Pub Date : 2026-01-01DOI: 10.1016/j.jssc.2026.125808
Masanori Kodera, Kazuhiro Sayama
Oxynitrides, such as TaON, have received considerable attention owing to their mixed-anion characteristics. The nitridation of Ta2O5 to TaON was investigated in detail to experimentally determine the optimal nitridation conditions. The change in mass before and after nitridation, which serves as an indicator of the degree of the nitridation reaction, was successfully analyzed using four variables: nitridation temperature, nitridation time, ammonia flow rate, and precursor mass. Furthermore, machine learning models accurately predicted the degree of nitridation. The obtained results provide valuable insights for understanding and controlling the nitridation process, which is important for oxynitride research. In addition, the findings suggest that the combination of experiments and machine-learning methodologies is a powerful tool in material science.
{"title":"Experimental and machine learning-assisted prediction of nitridation of Ta2O5 to TaON","authors":"Masanori Kodera, Kazuhiro Sayama","doi":"10.1016/j.jssc.2026.125808","DOIUrl":"10.1016/j.jssc.2026.125808","url":null,"abstract":"<div><div>Oxynitrides, such as TaON, have received considerable attention owing to their mixed-anion characteristics. The nitridation of Ta<sub>2</sub>O<sub>5</sub> to TaON was investigated in detail to experimentally determine the optimal nitridation conditions. The change in mass before and after nitridation, which serves as an indicator of the degree of the nitridation reaction, was successfully analyzed using four variables: nitridation temperature, nitridation time, ammonia flow rate, and precursor mass. Furthermore, machine learning models accurately predicted the degree of nitridation. The obtained results provide valuable insights for understanding and controlling the nitridation process, which is important for oxynitride research. In addition, the findings suggest that the combination of experiments and machine-learning methodologies is a powerful tool in material science.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"356 ","pages":"Article 125808"},"PeriodicalIF":3.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.jssc.2026.125807
Zhanglong Tang , Xin Chen , Huadong Mei , Liang Wang , Shuang Wang , Yatian Huang , Mingjun Luo , Xingbo Ge
The development of efficient, stable, and low-cost non-precious metal electrocatalysts is pivotal for advancing water electrolysis for hydrogen production, where the oxygen evolution reaction (OER) remains the kinetic bottleneck. Herein, we report a self-supported S–NiCoFe(OH)x/NF electrode with Fe incorporation and S modification. The results reveal that the incorporation of Fe significantly boosts the intrinsic catalytic activity of the material, while the modification of S further enhances charge transfer efficiency and accelerates reaction kinetics. Electrochemical tests demonstrated that the S–NiCoFe(OH)x/NF electrode exhibited outstanding OER performance in 1.0 M KOH, requiring an overpotential of only 283 mV to achieve a current density of 100 mA cm−2, with a Tafel slope of 36.2 mV·dec−1. X-ray photoelectron spectroscopy (XPS) depth profiling confirms a gradient distribution of Fe and S from the surface to the bulk phase of the composite: Fe content increases from the surface to the bulk, whereas S is primarily enriched on the surface. This synergistic regulation of elemental composition and spatial distribution not only resolves the trade-off between activity and conductivity but also provides a versatile design principle for the development of high-performance hydroxide-based electrocatalysts toward practical water electrolysis.
