Pub Date : 2026-04-01Epub Date: 2026-01-03DOI: 10.1016/j.solidstatesciences.2026.108210
Mohammad Amir Shamsizadeh , Siyavash Kazemi Movahed , Zahra Bahreini , Keun Hwa Chae , Ali Habibi Khuzani
Natural enzymes, despite their high efficiency, suffer from instability and high costs, limiting their practical use. Nanozymes which are nanomaterial-based enzyme mimics offer a robust alternative. Here, we report the design and synthesis of a bimetallic nanozyme consisting of iron and ruthenium nanoparticles that are immobilized on ordered mesoporous carbon spheres (FeRu@OMCS). This nanozyme exhibits exceptional peroxidase-like activity driven by a synergistic electronic interaction between the two metals. X-ray photoelectron spectroscopy shows charge transfer from ruthenium to iron and demonstrates this interaction. The FeRu@OMCS nanozyme has an outstandingly low Michaelis-Menten constant (Km) of 0.043 mM with the substrate tetramethylbenzidine (TMB), indicating a higher affinity for the substrate than that of its monometallic counterparts and even natural horseradish peroxidase. This work presents a rational design strategy for creating highly active, stable, and cost-effective bimetallic nanozymes for potential applications in diagnostics and catalysis.
{"title":"Iron-ruthenium nanoparticles on ordered mesoporous carbon: A bimetallic nanozyme with superior peroxidase-like activity","authors":"Mohammad Amir Shamsizadeh , Siyavash Kazemi Movahed , Zahra Bahreini , Keun Hwa Chae , Ali Habibi Khuzani","doi":"10.1016/j.solidstatesciences.2026.108210","DOIUrl":"10.1016/j.solidstatesciences.2026.108210","url":null,"abstract":"<div><div>Natural enzymes, despite their high efficiency, suffer from instability and high costs, limiting their practical use. Nanozymes which are nanomaterial-based enzyme mimics offer a robust alternative. Here, we report the design and synthesis of a bimetallic nanozyme consisting of iron and ruthenium nanoparticles that are immobilized on ordered mesoporous carbon spheres (FeRu@OMCS). This nanozyme exhibits exceptional peroxidase-like activity driven by a synergistic electronic interaction between the two metals. X-ray photoelectron spectroscopy shows charge transfer from ruthenium to iron and demonstrates this interaction. The FeRu@OMCS nanozyme has an outstandingly low Michaelis-Menten constant (K<sub>m</sub>) of 0.043 mM with the substrate tetramethylbenzidine (TMB), indicating a higher affinity for the substrate than that of its monometallic counterparts and even natural horseradish peroxidase. This work presents a rational design strategy for creating highly active, stable, and cost-effective bimetallic nanozymes for potential applications in diagnostics and catalysis.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108210"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923423","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 : 2026-04-01Epub Date: 2026-01-19DOI: 10.1016/j.solidstatesciences.2026.108232
Xiujuan Cao, Tian Tian, Gang Li
The biotoxicity of p-nitrophenol (PNP) can be alleviated significantly through chemical reduction with sodium borohydride assisted by catalyst. Nevertheless, suffering from aggregation deactivation and difficulty in recovery of traditional powder catalysts, the practical application of this approach is greatly limited. Herein, we fabricated the monolithic catalyst Ni3S2@NF with enhanced active-site accessibility and convenient recyclability through hydrothermal treatment of nickel foam (NF) in sodium sulfide solution. The resultant Ni3S2@NF showed exceptional ability in catalyzing reduction of PNP with NaBH4. A reductive conversion of 93.35 % for 500 mL of PNP with an initial concentration of 15 mg L−1 within 25 min was obtained under the reaction conditions: two pieces of Ni3S2@NF (2 × 3 × 3 cm2), 20 mM NaBH4 and a reaction temperature of 25 °C. The corresponding reaction rate constant was 0.1089 min−1, which was 8.25 times higher than that in the system of NF/NaBH4, revealing the critical catalytic role of the Ni3S2. Kinetic studies confirmed that the reduction reaction followed the Langmuir–Hinshelwood mechanism, with a low apparent activation energy of 19.12 kJ mol−1. Additionally, the monolithic catalyst without special regeneration treatment exhibited robust reusability, retaining a PNP conversion of over 89.91 % after 15 consecutive cycles. Therefore, such Ni3S2@NF is expected to have the potenital as an efficient, stable, and easily separable non-noble metal catalyst for the remediation of nitroaromatic-contaminated wastewater.
