Mn4+ phosphors have promising applications for latent fingerprint detection.
{"title":"Mn4+-doped Sr2CaWO6 red phosphors for enhanced forensic fingerprint analysis","authors":"Sung Jun Park , Woo Tae Hong , Hyun Kyoung Yang","doi":"10.1016/j.mseb.2026.119257","DOIUrl":"10.1016/j.mseb.2026.119257","url":null,"abstract":"<div><div>Mn<sup>4+</sup> doped Sr<sub>2</sub>CaWO<sub>6</sub> phosphors with different Mn<sup>4+</sup> ion concentration (0.1, 0.3, 0.5, 0.7, 1.0, and 3.0 mol%) were synthesized using solid-state reaction method. The structure, composition, morphology, and photoluminescence of Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors were investigated in this experiment. The Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors have a well-crystallized structure. The particle size of Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors is about several micrometers. The band gap value for Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors is 3.70 eV. Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors showed a deep red emission centered at 687 nm under excitation at 320 nm. The optimal doping concentration of Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors was found to be 0.7 mol%. The prepared phosphors were employed for fingerprint visualization on several substrates (stainless steel, glass, plastic card, and currency), resulting in improved resolution of the fingerprint patterns. The detailed patterns of fingerprint with different levels (1–3) can be clearly observed. These results show that Sr<sub>2</sub>CaWO<sub>6</sub>:Mn<sup>4+</sup> phosphors have promising applications for latent fingerprint detection.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119257"},"PeriodicalIF":4.6,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080932","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}
Tailoring porosity in electrocatalysts is an effective strategy for enhancing the hydrogen evolution reaction (HER) by increasing the active surface area and improving charge transport. In this study, three-dimensional (3D) porous NiP electrodes were fabricated via a simple electrodeposition process using varying concentrations of the (NH4)2SO4 additive and different deposition current densities to control surface morphology and porosity. The results demonstrate that the (NH4)2SO4 plays a crucial role in regulating the porous architecture of NiP deposits. An optimal additive concentration of 0.5 M yields a high-density porous network that expose abundant active sites and facilitates charge transfer kinetics. The optimized Ni-PA0.50-j400 electrode exhibits excellent HER activity in 1 M KOH, requiring an overpotential of only −105 mV to achieve a current density of −10 mA.cm−2, with a Tafel slope of 79 mV.dec−1. Moreover, increasing the deposition current density further enhances catalytic performance by reducing pore sizes and enlarging the electrochemically active surface area (ECSA). The Ni-PA0.50-j600 electrode, characterized by an average pore size of 16.85 μm, achieves −10 mA.cm−2 at an overpotential of −71 mV and demonstrates excellent long-term stability over 30 h. This work provides clear insight into the synergistic effects of additive concentration and current density in tailoring NiP porosity, highlighting the intrinsic relationship between pore architecture and catalytic efficiency for high-performance HER electrocatalysts.
{"title":"Synergistic effects of additive and current density on the 3D porous architecture of electrodeposited NiP electrode for enhanced hydrogen evolution reaction","authors":"Nada Boumazza , Yazid Messaoudi , Wissem Boughouiche , Hamza Belhadj , Pauline Haraux , Abdelkrim Redjaimia , Mohamed R. Khelladi , Amor Azizi","doi":"10.1016/j.mseb.2026.119234","DOIUrl":"10.1016/j.mseb.2026.119234","url":null,"abstract":"<div><div>Tailoring porosity in electrocatalysts is an effective strategy for enhancing the hydrogen evolution reaction (HER) by increasing the active surface area and improving charge transport. In this study, three-dimensional (3D) porous Ni<img>P electrodes were fabricated via a simple electrodeposition process using varying concentrations of the (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> additive and different deposition current densities to control surface morphology and porosity. The results demonstrate that the (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> plays a crucial role in regulating the porous architecture of Ni<img>P deposits. An optimal additive concentration of 0.5 M yields a high-density porous network that expose abundant active sites and facilitates charge transfer kinetics. The optimized Ni-P<sub>A0.50-j400</sub> electrode exhibits excellent HER activity in 1 M KOH, requiring an overpotential of only −105 mV to achieve a current density of −10 mA.cm<sup>−2</sup>, with a Tafel slope of 79 mV.dec<sup>−1</sup>. Moreover, increasing the deposition current density further enhances catalytic performance by reducing pore sizes and enlarging the electrochemically active surface area (ECSA). The Ni-P<sub>A0.50-j600</sub> electrode, characterized by an average pore size of 16.85 μm, achieves −10 mA.cm<sup>−2</sup> at an overpotential of −71 mV and demonstrates excellent long-term stability over 30 h. This work provides clear insight into the synergistic effects of additive concentration and current density in tailoring Ni<img>P porosity, highlighting the intrinsic relationship between pore architecture and catalytic efficiency for high-performance HER electrocatalysts.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119234"},"PeriodicalIF":4.6,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080268","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}
