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}
Pub Date : 2025-01-29DOI: 10.1016/j.materresbull.2025.113342
Tien Van Huynh , Vi T.T. Nguyen , Oanh T.K. Nguyen
The BiOBr photocatalysts with varied morphologies were prepared utilizing the solvothermal approach with solvents. The effects of different solvents on the characteristics and morphology of BiOBr materials were investigated in depth. The photocatalytic activity of the as-synthesized BiOBr samples was determined by their capacity to degrade Doxycycline (DC) under visible light. The quenching tests revealed that •O₂⁻ and e⁻ have played a significant role in DC degradation. At a DC concentration of 15 ppm, the BiOBr catalyst, which was produced by dissolving bismuth nitrate in isopropanol, achieved a degrading efficiency of approximately 80%. Reuse studies, together with X-ray diffraction (XRD) and scanning electron microscopy (SEM) examinations of before and after catalysts, validated the reusability and enhanced stability of the as-prepared material. Furthermore, liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used to determine the degradation routes of DC intermediates, and toxicity studies were carried out using quantitative structure-activity relationship (QSAR) modeling.
{"title":"Study on the influence of solvent type on the morphology and properties of BiOBr nanosheets through the photodegradation of Doxycycline","authors":"Tien Van Huynh , Vi T.T. Nguyen , Oanh T.K. Nguyen","doi":"10.1016/j.materresbull.2025.113342","DOIUrl":"10.1016/j.materresbull.2025.113342","url":null,"abstract":"<div><div>The BiOBr photocatalysts with varied morphologies were prepared utilizing the solvothermal approach with solvents. The effects of different solvents on the characteristics and morphology of BiOBr materials were investigated in depth. The photocatalytic activity of the as-synthesized BiOBr samples was determined by their capacity to degrade Doxycycline (DC) under visible light. The quenching tests revealed that <sup>•</sup>O₂⁻ and e⁻ have played a significant role in DC degradation. At a DC concentration of 15 ppm, the BiOBr catalyst, which was produced by dissolving bismuth nitrate in isopropanol, achieved a degrading efficiency of approximately 80%. Reuse studies, together with X-ray diffraction (XRD) and scanning electron microscopy (SEM) examinations of before and after catalysts, validated the reusability and enhanced stability of the as-prepared material. Furthermore, liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used to determine the degradation routes of DC intermediates, and toxicity studies were carried out using quantitative structure-activity relationship (QSAR) modeling.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113342"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132849","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}
Lithium-sulfur batteries is widely regarded as a kind of novel next-generation energy-storage candidates. MoO2 nanoparticles, converted from the pyrolysis of ammonium molybdate tetrahydrate via calcination in nitrogen, is uniformly coated on pre-treated Ketjen Black networks to configure a novel cathode substrate for Lithium-sulfur batteries in this study. As supported by structure-performance discussion, it is no suspicious to conclude that as-designed MoO2 coating acts as not only adsorbent, but also catalyst, thus granting the as-designed composite cathode obviously enhanced cycling stability. The initial discharging capacity of the lithium-sulfur batteries with composite cathode is around 1218.85 mAh·g−1 at 0.1C. The discharge capacity of the batteries decreases from 724.90 to 458.76 mAh·g−1 with a discharging capacity retention rate of 63.3 % after galvanostatic cycling for 500 cycles at 2C. This work provides an effective methodology for constructing a cathode substrate candidate for Li-S batteries with excellent electrochemical performances.
{"title":"Synergistically accelerating the electrochemical performance of Lithium-sulfur batteries by MoO2 nanoparticles","authors":"Shengpeng Xue, Chunxi Hai, Yanxia Sun, Shengde Dong, Luxiang Ma, Xin He, Qi Xu, Yuan Zhou","doi":"10.1016/j.materresbull.2025.113340","DOIUrl":"10.1016/j.materresbull.2025.113340","url":null,"abstract":"<div><div>Lithium-sulfur batteries is widely regarded as a kind of novel next-generation energy-storage candidates. MoO<sub>2</sub> nanoparticles, converted from the pyrolysis of ammonium molybdate tetrahydrate via calcination in nitrogen, is uniformly coated on pre-treated Ketjen Black networks to configure a novel cathode substrate for Lithium-sulfur batteries in this study. As supported by structure-performance discussion, it is no suspicious to conclude that as-designed MoO<sub>2</sub> coating acts as not only adsorbent, but also catalyst, thus granting the as-designed composite cathode obviously enhanced cycling stability. The initial discharging capacity of the lithium-sulfur batteries with composite cathode is around 1218.85 mAh·g<sup>−1</sup> at 0.1C. The discharge capacity of the batteries decreases from 724.90 to 458.76 mAh·g<sup>−1</sup> with a discharging capacity retention rate of 63.3 % after galvanostatic cycling for 500 cycles at 2C. This work provides an effective methodology for constructing a cathode substrate candidate for Li-S batteries with excellent electrochemical performances.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113340"},"PeriodicalIF":5.3,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132847","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 : 2025-01-28DOI: 10.1016/j.materresbull.2025.113334
Xiao Feng , Yu Zhang , Lin Han , Xianjin Feng
The amorphous In-Al-Sn-O (IATO) is a very promising material fulfilling the increasing demands of thin film transistors (TFTs). Here, high performance IATO films and TFTs were prepared using RF magnetron sputtering with the sputtering power (20–200 W) being systematically investigated and optimized for the first time. All IATO films exhibited an amorphous structure, dense and flat surfaces, high average absolute visible transmittances (95.0 to 96.6%), and large optical band gaps (4.18 to 4.44 eV). The TFTs fabricated at 50 W demonstrated the best overall performance including the highest saturation mobility (10.71 ± 1.79 cm2 V-1 s-1) and on-off current ratio (11.89 ± 4.33 × 108), as well as the lowest subthreshold swing (0.30 ± 0.07 V dec-1) and hysteresis (0.11 ± 0.50 V) values. Meanwhile, the 50 W-fabricated IATO TFTs also showed high stability under the gate bias and illumination stresses, further indicating the promising application prospects of our IATO TFTs.
{"title":"Enhanced performance of In-Al-Sn-O films and thin film transistors achieved via regulating the RF magnetron sputtering power","authors":"Xiao Feng , Yu Zhang , Lin Han , Xianjin Feng","doi":"10.1016/j.materresbull.2025.113334","DOIUrl":"10.1016/j.materresbull.2025.113334","url":null,"abstract":"<div><div>The amorphous In-Al-Sn-O (IATO) is a very promising material fulfilling the increasing demands of thin film transistors (TFTs). Here, high performance IATO films and TFTs were prepared using RF magnetron sputtering with the sputtering power (20–200 W) being systematically investigated and optimized for the first time. All IATO films exhibited an amorphous structure, dense and flat surfaces, high average absolute visible transmittances (95.0 to 96.6%), and large optical band gaps (4.18 to 4.44 eV). The TFTs fabricated at 50 W demonstrated the best overall performance including the highest saturation mobility (10.71 ± 1.79 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>) and on-off current ratio (11.89 ± 4.33 × 10<sup>8</sup>), as well as the lowest subthreshold swing (0.30 ± 0.07 V dec<sup>-1</sup>) and hysteresis (0.11 ± 0.50 V) values. Meanwhile, the 50 W-fabricated IATO TFTs also showed high stability under the gate bias and illumination stresses, further indicating the promising application prospects of our IATO TFTs.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"186 ","pages":"Article 113334"},"PeriodicalIF":5.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132542","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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