{"title":"Investigation of Ni3S2@NF as a catalyst for the NaBH4-mediated chemical reduction of p-nitrophenol","authors":"Xiujuan Cao, Tian Tian, Gang Li","doi":"10.1016/j.solidstatesciences.2026.108232","DOIUrl":"10.1016/j.solidstatesciences.2026.108232","url":null,"abstract":"<div><div>The biotoxicity of p-nitrophenol (PNP) can be alleviated significantly through chemical reduction with sodium borohydride assisted by catalyst. Nevertheless, suffering from aggregation deactivation and difficulty in recovery of traditional powder catalysts, the practical application of this approach is greatly limited. Herein, we fabricated the monolithic catalyst Ni<sub>3</sub>S<sub>2</sub>@NF with enhanced active-site accessibility and convenient recyclability through hydrothermal treatment of nickel foam (NF) in sodium sulfide solution. The resultant Ni<sub>3</sub>S<sub>2</sub>@NF showed exceptional ability in catalyzing reduction of PNP with NaBH<sub>4</sub>. A reductive conversion of 93.35 % for 500 mL of PNP with an initial concentration of 15 mg L<sup>−1</sup> within 25 min was obtained under the reaction conditions: two pieces of Ni<sub>3</sub>S<sub>2</sub>@NF (2 × 3 × 3 cm<sup>2</sup>), 20 mM NaBH<sub>4</sub> and a reaction temperature of 25 °C. The corresponding reaction rate constant was 0.1089 min<sup>−1</sup>, which was 8.25 times higher than that in the system of NF/NaBH<sub>4</sub>, revealing the critical catalytic role of the Ni<sub>3</sub>S<sub>2</sub>. Kinetic studies confirmed that the reduction reaction followed the Langmuir–Hinshelwood mechanism, with a low apparent activation energy of 19.12 kJ mol<sup>−1</sup>. Additionally, the monolithic catalyst without special regeneration treatment exhibited robust reusability, retaining a PNP conversion of over 89.91 % after 15 consecutive cycles. Therefore, such Ni<sub>3</sub>S<sub>2</sub>@NF is expected to have the potenital as an efficient, stable, and easily separable non-noble metal catalyst for the remediation of nitroaromatic-contaminated wastewater.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108232"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074175","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 : 2026-04-01Epub Date: 2025-12-28DOI: 10.1016/j.solidstatesciences.2025.108202
Seok Hwang Yun , Sun Jin Yun , Muhammad Atif Khan , Gil-Ho Kim
The magnetic domain-induced transition in strongly correlated vanadium dioxide (VO2) is studied at cryogenic temperatures. Here, measurements are carried out at insulating, metallic, and transition regimes, where a complex dynamic between the electric and magnetic properties of the metallic and insulating domains results in an interesting observation of the metal-insulator transition induced and tuned by the applied magnetic field. The bidirectional measurements show hysteresis and peaks upon the application of positive and negative electric and magnetic fields. The appearance of higher hysteresis indicates the interplay of various magnetic domains, whereas an overall positive magnetoresistance, abrupt transitions, and a steep decline in current point towards the alignment, shrinking, and expansion of the metallic domains with increasing magnetic field strength.
{"title":"Magnetic field-induced modulation of metal-insulator transition in surface-doped VO2 nanowires at cryogenic temperatures","authors":"Seok Hwang Yun , Sun Jin Yun , Muhammad Atif Khan , Gil-Ho Kim","doi":"10.1016/j.solidstatesciences.2025.108202","DOIUrl":"10.1016/j.solidstatesciences.2025.108202","url":null,"abstract":"<div><div>The magnetic domain-induced transition in strongly correlated vanadium dioxide (VO<sub>2</sub>) is studied at cryogenic temperatures. Here, measurements are carried out at insulating, metallic, and transition regimes, where a complex dynamic between the electric and magnetic properties of the metallic and insulating domains results in an interesting observation of the metal-insulator transition induced and tuned by the applied magnetic field. The bidirectional measurements show hysteresis and peaks upon the application of positive and negative electric and magnetic fields. The appearance of higher hysteresis indicates the interplay of various magnetic domains, whereas an overall positive magnetoresistance, abrupt transitions, and a steep decline in current point towards the alignment, shrinking, and expansion of the metallic domains with increasing magnetic field strength.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108202"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883759","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 : 2026-04-01Epub Date: 2026-01-08DOI: 10.1016/j.solidstatesciences.2026.108226
Anjali Vinay , P. Haripriya , E.V. Anjana , Veera V.E. Ramesh , B.N. Reddy , R.S.S. Srikanth Vemuri , Darbha V. Ravi Kumar
g-C3N4 (g-CN), known to show variable photocatalytic activities depending on its modifications. Such modifications include elemental doping, crystallinity, surface area and more recently with triazine and heptazine rings. In particular, carbon nitride with triazine ring, i.e. poly(triazine imide) (PTI) evolved as new class of carbon nitride material. This work explores the photo, piezo and piezo-photocatalytic activities of PTI towards the ciprofloxacin degradation and the results are compared with unmodified g-CN. PTI has shown enhanced piezocatalytic activity than g-CN whereas the latter exhibits enhanced photocatalytic properties. Such variation can open the possibilities of homojunctions constructions with excellent catalytic efficiencies.