Pub Date : 2026-01-27DOI: 10.1016/j.mseb.2026.119237
Wided Salah , Vicente Montes , Francisco J. López-Tenllado , Maria Carmen Herrera-Beurnio , Wahid Djeridi , Leila Elsellami
Pharmaceutical residues are among the most persistent contaminants in aquatic environments, demanding advanced yet sustainable treatment solutions. This study introduces a solar-driven photocatalytic process that not only degrades acetaminophen efficiently but also selectively converts it into a stable and valuable hydroxylated intermediate, 3-hydroxyacetaminophen (3-HAP). Fe- and Zn-doped TiO₂ photocatalysts (5 wt%) were synthesized via the sol–gel method, characterized using XRD, DRS, and SEM-EDS, and evaluated under solar irradiation to simulate realistic water treatment conditions. High-performance liquid chromatography confirmed 3-HAP as the main transformation product, generated exclusively through hydroxyl radical (•OH) oxidation. The selectivity strongly depends on photocatalyst composition and pH: TiO₂–Fe achieved 83% selectivity at pH 9, while TiO₂–Zn reached 59% at neutral pH. Beyond pollutant removal, this intermediate exhibits structural stability and redox functionality, making it a promising active molecule for the design of electrochemical probes and biosensors related to oxidative stress detection. These results highlight a sustainable and circular approach to pharmaceutical wastewater remediation, where solar photocatalysis enables both environmental purification and the generation of value-added functional molecules opening new perspectives in green water process engineering.
{"title":"Engineering Fe/Zn-doped TiO₂ semiconductors for solar driven selective conversion of acetaminophen into a functional bioactive intermediate","authors":"Wided Salah , Vicente Montes , Francisco J. López-Tenllado , Maria Carmen Herrera-Beurnio , Wahid Djeridi , Leila Elsellami","doi":"10.1016/j.mseb.2026.119237","DOIUrl":"10.1016/j.mseb.2026.119237","url":null,"abstract":"<div><div>Pharmaceutical residues are among the most persistent contaminants in aquatic environments, demanding advanced yet sustainable treatment solutions. This study introduces a solar-driven photocatalytic process that not only degrades acetaminophen efficiently but also selectively converts it into a stable and valuable hydroxylated intermediate, 3-hydroxyacetaminophen (3-HAP). Fe- and Zn-doped TiO₂ photocatalysts (5 wt%) were synthesized via the sol–gel method, characterized using XRD, DRS, and SEM-EDS, and evaluated under solar irradiation to simulate realistic water treatment conditions. High-performance liquid chromatography confirmed 3-HAP as the main transformation product, generated exclusively through hydroxyl radical (<sup>•</sup>OH) oxidation. The selectivity strongly depends on photocatalyst composition and pH: TiO₂–Fe achieved 83% selectivity at pH 9, while TiO₂–Zn reached 59% at neutral pH. Beyond pollutant removal, this intermediate exhibits structural stability and redox functionality, making it a promising active molecule for the design of electrochemical probes and biosensors related to oxidative stress detection. These results highlight a sustainable and circular approach to pharmaceutical wastewater remediation, where solar photocatalysis enables both environmental purification and the generation of value-added functional molecules opening new perspectives in green water process engineering.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119237"},"PeriodicalIF":4.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080931","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}
Pub Date : 2026-01-27DOI: 10.1016/j.mseb.2026.119220
Ruiling Hu , Lingping Jiang , Yaxin Wang , Aoxing Zhao , Min Zhao , Congrong Wang , Miao Zhang , Lei Yang , Wanbing Gong , Jianguo Lv
Rational design and construction of inexpensive and efficient bi-functional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are crucial for overall water splitting (OWS). In this study, bifunctional electrocatalyst Pt-Fe2O3/FeO/NF-0.01 (Pt-Fe/NF-0.01) was prepared via the two-step electrodeposition method. The stacking of interlaced nanosheetson as well as Pt modification can increase the active sites and expose them, transfer matter and charge as well as reduce adsorption energy of different intermediates, thus enhancing HER and OER of Pt-Fe/NF-0.01, which just needs 122 and 172 mV to attain 100 mA cm−2 in 1 M KOH solution. The assembled cell using Pt-Fe/NF-0.01 both as cathode and anode can achieve 10 and 100 mA cm−2 at low voltage of 1.41 and 1.56 V, much lower than those of Pt/C//IrO2:RuO2 (1.54 @10 mA cm−2 and 1.77 @100 mA cm−2). The electric potential decay of the Pt-Fe/NF-0.01/ Pt-Fe/NF-0.01 cell can be ignored after continuous reaction at 100 mA cm−2 for 48 h. This study points out the direction for constructing inexpensive and efficient bi-functional electrocatalysts for OWS devices.