高效、稳定、低成本的非贵金属电催化剂的开发是推进电解制氢的关键，而析氧反应（OER）仍然是电解制氢的动力学瓶颈。在此，我们报道了一种带有铁掺杂和S修饰的自支撑S - nicofe (OH)x/NF电极。结果表明，Fe的掺入显著提高了材料的本征催化活性，而S的改性进一步提高了材料的电荷传递效率，加速了反应动力学。电化学测试表明，S-NiCoFe (OH)x/NF电极在1.0 M KOH条件下表现出优异的OER性能，仅需283 mV过电位即可达到100 mA cm−2的电流密度，Tafel斜率为36.2 mV·dec−1。x射线光电子能谱（XPS）深度剖面证实了Fe和S从复合材料表面到体相的梯度分布：Fe含量从表面到体相增加，而S主要富集在表面。这种元素组成和空间分布的协同调节不仅解决了活性和导电性之间的权衡，而且为开发用于实际水电解的高性能氢氧化物电催化剂提供了一种通用的设计原则。
{"title":"Iron incorporation and sulfur modification synergistically enhance oxygen evolution in nickel–cobalt hydroxide electrocatalysts","authors":"Zhanglong Tang , Xin Chen , Huadong Mei , Liang Wang , Shuang Wang , Yatian Huang , Mingjun Luo , Xingbo Ge","doi":"10.1016/j.jssc.2026.125807","DOIUrl":"10.1016/j.jssc.2026.125807","url":null,"abstract":"<div><div>The development of efficient, stable, and low-cost non-precious metal electrocatalysts is pivotal for advancing water electrolysis for hydrogen production, where the oxygen evolution reaction (OER) remains the kinetic bottleneck. Herein, we report a self-supported S–NiCoFe(OH)<sub>x</sub>/NF electrode with Fe incorporation and S modification. The results reveal that the incorporation of Fe significantly boosts the intrinsic catalytic activity of the material, while the modification of S further enhances charge transfer efficiency and accelerates reaction kinetics. Electrochemical tests demonstrated that the S–NiCoFe(OH)<sub>x</sub>/NF electrode exhibited outstanding OER performance in 1.0 M KOH, requiring an overpotential of only 283 mV to achieve a current density of 100 mA cm<sup>−2</sup>, with a Tafel slope of 36.2 mV·dec<sup>−1</sup>. X-ray photoelectron spectroscopy (XPS) depth profiling confirms a gradient distribution of Fe and S from the surface to the bulk phase of the composite: Fe content increases from the surface to the bulk, whereas S is primarily enriched on the surface. This synergistic regulation of elemental composition and spatial distribution not only resolves the trade-off between activity and conductivity but also provides a versatile design principle for the development of high-performance hydroxide-based electrocatalysts toward practical water electrolysis.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"356 ","pages":"Article 125807"},"PeriodicalIF":3.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145876901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.jssc.2026.125805
Jintao Xie , Junpeng Li , Yujia Xu , Zhouyan Li , Yuting Li , Mincheng Jiang , Jun Zhang , Jing Zhu
Inorganic phosphors activated by Er3+ activators have hold great attention owing to unique up/down-conversion luminescence. In this work, a series of Er3+-activated whitlockite-type Sr9Y(PO4)7 (SYPO) phosphate phosphors were developed by soli-state reaction. Er3+ activators are solidly dissolved into the SYPO host through occupying the Y3+ crystalline sites. The optimal doping concentration for achieving maximum up-conversion luminescence from Er3+ is 0.03 mol. The Er3+ concentration quenching comes from electric dipole-quadrupole interaction. Excited by a 980 nm laser, the intensity of the red- and green-emitting components varies distinctly with the Er3+ concentration, producing tunable emission colors from green to orange-red. Furthermore, the up-conversion emission mechanism is investigated and elucidated. The findings offer valuable insight on the luminescence behavior of Er3+ in whitlockite-type phosphate hosts.
{"title":"Concentration-dependent up-conversion luminescence of whitlockite-type phosphor Sr9Y(PO4)7:Er3+","authors":"Jintao Xie , Junpeng Li , Yujia Xu , Zhouyan Li , Yuting Li , Mincheng Jiang , Jun Zhang , Jing Zhu","doi":"10.1016/j.jssc.2026.125805","DOIUrl":"10.1016/j.jssc.2026.125805","url":null,"abstract":"<div><div>Inorganic phosphors activated by Er<sup>3+</sup> activators have hold great attention owing to unique up/down-conversion luminescence. In this work, a series of Er<sup>3+</sup>-activated whitlockite-type Sr<sub>9</sub>Y(PO<sub>4</sub>)<sub>7</sub> (SYPO) phosphate phosphors were developed by soli-state reaction. Er<sup>3+</sup> activators are solidly dissolved into the SYPO host through occupying the Y<sup>3+</sup> crystalline sites. The optimal doping concentration for achieving maximum up-conversion luminescence from Er<sup>3+</sup> is 0.03 mol. The Er<sup>3+</sup> concentration quenching comes from electric dipole-quadrupole interaction. Excited by a 980 nm laser, the intensity of the red- and green-emitting components varies distinctly with the Er<sup>3+</sup> concentration, producing tunable emission colors from green to orange-red. Furthermore, the up-conversion emission mechanism is investigated and elucidated. The findings offer valuable insight on the luminescence behavior of Er<sup>3+</sup> in whitlockite-type phosphate hosts.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125805"},"PeriodicalIF":3.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01DOI: 10.1016/j.jssc.2026.125806