{"title":"Switch on ultrasound and light: Exploring the piezo and photocatalytic properties of triazine carbon nitride towards the degradation of ciprofloxacin","authors":"Anjali Vinay , P. Haripriya , E.V. Anjana , Veera V.E. Ramesh , B.N. Reddy , R.S.S. Srikanth Vemuri , Darbha V. Ravi Kumar","doi":"10.1016/j.solidstatesciences.2026.108226","DOIUrl":"10.1016/j.solidstatesciences.2026.108226","url":null,"abstract":"<div><div>g-C<sub>3</sub>N<sub>4</sub> (g-CN), known to show variable photocatalytic activities depending on its modifications. Such modifications include elemental doping, crystallinity, surface area and more recently with triazine and heptazine rings. In particular, carbon nitride with triazine ring, i.e. poly(triazine imide) (PTI) evolved as new class of carbon nitride material. This work explores the photo, piezo and piezo-photocatalytic activities of PTI towards the ciprofloxacin degradation and the results are compared with unmodified g-CN. PTI has shown enhanced piezocatalytic activity than g-CN whereas the latter exhibits enhanced photocatalytic properties. Such variation can open the possibilities of homojunctions constructions with excellent catalytic efficiencies.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108226"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973852","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 : 2026-04-01Epub Date: 2026-01-10DOI: 10.1016/j.solidstatesciences.2026.108228
Yunping Zhoujin, Michael Anim Safo, Navindra Keerthisinghe, Mark D. Smith, Sophya Garashchuk, Hans-Conrad zur Loye
Inorganic–organic hybrid materials have been widely investigated for their applications in catalysis, optics, magnetism, and biomedicine. Copper halide complexes are of particular interest due to their structural diversity and physicochemical properties. Conventional crystal growth approaches, such as slow evaporation and hydro(solvo)thermal synthesis, typically require extended reaction times and often favor thermodynamically stable phases. In this study, we prepared ten copper-phenanthroline halide (X = Cl, Br, and I) complexes using both traditional hydrothermal reactions and microwave-assisted hydrothermal methods and obtained [CuI(C12H8N2)2][I3], [C12H9N2][CuI2]·(H2O)1.42, [CuI(C12H8N2)2]2[I]3[C12H9N2]·3(H2O), [Cu2Cl4(C12H8N2)2], [CuBr(C12H8N2)2]4[Cu2Br4][CuBr2][Br]2[C12H9N2]·(H2O)3.44, [CuBr2(C12H8N2)] and [Cu3Br3(C12H8N2)2]. The comparative results show that microwave-assisted reactions shorten the reaction time and yield additional products that are not accessible through conventional hydrothermal conditions. These findings demonstrate that microwave heating provides a complementary pathway to conventional approaches, broadening the range of accessible copper halide complexes and contributing to the design and exploration of inorganic–organic hybrid systems.
