Solid State Sciences最新文献_第6页

Temperature-dependent photocatalytic activity and emergence of weak ferromagnetism in cobalt-incorporated ZnSe quantum dots

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.solidstatesciences.2025.107827

Nur Jalal Mondal , Mritunjoy Prasad Ghosh , Rahul Sonkar , Samir Thakur , Eeshankur Saikia , Devasish Chowdhury

{"title":"Temperature-dependent photocatalytic activity and emergence of weak ferromagnetism in cobalt-incorporated ZnSe quantum dots","authors":"Nur Jalal Mondal , Mritunjoy Prasad Ghosh , Rahul Sonkar , Samir Thakur , Eeshankur Saikia , Devasish Chowdhury","doi":"10.1016/j.solidstatesciences.2025.107827","DOIUrl":"10.1016/j.solidstatesciences.2025.107827","url":null,"abstract":"<div><div>Impacts of reaction temperature on the photocatalytic effect of Co-doped ZnSe quantum dots (QDs) have been discussed thoroughly in this article. In this regard, Co<sub>x</sub>Zn<sub>1-x</sub>Se (x = 0.00, 0.03, and 0.06 wt %) QDs were synthesized using a typical hydrothermal method to provide an easier, workable, affordable way to remove antibiotic pollutants from wastewater. Doping of magnetic impurities (Co<sup>2+</sup> ions) in ZnSe QDs transformed the systems into diluted magnetic semiconductors and a signature of weak ferromagnetic behavior was registered at ambient temperature. Therefore, the genesis of weak ferromagnetism in doped systems has also been studied using DFT calculations to flourish their potential use for spintronic devices. Incorporation of cobalt ions introduced weak ferromagnetic signature at 300 K in doped ZnSe QDs, which is ascribed to the p-d hybridization as given by the DFT calculations. Photocatalytic degradation of ciprofloxacin (CIP) antibiotic agent was studied thoroughly by varying pH, temperature and the dosages of doped ZnSe nanocatalysts. It was found that 6 % cobalt-doped ZnSe QDs showed relatively better efficiency and rate constant in degrading CIP. With the increase in temperature (up to 70 <strong>°</strong>C), a significant increment in both the reaction rate and efficacy was observed for the highest Co-content ZnSe nanocatalysts. These results indicated that the photocatalytic efficiency of the catalyst was affected by the reaction temperature. It should be highlighted that cobalt-doped ZnSe QDs are qualified for efficient nanosized photocatalysts in addition to being competent dilute magnetic semiconductors.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107827"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149346","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}

引用次数: 0

Adsorption and reduction of Cr(VI) by C-P-O groups in biochar: Performance and mechanisms

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.solidstatesciences.2024.107815

Xian Xiao , Feiyan Zhou , Chenyu Yang , Lun Lu , Yuan Zhao , Baohua Tu , Liangzhong Li

{"title":"Adsorption and reduction of Cr(VI) by C-P-O groups in biochar: Performance and mechanisms","authors":"Xian Xiao , Feiyan Zhou , Chenyu Yang , Lun Lu , Yuan Zhao , Baohua Tu , Liangzhong Li","doi":"10.1016/j.solidstatesciences.2024.107815","DOIUrl":"10.1016/j.solidstatesciences.2024.107815","url":null,"abstract":"<div><div>Applying agricultural and industrial wastes into solid functional adsorbents for environmental remediation of heavy metal pollution remains a challenge. Herein, an efficient alkaline-pretreated H<sub>3</sub>PO<sub>4</sub>-modified cotton straw biochar (PCS) was developed to remove Cr(VI) by adsorption and reduction. Detailed characterization demonstrated that PCS has a substantial specific surface area (301.6 m<sup>2</sup> g<sup>−1</sup>) and C-P-O groups (not in pristine biochar). Adsorption experiments were better described by pseudo-second-order and Langmuir model, which indicated that the adsorption followed the physicochemical diffusive monolayer adsorption mechanism. According to the alkaline extraction method and X-ray photoelectron spectroscope (XPS) analysis, the C-P-O groups on PCS participated in the adsorption of Cr(VI), converting 20.2 % of it to Cr(III). The remarkable adsorption capacity of PCS was 138.9 mg g<sup>−1</sup>, mainly attributed to pore filling, electrostatic attraction, complexation, and reduction. The PCS exhibited strong tolerance in common anionic and different water matrices and had the potential for practical application. The above findings can provide decision-making for the remediation of chromium-containing wastewater, as well as for the production of solid functional adsorbents in industry and agriculture.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107815"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097741","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}