Shiji Elizabeth , Jagadeesh Mohanan , Subodh Ganesanpotti , Bindu P. Nair
Herein, we report a template free synthesis of amino and vinyl functionalized hollow silica spheres (HSS) in green solvents through self-assembly. Amino- and vinyl-functionalized HSS were synthesized via a hydrolytic co-condensation of 3-aminopropyltriethoxysilane and vinyltriethoxysilane in alcohol-water mixture, followed by a self-assembly induced phase separation using water. HSS had an average diameter of 918 nm, as confirmed by SEM. TEM and fluorescence microscopy further verified the hollow structure of the spheres. XRD indicated its amorphous nature, while FT-IR confirmed functionalization. HSS exhibited high stability in PBS at pH 7.4 for up to 28 days. Rhodamine B encapsulated in HSS demonstrated a sustained, diffusion-limited release behavior in PBS, with a cumulative release of only 27.6 % over 28 days. Polyvinylidene fluoride (PVDF) composites incorporating HSS exhibited a reduced relative permittivity due to hollow structure of HSS. At a loading of 0.32 vol fraction of HSS, the relative permittivity of the composite measured 2.5 at 100 MHz, compared to 3.2 for pure PVDF. Additionally, HSS were employed as templates for synthesizing iron oxide-incorporated silica composites via an in situ incorporation method. The resulting Fe3O4–silica composites displayed superparamagnetic behavior, attributed to the uniform nanoscale dispersion of Fe3O4 within the HSS.
{"title":"Amino- and vinyl-functionalized hollow silica spheres via self-assembly of organosilanes","authors":"Shiji Elizabeth , Jagadeesh Mohanan , Subodh Ganesanpotti , Bindu P. Nair","doi":"10.1016/j.jssc.2026.125806","DOIUrl":"10.1016/j.jssc.2026.125806","url":null,"abstract":"<div><div>Herein, we report a template free synthesis of amino and vinyl functionalized hollow silica spheres (HSS) in green solvents through self-assembly. Amino- and vinyl-functionalized HSS were synthesized via a hydrolytic co-condensation of 3-aminopropyltriethoxysilane and vinyltriethoxysilane in alcohol-water mixture, followed by a self-assembly induced phase separation using water. HSS had an average diameter of 918 nm, as confirmed by SEM. TEM and fluorescence microscopy further verified the hollow structure of the spheres. XRD indicated its amorphous nature, while FT-IR confirmed functionalization. HSS exhibited high stability in PBS at pH 7.4 for up to 28 days. Rhodamine B encapsulated in HSS demonstrated a sustained, diffusion-limited release behavior in PBS, with a cumulative release of only 27.6 % over 28 days. Polyvinylidene fluoride (PVDF) composites incorporating HSS exhibited a reduced relative permittivity due to hollow structure of HSS. At a loading of 0.32 vol fraction of HSS, the relative permittivity of the composite measured 2.5 at 100 MHz, compared to 3.2 for pure PVDF. Additionally, HSS were employed as templates for synthesizing iron oxide-incorporated silica composites via an in situ incorporation method. The resulting Fe<sub>3</sub>O<sub>4</sub>–silica composites displayed superparamagnetic behavior, attributed to the uniform nanoscale dispersion of Fe<sub>3</sub>O<sub>4</sub> within the HSS.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"356 ","pages":"Article 125806"},"PeriodicalIF":3.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-31DOI: 10.1016/j.jssc.2025.125804
L.D. Solis-Salazar , K. Pineda-Urbina , I.A. Aguayo-Villarreal , C.K. Rojas-Mayorga , R. Muñiz-Valencia , N.E. Davila Guzman , A. Bonilla-Petriciolet
Fluoride contamination in drinking water is a major global health concern, particularly in developing regions where excessive exposure can lead to dental and skeletal fluorosis. Although several treatment methods exist, however, a critical need remains for efficient, low-cost, and scalable fluoride adsorbents. Metal-organic frameworks (MOFs), especially MIL-100(Fe) and MIL-100(Al), offer great potential due to their high surface area, chemical stability, and tunable porosity. In this study, MIL-100(Fe) and MIL-100(Al) were synthesized using a microwave-assisted method, providing a rapid and effective route to highly porous materials. MIL-100(Al) (81 mg/g), exhibited a fluoride adsorption capacity more than three times that of MIL-100(Fe) (22 mg/g), despite MIL-100(Fe) showing higher adsorption energy. The superior performance of MIL-100(Al) is attributed to its more accessible pore structure, as MIL-100(Fe) suffered from greater pore blockage. Both MOFs followed the Sips isotherm model, and computational analysis revealed that fluoride adsorption is governed by electrostatic interactions and heterogeneous active sites.