{"title":"Synthesis of copper-phenanthroline complexes: A solvothermal-compatible approach for the exploration of metal complexes","authors":"Yunping Zhoujin, Michael Anim Safo, Navindra Keerthisinghe, Mark D. Smith, Sophya Garashchuk, Hans-Conrad zur Loye","doi":"10.1016/j.solidstatesciences.2026.108228","DOIUrl":"10.1016/j.solidstatesciences.2026.108228","url":null,"abstract":"<div><div>Inorganic–organic hybrid materials have been widely investigated for their applications in catalysis, optics, magnetism, and biomedicine. Copper halide complexes are of particular interest due to their structural diversity and physicochemical properties. Conventional crystal growth approaches, such as slow evaporation and hydro(solvo)thermal synthesis, typically require extended reaction times and often favor thermodynamically stable phases. In this study, we prepared ten copper-phenanthroline halide (X = Cl, Br, and I) complexes using both traditional hydrothermal reactions and microwave-assisted hydrothermal methods and obtained [CuI(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>][I<sub>3</sub>], [C<sub>12</sub>H<sub>9</sub>N<sub>2</sub>][CuI<sub>2</sub>]·(H<sub>2</sub>O)<sub>1.42</sub>, [CuI(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>]<sub>2</sub>[I]<sub>3</sub>[C<sub>12</sub>H<sub>9</sub>N<sub>2</sub>]·3(H<sub>2</sub>O), [Cu<sub>2</sub>Cl<sub>4</sub>(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>], [CuBr(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>]<sub>4</sub>[Cu<sub>2</sub>Br<sub>4</sub>][CuBr<sub>2</sub>][Br]<sub>2</sub>[C<sub>12</sub>H<sub>9</sub>N<sub>2</sub>]·(H<sub>2</sub>O)<sub>3.44</sub>, [CuBr<sub>2</sub>(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)] and [Cu<sub>3</sub>Br<sub>3</sub>(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>]. The comparative results show that microwave-assisted reactions shorten the reaction time and yield additional products that are not accessible through conventional hydrothermal conditions. These findings demonstrate that microwave heating provides a complementary pathway to conventional approaches, broadening the range of accessible copper halide complexes and contributing to the design and exploration of inorganic–organic hybrid systems.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108228"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023328","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 : 2026-04-01Epub Date: 2026-01-08DOI: 10.1016/j.solidstatesciences.2026.108227
Rakan Hussein Bashir , Ibrahim Inanc , Lakhdar Benahmedi , Samia Moulebhar , Mehmet Kuru , Ali Aissani
This study reports the fabrication and characterization of flexible methylammonium lead iodide (MAPbI3) perovskite solar cells produced under the uncontrolled high-humidity and high-temperature summer conditions of Samsun, Turkey, where relative humidity (RH) regularly exceeds 90 % and ambient temperature approaches 30 °C. A simple one-step spin-coating method was employed without the use of gloveboxes, vacuum chambers, or environmental control systems conditions that reflect realistic laboratory settings in humid, coastal environments. Structural, morphological, optical, and electrical characterizations were performed using XRD, SEM, EDS, FTIR, UV–Vis spectroscopy, and electrochemical impedance spectroscopy (EIS). XRD confirmed the formation of phase-pure, crystalline MAPbI3 with dominant (110) orientation despite the adverse ambient atmosphere. SEM analysis revealed compact yet partially defective morphologies resulting from moisture-induced heterogeneous crystallization. EDS confirmed compositional integrity with minor oxygen enrichment attributed to environmental oxidation. FTIR and UV–Vis spectra verified the retention of characteristic perovskite vibrational and optical features, indicating partial chemical stability during film formation. Electrical measurements exhibited diode-like I-V behavior and moderate charge transport characteristics consistent with Jonscher's power law, confirming the semiconducting nature of the layers even under high-humidity processing. These findings demonstrate that while device efficiency is limited under such extreme conditions, perovskite film formation and photovoltaic functionality remain achievable, providing critical empirical insights for low-cost, humidity-tolerant fabrication strategies suitable for subtropical and coastal regions.
