Journal of Alloys and Compounds最新文献

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Supramolecular isomeric Co-CPs as saturable absorbers in erbium-doped fiber lasers
IF 6.2 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-18 DOI: 10.1016/j.jallcom.2025.179855
Chenyue Liu, Mengna Ji, Xiaohui Du, Zefei Ding, Yuan Zhao, Pengpeng Wang, Suna Wang, Cunguang Zhu
{"title":"Supramolecular isomeric Co-CPs as saturable absorbers in erbium-doped fiber lasers","authors":"Chenyue Liu, Mengna Ji, Xiaohui Du, Zefei Ding, Yuan Zhao, Pengpeng Wang, Suna Wang, Cunguang Zhu","doi":"10.1016/j.jallcom.2025.179855","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.179855","url":null,"abstract":"Metal-organic frameworks (MOFs) are notable for their tunable pore structures, high surface areas, and diverse optical properties, making them promising candidates for ultrashort pulsed laser applications. In this study, we synthesized two MOF materials, {[Co<sub>2</sub>(L)(dmbpy)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>]·DMF}<sub>n</sub> (referred to as CoCP-1) and {[Co(L)<sub>0.5</sub>(dmbpy)(H<sub>2</sub>O)]·0.5H<sub>2</sub>O·0.75DMF}<sub>n</sub> (referred to as CoCP-2), with similar one-dimensional chain structures, using an F-containing tetracarboxylic acid ligand. Despite the similarity in their chain structures, variations in the bending of the aromatic ring linkages result in the formation of distinct supramolecular architectures. In our experimental investigation, CoCP-1 showed a relatively higher modulation depth of 12.57% and a saturation intensity of 77.03<!-- --> <!-- -->MW/cm², while CoCP-2 exhibited a modulation depth of 9.82% and a saturation intensity of 59.28<!-- --> <!-- -->MW/cm². Upon integration into an erbium-doped fiber laser system, both materials demonstrated the capability to generate stable mode-locked and Q-switched mode-locked (QML) pulses. At a pump power of 193<!-- --> <!-- -->mW, the CoCP-1-based fiber laser generated a fundamental mode-locked pulse with a pulse width of 1.19<!-- --> <!-- -->ps and a repetition rate of 4.363<!-- --> <!-- -->MHz. In comparison, the CoCP-2-based fiber laser achieved a 1.16<!-- --> <!-- -->ps pulse width with a repetition rate of 4.407<!-- --> <!-- -->MHz. As pump power increased, QML pulses emerged in both systems. Both systems maintained an SNR above 45<!-- --> <!-- -->dB for QML pulses. This work demonstrates that CoCP-1 and CoCP-2 possess outstanding optical properties, broadening the application scope of MOFs. These findings offer new insights and possibilities for designing and optimizing saturable absorbers in nonlinear optics and ultrashort pulsed laser technology.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"12 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel strategy synergistically enhances the strength and ductility of Mg-Gd-Zr alloys by tailoring a heterogeneous structure
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179782
Jianxin Zhou , Hong Yang , Wenlong Xie , Ying Zhang , Yuyang Gao , Zhihua Dong , Bin Jiang , Fusheng Pan
{"title":"A novel strategy synergistically enhances the strength and ductility of Mg-Gd-Zr alloys by tailoring a heterogeneous structure","authors":"Jianxin Zhou ,&nbsp;Hong Yang ,&nbsp;Wenlong Xie ,&nbsp;Ying Zhang ,&nbsp;Yuyang Gao ,&nbsp;Zhihua Dong ,&nbsp;Bin Jiang ,&nbsp;Fusheng Pan","doi":"10.1016/j.jallcom.2025.179782","DOIUrl":"10.1016/j.jallcom.2025.179782","url":null,"abstract":"<div><div>We introduced an innovative methodology employing the high shearing dispersion technique (HSDT) to uniformly distribute Zr particles, creating a heterogeneous structure with more and finer fine-grained regions after extrusion, which enhanced the strength and ductility synergistically in Mg-3Gd-1Zr (VK31) alloys. Compared to non-high sheared VK31 (NHS-VK31) alloy, the high sheared VK31 (HS-VK31) alloy exhibited a 30 MPa increase in yield strength and a 7.9 % improvement in elongation. HSDT applied before solidification effectively dispersed and refined Zr particles, suppressed dynamic recrystallization nucleation and growth during extrusion, which contributing to the development of heterogeneous structures. The finer average grain size of the HS-VK31 alloy (3.64 μm) was a key factor in the strength increase compared to the NHS-VK31 alloy (8.09 μm). During deformation of the HS-VK31 alloy, the more numerous and finer grains in fine-grained regions created favorable conditions for the activation of &lt;c+a&gt; dislocations, which were easily decomposed into partial dislocations (&lt;c&gt; dislocations and &lt;a&gt; dislocations) and stacking faults. The activation of high-density non-basal dislocations and stacking faults in the fine-grained zones was primarily responsible for the improvement of ductility. Additionally, the more dispersed and finer Zr particles in HS-VK31 alloy could effectively alleviate stress concentration, preventing the deterioration of ductility. This work presented an advanced design paradigm for heterogeneous structures, providing novel insights and perspectives for the evolution of strength-ductility synergy in alloy development.