Solid State Sciences最新文献

{"title":"Heat triggered structural transformation of SiO2 coated akaganeite nanoparticles: ε-Fe2O3 phase formation","authors":"Mirjana M. Milić,&nbsp;Nataša Jović Orsini","doi":"10.1016/j.solidstatesciences.2025.108017","DOIUrl":"10.1016/j.solidstatesciences.2025.108017","url":null,"abstract":"<div><div>Orthorhombic epsilon iron oxide polymorph ε-Fe₂O₃ still attracts extensive research interest due to its interesting magnetic properties and potential applications in high-density data storage and high-frequency millimeter electromagnetic waves shielding. The present paper reports on the fabrication of ε-Fe₂O₃ polymorph through thermal treatment of silica coated akaganeite nanoparticles using various heating protocols. Morphology, structure and magnetic properties of the resulting samples were assessed by various experimental techniques. Transmission electron microscopy (TEM) of the four samples calcined at temperatures above 900 °C showed that the obtained particles were roughly oval in shape with average particle diameters (<em>D</em>_<em>TEM</em>), in the range from 13 nm to 23 nm. The X-ray diffractometry confirmed presence of prevailing ε-Fe₂O₃ phase with addition of α-Fe₂O₃ phase whose amount depended on the heating regime used. The saturation magnetization, <em>M</em>_<em>s</em>, values were in the range 9.5–11.6 Am²/kg, while the room temperature (RT) coercivity fields, <em>H</em>_<em>c</em>, ranged from 111.4 kA/m (1.4 kOe) to 1002.7 kA/m (12.6 kOe). The highest <em>M</em>_<em>s</em> and <em>H</em>_<em>c</em> were achieved in the sample heated up to 930 °C through several dwelling steps at different temperatures, while another sample also annealed at 930 °C but using different heating path, displayed substantially lower coercivity <em>H</em>_<em>c</em> = 628.7 kA/m (7.9 kOe). Annealing at higher final temperatures 940 °C and 1000 °C also did not improve coercivity due to increased number of superparamagnetic particles. Presented results emphasize importance of different parameters involved in the process of thermal treatment of epsilon iron oxide precursor samples. It was demonstrated that magnetic properties of the ε-Fe₂O₃ polymorph prepared from silica coated akaganeite nanoparticles can be tuned by employing a multistep heating protocol with carefully chosen dwelling temperatures and times.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108017"},"PeriodicalIF":3.4,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522162","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}

{"title":"Effective degradation of tetracycline by visible light-assisted activation of persulfate (PDS) by the magnetic material MnFe2O4/BC/P-CN","authors":"Xiaoling Liu,&nbsp;Wanyi Liu,&nbsp;Haijuan Zhan,&nbsp;Xiaoyan Chen,&nbsp;Heping Li","doi":"10.1016/j.solidstatesciences.2025.108016","DOIUrl":"10.1016/j.solidstatesciences.2025.108016","url":null,"abstract":"<div><div>Large amounts of antibiotic residues cause serious damage to the ecological environment and water resources. Traditional treatment techniques have limited ability to remove them. In this paper, the magnetic material MnFe₂O₄/BC/P-CN was successfully prepared using a simple combination of roasting and impregnation strategy. Photofenton degradation of antibiotic pollutant tetracycline was carried out under visible light irradiation using peroxosulfate (K₂S₂O₈) as an oxidizing agent, and the degradation rate reached 99.7 % within 70 min. This was attributed to the synergistic promotional effect between P-CN/BC and MnFe₂O₄, including good adsorption, enhanced light absorption, and high charge carrier mobility. EPR assay showed that the main active substances included •O₂⁻, ¹O₂, •SO₄⁻ and •OH, which was derived from S₂O₈²⁻, which promoted the self-oxidizing reduction of iron and manganese atoms. The materials were found to be structurally stable with excellent performance through multiple recycling. This ternary photocatalyst, composed of three semiconductors with excellent band gaps, is expected to achieve efficient absorption of sunlight. We characterized the P-CN/BC/MnFe₂O₄ photocatalyst through various analytical techniques and investigated its performance in degrading TC under visible light. Additionally, we used methods such as radical detection and intermediate product identification to thoroughly elucidate the mechanism of persulfate activation by photocatalysis and the degradation pathway of tetracycline.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108016"},"PeriodicalIF":3.4,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517699","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}