{"title":"Fabrication and performance of MAPbI3 perovskite solar cells under extreme humidity conditions: A spin-coating approach","authors":"Rakan Hussein Bashir , Ibrahim Inanc , Lakhdar Benahmedi , Samia Moulebhar , Mehmet Kuru , Ali Aissani","doi":"10.1016/j.solidstatesciences.2026.108227","DOIUrl":"10.1016/j.solidstatesciences.2026.108227","url":null,"abstract":"<div><div>This study reports the fabrication and characterization of flexible methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite solar cells produced under the uncontrolled high-humidity and high-temperature summer conditions of Samsun, Turkey, where relative humidity (RH) regularly exceeds 90 % and ambient temperature approaches 30 °C. A simple one-step spin-coating method was employed without the use of gloveboxes, vacuum chambers, or environmental control systems conditions that reflect realistic laboratory settings in humid, coastal environments. Structural, morphological, optical, and electrical characterizations were performed using XRD, SEM, EDS, FTIR, UV–Vis spectroscopy, and electrochemical impedance spectroscopy (EIS). XRD confirmed the formation of phase-pure, crystalline MAPbI<sub>3</sub> with dominant (110) orientation despite the adverse ambient atmosphere. SEM analysis revealed compact yet partially defective morphologies resulting from moisture-induced heterogeneous crystallization. EDS confirmed compositional integrity with minor oxygen enrichment attributed to environmental oxidation. FTIR and UV–Vis spectra verified the retention of characteristic perovskite vibrational and optical features, indicating partial chemical stability during film formation. Electrical measurements exhibited diode-like I-V behavior and moderate charge transport characteristics consistent with Jonscher's power law, confirming the semiconducting nature of the layers even under high-humidity processing. These findings demonstrate that while device efficiency is limited under such extreme conditions, perovskite film formation and photovoltaic functionality remain achievable, providing critical empirical insights for low-cost, humidity-tolerant fabrication strategies suitable for subtropical and coastal regions.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108227"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973853","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 : 2026-04-01Epub Date: 2026-01-17DOI: 10.1016/j.solidstatesciences.2026.108231
Katja Engel, Thomas Schleid
Solid-state syntheses with polysulfide fluxes in sealed silica ampoules offer common approaches for the successful preparation of lanthanoid thiophosphates and -arsenates. However, the synthesis of the new dysprosium thioarsenate(V) from Rb2S3, As2S3, Dy and S at 823 K illustrates the effect of the ampoule orientation and the melt-surface during the synthesis. crystallizes monoclinically in the centrosymmetric space group with 1586.12(9) pm, 954.08(5) pm, 784.37(4) pm and 97.165(3)°for 4. Within its crystal structure, two anionic building blocks arise, namely tetrahedral units and disulfide dumbbells . These anions construct the eightfold sulfur coordination sphere around the unique Dy cations, assembling as face-connected bicapped trigonal prisms to form { } chains. They propagate along [001] and showcase a disulfide backside and a front of sulfur thorns. Separated by Rb cations in seven- and tenfold sulfur coordination, which complete the three-dimensional network, they are leaving small empty channels in [001] direction. Single-crystal Raman spectroscopy confirmed the presence of both disulfide dumbbells and tetrahedra.
{"title":"Rb2Dy[S2][AsS4]: Synthesis and characterization of a novel lanthanoid thioarsenate(V) containing outer-sphere disulfide dumbbells","authors":"Katja Engel, Thomas Schleid","doi":"10.1016/j.solidstatesciences.2026.108231","DOIUrl":"10.1016/j.solidstatesciences.2026.108231","url":null,"abstract":"<div><div>Solid-state syntheses with polysulfide fluxes in sealed silica ampoules offer common approaches for the successful preparation of lanthanoid thiophosphates and -arsenates. However, the synthesis of the new dysprosium thioarsenate(V) <figure><img></figure> from Rb<sub>2</sub>S<sub>3</sub>, As<sub>2</sub>S<sub>3</sub>, Dy and S at 823 K illustrates the effect of the ampoule orientation and the melt-surface during the synthesis. <figure><img></figure> crystallizes monoclinically in the centrosymmetric space group <span><math><mrow><mi>P</mi><msub><mrow><mn>2</mn></mrow><mrow><mn>1</mn></mrow></msub><mo>/</mo><mi>c</mi></mrow></math></span> with <span><math><mrow><mi>a</mi><mo>=</mo></mrow></math></span> 1586.12(9) pm, <span><math><mrow><mi>b</mi><mo>=</mo></mrow></math></span> 954.08(5) pm, <span><math><mrow><mi>c</mi><mo>=</mo></mrow></math></span> 784.37(4) pm and <span><math><mrow><mi>β</mi><mo>=</mo></mrow></math></span> 97.165(3)°for <span><math><mrow><mi>Z</mi><mo>=</mo></mrow></math></span> 4. Within its crystal structure, two anionic building blocks arise, namely tetrahedral <figure><img></figure> units and disulfide dumbbells <figure><img></figure> . These anions construct the eightfold sulfur coordination sphere around the unique Dy<span><math><msup><mrow></mrow><mrow><mn>3</mn><mo>+</mo></mrow></msup></math></span> cations, assembling as face-connected bicapped trigonal prisms to form <span><math><mfrac><mrow><mn>1</mn></mrow><mrow><mi>∞</mi></mrow></mfrac></math></span>{ <figure><img></figure> } chains. They propagate along [001] and showcase a disulfide backside and a front of sulfur thorns. Separated by Rb<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span> cations in seven- and tenfold sulfur coordination, which complete the three-dimensional network, they are leaving small empty channels in [001] direction. Single-crystal Raman spectroscopy confirmed the presence of both disulfide dumbbells <figure><img></figure> and <figure><img></figure> tetrahedra.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108231"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023336","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}
A high-functioning flower-like ZIF-67/NiAl-LDH-CNTs electrode was successfully synthesized in this study and used to develop an asymmetric supercapacitor (ASC). First, ZIF-67 with a dodecahedral structure was prepared. Next, NiAl-LDH was grown in situ on the ZIF-67 surface via a one-step hydrothermal method. Finally, CNTs were introduced to enhance the conductivity and stability of the electrode material. The obtained ZIF-67/NiAl-LDH-CNTs electrode material exhibited a high specific capacity of 972.1 C g−1 at a current density of 1 A g−1. A specific capacity of up to 360.1 C g−1 could be attained even upon increasing the current density to 15 A g−1, demonstrating excellent rate performance. The assembled ZIF-67/NiAl-LDH-CNTs//AC asymmetric supercapacitor had an acceptable energy density (25.3 Wh kg−1 at a power density of 900.8 W kg−1) and high cycling stability (an 87 % capacitance retention rate at 1 A g−1 after 10,000 cycles).
本研究成功合成了一种高功能的花状ZIF-67/NiAl-LDH-CNTs电极，并用于制备非对称超级电容器（ASC）。首先，制备了具有十二面体结构的ZIF-67。接下来，通过一步水热法在ZIF-67表面原位生长NiAl-LDH。最后，引入碳纳米管来提高电极材料的导电性和稳定性。得到的ZIF-67/NiAl-LDH-CNTs电极材料在电流密度为1 a g−1时的比容量高达972.1 C g−1。即使将电流密度增加到15 A g−1，也可以获得高达360.1 C g−1的比容量，表现出优异的速率性能。组装的ZIF-67/NiAl-LDH-CNTs//AC非对称超级电容器具有可接受的能量密度（在功率密度为900.8 W kg - 1时为25.3 Wh kg - 1）和高循环稳定性（在1 a g - 1下循环10,000次后电容保持率为87%）。
{"title":"Integrating globular ZIF-67/NiAl-LDH heterostructures with carbon nanotubes to enhance the performance of asymmetric supercapacitors","authors":"Shipeng Ge , Zhe Guo , Lulu Zhang, Qiangqiang Zhang, Chang Cheng, Lili Geng, Yongming Zeng","doi":"10.1016/j.solidstatesciences.2026.108209","DOIUrl":"10.1016/j.solidstatesciences.2026.108209","url":null,"abstract":"<div><div>A high-functioning flower-like ZIF-67/NiAl-LDH-CNTs electrode was successfully synthesized in this study and used to develop an asymmetric supercapacitor (ASC). First, ZIF-67 with a dodecahedral structure was prepared. Next, NiAl-LDH was grown in situ on the ZIF-67 surface via a one-step hydrothermal method. Finally, CNTs were introduced to enhance the conductivity and stability of the electrode material. The obtained ZIF-67/NiAl-LDH-CNTs electrode material exhibited a high specific capacity of 972.1 C g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>. A specific capacity of up to 360.1 C g<sup>−1</sup> could be attained even upon increasing the current density to 15 A g<sup>−1</sup>, demonstrating excellent rate performance. The assembled ZIF-67/NiAl-LDH-CNTs//AC asymmetric supercapacitor had an acceptable energy density (25.3 Wh kg<sup>−1</sup> at a power density of 900.8 W kg<sup>−1</sup>) and high cycling stability (an 87 % capacitance retention rate at 1 A g<sup>−1</sup> after 10,000 cycles).</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108209"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923424","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 : 2026-04-01Epub Date: 2026-01-06DOI: 10.1016/j.solidstatesciences.2026.108219