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179782"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143635559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetodielectric property and photocatalytic activity for toxic dye degradation of Bi(Gd)Fe(Ni)O3 nanomaterials
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179821
Gayatree Mandal , M.N. Goswami , P.K. Mahapatra
{"title":"Magnetodielectric property and photocatalytic activity for toxic dye degradation of Bi(Gd)Fe(Ni)O3 nanomaterials","authors":"Gayatree Mandal ,&nbsp;M.N. Goswami ,&nbsp;P.K. Mahapatra","doi":"10.1016/j.jallcom.2025.179821","DOIUrl":"10.1016/j.jallcom.2025.179821","url":null,"abstract":"<div><div>The Bi<sub>1-<em>x</em></sub>Gd<sub><em>x</em></sub>Fe<sub>1-<em>y</em></sub>Ni<sub><em>y</em></sub>O<sub>3</sub> (<em>x</em> = 0.00, 0.09; <em>y</em> = 0.00, 0.03, 0.06, 0.09 &amp; 0.12) nanomaterials have been synthesized through the chemical route via solvothermal technique and the structural, morphology, chemical compositions, dielectric, optical, and photocatalytic properties of the samples are studied. The primary rhombohedral crystalline symmetry of R3c space group of all the synthesized nanomaterials has been confirmed from the Rietveld refinement analysis of X-ray diffraction (XRD) data. Field emission scanning electron microscopy (FESEM) micrographs of synthesized nanomaterials show the change in grain structure for doped samples from pure BFO. The stoichiometric quantity of elemental compositions in pure and doped-BFO nanomaterials has been obtained from the Energy Dispersive X-ray Spectroscopy (EDX) analysis. The absorption bands at room temperature in all the samples have been studied using Fourier-transform infrared spectroscopy (FTIR). The impact of microstructural grain and grain boundary on the electrical response of the samples has been estimated through the analysis of impedance data. The co-doped samples exhibit improved electric polarization value. The magnetoelectric coefficient, obtained from the measurement of magnetodielectric characteristics, is found to increase by more than two times in the highest concentration co-doped samples compared to that of the pure BFO. The band gap energy of prepared nanoparticles has been measured using UV–Vis spectroscopy at room temperature. The photocatalytic effect of methylene blue (MB) dye degradation with time has been recorded under sunlight irradiation. The total dye degradation efficiency and rate doubles for the highest concentration co-doped nanoparticles than that of pure BFO.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179821"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and characterization of (Fe0.2Ni0.2Co0.2Al0.2Zn0.2)3O4 high entropy oxide as electrocatalyst for oxygen evolution reaction
IF 6.2 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179776
Gabriel D.S. Vasconcelos, Rafael A. Raimundo, Maria J.S. Lima, Kivia F. Galvão, Matheus D. da Silva, Daniel A. Macedo, Meysam M. Karimi, Raquel Checca Huaman, Pedro Lana Gastelois, Uílame U. Gomes, Marco A. Morales
{"title":"Synthesis and characterization of (Fe0.2Ni0.2Co0.2Al0.2Zn0.2)3O4 high entropy oxide as electrocatalyst for oxygen evolution reaction","authors":"Gabriel D.S. Vasconcelos, Rafael A. Raimundo, Maria J.S. Lima, Kivia F. Galvão, Matheus D. da Silva, Daniel A. Macedo, Meysam M. Karimi, Raquel Checca Huaman, Pedro Lana Gastelois, Uílame U. Gomes, Marco A. Morales","doi":"10.1016/j.jallcom.2025.179776","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.179776","url":null,"abstract":"In this work, the high entropy oxide (HEO) (Fe<sub>0.2</sub>Ni<sub>0.2</sub>Co<sub>0.2</sub>Al<sub>0.2</sub>Zn<sub>0.2</sub>)<sub>3</sub>O<sub>4</sub> was synthesized at 600 ºC (labeled as HEO-600) by sol-gel method assisted with polyvinylpyrrolidone (PVP). Additional samples were produced at higher temperatures and the spinel and rock-salt high entropy oxides were formed. The characterizations were carried out by XRD, EDS, XPS, TEM, Mössbauer spectroscopy, AC and DC magnetometry, UV-vis, FTIR, and electrochemical experiments. For sample HEO-600, the XPS analysis confirmed the equimolar composition of the sample. The EDS results showed homogeneous distribution of the cations within the sample. The TEM showed non-aggregated particles with size of 9.2<!