引用次数: 0

Effect of proton-exchange reactions on the ionic conductivity of Li29-3xAlxZr9Nb3O40, an ordered rock-salt oxide

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.solidstatesciences.2024.107810

Satoshi Sugiyanagi, Yasuaki Matsuda

{"title":"Effect of proton-exchange reactions on the ionic conductivity of Li29-3xAlxZr9Nb3O40, an ordered rock-salt oxide","authors":"Satoshi Sugiyanagi, Yasuaki Matsuda","doi":"10.1016/j.solidstatesciences.2024.107810","DOIUrl":"10.1016/j.solidstatesciences.2024.107810","url":null,"abstract":"<div><div>Li<sub>29-3<em>x</em></sub>Al<sub><em>x</em></sub>Zr<sub>9</sub>Nb<sub>3</sub>O<sub>40</sub>, an ordered rock-salt oxide, was synthesized by a two-step solid-state method, and sintered bodies with relative densities of approximately 90 % were obtained. The sample with <em>x</em> = 0 exhibited a conductivity of 1.5 × 10<sup>−4</sup> Scm<sup>−1</sup> at 500 °C, with an activation energy of 0.99 eV, and lithium conductivity showed no improvement by Al<sup>3+</sup> substitution. After exposing Li<sub>29</sub>Zr<sub>9</sub>Nb<sub>3</sub>O<sub>40</sub> to a humidified atmosphere, its surface became strongly alkaline and the lattice constant changed, indicating the formation of lithium hydroxide on the surface by the exchange reaction between Li<sup>+</sup> and H<sup>+</sup> in water vapor. The sample exposed to a humidified atmosphere for 1 week exhibited a high conductivity of 4.6 × 10<sup>−3</sup> Scm<sup>−1</sup> at 25 °C, which decreased to 1.75 × 10<sup>−6</sup> Scm<sup>−1</sup> at 150 °C. Our results indicate the occurrence of fast ion diffusion at the surface of the ordered rock-salt phase.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107810"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098236","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}

引用次数: 0

Boron nitride nanotubes embedded nylon-6 nanofibers composites for space applications

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-02-01 DOI: 10.1016/j.solidstatesciences.2024.107819

Numan Yanar , Arni G. Pornea , Duy Khoe Dinh , Changho Kim , Eunkwang Park , Jae-Hak Choi , Jaewoo Kim

{"title":"Boron nitride nanotubes embedded nylon-6 nanofibers composites for space applications","authors":"Numan Yanar , Arni G. Pornea , Duy Khoe Dinh , Changho Kim , Eunkwang Park , Jae-Hak Choi , Jaewoo Kim","doi":"10.1016/j.solidstatesciences.2024.107819","DOIUrl":"10.1016/j.solidstatesciences.2024.107819","url":null,"abstract":"<div><div>In this article, the enhancement of thermal and mechanical properties, and the moisture resistance of nylon-6 nanofiber fabrics for the space application such as the astronaut suits by compounding boron nitride nanotubes (BNNT) is investigated. For the proposed application, BNNT are first surface modified through the wrapping of nanotubes with Sodium Dodecyl Sulfate (SDS) for enabling the dispersion of BNNT in nylon-6 matrix, then the nylon-6 nanofiber fabrics compounded with SDS modified 2.5 wt% (BNNT2.5), 5.0 wt% (BNNT5.0), 7.5 wt% (BNNT7.5), 10.0 wt% (BNNT10.0) of BNNT are fabricated through electrospinning. Among these samples, BNNT5.0 shows the ultimate performance with its mechanical performance by having the tensile strength of 12.41 MPa and 35 % elongation performance which is 340 % higher tensile strength than neat nylon-6 sample and 152 % higher tensile strength than neat nylon-6 sample having SDS additive (Neat). BNNT5.0 also shows higher water contact angle (86.56°) than Neat (71.38°) proving the enhanced moisture resistance. In terms of thermal performance, BNNT5.0 shows 32 % enhanced thermal conductivity (0.434 W/mK) compared to Neat (0.296 W/mK), and a superior thermal stability showing shrinking resistance at elevated temperatures as high as 200 °C while Neat melts down at same temperature. Finally, BNNT5.0 also shows rapid cooling performance which two times higher than Neat according to the infrared imaging for cooling from 60 °C to room temperature. Consequently, we expect BNNT may provide lighter and robust feasibility for the conventional nylon-6 nanofibers to be used for the astronaut suits.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107819"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098788","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}