合理设计和构建廉价高效的析氢反应和析氧反应双功能电催化剂是实现整体水分解的关键。本研究采用两步电沉积法制备了双功能电催化剂Pt-Fe2O3/FeO/NF-0.01 （Pt-Fe/NF-0.01）。交错纳米薄片的叠加和Pt修饰可以增加活性位点并使其暴露，转移物质和电荷，降低不同中间体的吸附能，从而提高Pt- fe /NF-0.01的HER和OER，在1 M KOH溶液中仅需122和172 mV即可达到100 mA cm - 2。以Pt- fe /NF-0.01为正极和负极的组装电池在1.41和1.56 V的低电压下可达到10和100 mA cm - 2，远低于Pt/C//IrO2:RuO2 （1.54 @10 mA cm - 2和1.77 @100 mA cm - 2）。在100 mA cm−2条件下连续反应48 h后，Pt-Fe/NF-0.01/ Pt-Fe/NF-0.01电池的电势衰减可以忽略不计。本研究为构建廉价高效的OWS器件双功能电催化剂指明了方向。
{"title":"Dual modification of Fe/nickel foam by interface engineering and low-loading Pt for enhanced overall water splitting","authors":"Ruiling Hu , Lingping Jiang , Yaxin Wang , Aoxing Zhao , Min Zhao , Congrong Wang , Miao Zhang , Lei Yang , Wanbing Gong , Jianguo Lv","doi":"10.1016/j.mseb.2026.119220","DOIUrl":"10.1016/j.mseb.2026.119220","url":null,"abstract":"<div><div>Rational design and construction of inexpensive and efficient bi-functional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are crucial for overall water splitting (OWS). In this study, bifunctional electrocatalyst Pt-Fe<sub>2</sub>O<sub>3</sub>/FeO/NF-0.01 (Pt-Fe/NF-0.01) was prepared via the two-step electrodeposition method. The stacking of interlaced nanosheetson as well as Pt modification can increase the active sites and expose them, transfer matter and charge as well as reduce adsorption energy of different intermediates, thus enhancing HER and OER of Pt-Fe/NF-0.01, which just needs 122 and 172 mV to attain 100 mA cm<sup>−2</sup> in 1 M KOH solution. The assembled cell using Pt-Fe/NF-0.01 both as cathode and anode can achieve 10 and 100 mA cm<sup>−2</sup> at low voltage of 1.41 and 1.56 V, much lower than those of Pt/C//IrO<sub>2</sub>:RuO<sub>2</sub> (1.54 @10 mA cm<sup>−2</sup> and 1.77 @100 mA cm<sup>−2</sup>). The electric potential decay of the Pt-Fe/NF-0.01/ Pt-Fe/NF-0.01 cell can be ignored after continuous reaction at 100 mA cm<sup>−2</sup> for 48 h. This study points out the direction for constructing inexpensive and efficient bi-functional electrocatalysts for OWS devices.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119220"},"PeriodicalIF":4.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080265","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}
Pub Date : 2026-01-27DOI: 10.1016/j.mseb.2026.119236
Yuncheng Li, Jian Wang
Light-metal perovskite hydrides have received significant attention as hydrogen storage materials due to their high capacity for storing hydrogen. Using first-principles calculations, we systematically investigated the structural, hydrogen storage, mechanical, electronic, and optical properties of double perovskite hydrides K2LiXH6 (X = Si, Ge, Sn). The gravimetric hydrogen storage capacities are 5.04 wt%, 3.68 wt%, and 2.86 wt%, respectively, with K2LiSnH6 exhibiting a desorption temperature (344.70 K) close to the U.S. Department of Energy (DOE) 2025 target. All compounds are metallic, brittle, anisotropic, and thermodynamically stable. High ultraviolet absorption coefficients (>104 cm−1) suggest potential light-assisted hydrogen release. This work systematically characterizes the structure-performance relationships of group-IV substituted K2LiXH6, offering theoretical guidance for the design of novel hydrogen storage materials.