Priyanka Lakharwal , Prayas Chandra Patel
Ternary intermetallic arsenides represent an underexplored class of materials with unique electronic structures arising from ordered multi-metallic bonding, yet their solution-based synthesis and electrocatalytic applications remain largely unexplored. Herein, we report the first experimental synthesis of a cobalt-nickel-arsenic ternary intermetallic compound (CoNiAs) via a simple and sustainable wet-chemical reduction route, followed by thermal treatment under a reductive atmosphere. The as-synthesized CoNiAs crystallizes in a hexagonal structure (space group P-62m) with nanoscale particle dimensions and high phase purity with particle size 30–180 nm. The consolidated, binder-free CoNiAs electrode exhibits excellent electrocatalytic activity toward the oxygen evolution reaction (OER), achieving an overpotential of 260 mV at a current density of 10 mA cm−2 in 1 M KOH, comparable to benchmark IrO2 catalysts. Moreover, the CoNiAs electrode exhibits a pinnacle current density of 1050 mA cm−2 while sustaining operational stability for 60 h. Post-OER structural and surface analyses reveal that CoNiAs undergoes in situ surface reconstruction, forming catalytically active CoOOH and NiOOH species, accompanied by partial arsenic leaching. This transformation confirms the role of CoNiAs as an electro(pre)catalyst, where the ternary arsenide precursor facilitates the generation of a porous and active oxyhydroxide framework. This study establishes CoNiAs as a new ternary intermetallic platform for electrocatalysis and highlights the potential of arsenide-based precursors in designing high-performance, non-noble metal OER catalysts through controlled surface reconstruction.
三元金属间砷化物是一类未被充分开发的材料，具有由有序多金属键形成的独特电子结构，但其基于溶液的合成和电催化应用在很大程度上仍未被开发。在此，我们报告了第一个通过简单和可持续的湿化学还原途径合成钴-镍-砷三元金属间化合物（CoNiAs）的实验，然后在还原气氛下进行热处理。合成的CoNiAs结晶为六方结构（空间群P-62m），颗粒尺寸为纳米级，相纯度较高，粒径为30 ~ 180 nm。固结的、无粘结剂的CoNiAs电极对析氧反应（OER）表现出优异的电催化活性，在1 M KOH的电流密度为10 mA cm−2时达到260 mV的过电位，与基准IrO2催化剂相当。此外，CoNiAs电极的峰值电流密度为1050 mA cm−2，同时保持60小时的运行稳定性。Post-OER结构和表面分析表明，CoNiAs进行了原位表面重建，形成了催化活性的CoOOH和NiOOH，并伴有部分砷浸出。这一转变证实了CoNiAs作为电（预）催化剂的作用，其中三元砷化物前体促进了多孔活性氢氧化物框架的生成。本研究确立了CoNiAs作为一种新的三元金属间电催化平台，并强调了砷基前体通过可控表面重构设计高性能非贵金属OER催化剂的潜力。
{"title":"CoNiAs ternary intermetallic as a precursor to highly active Co/Ni oxyhydroxide catalysts for oxygen evolution reaction","authors":"Priyanka Lakharwal , Prayas Chandra Patel","doi":"10.1016/j.solidstatesciences.2026.108219","DOIUrl":"10.1016/j.solidstatesciences.2026.108219","url":null,"abstract":"<div><div>Ternary intermetallic arsenides represent an underexplored class of materials with unique electronic structures arising from ordered multi-metallic bonding, yet their solution-based synthesis and electrocatalytic applications remain largely unexplored. Herein, we report the first experimental synthesis of a cobalt-nickel-arsenic ternary intermetallic compound (CoNiAs) via a simple and sustainable wet-chemical reduction route, followed by thermal treatment under a reductive atmosphere. The as-synthesized CoNiAs crystallizes in a hexagonal structure (space group <em>P</em>-62<em>m</em>) with nanoscale particle dimensions and high phase purity with particle size 30–180 nm. The consolidated, binder-free CoNiAs electrode exhibits excellent electrocatalytic activity toward the oxygen evolution reaction (OER), achieving an overpotential of 260 mV at a current density of 10 mA cm<sup>−2</sup> in 1 M KOH, comparable to benchmark IrO<sub>2</sub> catalysts. Moreover, the CoNiAs electrode exhibits a pinnacle current density of 1050 mA cm<sup>−2</sup> while sustaining operational stability for 60 h. Post-OER structural and surface analyses reveal that CoNiAs undergoes in situ surface reconstruction, forming catalytically active CoOOH and NiOOH species, accompanied by partial arsenic leaching. This transformation confirms the role of CoNiAs as an electro(pre)catalyst, where the ternary arsenide precursor facilitates the generation of a porous and active oxyhydroxide framework. This study establishes CoNiAs as a new ternary intermetallic platform for electrocatalysis and highlights the potential of arsenide-based precursors in designing high-performance, non-noble metal OER catalysts through controlled surface reconstruction.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108219"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923426","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}