引用次数: 0

Formation mechanism and magnetic properties of ferrite composite tubular microstructures

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-01-31 DOI: 10.1016/j.solidstatesciences.2025.107852

Yaqi Jiang , Jiaqi Feng , Guoqing Liu , Zixuan Chen , Qin Xu , Peipei Lu , Junmeng Zhang , Guangyu Wen , Lihu Liu , Huiyuan Sun

{"title":"Formation mechanism and magnetic properties of ferrite composite tubular microstructures","authors":"Yaqi Jiang , Jiaqi Feng , Guoqing Liu , Zixuan Chen , Qin Xu , Peipei Lu , Junmeng Zhang , Guangyu Wen , Lihu Liu , Huiyuan Sun","doi":"10.1016/j.solidstatesciences.2025.107852","DOIUrl":"10.1016/j.solidstatesciences.2025.107852","url":null,"abstract":"<div><div>Changes in the morphology of FeNi alloy nanowires during annealing at different temperatures were studied by transmission electron microscopy. In this work, kinds of morphologies including composite oxide wire/tube, wire@tube (or core-shell) and pure tubular microstructures were obtained successfully. The structure can be tuned by changing the annealing temperature. The formation mechanism was discussed in detail based on ion diffusion and Kirkendal effect. The as-prepared and annealed samples were characterized by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and EDS mapping, respectively. The material composition of the nanostructures with different morphologies was further determined, and the cation diffusion mechanism was deduced. The result of magnetic measurement showed the coercivity and squareness of the nanostructures perpendicular to the AAO film surface decrease with the increase of annealing temperature, and the hysteresis loop of the sample annealed at high temperature is in a wasp-waist shape, which is consistent with the result that the sample contains multiple magnetic phases. Obviously, the present ferrite heterogeneous composite microstructures have potential application as a multifunctional magnetic material.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107852"},"PeriodicalIF":3.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350313","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}

引用次数: 0

Evaluating chemical states in a single microcrystal of chromium boride with the micro-focused ion and quantum beams

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-01-30 DOI: 10.1016/j.solidstatesciences.2025.107838

Yanze Guan , Xiaoni Zhang , Masashige Miyamoto , Yuki Tsujikawa , Kunio Yubuta , Masafumi Horio , Hironari Isshiki , Jun-ichi Yamaura , Tadashi Abukawa , Fumio Komori , Iwao Matsuda

{"title":"Evaluating chemical states in a single microcrystal of chromium boride with the micro-focused ion and quantum beams","authors":"Yanze Guan , Xiaoni Zhang , Masashige Miyamoto , Yuki Tsujikawa , Kunio Yubuta , Masafumi Horio , Hironari Isshiki , Jun-ichi Yamaura , Tadashi Abukawa , Fumio Komori , Iwao Matsuda","doi":"10.1016/j.solidstatesciences.2025.107838","DOIUrl":"10.1016/j.solidstatesciences.2025.107838","url":null,"abstract":"<div><div>We present a series of procedures that prepared and analyzed chromium borides (Cr-B) microcrystals using a combination of micro-focused ion and quantum beam techniques. The chemical state analyses were carried out using micro-photoemission spectroscopy and structural analyses were performed using micro-reflection high-energy electron diffraction and single-crystal X-ray diffraction. This approach successfully identified the existence of CrB<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and Cr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>B<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> phases in a Cr-B microcrystal and also provided detailed chemical state evaluation of Cr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>B<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> phase. Our integration of these techniques enabled to distinguish and evaluate micro-scale phases within complex materials, identifying different phases or unexpected secondary products of microcrystal.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107838"},"PeriodicalIF":3.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143210962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Particle interactions in SrFe12O19/NiFe2O4 magnetic composites: Effect of composition ratios and nickel ferrite size

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-01-25 DOI: 10.1016/j.solidstatesciences.2025.107839

