Pub Date : 2025-02-03DOI: 10.1016/j.materresbull.2025.113345
Ali Valizadeh , Aboulfazl Mirzapoor , Zahra Hallaji , Mahtab Jahanshah Talab , Bijan Ranjbar
Investigation of nanoparticle (NP)-protein interactions is crucial, as it provides critical insights into the behavior of NPs within biological systems. In this study, magnetite nanoparticles (Fe3O4 NPs) were coated with polyethylene glycol 400 (PEG400) using a novel modified chemical co-precipitation method. The structural, morphological, and magnetic properties of Fe3O4-PEG400 NPs were characterized. The NPs show superparamagnetism, very small size, and high colloidal stability. After that, the effect of Fe3O4-PEG400 NPs was investigated on proteins (human serum albumin: HSA and lysozyme: Lyso) and cells (fibroblast) using fluorescence spectroscopy, circular dichroism (CD) spectropolarimetry, and MTT assay. Results showed minimal alteration in the secondary structure of proteins but the tertiary structure of proteins shows some flexibility. Moreover, the cytotoxicity test indicates Fe3O4-PEG400 NPs show better biocompatibility than Fe3O4 NPs and has an IC50 of 65 µg/mL. In summary, the biocompatibility, stability, and superparamagnetism of Fe3O4-PEG400 NPs enhance their potential for biomedical applications.
{"title":"Synthesis of superparamagnetic Fe3O4-PEG400 nanoparticles: Investigation of interaction with proteins and toxicity on cells","authors":"Ali Valizadeh , Aboulfazl Mirzapoor , Zahra Hallaji , Mahtab Jahanshah Talab , Bijan Ranjbar","doi":"10.1016/j.materresbull.2025.113345","DOIUrl":"10.1016/j.materresbull.2025.113345","url":null,"abstract":"<div><div>Investigation of nanoparticle (NP)-protein interactions is crucial, as it provides critical insights into the behavior of NPs within biological systems. In this study, magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub> NPs) were coated with polyethylene glycol 400 (PEG400) using a novel modified chemical co-precipitation method. The structural, morphological, and magnetic properties of Fe<sub>3</sub>O<sub>4</sub>-PEG400 NPs were characterized. The NPs show superparamagnetism, very small size, and high colloidal stability. After that, the effect of Fe<sub>3</sub>O<sub>4</sub>-PEG400 NPs was investigated on proteins (human serum albumin: HSA and lysozyme: Lyso) and cells (fibroblast) using fluorescence spectroscopy, circular dichroism (CD) spectropolarimetry, and MTT assay. Results showed minimal alteration in the secondary structure of proteins but the tertiary structure of proteins shows some flexibility. Moreover, the cytotoxicity test indicates Fe<sub>3</sub>O<sub>4</sub>-PEG400 NPs show better biocompatibility than Fe<sub>3</sub>O<sub>4</sub> NPs and has an IC<sub>50</sub> of 65 µg/mL. In summary, the biocompatibility, stability, and superparamagnetism of Fe<sub>3</sub>O<sub>4</sub>-PEG400 NPs enhance their potential for biomedical applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113345"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395254","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}
Fast charging, large storage, and efficient energy recovery are key to sustainable energy systems. Lithium-ion capacitors (LICs), combining the energy density of lithium-ion batteries (LIBs) and the power density of supercapacitors (SCs), offer a promising solution. This study introduces highly porous activated carbon from silkworm pupae waste (ACPP) for high-performance energy storage. ACPP was synthesized using hydrothermal carbonization in acetic acid media and subsequently activated with potassium carbonate, yielding a 2,476 m²/g surface area and 1.48 cm³/g pore volume. ACPP achieved a specific capacitance of 412 F/g for SCs and a discharge capacity of 969.2 mAh/g for LIBs, significantly outperforming commercial graphite. The ACPP//ACPP LIC device delivered 65 Wh/kg energy density, 260 W/kg power density, and retained over 80 % capacity after 10,000 cycles. This work highlights a sustainable approach to energy storage by upcycling waste material, reducing carbon emissions, and improving LIC performance.