{"title":"Rb2HSc(IO3)6 – a new member of the iodate family with a structural unit [M(IO3)6]","authors":"Oksana P. Grigorieva,&nbsp;Victor A. Tafeenko,&nbsp;Alexey N. Kuznetsov,&nbsp;Peter S. Berdonosov,&nbsp;Valery A. Dolgikh","doi":"10.1016/j.solidstatesciences.2025.108015","DOIUrl":"10.1016/j.solidstatesciences.2025.108015","url":null,"abstract":"<div><div>The new compound Rb₂HSc(IO₃)₆ was prepared by the hydrothermal method. According to the single-crystal X-ray diffraction data, the compound crystallizes in the triclinic space group <em>P</em>-1, with the cell parameters <em>a</em> = 7.7390(5) Å, <em>b</em> = 7.7362(5) Å, <em>c</em> = 7.7634(6) Å, <em>α</em> = 97.197(5) ^o, <em>β</em> = 98.193(5) ^o, γ = 98.787(5) ^o. Thermal analysis shows it to be stable up to 430 °C. The compound was also characterized by the IR spectroscopy and EDX analysis. DFT calculations predict wide-gap semiconducting behavior for Rb₂HSc(IO₃)₆ and establish a bonding pattern of covalent interactions within IO₃- and ScO₆-units, accompanied by ionic interactions of these units with rubidium cations. Rb₂HSc(IO₃)₆ is considered a new phase in the A₃M(IO₃)₆ family and its structural features are presented and discussed in comparison with other family representatives. Based on the crystallographic and computational considerations, the possibility for Rb₂HSc(IO₃)₆ to form different polymorphs is also discussed.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108015"},"PeriodicalIF":3.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481214","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}

{"title":"Waste biomass-derived N, S-codoped porous carbon flakes for high energy density asymmetric supercapacitors","authors":"Jyoti Singh ,&nbsp;Baban Dey ,&nbsp;Muhammad Mudassir Ahmad Alwi ,&nbsp;SK Safdar Hossain ,&nbsp;Arup Choudhury ,&nbsp;Akbar Niaz ,&nbsp;Hayat Khan ,&nbsp;Duck-Joo Yang","doi":"10.1016/j.solidstatesciences.2025.108014","DOIUrl":"10.1016/j.solidstatesciences.2025.108014","url":null,"abstract":"<div><div>Production of affordable energy devices requires the fabrication of cheap electrode materials with high energy and power densities and long cycle stability. Carbon materials retrieved from waste biomass in sugar mills have attracted considerable attention because of their low-cost and environmental benefits. But their low capacitance and poor rate-capability still remain serious issues. Herein, activated N, S-codoped porous carbon (NS-WSB-AC) was synthesized via simultaneous in-situ and gas-phase heteroatom doping, carbonization, and KOH + CO₂ activation processes, where waste sugarcane bagasse (WSB) as a carbon source, hydrazine as a nitrogen source and H₂S gas as a sulfur source were used. As-prepared NS-WSB-AC exhibited a high specific surface area of 2455.6 m²/g, a large mesoporosity of 0.4784 cm³/g, and a substantial heteroatom content (19.45 atom%). Because of these features, the NS-WSB-AC achieved a high specific capacitance of 405.67 F/g at 0.2 A/g with remarkable rate-performance (72.7 % at 5 A/g) in a 6 M KOH electrolyte. However, the NS-WSB-AC demonstrated outstanding cycling stability (98.7 % capacitance retention after 10000 cycles) in a 1 M Na₂SO₄ electrolyte. The NS-WSB-AC//WSB-AC ASC device with KOH electrolyte exhibited a superior energy density of 54.73 Wh kg⁻¹ at a power density of 207.8 W kg⁻¹ when compared to the Na₂SO₄-based device.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108014"},"PeriodicalIF":3.4,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481213","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}