Antibiotic residues exceeding specific thresholds could cause severe damage to the ecological environment and water resources. However, traditional wastewater treatment technologies have limited capacity to remove such drugs.This study showed that P-CN/NCDs/MnFe2O4 Z-type heterojunction nanoprism composite materials were successfully synthesized by impregnating hydrothermal synthesis products. Upon addition of persulfate (K2S2O8) as an oxidant, the newly synthesized catalytic material significantly enhanced the photofenton degradation efficiency of the antibiotic contaminant gatifloxacin and substantially shortened the reaction time. Nearly complete degradation was achieved within 40 min. The outstanding degradation performance primarily stems from the heterojunction formed between P-CN/NCDs and MnFe2O4. Concurrently, the synergistic effects of this material's strong adsorption capacity, high light absorption efficiency and high carrier mobility also played a crucial role. Electron paramagnetic resonance (EPR) testing indicated that the primary reactive species formed during the reaction included •O2−, 1O2, •SO4− and •OH•. Among these, S2O82− underwent a series of responses to generate •SO4−, with electron transfer promoting the redox reactions of iron and manganese atoms. This material combines outstanding photocatalytic performance with structural stability, enabling multiple cycles of reuse. LC-MS analysis suggested a potential pathway for the photocatalytic degradation of gatifloxacin, and combined with EPR testing, proposed a hypothesis for the photocatalytic mechanism. This study deepened the understanding of the photocatalytic degradation mechanism of this catalyst, providing new insights for wastewater treatment.
{"title":"Construction of Z-type heterojunctions of nanoprismatic P-CN/NCDs loaded with MnFe2O4 for photocatalytically coupled PDS-activated degradation of gatifloxacin","authors":"Xiaoling Liu, Xiaoyan Chen, Heping Li, Wanyi Liu, Haijuan Zhan","doi":"10.1016/j.solidstatesciences.2026.108225","DOIUrl":"10.1016/j.solidstatesciences.2026.108225","url":null,"abstract":"<div><div>Antibiotic residues exceeding specific thresholds could cause severe damage to the ecological environment and water resources. However, traditional wastewater treatment technologies have limited capacity to remove such drugs.This study showed that P-CN/NCDs/MnFe<sub>2</sub>O<sub>4</sub> Z-type heterojunction nanoprism composite materials were successfully synthesized by impregnating hydrothermal synthesis products. Upon addition of persulfate (K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>) as an oxidant, the newly synthesized catalytic material significantly enhanced the photofenton degradation efficiency of the antibiotic contaminant gatifloxacin and substantially shortened the reaction time. Nearly complete degradation was achieved within 40 min. The outstanding degradation performance primarily stems from the heterojunction formed between P-CN/NCDs and MnFe<sub>2</sub>O<sub>4</sub>. Concurrently, the synergistic effects of this material's strong adsorption capacity, high light absorption efficiency and high carrier mobility also played a crucial role. Electron paramagnetic resonance (EPR) testing indicated that the primary reactive species formed during the reaction included •O<sub>2</sub><sup>−</sup>, <sup>1</sup>O<sub>2</sub>, •SO<sub>4</sub><sup>−</sup> and •OH•. Among these, S<sub>2</sub>O<sub>8</sub><sup>2−</sup> underwent a series of responses to generate •SO<sub>4</sub><sup>−</sup>, with electron transfer promoting the redox reactions of iron and manganese atoms. This material combines outstanding photocatalytic performance with structural stability, enabling multiple cycles of reuse. LC-MS analysis suggested a potential pathway for the photocatalytic degradation of gatifloxacin, and combined with EPR testing, proposed a hypothesis for the photocatalytic mechanism. This study deepened the understanding of the photocatalytic degradation mechanism of this catalyst, providing new insights for wastewater treatment.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"174 ","pages":"Article 108225"},"PeriodicalIF":3.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973782","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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