{"title":"Versatile porous activated carbon from silkworm pupae waste for electrochemical energy storage systems","authors":"Saran Youngjan , Chonticha Rajrujithong , Vichuda Sattayarut , Jakkapop Phanthasri , Kajornsak Faungnawakij , Panitan Kewcharoenwong , Rattabal Khunphonoi , Khongvit Prasitnok , Aphinan Saengsrichan , Issaraporn Rakngam , Weradesh Sangkhun , Sopon Butcha , Chalathorn Chanthad , Pongtanawat Khemthong","doi":"10.1016/j.materresbull.2025.113347","DOIUrl":"10.1016/j.materresbull.2025.113347","url":null,"abstract":"<div><div>Fast charging, large storage, and efficient energy recovery are key to sustainable energy systems. Lithium-ion capacitors (LICs), combining the energy density of lithium-ion batteries (LIBs) and the power density of supercapacitors (SCs), offer a promising solution. This study introduces highly porous activated carbon from silkworm pupae waste (ACPP) for high-performance energy storage. ACPP was synthesized using hydrothermal carbonization in acetic acid media and subsequently activated with potassium carbonate, yielding a 2,476 m²/g surface area and 1.48 cm³/g pore volume. ACPP achieved a specific capacitance of 412 F/g for SCs and a discharge capacity of 969.2 mAh/g for LIBs, significantly outperforming commercial graphite. The ACPP//ACPP LIC device delivered 65 Wh/kg energy density, 260 W/kg power density, and retained over 80 % capacity after 10,000 cycles. This work highlights a sustainable approach to energy storage by upcycling waste material, reducing carbon emissions, and improving LIC performance.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113347"},"PeriodicalIF":5.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377017","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}
Electroless-plated cobalt alloys with tungsten typically exceeding 5 at.% are the common barrier materials for copper metallization. As cobalt is a new interconnect material for advanced microchips, it is worth studying the advanced cobalt-interconnect metallization process that involves extremely diluted cobalt-tungsten (CoW) alloys with an eliminated impurity resistivity and enhanced electromigration reliability. To this aim, we fabricated three different CoW nanolines with 0.03, 0.06 and 0.11 at.% of W using an electroless process, and examined their electromigration behaviors under accelerated stressing conditions, using Co lines as a control. All three W contents, especially 0.06 at.%, mitigate Co electromigration. The mechanism for the electromigration mitigation is due to an improvement of the film's nanomechanical and surface wetting properties, as well as grain-structure refinements. A full account of the relationship between the film properties, grain structures and electromigration testing results is given, reasonably explaining the cause of the reliability optimization.
{"title":"Influence of trace tungsten contents on thin-film properties and electromigration behaviors of electroless-deposited cobalt interconnect lines","authors":"Jau-Shiung Fang , Ting-Hsun Su , Yi-Lung Cheng , Chun-Wei Huang , Giin-Shan Chen","doi":"10.1016/j.materresbull.2025.113343","DOIUrl":"10.1016/j.materresbull.2025.113343","url":null,"abstract":"<div><div>Electroless-plated cobalt alloys with tungsten typically exceeding 5 at.% are the common barrier materials for copper metallization. As cobalt is a new interconnect material for advanced microchips, it is worth studying the advanced cobalt-interconnect metallization process that involves extremely diluted cobalt-tungsten (CoW) alloys with an eliminated impurity resistivity and enhanced electromigration reliability. To this aim, we fabricated three different CoW nanolines with 0.03, 0.06 and 0.11 at.% of W using an electroless process, and examined their electromigration behaviors under accelerated stressing conditions, using Co lines as a control. All three W contents, especially 0.06 at.%, mitigate Co electromigration. The mechanism for the electromigration mitigation is due to an improvement of the film's nanomechanical and surface wetting properties, as well as grain-structure refinements. A full account of the relationship between the film properties, grain structures and electromigration testing results is given, reasonably explaining the cause of the reliability optimization.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113343"},"PeriodicalIF":5.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132850","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 : 2025-01-31DOI: 10.1016/j.materresbull.2025.113339
Liz Hannah George , S. Prathapan , Nishad K․ V․ , Manoj Komath , G.S. Sailaja
Image guided therapeutics, a multimodal approach in cancer treatment where combinatorial imaging and therapy in a single system, has become highly pertinent contemporary chemotherapeutic approach. Herein, a bismuth/Fe3O4 metal organic framework nanocomposite system (BiTP/ Fe3O4) having high X-ray visibility (2981.8 HU) and saturation magnetization prepared by in situ synthesis is presented for computed tomography based imaging and magnetic hyperthermia therapy. Surface anchored Fe3O4 nanoparticles on MOF crystals enable magnetic targeting in the presence of external magnetic field and exhibit hyperthermia potential while bismuth serve as a potential contrast agent due to its intrinsic radiopaque properties. The synergistic effect generated in a single system has a hyperthermia time-temperature profile (42. 1 °C within 7 min) and X-ray visibility. Cytocompatibility of the system has been verified by MTT and live dead assay. Preferential uptake of BiTP/Fe3O4 by Human osteosarcoma cells was affirmed by prussian blue staining, which further benefits to the hyperthermia treatment.