{"title":"Carbon quantum dots modified BiVO4 for boosting visible-light-responsive photocatalytic performance","authors":"Feifei Tao ,&nbsp;Xiangfeiyi Yu ,&nbsp;Linxia Wang ,&nbsp;Hongyan Bai ,&nbsp;Zhihua Liu","doi":"10.1016/j.solidstatesciences.2025.108012","DOIUrl":"10.1016/j.solidstatesciences.2025.108012","url":null,"abstract":"<div><div>Photocatalytic technology can utilize sunlight to achieve deep degradation of organic dyes under the action of catalysts. Herein, a novel composite of carbon quantum dots (CQDs) and bismuth vanadate (BiVO₄) nanoparticles were constructed via the facile solvothermal method. The procured CQDs/BiVO₄ composites exhibit large specific surface area, narrow bandgap, low recombination efficiency of photo-induced electron-hole pairs, and rapid charge transfer. The optimized CQDs/BiVO₄ composite (CB-3) loading 20 mL CQDs solution (∼1 mg mL⁻¹) can perfectly degrade methyl orange (MO), whose apparent rate constant (<em>k</em>_app) is 4.4 times greater than that of pure BiVO₄. Noteworthy, CQDs can act as an electron acceptor to hinder photoinduced electron-hole binding in BiVO₄ and extend the range of light absorption due to its unique up-conversion. Moreover, the CQDs/BiVO₄ photocatalyst demonstrates the excellent photocatalytic stability, which is conducive to the practical application. The design and fabrication of CQDs/BiVO₄ composites provides an available strategy for the development of BiVO₄-based photocatalysts.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108012"},"PeriodicalIF":3.4,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330631","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}

{"title":"Thermoluminescence properties of Ti-doped CaSiO3 single crystals","authors":"Airo Fujii,&nbsp;Keiichiro Miyazaki,&nbsp;Takumi Kato,&nbsp;Daisuke Nakauchi,&nbsp;Noriaki Kawaguchi,&nbsp;Takayuki Yanagida","doi":"10.1016/j.solidstatesciences.2025.108013","DOIUrl":"10.1016/j.solidstatesciences.2025.108013","url":null,"abstract":"<div><div>Undoped and Ti-doped CaSiO₃ single crystals were synthesized by the floating zone method, and the photoluminescence (PL) and thermoluminescence (TL) properties were researched. From the measurements of the PL and TL spectra, the emission origin of all the samples would be due to charge transfer between Ti⁴⁺ and O²⁻. In addition, all the samples indicated TL glow peaks at 70, 130, 270, and 360 °C. As a result, the 0.3 % Ti-doped sample showed a dynamic range between 0.1 and 1000 mGy, reusability, and fading of 10–30 % for a week.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108013"},"PeriodicalIF":3.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306662","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}

{"title":"Structure and magnetodielectric properties of HDPE/GaFeO3 composites","authors":"Zamzama Rahmany,&nbsp;C.K. Divya Krishnan,&nbsp;S. Savitha Pillai","doi":"10.1016/j.solidstatesciences.2025.108010","DOIUrl":"10.1016/j.solidstatesciences.2025.108010","url":null,"abstract":"<div><div>We studied the structure and magnetoelectric properties of HDPE/GFO composites with different GFO weight percentages. The XRD pattern of HDPE was indexed with orthorhombic structure space group Pnam, and the XRD pattern of GFO matches the Trigonal structure space group <span><math><mrow><mi>R</mi><mover><mn>3</mn><mo>‾</mo></mover><mi>c</mi></mrow></math></span>. The XRD pattern of composites shows the presence of both phases. Raman and IR studies confirmed the presence of functional group absorption bands corresponding to HDPE and GFO in the composite system. Structural analysis confirms that nanoparticle agglomeration within the matrix is likely to occur at filler concentrations above 5 %. GFO nanoparticle incorporation is confirmed from fractured micrographs of SEM images. The field-dependant magnetization data show a clear hysteresis loop at room temperature, indicating weak ferrimagnetic properties for composite samples, the maximum magnetic moment observed for 5 % filler concentration. The frequency-dependent dielectric constant increases with an increase in filler content. Ferroelectric data confirms the room temperature ferroelectricity in the composite samples and polarization increases with filler loading. Magnetodielectric studies confirmed the presence of a coupling between the magnetic and dielectric properties of the composite.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108010"},"PeriodicalIF":3.4,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298137","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}