-- --> <!-- -->nm. The sample had superparamagnetic behavior at room temperature. The Mössbauer results showed Fe occupancies in the A and B sites of 43 and 57%, evidencing the formation of a partial inverse spinel. The DC and AC susceptibility data showed the presence of a spin glass phase with onset at 206<!-- --> <!-- -->K, this magnetic phase was wiped under a field of about 4300<!-- --> <!-- -->Oe. The electrochemical characterization showed the ability of this sample for oxygen evolution reaction applications. The HEO-600 sample showed overpotential of 358<!-- --> <!-- -->mV at 10<!-- --> <!-- -->mA<!-- --> <!-- -->cm<sup>-2</sup>. This work brings new developments in the understanding of high entropy oxides and provides a useful application as an electrocatalyst in OER processes.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"24 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exceptional strength-ductility synergy in hyper-eutectic Al19Fe20Co20Ni37.5Mo3Ta0.5 high entropy alloy with heterogeneous structure
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179751
Naqash Ali , Mingliang Wang , Tao He , Abdukadir Amar , Yiping Lu , Ismail Shahid , Tongmin Wang
{"title":"Exceptional strength-ductility synergy in hyper-eutectic Al19Fe20Co20Ni37.5Mo3Ta0.5 high entropy alloy with heterogeneous structure","authors":"Naqash Ali ,&nbsp;Mingliang Wang ,&nbsp;Tao He ,&nbsp;Abdukadir Amar ,&nbsp;Yiping Lu ,&nbsp;Ismail Shahid ,&nbsp;Tongmin Wang","doi":"10.1016/j.jallcom.2025.179751","DOIUrl":"10.1016/j.jallcom.2025.179751","url":null,"abstract":"<div><div>Eutectic high entropy alloys (EHEAs) characterized by dual-phase lamellar FCC/B2 structures represent a promising class of materials combining the advantages of both high entropy alloys (HEAs) and conventional eutectic alloys. Nevertheless, the mechanical properties of EHEAs have yet to fully meet the desired performance criteria. In particular, achieving both high strength and substantial plasticity remains a serious challenge, as these two properties are typically difficult to reconcile in most metallic materials. Herein, a hyper-eutectic Al<sub>19</sub>Fe<sub>20</sub>Co<sub>20</sub>Ni<sub>37.5</sub>Mo<sub>3</sub>Ta<sub>0.5</sub> HEA comprising the face centered cubic (FCC) and ordered body centered cubic (B2) phases was fabricated with outstanding mechanical properties. Thermo-mechanical processing (TMP) followed by annealing at 900 ºC and 1000 ºC induced formation of ordered and topologically close-packed (TCP) nano-precipitates in this dual-phase HEA. The annealing at 900 ºC, and 1000 ºC led to the heterogeneous microstructures, including dominant FCC and B2 phases sharing Kurdjumov-Sachs (K-S) orientation relationship, along with the different precipitation behavior in both HEAs. After annealing at 900 ºC, the formation of coherent L1<sub>2</sub> nano-precipitates in the FCC matrix, and nano-sized µ phase particles within the B2 matrix contributed to the remarkable strength (1609 MPa) and ductility (12 %). After annealing at 1000 ºC, the strength was decreased to 1452 MPa while ductility was increased to 19 %. Moreover, the L1<sub>2</sub> and µ phase nano-precipitates dissolved within the matrix phases, and B2 nano-precipitates formed within the FCC matrix, exhibiting Nishiyama-Wassermann (N-W) orientation relationship. The considerable mechanical properties of both HEAs are attributed to the synergistic reinforcement provided by the interface and the presence of multiple nano-precipitates within the dual-phase matrix, which further activated the multiple strengthening mechanisms. We believe that these findings will offer valuable guidance for the design of precipitation strengthened HEAs with exceptional mechanical properties.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179751"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tailoring the structure and properties of Fe-based amorphous ribbons via melt temperature
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179808
Suo Zhang , Dengfeng Wang , Tan Wang , Shaojie Wu , Fushan Li