{"title":"Exploring the structural stability, hydrogen storage capacity, electronic and optical properties of K2LiXH6 (X = Si, Ge, Sn) hydrides: A first-principles study","authors":"Yuncheng Li, Jian Wang","doi":"10.1016/j.mseb.2026.119236","DOIUrl":"10.1016/j.mseb.2026.119236","url":null,"abstract":"<div><div>Light-metal perovskite hydrides have received significant attention as hydrogen storage materials due to their high capacity for storing hydrogen. Using first-principles calculations, we systematically investigated the structural, hydrogen storage, mechanical, electronic, and optical properties of double perovskite hydrides K<sub>2</sub>LiXH<sub>6</sub> (X = Si, Ge, Sn). The gravimetric hydrogen storage capacities are 5.04 wt%, 3.68 wt%, and 2.86 wt%, respectively, with K<sub>2</sub>LiSnH<sub>6</sub> exhibiting a desorption temperature (344.70 K) close to the U.S. Department of Energy (DOE) 2025 target. All compounds are metallic, brittle, anisotropic, and thermodynamically stable. High ultraviolet absorption coefficients (>10<sup>4</sup> cm<sup>−1</sup>) suggest potential light-assisted hydrogen release. This work systematically characterizes the structure-performance relationships of group-IV substituted K<sub>2</sub>LiXH<sub>6</sub>, offering theoretical guidance for the design of novel hydrogen storage materials.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119236"},"PeriodicalIF":4.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080272","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}
Pub Date : 2026-01-24DOI: 10.1016/j.mseb.2026.119232
Tianyuan Xiao , Xinyue Dong , Nan Yang , Yanming Zhang , Xiaoya Ding , Guangming Yin
To address the increasingly serious problem of antibiotic contamination, the hydrothermal method was employed to synthesize In2O3/α-Bi2O3 photocatalysts. For tetracycline (TC) in aqueous solution, its photocatalytic degradation efficiency driven by visible light was systematically evaluated. The physical structure, optical properties and charge transfer of the composite materials were characterized and analyzed by XRD, PL and EIS. Nanoparticles In2O3 was uniformly loaded on spindle-shaped α-Bi2O3, and the specific surface area increased to 17.08 m2/g. The composite material demonstrated a strong TC photodegradation ability, with a degradation efficiency of 86.99% (catalyst dosage = 30 mg, pH = 6, and initial TC concentration = 5 mg·L−1). The experimental results show that its excellent performance is attributed to the formation of heterojunctions, which have improved visible light absorption and efficient charge transfer. Free radical scavenger studies have confirmed that ·O₂− and h+ generated by photocatalysts account for the efficient degradation of TC, thus laying a foundation for the practical application of photocatalysts. This study innovatively constructs an In2O3/α-Bi2O3 heterojunction with tailored loading ratio, which not only extends the visible-light response range but also promotes directional charge transfer, thus achieving superior photocatalytic degradation of tetracycline.