{"title":"Microwave-assisted synthesis of MIL-100(Al and Fe) for fluoride remediation: A dual experimental–computational approach","authors":"L.D. Solis-Salazar , K. Pineda-Urbina , I.A. Aguayo-Villarreal , C.K. Rojas-Mayorga , R. Muñiz-Valencia , N.E. Davila Guzman , A. Bonilla-Petriciolet","doi":"10.1016/j.jssc.2025.125804","DOIUrl":"10.1016/j.jssc.2025.125804","url":null,"abstract":"<div><div>Fluoride contamination in drinking water is a major global health concern, particularly in developing regions where excessive exposure can lead to dental and skeletal fluorosis. Although several treatment methods exist, however, a critical need remains for efficient, low-cost, and scalable fluoride adsorbents. Metal-organic frameworks (MOFs), especially MIL-100(Fe) and MIL-100(Al), offer great potential due to their high surface area, chemical stability, and tunable porosity. In this study, MIL-100(Fe) and MIL-100(Al) were synthesized using a microwave-assisted method, providing a rapid and effective route to highly porous materials. MIL-100(Al) (81 mg/g), exhibited a fluoride adsorption capacity more than three times that of MIL-100(Fe) (22 mg/g), despite MIL-100(Fe) showing higher adsorption energy. The superior performance of MIL-100(Al) is attributed to its more accessible pore structure, as MIL-100(Fe) suffered from greater pore blockage. Both MOFs followed the Sips isotherm model, and computational analysis revealed that fluoride adsorption is governed by electrostatic interactions and heterogeneous active sites.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"356 ","pages":"Article 125804"},"PeriodicalIF":3.5,"publicationDate":"2025-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-30DOI: 10.1016/j.jssc.2025.125802
Chang-Qing Lin , Jun-Peng Deng , Zhe-Hui Lu , Zhen-Hua Liang , Yu-Ru Ling , Jun-Xi Liu , Wang Han , Chun-Yang Pan
Cu2+ doped CsPbBr3 PQDs with a PLQY of 91 % were synthesized via a continuous microfluidic approach. The precise regulation of flow rate and reaction temperature enabled fine control over the crystal size and structure. Time-resolved photoluminescence (TRPL) and transient absorption (TA) spectroscopy revealed picosecond-scale carrier recombination dynamics and distinct band-edge bleaching behavior in CsPb0.89Cu0.11Br3 PQDs, confirming the effective defect passivation induced by Cu2+ incorporation. Furthermore, flexible CsPb0.89Cu0.11Br3/PCL composite films exhibited an exceptional light yield of 21340 photons MeV−1 and a low detection limit of 82.5 nGy s−1 under X-ray excitation.