V. Bilovol , M. Sikora , A. Quesada , K. Berent , M. Gajewska

{"title":"Particle interactions in SrFe12O19/NiFe2O4 magnetic composites: Effect of composition ratios and nickel ferrite size","authors":"V. Bilovol , M. Sikora , A. Quesada , K. Berent , M. Gajewska","doi":"10.1016/j.solidstatesciences.2025.107839","DOIUrl":"10.1016/j.solidstatesciences.2025.107839","url":null,"abstract":"<div><div>The magnetic interactions in SrFe<sub>12</sub>O<sub>19</sub>/NiFe<sub>2</sub>O<sub>4</sub> composites have been studied using the component fractions (90/10, 85/15, 80/20, 75/25 wt%) and the size of magnetically soft nickel ferrite particles as variables. It was observed that the greater the amount of nickel ferrite (NFO) in the composites, the stronger the intensity of the dipolar interactions. Reducing the NFO particle size (from 190 nm to about 25 nm) resulted in an improvement in the M<sub>s</sub> and M<sub>r</sub> values of the composite, despite the fact that the M<sub>s</sub> of NFO is smaller than the M<sub>s</sub> of the hexaferrite ancestor (SrM). This fact is attributed to the diffusion of Ni atoms into the SrM lattice as a result of the heat treatment following the mechanosynthesis of the two ferrites, the method of their fine mixing. An increase in the net magnetization of the composite can be explained by the substitution of Fe<sup>3+</sup> ions by Ni<sup>2+</sup> ions in the 4f<sub>1</sub> and/or 4f<sub>2</sub> positions of the SrM lattice. Such an exclusive exchange takes place in the complex system only when small nickel ferrite particles are present in the composite. That is, their reactivity is increased compared to larger ones.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107839"},"PeriodicalIF":3.4,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161578","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}

引用次数: 0

Investigation of vacuum cryodeposited water films capturing carbon monoxide on an optical surface

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-01-22 DOI: 10.1016/j.solidstatesciences.2025.107830

E. Korshikov, A. Aldiyarov, A. Nurmukan, O. Vorobyova, D. Sokolov

{"title":"Investigation of vacuum cryodeposited water films capturing carbon monoxide on an optical surface","authors":"E. Korshikov, A. Aldiyarov, A. Nurmukan, O. Vorobyova, D. Sokolov","doi":"10.1016/j.solidstatesciences.2025.107830","DOIUrl":"10.1016/j.solidstatesciences.2025.107830","url":null,"abstract":"<div><div>In recent years, many researchers have focused on studying interstellar dust and astrophysical ices. These objects are particularly significant because they are key components of the interstellar medium and play a decisive role in the formation of stars and planets. Studies of the properties of vacuum deposited films have expanded our understanding of the processes involved in the formation of clathrates and hydrates in CO and water mixtures, their physical characteristics, and how specific features emerge based on the method of formation. Capturing and storing CO molecules is considered one of the most promising strategies for combating the potential environmental disaster of global warming. The aim of this study was to investigate the IR spectra of thin films composed of a mixture of CO and water created via vapor deposition within the temperature range 11–180 K. Through spectral analysis, the formation of hydrates and clathrates, which are phenomena of interest in modern condensed matter physics, was examined. The research utilized IR spectroscopy methods to study the resulting thin films. During the experiments, CO and gas hydrate structures were formed within the mixture. In these cases, the sublimation temperature of the CO molecules integrated into the hydrate structures was found to be significantly higher than the equilibrium values, whereas the unbound CO molecules sublimated earlier. The results obtained provide further insights into the formation processes of clathrates and hydrates in CO and water mixtures, their physical properties, and the emergence of characteristics depending on the method of formation.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107830"},"PeriodicalIF":3.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161577","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}

引用次数: 0

Self-assembly of polyoxometalate-based metal-organic framework with trefoil sign structural feature as efficient anode for lithium ion batteries

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-01-01 DOI: 10.1016/j.solidstatesciences.2024.107774