{"title":"Synthesis of In2O3/α-Bi2O3 heterojunction composites for photocatalytic degradation of tetracycline","authors":"Tianyuan Xiao , Xinyue Dong , Nan Yang , Yanming Zhang , Xiaoya Ding , Guangming Yin","doi":"10.1016/j.mseb.2026.119232","DOIUrl":"10.1016/j.mseb.2026.119232","url":null,"abstract":"<div><div>To address the increasingly serious problem of antibiotic contamination, the hydrothermal method was employed to synthesize In<sub>2</sub>O<sub>3</sub>/α-Bi<sub>2</sub>O<sub>3</sub> photocatalysts. For tetracycline (TC) in aqueous solution, its photocatalytic degradation efficiency driven by visible light was systematically evaluated. The physical structure, optical properties and charge transfer of the composite materials were characterized and analyzed by XRD, PL and EIS. Nanoparticles In<sub>2</sub>O<sub>3</sub> was uniformly loaded on spindle-shaped α-Bi<sub>2</sub>O<sub>3</sub>, and the specific surface area increased to 17.08 m<sup>2</sup>/g. The composite material demonstrated a strong TC photodegradation ability, with a degradation efficiency of 86.99% (catalyst dosage = 30 mg, pH = 6, and initial TC concentration = 5 mg·L<sup>−1</sup>). The experimental results show that its excellent performance is attributed to the formation of heterojunctions, which have improved visible light absorption and efficient charge transfer. Free radical scavenger studies have confirmed that ·O₂<sup>−</sup> and h<sup>+</sup> generated by photocatalysts account for the efficient degradation of TC, thus laying a foundation for the practical application of photocatalysts. This study innovatively constructs an In<sub>2</sub>O<sub>3</sub>/α-Bi<sub>2</sub>O<sub>3</sub> heterojunction with tailored loading ratio, which not only extends the visible-light response range but also promotes directional charge transfer, thus achieving superior photocatalytic degradation of tetracycline.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119232"},"PeriodicalIF":4.6,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080928","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}
Pub Date : 2026-01-24DOI: 10.1016/j.mseb.2026.119230
Kar Kien Ong , Yongqi Zhang , Haiyang Liao , H.K. Jun , Chiam-Wen Liew
Ionogel polymer electrolytes (IGPEs) comprising of poly(acrylic acid) (PAA) /lithium bis(trifluoromethanesulfonyl) imide (LiTFSI)/1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (BmImTFSI) were prepared by solution casting technique. Upon addition of 35 wt% BmImTFSI, PAA-based IGPE exhibits the maximum ionic conductivity of (12.6 ± 0.01) mS/cm at ambient temperature and follows the Arrhenius theory. Incorporation of BmImTFSI into the PAA matrix decreases the glass transition temperature to −7.8 °C, as evidenced by differential scanning calorimetry (DSC) study. XRD showed reduced degree of crystallinity of 47% upon addition of 35 wt% BmImTFSI. Field Emission Scanning Electron Microscopy (FESEM) was performed to study the morphological information of the IGPEs. Upon the incorporation of the ionic liquid into the PAA backbone, there is a slight increase in electrochemical stability window to 3.67 V and an improvement in thermal stability up to 200 °C, as proven by linear sweep voltammetry (LSV) and thermogravimetric analysis (TGA), respectively. FTIR analysis proves the coordination interaction between PAA, LiTFSI and BmImTFSI in the IGPE. An electrical double layer capacitor (EDLC) cell was thus fabricated using the highest conducting IGPE and two identical carbon-based electrodes. The resulting EDLC cell shows better electrochemical performance than that of BmImTFSI-free GPE. Upon the addition of BmImTFSI to the IGPEs, the EDLC shows an increase in specific capacitance to 67 F/g, as illustrated by cyclic voltammetry studies. The results obtained are in good agreement with GCD findings. The fabricated EDLC shows its specific discharge capacitance of 181 F/g, power density of 907 W/kg and energy density of 50 Wh/kg.