{"title":"Microfluidic synthesis of high-brightness Cu2+ doped CsPbBr3 PQD and its flexible film for X-ray scintillator","authors":"Chang-Qing Lin , Jun-Peng Deng , Zhe-Hui Lu , Zhen-Hua Liang , Yu-Ru Ling , Jun-Xi Liu , Wang Han , Chun-Yang Pan","doi":"10.1016/j.jssc.2025.125802","DOIUrl":"10.1016/j.jssc.2025.125802","url":null,"abstract":"<div><div>Cu<sup>2+</sup> doped CsPbBr<sub>3</sub> PQDs with a PLQY of 91 % were synthesized via a continuous microfluidic approach. The precise regulation of flow rate and reaction temperature enabled fine control over the crystal size and structure. Time-resolved photoluminescence (TRPL) and transient absorption (TA) spectroscopy revealed picosecond-scale carrier recombination dynamics and distinct band-edge bleaching behavior in CsPb<sub>0.89</sub>Cu<sub>0.11</sub>Br<sub>3</sub> PQDs, confirming the effective defect passivation induced by Cu<sup>2+</sup> incorporation. Furthermore, flexible CsPb<sub>0.89</sub>Cu<sub>0.11</sub>Br<sub>3</sub>/PCL composite films exhibited an exceptional light yield of 21340 photons MeV<sup>−1</sup> and a low detection limit of 82.5 nGy s<sup>−1</sup> under X-ray excitation.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125802"},"PeriodicalIF":3.5,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-29DOI: 10.1016/j.jssc.2025.125803
Tian-Jiao Jiang , Yu-Nan Cui , Li Liu , Shibao Tang , Peng-Fei Wang , Yu-Hang Zhang , Gang Yang , Fa-Nian Shi
Metal-organic framework materials (MOFs) are an emerging coordination polymer in recent years, and metal ions can form a three-dimensional porous structure by self-assembly with organic ligands, so MOFs usually have a large specific surface area and good structural controllability. The simple synthesis method makes the preparation of TMOs anode materials by MOF a feasible and promising material development route. In this study, three Fe–Cu-MOF precursors were prepared by solvothermal method, and the nanocomposites of 3Fe2O3/CuO, 5Fe2O3/CuO and 10Fe2O3/CuO were synthesized by calcination of the as-prepared Fe–Cu-MOFs. The CuO layer with incomplete surface encapsulation provides a fast electron/ion transport channel. The experimental results showed that under the optimal doping ratio, the 5Fe2O3/CuO composites showed excellent electrochemical properties, with a reversible capacity at 0.1A/g up to 1417.06 mAh g-1 (after 145 cycles), which was much higher than those of 3Fe2O3/CuO(602.38 mAh g-1)and 10Fe2O3/CuO (987.43 mAh g-1), respectively. Importantly, at a high current density of 1A/g, it can remain at 551.16 mAh g-1 after 800 cycles, effectively alleviating the volume expansion problem of Fe2O3 materials during the charging and discharging process. Fe–Cu-MOF-derived 5Fe2O3/CuO nanocomposites are expected to become ideal for high-performance lithium-ion battery anode materials due to their excellent electrochemical properties and broad application prospects.
金属-有机框架材料（MOFs）是近年来新兴的配位聚合物，金属离子与有机配体自组装形成三维多孔结构，因此MOFs通常具有较大的比表面积和良好的结构可控性。简单的合成方法使MOF制备TMOs负极材料成为一条可行且有前景的材料发展路线。本研究采用溶剂热法制备了3种Fe-Cu-MOF前驱体，并对制备的Fe-Cu-MOF进行煅烧，合成了3Fe2O3/CuO、5Fe2O3/CuO和10Fe2O3/CuO纳米复合材料。表面不完全封装的CuO层提供了一个快速的电子/离子传输通道。实验结果表明，在最佳掺杂比例下，5Fe2O3/CuO复合材料表现出优异的电化学性能，在0.1A/g下可逆容量高达1417.06 mAh g-1（循环145次），远高于3Fe2O3/CuO（602.38 mAh g-1）和10Fe2O3/CuO （987.43 mAh g-1）。重要的是，在1A/g的高电流密度下，800次循环后仍能保持在551.16 mAh g-1，有效缓解了Fe2O3材料在充放电过程中的体积膨胀问题。fe - cu - mof衍生的5Fe2O3/CuO纳米复合材料具有优异的电化学性能和广阔的应用前景，有望成为高性能锂离子电池负极材料的理想选择。
{"title":"MOF-derived Fe2O3/CuO nanocomposites as anode materials for high-performance lithium-ion batteries","authors":"Tian-Jiao Jiang , Yu-Nan Cui , Li Liu , Shibao Tang , Peng-Fei Wang , Yu-Hang Zhang , Gang Yang , Fa-Nian Shi","doi":"10.1016/j.jssc.2025.125803","DOIUrl":"10.1016/j.jssc.2025.125803","url":null,"abstract":"<div><div>Metal-organic framework materials (MOFs) are an emerging coordination polymer in recent years, and metal ions can form a three-dimensional porous structure by self-assembly with organic ligands, so MOFs usually have a large specific surface area and good structural controllability. The simple synthesis method makes the preparation of TMOs anode materials by MOF a feasible and promising material development route. In this study, three Fe–Cu-MOF precursors