{"title":"Bismuth/Fe3O4 in situ metal organic framework nanocomposite for image guided magnetic hyperthermia therapy","authors":"Liz Hannah George , S. Prathapan , Nishad K․ V․ , Manoj Komath , G.S. Sailaja","doi":"10.1016/j.materresbull.2025.113339","DOIUrl":"10.1016/j.materresbull.2025.113339","url":null,"abstract":"<div><div>Image guided therapeutics, a multimodal approach in cancer treatment where combinatorial imaging and therapy in a single system, has become highly pertinent contemporary chemotherapeutic approach. Herein, a bismuth/Fe<sub>3</sub>O<sub>4</sub> metal organic framework nanocomposite system (BiTP/ Fe<sub>3</sub>O<sub>4</sub>) having high X-ray visibility (2981.8 HU) and saturation magnetization prepared by <em>in situ</em> synthesis is presented for computed tomography based imaging and magnetic hyperthermia therapy. Surface anchored Fe<sub>3</sub>O<sub>4</sub> nanoparticles on MOF crystals enable magnetic targeting in the presence of external magnetic field and exhibit hyperthermia potential while bismuth serve as a potential contrast agent due to its intrinsic radiopaque properties. The synergistic effect generated in a single system has a hyperthermia time-temperature profile (42. 1 °C within 7 min) and X-ray visibility. Cytocompatibility of the system has been verified by MTT and live dead assay. Preferential uptake of BiTP/Fe<sub>3</sub>O<sub>4</sub> by Human osteosarcoma cells was affirmed by prussian blue staining, which further benefits to the hyperthermia treatment.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113339"},"PeriodicalIF":5.3,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276171","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 : 2025-01-30DOI: 10.1016/j.materresbull.2025.113322
Himanshu, J.J. Pulikkotil
The ground state of LaCoGe has been a subject of debate, with experimental evidence pointing towards both nonmagnetic and antiferromagnetic ordering of Co spins. To elucidate this controversy, we conducted first-principles density functional theory (DFT) calculations. Surprisingly, our initial calculations predicted a ferromagnetic ground state. Given the nonmagnetic nature of the isoelectronic compound LaCoSi and the general tendency of R-T-X (R = rare earths, T = transition metals, X = p-block elements) materials to be nonmagnetic (except for T = Mn), we delve deeper into the role of spin fluctuations in LaCoGe. Our calculations revealed an underestimation of the electronic specific heat compared to experimental data, suggesting the presence of such fluctuations. Employing the Ginzburg–Landau phenomenological theory and fixed spin moment calculations, we investigate the influence of spin fluctuations on the magnetic properties of LaCoGe. Our results indicate that this material is situated near a magnetic quantum critical point, making it a promising candidate for further experimental and theoretical investigations to explore its unique quantum critical phenomena.