{"title":"Unveiling the potential of BmImTFSI-functionalized poly (acrylic acid)-based ionogel polymer electrolyte for electrical double layer capacitor (EDLC) application","authors":"Kar Kien Ong , Yongqi Zhang , Haiyang Liao , H.K. Jun , Chiam-Wen Liew","doi":"10.1016/j.mseb.2026.119230","DOIUrl":"10.1016/j.mseb.2026.119230","url":null,"abstract":"<div><div>Ionogel polymer electrolytes (IGPEs) comprising of poly(acrylic acid) (PAA) /lithium bis(trifluoromethanesulfonyl) imide (LiTFSI)/1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (BmImTFSI) were prepared by solution casting technique. Upon addition of 35 wt% BmImTFSI, PAA-based IGPE exhibits the maximum ionic conductivity of (12.6 ± 0.01) mS/cm at ambient temperature and follows the Arrhenius theory. Incorporation of BmImTFSI into the PAA matrix decreases the glass transition temperature to −7.8 °C, as evidenced by differential scanning calorimetry (DSC) study. XRD showed reduced degree of crystallinity of 47% upon addition of 35 wt% BmImTFSI. Field Emission Scanning Electron Microscopy (FESEM) was performed to study the morphological information of the IGPEs. Upon the incorporation of the ionic liquid into the PAA backbone, there is a slight increase in electrochemical stability window to 3.67 V and an improvement in thermal stability up to 200 °C, as proven by linear sweep voltammetry (LSV) and thermogravimetric analysis (TGA), respectively. FTIR analysis proves the coordination interaction between PAA, LiTFSI and BmImTFSI in the IGPE. An electrical double layer capacitor (EDLC) cell was thus fabricated using the highest conducting IGPE and two identical carbon-based electrodes. The resulting EDLC cell shows better electrochemical performance than that of BmImTFSI-free GPE. Upon the addition of BmImTFSI to the IGPEs, the EDLC shows an increase in specific capacitance to 67 F/g, as illustrated by cyclic voltammetry studies. The results obtained are in good agreement with GCD findings. The fabricated EDLC shows its specific discharge capacitance of 181 F/g, power density of 907 W/kg and energy density of 50 Wh/kg.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119230"},"PeriodicalIF":4.6,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080933","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}
Pub Date : 2026-01-23DOI: 10.1016/j.mseb.2026.119238
Ahmet Baran , Erdoğan Özel , Esra Evcin-Baydilli , Ahmet Kaymaz , Şemsettin Altındal
In this study, the temperature-dependent dielectric properties of a Cu-doped diamond-like carbon (DLC) interfacial-layered Schottky device (SD), fabricated by the electrochemical deposition method, were systematically investigated in terms of the dominant polarization mechanisms. Impedance measurements, performed over the temperature range of 80–410 K, were used to calculate the dielectric constant (ε'), dielectric loss (ε″), loss tangent (tan(δ)), ac conductivity (σac), and complex electric modulus (M⁎), including its real (M′) and imaginary (M″) components. The results reveal that all dielectric parameters exhibit three distinct behaviours within three temperature regions, namely low-temperature (LTs: 80–170 K), moderate-temperature (MTs: 200–290 K), and high-temperature (HTs: 300–410 K) regimes. This behavior indicates a pronounced sensitivity of the DLC interfacial layer to temperature. It was also observed that different polarization mechanisms, including dipolar, trapping-related, electronic, and space-charge polarizations, become dominant depending on the temperature and applied voltage range. Owing to the heterogeneous structure of the SD, the contribution of Maxwell–Wagner polarization, as a specific form of space-charge polarization, becomes particularly significant in the HTs region. Moreover, Cu doping leads to an increase in carrier density within the DLC layer, enhancing the tunneling probability and strengthening space-charge polarization through the increased availability of free carriers.
{"title":"Comprehensive dielectric analysis of Schottky devices with Cu-doped DLC interlayer: Temperature effects and polarization mechanisms","authors":"Ahmet Baran , Erdoğan Özel , Esra Evcin-Baydilli , Ahmet Kaymaz , Şemsettin Altındal","doi":"10.1016/j.mseb.2026.119238","DOIUrl":"10.1016/j.mseb.2026.119238","url":null,"abstract":"<div><div>In this study, the temperature-dependent dielectric properties of a Cu-doped diamond-like carbon (DLC) interfacial-layered Schottky device (SD), fabricated by the electrochemical deposition method, were systematically investigated in terms of the dominant polarization mechanisms. Impedance measurements, performed over the temperature range of 80–410 K, were used to calculate the dielectric constant (<em>ε'</em>), dielectric loss (<em>ε″</em>), loss tangent (<em>tan(δ)</em>), ac conductivity (<em>σ</em><sub><em>ac</em></sub>), and