{"title":"Tailoring the structure and properties of Fe-based amorphous ribbons via melt temperature","authors":"Suo Zhang ,&nbsp;Dengfeng Wang ,&nbsp;Tan Wang ,&nbsp;Shaojie Wu ,&nbsp;Fushan Li","doi":"10.1016/j.jallcom.2025.179808","DOIUrl":"10.1016/j.jallcom.2025.179808","url":null,"abstract":"<div><div>In the present study, the structure and properties of Fe<sub>78</sub>Si<sub>9</sub>B<sub>13</sub> amorphous ribbons produced in an industrial production process at casting temperatures of 1500, 1450, and 1350 ℃ were investigated. The analysis focused on surface morphology, microstructure, thermal stability, and magnetic anisotropy. The results showed that, compared to the amorphous ribbon produced at 1350 ℃, the ribbon fabricated at 1500 ℃ exhibited smoother edges, smaller thickness variation, higher thermal stability, a more uniform microstructure, and superior magnetic properties. This phenomenon could be attributed to the more uniform melt structure at higher temperatures, leading to a more homogeneous amorphous ribbon during the cooling process. A higher melt temperature enhanced the fluidity of the melt, promoting the formation of a sufficient molten pool and reducing fluctuations within the pool. A high melt temperature inhibited the precipitation of nanoclusters in the amorphous ribbons, improved atomic spacing, and enhanced atomic motion. The reduced coercivity and core loss were due to the significant decrease in interlayer eddy current losses, which resulted in excellent surface morphology. The enhanced melt fluidity at higher melt temperatures facilitated the thickness distribution of the amorphous ribbon, leading to a smoother surface morphology, consequently, superior soft magnetic properties.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179808"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scanning thermal failure microscopy of multilayer ceramic capacitors
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179878
Wentong Du , Cheng Yi , Kaimin Du , Kunyu Zhao , Faqiang Zhang , Guorong Li , Zhifu Liu , Huarong Zeng
{"title":"Scanning thermal failure microscopy of multilayer ceramic capacitors","authors":"Wentong Du ,&nbsp;Cheng Yi ,&nbsp;Kaimin Du ,&nbsp;Kunyu Zhao ,&nbsp;Faqiang Zhang ,&nbsp;Guorong Li ,&nbsp;Zhifu Liu ,&nbsp;Huarong Zeng","doi":"10.1016/j.jallcom.2025.179878","DOIUrl":"10.1016/j.jallcom.2025.179878","url":null,"abstract":"<div><div>A high resolution scanning thermal failure microscopy (STFM) was developed based on the commercial atomic force microscopy and used for local heating, local aging of the dielectric layers, and characterizing local electrical reliability and local thermal strains of Multilayer ceramic capacitors (MLCCs). An unusual zigzag leakage current behavior was clearly observed in MLCCs by the STFM approach, which is ascribed to the oxygen vacancy migration across local dozens of grains in the dielectric layers of MLCC during local highly accelerated lifetime test processing. Local thermal strain patterns induced by local AC heating were clearly visible in the dielectric layers of MLCCs. STFM provides an important, promising approach for local failure studies of MLCCs, undoubtedly enrich our insights to the nanoscale electrical degradation behaviors.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179878"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation of transparent AT@TiO2/ organosilicone resin coating and its thermal insulation properties
IF 6.2 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179781
Ying Zhang, Yuanqing Chen, Shufeng Li, Weibai Bian
{"title":"Preparation of transparent AT@TiO2/ organosilicone resin coating and its thermal insulation properties","authors":"Ying Zhang, Yuanqing Chen, Shufeng Li, Weibai Bian","doi":"10.1016/j.jallcom.2025.179781","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.179781","url":null,"abstract":"Spherical hollow two-component antimony doped tin oxide/titanium dioxide (AT@TiO<sub>2</sub>) microspheres with uniform size (~280<!-- --> <!-- -->nm) were prepared by a two-step hydrothermal method. The morphology, crystal structure and microstructure of hollow AT @TiO<sub>2</sub> microspheres were characterized using XRD, SEM, EDS and HRTEM. By adding different contents of hollow AT@ TiO<sub>2</sub> into the organosilicone resin matrix, the composite coating was prepared on glass with an anti-reflective MgF<sub>2</sub> layer. The optical and thermal insulation properties of the composite coatings were studied. The light transmission of AT@TiO<sub>2</sub>/Organosilicone resin on MgF<sub>2</sub> coated glass can reach ~80%, when the content of the hollow AT @TiO<sub>2</sub> microspheres was controlled at 1.5<!