{"title":"Inference of ferromagnetic quantum criticality in LaCoGe, using first-principles","authors":"Himanshu, J.J. Pulikkotil","doi":"10.1016/j.materresbull.2025.113322","DOIUrl":"10.1016/j.materresbull.2025.113322","url":null,"abstract":"<div><div>The ground state of LaCoGe has been a subject of debate, with experimental evidence pointing towards both nonmagnetic and antiferromagnetic ordering of Co spins. To elucidate this controversy, we conducted first-principles density functional theory (DFT) calculations. Surprisingly, our initial calculations predicted a ferromagnetic ground state. Given the nonmagnetic nature of the isoelectronic compound LaCoSi and the general tendency of R-T-X (R = rare earths, T = transition metals, X = p-block elements) materials to be nonmagnetic (except for T = Mn), we delve deeper into the role of spin fluctuations in LaCoGe. Our calculations revealed an underestimation of the electronic specific heat compared to experimental data, suggesting the presence of such fluctuations. Employing the Ginzburg–Landau phenomenological theory and fixed spin moment calculations, we investigate the influence of spin fluctuations on the magnetic properties of LaCoGe. Our results indicate that this material is situated near a magnetic quantum critical point, making it a promising candidate for further experimental and theoretical investigations to explore its unique quantum critical phenomena.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113322"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132544","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 : 2025-01-30DOI: 10.1016/j.materresbull.2025.113338
Anita D Souza , Shamima Hussain , Sudhindra Rayaprol , Nishkala KR , Vikash Mishra , Mamatha D Daivajna
Interesting structural and physical properties observed in La0.7-xBixSr0.3MnO3 are attributable to the Bi3+ concentration (x). In order to understand the role played by Bi3+ substitution in influencing lattice dynamics and magnetic ground state, we carried out Raman spectroscopy studies on a series of La0.7-xBixSr0.3MnO3 (x = 0.0 – 0.70) samples. As the Bi3+ concentration increases from x = 0.0 to 0.30, the magnetic ground state transforms from dominantly ferromagnetic metallic to the coexistence of ferro and antiferromagnetic phases. Correspondingly a significant increase in the number of Raman modes has been noticed, which specifies a transition in the crystal structure. The Raman spectra of ferromagnetic La0.7Sr0.3MnO3 (i.e., x = 0.0) has been accounted for considering the rhombohedral symmetry (). Whereas for Bi3+ substituted samples (i.e., x ≥ 0.30), the Raman spectra show the phonon modes corresponding to orthorhombic () symmetry. To compare with experimental values, theoretical Raman modes were calculated using Quantum Espresso code. The variation in the Raman spectra with Bi3+ substitution suggests a strong influence of lattice distortion on the electrical and magnetic behavior, highlighting a strong structure-property correlation in the system. Additionally, phonon modes show softening across the magnetic ordering temperature indicating the spin-phonon coupling of the system. The the theortical frame work using Balkanski model confirms the above conclusion.
{"title":"Influence of Bi3+ substitution on spin-phonon coupling in La0.7Sr0.3MnO3 Manganites: A Raman spectroscopy study","authors":"Anita D Souza , Shamima Hussain , Sudhindra Rayaprol , Nishkala KR , Vikash Mishra , Mamatha D Daivajna","doi":"10.1016/j.materresbull.2025.113338","DOIUrl":"10.1016/j.materresbull.2025.113338","url":null,"abstract":"<div><div>Interesting structural and physical properties observed in La<sub>0.7-</sub><em><sub>x</sub></em>Bi<em><sub>x</sub></em>Sr<sub>0.3</sub>MnO<sub>3</sub> are attributable to the Bi<sup>3+</sup> concentration (<em>x</em>). In order to understand the role played by Bi<sup>3+</sup> substitution in influencing lattice dynamics and magnetic ground state, we carried out Raman spectroscopy studies on a series of La<sub>0.7-</sub><em><sub>x</sub></em>Bi<em><sub>x</sub></em>Sr<sub>0.3</sub>MnO<sub>3</sub> (<em>x</em> = 0.0 – 0.70) samples. As the Bi<sup>3+</sup> concentration increases from <em>x</em> = 0.0 to 0.30, the magnetic ground state transforms from dominantly ferromagnetic metallic to the coexistence of ferro and antiferromagnetic phases. Correspondingly a significant increase in the number of Raman modes has been noticed, which specifies a transition in the crystal structure. The Raman spectra of ferromagnetic La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> (i.e., <em>x</em> = 0.0) has been accounted for considering the rhombohedral symmetry (<span><math><msubsup><mi>D</mi><mrow><mn>3</mn><mi>d</mi></mrow><mn>6</mn></msubsup></math></span>). Whereas for Bi<sup>3+</sup> substituted samples (i.e., <em>x</em> ≥ 0.30), the Raman spectra show the phonon modes corresponding to orthorhombic (<span><math><msubsup><mi>D</mi><mrow><mn>2</mn><mi>h</mi></mrow><mn>16</mn></msubsup></math></span>) symmetry. To compare with experimental values, theoretical Raman modes were calculated using Quantum Espresso code. The variation in the Raman spectra with Bi<sup>3+</sup> substitution suggests a strong influence of lattice distortion on the electrical and magnetic behavior, highlighting a strong structure-property correlation in the system. Additionally, phonon modes show softening across the magnetic ordering temperature indicating the spin-phonon coupling of the system. The the theortical frame work using Balkanski model confirms the above conclusion.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113338"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-30DOI: 10.1016/j.materresbull.2025.113337
K C Sowmiya , K A Vijayalakshmi
Research into supercapacitor electrodes focused on composite materials made from Air plasma-exposed MnCo2O4 and Air plasma-exposed OPAC. The surface area for composite 1a (APE/MnCo2O4@APE/OPAC) was found to be 691 m²/g, indicating a highly mesoporous structure. Using a three-electrode setup and a coin cell configuration, the study found that combining Air plasma-exposed MnCo2O4 with Air plasma-exposed OPAC resulted in a specific capacitance of 1012 F/g at 0.5 mA/g. Electrochemical impedance spectroscopy revealed a significant reduction in charge transfer resistance from 20.97 Ω to 2.4 Ω, highlighting improved conductivity. The fabricated coin cell device demonstrated a specific capacitance of 678 F/g with 96 % efficiency over 15,000 cycles, exhibiting an energy density of 241 Wh/kg and a power density of 2798 W/kg at 0.5 mA/g. At 2.5 mA/g, the energy density was 172 Wh/kg, and the power density reached 4987 W/kg. The composite electrode maintained 97.98 % efficiency after 15,000 cycles, demonstrating outstanding stability.
{"title":"Outstanding stability of separate air plasma exposed MnCo2O4@OPAC nano composite coin cell for supercapacitor utilization","authors":"K C Sowmiya , K A Vijayalakshmi","doi":"10.1016/j.materresbull.2025.113337","DOIUrl":"10.1016/j.materresbull.2025.113337","url":null,"abstract":"<div><div>Research into supercapacitor electrodes focused on composite materials made from Air plasma-exposed MnCo2O4 and Air plasma-exposed OPAC. The surface area for composite 1a (APE/MnCo<sub>2</sub>O<sub>4</sub>@APE/OPAC) was found to be 691 m²/g, indicating a highly mesoporous structure. Using a three-electrode setup and a coin cell configuration, the study found that combining Air plasma-exposed MnCo<sub>2</sub>O<sub>4</sub> with Air plasma-exposed OPAC resulted in a specific capacitance of 1012 F/g at 0.5 mA/g. Electrochemical impedance spectroscopy revealed a significant reduction in charge transfer resistance from 20.97 Ω to 2.4 Ω, highlighting improved conductivity. The fabricated coin cell device demonstrated a specific capacitance of 678 F/g with 96 % efficiency over 15,000 cycles, exhibiting an energy density of 241 Wh/kg and a power density of 2798 W/kg at 0.5 mA/g. At 2.5 mA/g, the energy density was 172 Wh/kg, and the power density reached 4987 W/kg. The composite electrode maintained 97.98 % efficiency after 15,000 cycles, demonstrating outstanding stability.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113337"},"PeriodicalIF":5.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276170","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 : 2025-01-29DOI: 10.1016/j.materresbull.2025.113336
Xiaojuan Lu, Jialin Yang, Ke Huang, Songtao Liu
Template-regulated Li0.33La0.56TiO3 (LLTO) powders are synthesized using CTAB via a hydrothermal method. The hybird LLTO is obtained by mixing the template-regulated LLTO powders with Li1.3Al0.3Ti1.7(PO4)3 (LATP) powders and non-templated LLTO powders. In the non-templated LLTO, small round grains develop, while large grains with a high aspect ratio tend to form in the template-regulated LLTO. The total conductivity of the hybrid LLTO increases, reaching 1.28×10−4 S cm−1. The presence of specific mesopores and the bridging effect among grains create an optimal balance between the mobility and density of lithium ions, therefore contributing to the increase of the conductivity. The hybrid LLTO demonstrates improved higher fracture toughness, indicating a greater cycling tolerance. It also exhibits superior initial capacity and a slower degradation rate. These results present a novel approach to prepare lithium-ion conductors with enhanced performance.