complex electric modulus (<em>M</em><sup><em>⁎</em></sup>), including its real (<em>M′</em>) and imaginary (<em>M″</em>) components. The results reveal that all dielectric parameters exhibit three distinct behaviours within three temperature regions, namely low-temperature (LTs: 80–170 K), moderate-temperature (MTs: 200–290 K), and high-temperature (HTs: 300–410 K) regimes. This behavior indicates a pronounced sensitivity of the DLC interfacial layer to temperature. It was also observed that different polarization mechanisms, including dipolar, trapping-related, electronic, and space-charge polarizations, become dominant depending on the temperature and applied voltage range. Owing to the heterogeneous structure of the SD, the contribution of Maxwell–Wagner polarization, as a specific form of space-charge polarization, becomes particularly significant in the HTs region. Moreover, Cu doping leads to an increase in carrier density within the DLC layer, enhancing the tunneling probability and strengthening space-charge polarization through the increased availability of free carriers.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119238"},"PeriodicalIF":4.6,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037225","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}
Pub Date : 2026-01-23DOI: 10.1016/j.mseb.2026.119239
Inna V. Lisnevskaya, Ivan G. Sheptun, Olga Yu. Grapenko, Dmitry V. Shaforost, Inga A. Aleksandrova, Anait A. Manukyan, Vsevolod A. Burumov, Anton A. Zabolotnyi, Oleg E. Polozhentsev, Svetlana I. Raevskaya
Solid solutions of 0.7BiFeO3 – (0.3-х)BaTiO3 - хPbTiO3 (x = 0–0.3) were synthesized using the solid-state reaction method. It was shown that in the range of x = 0–0.15, they possess a rhombohedrally distorted perovskite structure. Further, at x = 0.2–0.3, phase separation is observed, i.e., a PbTiO3-based perovskite phase with an extremely large tetragonal distortion appears; at x = 0.3, the c/a ratio reaches 1.18. For the phase with rhombohedral distortion, the lattice parameters a and α decrease with increasing x, which is consistent with the ionic radii of the Ba2+ and Pb2+ cations. Throughout the entire x range, the samples exhibit non-zero piezoelectric coefficients d33, as well as typical ferromagnetic behavior. Furthermore, with an increase in lead content, a general deterioration of the piezoelectric and magnetic parameters is observed, which is presumably related to an increase in the ferroelectric hardness of the ceramics and the degree of rhombohedral distortion. This distortion leads to a disruption of the cooperative Fe-O-Fe exchange interactions. The most effective multiferroic properties are demonstrated by the solid solution with x = 0, for which the dielectric constant ε/ε0 = 135, the dielectric loss tangent tan δ = 0.06, the piezoelectric coefficient d33 = 30 pC/N, the saturation magnetization MS = 0.86 emu/g, the remanent magnetization MR = 0.86 emu/g, and the coercive field HC = 2.1 kOe.
{"title":"Multiferroic properties of 0.7BiFeO3 - (0.3-х)BaTiO3 - хPbTiO3 solid solutions","authors":"Inna V. Lisnevskaya, Ivan G. Sheptun, Olga Yu. Grapenko, Dmitry V. Shaforost, Inga A. Aleksandrova, Anait A. Manukyan, Vsevolod A. Burumov, Anton A. Zabolotnyi, Oleg E. Polozhentsev, Svetlana I. Raevskaya","doi":"10.1016/j.mseb.2026.119239","DOIUrl":"10.1016/j.mseb.2026.119239","url":null,"abstract":"<div><div>Solid solutions of 0.7BiFeO<sub>3</sub> – (0.3-<em>х</em>)BaTiO<sub>3</sub> - <em>х</em>PbTiO<sub>3</sub> (<em>x</em> = 0–0.3) were synthesized using the solid-state reaction method. It was shown that in the range of <em>x</em> = 0–0.15, they possess a rhombohedrally distorted perovskite structure. Further, at <em>x</em> = 0.2–0.3, phase separation is observed, i.e., a PbTiO<sub>3</sub>-based perovskite phase with an extremely large tetragonal distortion appears; at <em>x</em> = 0.3, the <em>c</em>/<em>a</em> ratio reaches 1.18. For the phase with rhombohedral distortion, the lattice parameters <em>a</em> and α decrease with increasing <em>x</em>, which is consistent with the ionic radii of the Ba<sup>2+</sup> and Pb<sup>2+</sup> cations. Throughout the entire <em>x</em> range, the samples exhibit non-zero piezoelectric coefficients d<sub>33</sub>, as well as typical ferromagnetic behavior. Furthermore, with an increase in lead content, a general deterioration of the piezoelectric and magnetic parameters is observed, which is presumably related to an increase in the ferroelectric hardness of the ceramics and the degree of rhombohedral distortion. This distortion leads to a disruption of the cooperative Fe-O-Fe exchange interactions. The most effective multiferroic properties are demonstrated by the solid solution with <em>x</em> = 0, for which the dielectric constant ε/ε<sub>0</sub> = 135, the dielectric loss tangent tan δ = 0.06, the piezoelectric coefficient d<sub>33</sub> = 30 pC/N, the saturation magnetization M<sub>S</sub> = 0.86 emu/g, the remanent magnetization M<sub>R</sub> = 0.86 emu/g, and the coercive field H<sub>C</sub> = 2.1 kOe.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119239"},"PeriodicalIF":4.6,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037218","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}