were prepared by solvothermal method, and the nanocomposites of 3Fe<sub>2</sub>O<sub>3</sub>/CuO, 5Fe<sub>2</sub>O<sub>3</sub>/CuO and 10Fe<sub>2</sub>O<sub>3</sub>/CuO were synthesized by calcination of the as-prepared Fe–Cu-MOFs. The CuO layer with incomplete surface encapsulation provides a fast electron/ion transport channel. The experimental results showed that under the optimal doping ratio, the 5Fe<sub>2</sub>O<sub>3</sub>/CuO composites showed excellent electrochemical properties, with a reversible capacity at 0.1A/g up to 1417.06 mAh g<sup>-1</sup> (after 145 cycles), which was much higher than those of 3Fe<sub>2</sub>O<sub>3</sub>/CuO(602.38 mAh g<sup>-1</sup>)and 10Fe<sub>2</sub>O<sub>3</sub>/CuO (987.43 mAh g<sup>-1</sup>), respectively. Importantly, at a high current density of 1A/g, it can remain at 551.16 mAh g<sup>-1</sup> after 800 cycles, effectively alleviating the volume expansion problem of Fe<sub>2</sub>O<sub>3</sub> materials during the charging and discharging process. Fe–Cu-MOF-derived 5Fe<sub>2</sub>O<sub>3</sub>/CuO nanocomposites are expected to become ideal for high-performance lithium-ion battery anode materials due to their excellent electrochemical properties and broad application prospects.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125803"},"PeriodicalIF":3.5,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Enhancing the gas barrier performance of polyurethane (PU) via functional additives has garnered growing interest to expand its application scope. Herein, we synthesized a series of micron-sized Mg2Al-layered double hydroxides (LDHs) via hydrothermal method by varying Mg2+ concentrations (denoted as 0.1-, 0.4-, 0.6-, 0.8-, and 1.0-LDH). Subsequently, LDH/PU composite films were fabricated by dispersing Mg2Al-LDH into the PU matrix using a solvent mixing approach. Comprehensive characterization of crystalline structure, morphology, gas barrier performance, thermal stability, and mechanical properties was conducted. Results revealed high dispersion of LDH fillers within the PU matrix without adverse effects on PU crystallization. Among them, notably, 0.2-LDH/PU composites exhibited significantly enhanced gas barrier properties compared to neat PU, with a 5 wt% loading of 0.2-LDH identified as optimal for superior barrier performance. The improved gas barrier performance stems from hydrogen bonding interactions between LDH hydroxyl groups and PU amino groups, which enhance filler-polymer compatibility and suppress PU hard segment mobility. Additionally, LDH incorporation effectively reinforced the thermal stability and mechanical properties of the composites. These findings highlight micron-sized LDHs as promising functional additives, paving the way for future development of high-performance PU with tailored gas barrier capabilities.
{"title":"Layered double hydroxide/polyurethane composites: Influence of micron-sized LDH on the gas barrier properties of polyurethane","authors":"Menghua Zhao , Qian Zhang , Yinghan Guo , Yalin Shi , Weiliang Tian , Yongjun Feng","doi":"10.1016/j.jssc.2025.125801","DOIUrl":"10.1016/j.jssc.2025.125801","url":null,"abstract":"<div><div>Enhancing the gas barrier performance of polyurethane (PU) via functional additives has garnered growing interest to expand its application scope. Herein, we synthesized a series of micron-sized Mg<sub>2</sub>Al-layered double hydroxides (LDHs) via hydrothermal method by varying Mg<sup>2+</sup> concentrations (denoted as 0.1-, 0.4-, 0.6-, 0.8-, and 1.0-LDH). Subsequently, LDH/PU composite films were fabricated by dispersing Mg<sub>2</sub>Al-LDH into the PU matrix using a solvent mixing approach. Comprehensive characterization of crystalline structure, morphology, gas barrier performance, thermal stability, and mechanical properties was conducted. Results revealed high dispersion of LDH fillers within the PU matrix without adverse effects on PU crystallization. Among them, notably, 0.2-LDH/PU composites exhibited significantly enhanced gas barrier properties compared to neat PU, with a 5 wt% loading of 0.2-LDH identified as optimal for superior barrier performance. The improved gas barrier performance stems from hydrogen bonding interactions between LDH hydroxyl groups and PU amino groups, which enhance filler-polymer compatibility and suppress PU hard segment mobility. Additionally, LDH incorporation effectively reinforced the thermal stability and mechanical properties of the composites. These findings highlight micron-sized LDHs as promising functional additives, paving the way for future development of high-performance PU with tailored gas barrier capabilities.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125801"},"PeriodicalIF":3.5,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-27DOI: 10.1016/j.jssc.2025.125800