{"title":"Enhanced ionic conductivity and improved electrochemical performance of hybrid Li0.33La0.56TiO3","authors":"Xiaojuan Lu, Jialin Yang, Ke Huang, Songtao Liu","doi":"10.1016/j.materresbull.2025.113336","DOIUrl":"10.1016/j.materresbull.2025.113336","url":null,"abstract":"<div><div>Template-regulated Li<sub>0.33</sub>La<sub>0.56</sub>TiO<sub>3</sub> (LLTO) powders are synthesized using CTAB via a hydrothermal method. The hybird LLTO is obtained by mixing the template-regulated LLTO powders with Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> (LATP) powders and non-templated LLTO powders. In the non-templated LLTO, small round grains develop, while large grains with a high aspect ratio tend to form in the template-regulated LLTO. The total conductivity of the hybrid LLTO increases, reaching 1.28×10<sup>−4</sup> S cm<sup>−1</sup>. The presence of specific mesopores and the bridging effect among grains create an optimal balance between the mobility and density of lithium ions, therefore contributing to the increase of the conductivity. The hybrid LLTO demonstrates improved higher fracture toughness, indicating a greater cycling tolerance. It also exhibits superior initial capacity and a slower degradation rate. These results present a novel approach to prepare lithium-ion conductors with enhanced performance.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113336"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132852","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 : 2025-01-29DOI: 10.1016/j.materresbull.2025.113335
M.V. Arularasu , P. Vinitha , V. Vetrivelan , M․Yasmin Begum , A. Siddiqua
Our study aims to synthesize undoped vanadium pentoxide (V2O5) and rare earth element cerium (Ce) doped V2O5 nanoparticles through ultrasonic-assisted synthesis to manufacture efficient photocatalysts and supercapacitor electrodes for first time. XRD analysis confirms that the orthorhombic crystal phase of both V2O5 nanoparticles represents the incorporation of Ce4+ ion into the V2O5 crystal structure by substitution and average crystalline sizes around 22–30 nm. Among the samples, Ce-doped V2O5 nanoparticles exhibited excellent photocatalytic activity by degrading 92 % of the rhodamine B (RhB) dye within 60 min under visible light irradiation. Ce-doped V2O5 revealed superior performance compared to V2O5 nanoparticles (190.9 F g−1) on the basis of specific capacitance (Cs) values (321.9 F g−1) at a current density of 1 A g−1. The capacitance stability of the designed electrode was 95.2 % after 5000 cycles, as predicted. Additionally, novelty of preset work is a density functional theory (DFT) based simulation indicated that the doping of Ce reduced the V2O5 band gap by forming shallow doping states close to the valence and conduction energy bands. The existence of shallow dopant states and the band gap decrease promote effective charge separation and better photon adsorption of Ce-doped V2O5, which ends up with improved photocatalytic activity. Our finding suggests the improvement in catalytic and electrochemical efficacy is attributed to dopant ions affecting the recombination process of the electron-hole pairs produced by the photon absorption.