Pub Date : 2026-01-22DOI: 10.1016/j.mseb.2026.119214
Mateus Veras Pereira , Wilfredo Fernando Roque Villanueva , Evandro Datti , Wilson S. Fernandes-Junior , Bruno Campos Janegitz , Juliano Alves Bonacin
In recent years, antibiotics and other pharmaceutical compounds have been identified as emerging contaminants in aquatic ecosystems. Therefore, the detection of antibiotics in wastewater and other water bodies is crucial for monitoring the extent of contamination, assessing their potential impacts on human and environmental health, and developing effective strategies for their removal and control. In this study, we exploited additive manufacturing to design and fabricate an electroanalytical device (electrodes and electrochemical cell, using a polymeric matrix of polylactic acid and acrylonitrile-butadiene-styrene, respectively) for detecting sulfamethoxazole (SMX) in real water samples. The 3D-printed working electrode underwent an activation process. After activation, characterization using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) revealed that the surface underwent modification, becoming more irregular and rougher, which contributed to better electrochemical activity. The electrochemical cell was applied to the detection of SMX, in a linear range of 0.5–50 μmol L−1. A good linear correlation was observed between the peak current and SMX concentration, as evidenced by the R2 value of 0.998, which confirmed a good fit of the data obtained. Furthermore, the limits of detection and quantification were 0.16 and 0.54 μmol L−1, respectively. The electrochemical system was applied to detect SMX in real water samples using square wave voltammetry (SWV) with the addition and recovery method. The recovery values obtained were 80.0 to 106%, indicating that the developed electrochemical system presented a satisfactory application for SMX detection. Therefore, the proposed electrochemical cell is an efficient alternative for antibiotic detection.
{"title":"3D-printed electrodes and electrochemical cell for sulfamethoxazole quantification","authors":"Mateus Veras Pereira , Wilfredo Fernando Roque Villanueva , Evandro Datti , Wilson S. Fernandes-Junior , Bruno Campos Janegitz , Juliano Alves Bonacin","doi":"10.1016/j.mseb.2026.119214","DOIUrl":"10.1016/j.mseb.2026.119214","url":null,"abstract":"<div><div>In recent years, antibiotics and other pharmaceutical compounds have been identified as emerging contaminants in aquatic ecosystems. Therefore, the detection of antibiotics in wastewater and other water bodies is crucial for monitoring the extent of contamination, assessing their potential impacts on human and environmental health, and developing effective strategies for their removal and control. In this study, we exploited additive manufacturing to design and fabricate an electroanalytical device (electrodes and electrochemical cell, using a polymeric matrix of polylactic acid and acrylonitrile-butadiene-styrene, respectively) for detecting sulfamethoxazole (SMX) in real water samples. The 3D-printed working electrode underwent an activation process. After activation, characterization using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) revealed that the surface underwent modification, becoming more irregular and rougher, which contributed to better electrochemical activity. The electrochemical cell was applied to the detection of SMX, in a linear range of 0.5–50 μmol L<sup>−1</sup>. A good linear correlation was observed between the peak current and SMX concentration, as evidenced by the R<sup>2</sup> value of 0.998, which confirmed a good fit of the data obtained. Furthermore, the limits of detection and quantification were 0.16 and 0.54 μmol L<sup>−1</sup>, respectively. The electrochemical system was applied to detect SMX in real water samples using square wave voltammetry (SWV) with the addition and recovery method. The recovery values obtained were 80.0 to 106%, indicating that the developed electrochemical system presented a satisfactory application for SMX detection. Therefore, the proposed electrochemical cell is an efficient alternative for antibiotic detection.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"327 ","pages":"Article 119214"},"PeriodicalIF":4.6,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037221","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}
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