Xiaoxuan Min , Ru Xiao , Bo Zhang , Bingyan Shi , Jingyu Gao , Xinyu Sun , Zitong Wu , Aiman Li , Yishan Wang , Ying Deng
The construction of highly efficient pH-universal hydrogen evolution reaction (HER) electrocatalysts remains a significant challenge in hydrogen production via water electrolysis. Herein, we report a self-supported CoRu alloy@nitrogen-doped porous carbon/carbon cloth (Co10Ru@CN/CC) electrode fabricated through a two-step protocol combining room-temperature active ions trapping and in-situ calcination. The in-situ carbonthermal reduction can effectively supress the aggregation of CoRu alloy nanoparticles and produce abundant lattice defects for highly active reaction sites, as well as the involved N element can enhance the coupled effect between metal speices and carbon matrix for promoted durability and charge transfer. Notably, CoRu@CN/CC achieves exceptional HER performance with overpotentials of only 175 and 426 mV in acidic and alkaline media at 200 mA cm−2, respectively. More importantly, it maintains stable operation for 100 h in acidic solution at 100 mA cm−2 with negligible activity decay. This work presents a scalable strategy for designing pH-universal self-supported HER platinum-like electrode, advancing the feasibility of green hydrogen economy.
高效的ph -通用析氢反应（HER）电催化剂的构建仍然是水电解制氢领域的一个重大挑战。在此，我们报告了一种自支撑CoRu alloy@nitrogen-doped多孔碳/碳布（Co10Ru@CN/CC）电极，通过结合室温活性离子捕获和原位煅烧的两步工艺制备。原位碳热还原可以有效抑制CoRu合金纳米颗粒的聚集，在高活性反应位点产生丰富的晶格缺陷，并且所涉及的N元素可以增强金属种与碳基体之间的耦合效应，从而提高耐久性和电荷转移。值得注意的是，CoRu@CN/CC在200 mA cm - 2的酸性和碱性介质中分别获得了175和426 mV的过电位，具有优异的HER性能。更重要的是，它在100 mA cm−2的酸性溶液中保持100小时的稳定运行，活性衰减可以忽略不计。本文提出了一种可扩展的设计ph通用型自支撑HER类铂电极的策略，提高了绿色氢经济的可行性。
{"title":"Nitrogen-doped carbon-supported CoRu nanoalloys for enhanced pH-universal hydrogen evolution","authors":"Xiaoxuan Min , Ru Xiao , Bo Zhang , Bingyan Shi , Jingyu Gao , Xinyu Sun , Zitong Wu , Aiman Li , Yishan Wang , Ying Deng","doi":"10.1016/j.jssc.2025.125800","DOIUrl":"10.1016/j.jssc.2025.125800","url":null,"abstract":"<div><div>The construction of highly efficient pH-universal hydrogen evolution reaction (HER) electrocatalysts remains a significant challenge in hydrogen production <em>via</em> water electrolysis. Herein, we report a self-supported CoRu alloy@nitrogen-doped porous carbon/carbon cloth (Co<sub>10</sub>Ru@CN/CC) electrode fabricated through a two-step protocol combining room-temperature active ions trapping and <em>in-situ</em> calcination. The <em>in-situ</em> carbonthermal reduction can effectively supress the aggregation of CoRu alloy nanoparticles and produce abundant lattice defects for highly active reaction sites, as well as the involved N element can enhance the coupled effect between metal speices and carbon matrix for promoted durability and charge transfer. Notably, CoRu@CN/CC achieves exceptional HER performance with overpotentials of only 175 and 426 mV in acidic and alkaline media at 200 mA cm<sup>−2</sup>, respectively. More importantly, it maintains stable operation for 100 h in acidic solution at 100 mA cm<sup>−2</sup> with negligible activity decay. This work presents a scalable strategy for designing pH-universal self-supported HER platinum-like electrode, advancing the feasibility of green hydrogen economy.