{"title":"Ce Doped V2O5 nanoparticles for dual functionality: Photocatalytic degradation of organic dye and supercapacitor applications","authors":"M.V. Arularasu , P. Vinitha , V. Vetrivelan , M․Yasmin Begum , A. Siddiqua","doi":"10.1016/j.materresbull.2025.113335","DOIUrl":"10.1016/j.materresbull.2025.113335","url":null,"abstract":"<div><div>Our study aims to synthesize undoped vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) and rare earth element cerium (Ce) doped V<sub>2</sub>O<sub>5</sub> nanoparticles through ultrasonic-assisted synthesis to manufacture efficient photocatalysts and supercapacitor electrodes for first time. XRD analysis confirms that the orthorhombic crystal phase of both V<sub>2</sub>O<sub>5</sub> nanoparticles represents the incorporation of Ce<sup>4+</sup> ion into the V<sub>2</sub>O<sub>5</sub> crystal structure by substitution and average crystalline sizes around 22–30 nm. Among the samples, Ce-doped V<sub>2</sub>O<sub>5</sub> nanoparticles exhibited excellent photocatalytic activity by degrading 92 % of the rhodamine B (RhB) dye within 60 min under visible light irradiation. Ce-doped V<sub>2</sub>O<sub>5</sub> revealed superior performance compared to V<sub>2</sub>O<sub>5</sub> nanoparticles (190.9 F g<sup>−1</sup>) on the basis of specific capacitance (Cs) values (321.9 F g<sup>−1</sup>) at a current density of 1 A g<sup>−1</sup>. The capacitance stability of the designed electrode was 95.2 % after 5000 cycles, as predicted. Additionally, novelty of preset work is a density functional theory (DFT) based simulation indicated that the doping of Ce reduced the V<sub>2</sub>O<sub>5</sub> band gap by forming shallow doping states close to the valence and conduction energy bands. The existence of shallow dopant states and the band gap decrease promote effective charge separation and better photon adsorption of Ce-doped V<sub>2</sub>O<sub>5</sub>, which ends up with improved photocatalytic activity. Our finding suggests the improvement in catalytic and electrochemical efficacy is attributed to dopant ions affecting the recombination process of the electron-hole pairs produced by the photon absorption.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113335"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132543","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 : 2025-01-29DOI: 10.1016/j.materresbull.2025.113341
Xinlin Liu , Yansong Chu , Na Gong , Jiaqi Wang , Jie Jin , Liguang Tang , Yu Gu , Ziyang Lu
Converting CO2 into valuable hydrocarbons through photocatalysis is a promising approach to mitigate the greenhouse effect and tackle energy scarcity. In this study, a boron-doped polyphosphazene (BPC) photocatalyst has been introduced, synthesized via a straightforward one-step solvothermal process, exhibiting a high selectivity of 95.2 % for the conversion of CO2 to CH4. The boron doping substantially decreases the bandgap and enhances the capacity to absorb visible light, thereby improving the utilization efficiency of photoelectrons. Additionally, the introduction of boron creates impurity states that efficiently trap photogenerated electrons, minimizing the recombination of photogenerated charge carriers and thereby prolonging their lifetimes. Comparatively, the BPC exhibits superior photocatalytic activity to the pristine polyphosphazene (PC). Under simulated solar irradiation, BPC showcases excellent photocatalytic performance, producing CO and CH4 at rates of 20.6 and 103.4 μmol g-1h-1, respectively. This study underscores BPC's potential as an efficient and selective photocatalyst for converting CO2 into renewable methane fuel.
{"title":"Nanoarchitectonics with boron-doped polyphosphazene for improved selectivity in the photocatalytic conversion of carbon dioxide to methane","authors":"Xinlin Liu , Yansong Chu , Na Gong , Jiaqi Wang , Jie Jin , Liguang Tang , Yu Gu , Ziyang Lu","doi":"10.1016/j.materresbull.2025.113341","DOIUrl":"10.1016/j.materresbull.2025.113341","url":null,"abstract":"<div><div>Converting CO<sub>2</sub> into valuable hydrocarbons through photocatalysis is a promising approach to mitigate the greenhouse effect and tackle energy scarcity. In this study, a boron-doped polyphosphazene (BPC) photocatalyst has been introduced, synthesized via a straightforward one-step solvothermal process, exhibiting a high selectivity of 95.2 % for the conversion of CO<sub>2</sub> to CH<sub>4</sub>. The boron doping substantially decreases the bandgap and enhances the capacity to absorb visible light, thereby improving the utilization efficiency of photoelectrons. Additionally, the introduction of boron creates impurity states that efficiently trap photogenerated electrons, minimizing the recombination of photogenerated charge carriers and thereby prolonging their lifetimes. Comparatively, the BPC exhibits superior photocatalytic activity to the pristine polyphosphazene (PC). Under simulated solar irradiation, BPC showcases excellent photocatalytic performance, producing CO and CH<sub>4</sub> at rates of 20.6 and 103.4 μmol g<sup>-1</sup>h<sup>-1</sup>, respectively. This study underscores BPC's potential as an efficient and selective photocatalyst for converting CO<sub>2</sub> into renewable methane fuel.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113341"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132851","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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