-- --> <!-- -->wt.%. Moreover, the coating of AT@ TiO<sub>2</sub>/ Organosilicone resin on MgF<sub>2</sub> coated glass can lower the indoor temperature of a self-made incubator by 11.25℃. The prepared AT@TiO<sub>2</sub>/Silicone resin coating on MgF<sub>2</sub> coated glass show a great potential in the application of energy saving.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"18 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143635556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bismuth-activated luminescence reversible modification of photochromic for multimodal anti-counterfeiting and optical storage application
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179812
Rongbo Ma , Xinyong Gong , Chaoyong Deng , Weichao Huang
{"title":"Bismuth-activated luminescence reversible modification of photochromic for multimodal anti-counterfeiting and optical storage application","authors":"Rongbo Ma ,&nbsp;Xinyong Gong ,&nbsp;Chaoyong Deng ,&nbsp;Weichao Huang","doi":"10.1016/j.jallcom.2025.179812","DOIUrl":"10.1016/j.jallcom.2025.179812","url":null,"abstract":"<div><div>Multifunctional luminescence material with photochromism and controllable luminescence modulation properties have attracted increasing interest, enabling innovative applications such as optical information storage and anti-counterfeiting. Herein, the Bi<sup>3</sup><sup>+</sup> single-doped BaSrY<sub>4</sub>O<sub>8</sub> photochromic phosphor was prepared by the solid-state reaction method, and its crystal structure and optical properties were systematically investigated. Notably, this phosphor demonstrates reversible photochromic properties, accompanied by a rapid transition in body color from white to brown when exposed to 365 nm near-UV light, and considerable recovery capacity upon blue light (450 nm) irradiation. By the combination of photoluminescence and reversible photochromism, the application of optical memory and anti-counterfeiting is developed that depends on the different light stimulations. Moreover, the BaSrY<sub>4</sub>O<sub>8</sub>: Bi<sup>3+</sup> phosphor exhibits an intense blue broadband emission centered at 423 nm and good thermal stability (83 %@423 K). These results indicate that BaSrY<sub>4</sub>O<sub>8</sub>: Bi<sup>3+</sup> phosphor is a promising multifunctional luminescence material for applications in optical storage and anti-counterfeiting.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179812"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143639964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photoinduced deposition of cubic Pd on the edge active sites of BiOCl to enhance photocatalytic CO2 reduction performance
IF 5.8 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-03-17 DOI: 10.1016/j.jallcom.2025.179865
Yuping Sun , Qianqian Heng , Xin Wang , Yuhui Cao , Xiu Zhang , Dan Zhao , Wei Chen
{"title":"Photoinduced deposition of cubic Pd on the edge active sites of BiOCl to enhance photocatalytic CO2 reduction performance","authors":"Yuping Sun ,&nbsp;Qianqian Heng ,&nbsp;Xin Wang ,&nbsp;Yuhui Cao ,&nbsp;Xiu Zhang ,&nbsp;Dan Zhao ,&nbsp;Wei Chen","doi":"10.1016/j.jallcom.2025.179865","DOIUrl":"10.1016/j.jallcom.2025.179865","url":null,"abstract":"<div><div>BiOCl photocatalytic materials were prepared using a hydrothermal method, and the cubic Pd was loaded on the active edge sites of BiOCl using a photoinduced deposition method to enhance photocatalytic CO<sub>2</sub> reduction. The photoelectrochemical tests demonstrate that the cubic Pd cocatalyst loaded on the edge active sites improves the charge separation ability and facilitates the activation of CO<sub>2</sub> molecules. Benefiting from the strong proton adsorption capacity of Pd, the CH<sub>4</sub> evolution rate of 0.3 % Pd/BiOCl reaches 0.16 μmol∙g<sup>−1</sup>∙h<sup>−1</sup>, which is 11.3 times higher than that of BiOCl. According to <em>in-situ</em> DRIFT analysis, after loading the Pd cocatalyst, CO* does not directly form CO, but forms intermediates such as CHO* and CH<sub>3</sub>*, thereby suppressing the formation of CO and improving the selectivity for CH<sub>4</sub> production. This work helps to understand the mechanism of CO<sub>2</sub> reduction and provides ideas for regulating the selectivity of CO<sub>2</sub> reduction.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1022 ","pages":"Article 179865"},"PeriodicalIF":5.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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