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125800"},"PeriodicalIF":3.5,"publicationDate":"2025-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To study the effect of the amino substituent of the organic ligand on photoluminescent and colorimetric properties and therefore thermometric properties of lanthanide coordination polymers, 5-aminoisophthalic acid (NH2–H2aip) was used to synthesize a new series of lanthanide coordination polymers. They are the homometallic [LnIII(NH3+-aip)(NH2-aip)(H2O)2]∙1.25H2O (LnIII = PrIII, NdIII, SmIII, EuIII, GdIII and TbIII) and the bimetallic [EuIIIxTbIII1-x(NH3+-aip)(NH2-aip)(H2O)2]∙1.25H2O. Their structures and properties were fully characterized. The single crystal structures were elucidated. The singlet and triplet state energies of the mixed NH3+-aip2-/NH2-aip2- ligands were estimated and the photoluminescent and colorimetric properties of the synthesized frameworks were studied in the solid state at room temperature. The lifetimes and quantum yields of the emissions of SmIII, EuIII and TbIII frameworks were also determined revealing the crucial role of TbIII as the sensitized center and EuIII as the emission center in the bimetallic frameworks. To evaluate potential of the bimetallic frameworks in ratiometric thermometry, their temperature-dependent photoluminescent and colorimetric responses were explored. Thermometric parameters were determined based on both responses, and the linear temperature dependence was derived. Within the temperature range of 25.0–80.0 °C, sensitivity, accuracy and precision of the temperature measurements were then demonstrated reflected through the noteworthy thermal sensitivity (2.05 and 4.69 %∙K−1) as well as excellent uncertainty and repeatability (ca. 97 % for ten successive cycles). The reducing uncertainty of the colorimetric-based measurements at elevated temperatures was also illustrated.
{"title":"Lanthanide-aminoisophthalates: From temperature-dependent photoluminescence and colorimetry to ratiometric thermometry","authors":"Thammanoon Chuasaard , Malee Sinchow , Bunlawee Yotnoi , Athipong Ngamjarurojana , Nobuto Yoshinari , Apinpus Rujiwatra","doi":"10.1016/j.jssc.2025.125799","DOIUrl":"10.1016/j.jssc.2025.125799","url":null,"abstract":"<div><div>To study the effect of the amino substituent of the organic ligand on photoluminescent and colorimetric properties and therefore thermometric properties of lanthanide coordination polymers, 5-aminoisophthalic acid (NH<sub>2</sub>–H<sub>2</sub>aip) was used to synthesize a new series of lanthanide coordination polymers. They are the homometallic [Ln<sup>III</sup>(NH<sub>3</sub><sup>+</sup>-aip)(NH<sub>2</sub>-aip)(H<sub>2</sub>O)<sub>2</sub>]∙1.25H<sub>2</sub>O (Ln<sup>III</sup> = Pr<sup>III</sup>, Nd<sup>III</sup>, Sm<sup>III</sup>, Eu<sup>III</sup>, Gd<sup>III</sup> and Tb<sup>III</sup>) and the bimetallic [Eu<sup>III</sup><sub>x</sub>Tb<sup>III</sup><sub>1-x</sub>(NH<sub>3</sub><sup>+</sup>-aip)(NH<sub>2</sub>-aip)(H<sub>2</sub>O)<sub>2</sub>]∙1.25H<sub>2</sub>O. Their structures and properties were fully characterized. The single crystal structures were elucidated. The singlet and triplet state energies of the mixed NH<sub>3</sub><sup>+</sup>-aip<sup>2-</sup>/NH<sub>2</sub>-aip<sup>2-</sup> ligands were estimated and the photoluminescent and colorimetric properties of the synthesized frameworks were studied in the solid state at room temperature. The lifetimes and quantum yields of the emissions of Sm<sup>III</sup>, Eu<sup>III</sup> and Tb<sup>III</sup> frameworks were also determined revealing the crucial role of Tb<sup>III</sup> as the sensitized center and Eu<sup>III</sup> as the emission center in the bimetallic frameworks. To evaluate potential of the bimetallic frameworks in ratiometric thermometry, their temperature-dependent photoluminescent and colorimetric responses were explored. Thermometric parameters were determined based on both responses, and the linear temperature dependence was derived. Within the temperature range of 25.0–80.0 °C, sensitivity, accuracy and precision of the temperature measurements were then demonstrated reflected through the noteworthy thermal sensitivity (2.05 and 4.69 %∙<em>K</em><sup>−1</sup>) as well as excellent uncertainty and repeatability (<em>ca.</em> 97 % for ten successive cycles). The reducing uncertainty of the colorimetric-based measurements at elevated temperatures was also illustrated.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125799"},"PeriodicalIF":3.5,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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