Lizhou Wu , Guanghui Yuan , Fangxiong Gao , Xin Qiang , Junfeng Hui , Bin Liu

{"title":"Self-assembly of polyoxometalate-based metal-organic framework with trefoil sign structural feature as efficient anode for lithium ion batteries","authors":"Lizhou Wu , Guanghui Yuan , Fangxiong Gao , Xin Qiang , Junfeng Hui , Bin Liu","doi":"10.1016/j.solidstatesciences.2024.107774","DOIUrl":"10.1016/j.solidstatesciences.2024.107774","url":null,"abstract":"<div><div>To extend the practical applications of polyoxometalates (POMs) based metal–organic frameworks (POMOFs) in the most cut-ting-edge (lithium ion batteries) LIBs, a new crystalline POMOFs, [Ag<sub>6</sub>(H<sub>2</sub>trz)<sub>6</sub>]·[H<sub>4</sub>SiW<sub>12</sub>O<sub>40</sub>]·6H<sub>2</sub>O (SiW<sub>12</sub>-Ag-trz), was successfully synthesized and well characterized in the work. Crystal analysis reveals that Keggin-typed POMs [H<sub>4</sub>SiW<sub>12</sub>O<sub>40</sub>] (SiW<sub>12</sub>) are inserted into the Ag-trz helical chain to construct 3D POMOFs with open pore channels with trefoil sign structural feature, in which SiW<sub>12</sub> polyoxoanion exhibiting the most diverse coordination modes in the reported crystalline POMOFs, to the best our knowledge. Because the pore channels facilitate the storage and release of lithium ions, and the SiW<sub>12</sub> polyoxoanion growing on the framework serves as an excellent electron sponge, crystalline SiW<sub>12</sub>-Ag-trz as an anode material for lithium-ion batteries (LIBs) exhibits highly reversible capacity and rate capability. Moreover, to illustrate the lithium storage, the impedance spectra and cyclic voltammetry (CV) with different scan rates during the first and 50th charge process were studied in details.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"159 ","pages":"Article 107774"},"PeriodicalIF":3.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147208","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}

引用次数: 0

Enhanced thermoelectric properties in Bi2Sr2-xBaxCo2Oy via doping and texturing for integration in more efficient thermoelectric generators

IF 3.4 3区化学

Solid State Sciences Pub Date : 2025-01-01 DOI: 10.1016/j.solidstatesciences.2024.107772

Pınar Özkurt , M.A. Madre , Berdan Özkurt , M.A. Torres , A. Sotelo

{"title":"Enhanced thermoelectric properties in Bi2Sr2-xBaxCo2Oy via doping and texturing for integration in more efficient thermoelectric generators","authors":"Pınar Özkurt , M.A. Madre , Berdan Özkurt , M.A. Torres , A. Sotelo","doi":"10.1016/j.solidstatesciences.2024.107772","DOIUrl":"10.1016/j.solidstatesciences.2024.107772","url":null,"abstract":"<div><div>Bi<sub>2</sub>Sr<sub>2-x</sub>Ba<sub>x</sub>Co<sub>2</sub>O<sub>y</sub> (0 ≤ x ≤ 0.15) thermoelectric samples have been sintered, and textured through the laser floating zone process using a Nd:YAG laser. Powder XRD studies showed that the thermoelectric phase is the major one in all cases, with higher amount of secondary phases in the textured ones due to their incongruent melting. Microstructural characterization revealed a drastic microstructural modification in the textured samples, when compared to the sintered ones, producing much larger and well oriented grains along the growth direction. These characteristics led to lower electrical resistivity in textured samples, reaching the minimum at 650 °C (14.8 mΩ cm) in 0.125Ba-doped samples, which is lower than those typically reported in this system. On the other hand, no significant variation in Seebeck coefficient has been found between the samples. This behaviour is associated to the isovalent doping which does not modify the charge carrier concentration in the material, and the highest values at 650 °C (166 μV/K) are in the order of the reported in the literature. As a consequence, power factor values are mainly driven by the electrical resistivity values, leading to the highest values at 650 °C in 0.125Ba-doped textured samples (0.19 mW/K<sup>2</sup>m) due to their lowest resistivity. These values are higher than the reported for textured materials and in the order of the best reported for this compound in bulk form. All these properties, together with the possibility of the direct integration of these compounds in thermoelectric modules, make them very attractive for practical applications ensuring access to affordable, reliable, and sustainable energy for all.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"159 ","pages":"Article 107772"},"PeriodicalIF":3.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147207","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}

引用次数: 0