{"title":"Z-scheme CuO/NCN nanomaterials for rapid fluorescence detection and photocatalytic degradation of levofloxacin","authors":"Qi Guo ,&nbsp;Xiaoling Liu ,&nbsp;Meng Wen ,&nbsp;Haijuan Zhan ,&nbsp;Heping Li ,&nbsp;Jing-xin Ma ,&nbsp;Wanyi Liu","doi":"10.1016/j.solidstatesciences.2025.108005","DOIUrl":"10.1016/j.solidstatesciences.2025.108005","url":null,"abstract":"<div><div>Z-scheme CuO/NCN heterojunction nanomaterials have been successfully synthesised by loading copper oxide on g-C₃N₄ modified with NCDs (NCN). The material detects and photocatalytically degrades levofloxacin (LOFL) in aqueous solution by fluorescence “turn on”. CuO/NCN has good sensing performance for LOFL in the range of 0–0.275 mM[R² = 0.9994, detection limit: 0.360 μM (0.143 ppm)]. Through comprehensive tests, it was verified that the fluorescence sensitisation mechanism can be attributed to the combination of IFE and photoinduced electron transfer. Meanwhile, Transfacial electron transport bridges (NCDs) establish double charge transfer pathways that simultaneously accelerate electron flow and Cu(II)/Cu(I) redox cycling in Z-scheme CuO/NCN heterojunctions, resulting in a synergistic photo-Fenton-like system. By constructing CuO/NCN nanomaterials, an integrated solution to treat LOFL contamination in water has been realised, equipped with detection and removal capabilities. This opens up a promising avenue to effectively, rapidly and economically address LOFL contamination in water.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108005"},"PeriodicalIF":3.4,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298136","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}

{"title":"Optimization of thermoelectric properties of n-type Mn- and Te-doped Mg3Sb2-xBix phases","authors":"Trong Phan ,&nbsp;Yu-Chih Tseng ,&nbsp;Yurij Mozharivskyj","doi":"10.1016/j.solidstatesciences.2025.108011","DOIUrl":"10.1016/j.solidstatesciences.2025.108011","url":null,"abstract":"<div><div>This study explores the effects of Mg and Bi amounts, ball milling duration, and sintering conditions on the purity and thermoelectric properties of the Mn- and Te-doped Mg₃Sb_2-<em>x</em>Bi_<em>x</em> phases (Mg_{2.97+<em>y</em>}Mn_0.03Bi_<em>x</em>Sb_{1.99-<em>x</em>}Te_0.01). We found that excess Mg is necessary to achieve phase pure samples, but too much Mg forms impurities that decrease thermoelectric efficiency. Increasing Bi content leads to lower phase stability and decomposition. There is also an optimal ball milling time, beyond which decomposition of the material occurs. The highest figure of merit, zT, of 1.44 was achieved for the Mg_3.27Mn_0.03Bi_1.30Sb_0.69Te_0.01 sample at 623K, which is comparable to the performance of Bi₂Te₃. Our findings suggest that Mg₃Sb_2-<em>x</em>Bi_<em>x</em> phases are promising low-cost and environmentally friendly thermoelectric materials mid-range temperature applications.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108011"},"PeriodicalIF":3.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321725","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}

{"title":"High-performance amorphous silicon - copper composite film anode for lithium-ion batteries with superior cycle stability and conductivity","authors":"Wenyu Zheng ,&nbsp;Haining Wu ,&nbsp;Yajuan Jiang ,&nbsp;Yicong Huang ,&nbsp;Anhong Luo ,&nbsp;Yunyun Zhao ,&nbsp;Kunpeng Jiang ,&nbsp;Huarui Xu ,&nbsp;Guisheng Zhu","doi":"10.1016/j.solidstatesciences.2025.108007","DOIUrl":"10.1016/j.solidstatesciences.2025.108007","url":null,"abstract":"<div><div>With the continuous improvement of performance requirements for lithium-ion batteries, developing a high-volume stable anode has become a research priority. Amorphous silicon as a potential anode material for Li-ion batteries has a high theoretical specific capacity, but suffers from poor electrical conductivity and large volume expansion. Copper is renowned for its remarkable electrical conductivity and robust mechanical strength. Harnessing these exceptional properties, we can effectively improve the performance of silicon anodes. Through the magnetron sputtering method, an amorphous silicon - copper composite film anode has been successfully fabricated.</div><div>As a new type of anode material for lithium-ion batteries, the amorphous silicon-copper composite film has a first coulombic efficiency of 83.30 % at a current density of 420 mA/g and a reversible capacity retention rate of 95.63 % for 100 to 500 cycles. The volume expansion rate after 500 cycles is 176.9 %. The equivalent resistance of the composite film is about 136 Ohms, and the composite film has the advantages of high coulombic efficiency, good cycle stability, and good electrical conductivity, which provides a new idea and way to improve the performance of lithium-ion batteries.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"168 ","pages":"Article 108007"},"PeriodicalIF":3.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321724","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}