Journal of Alloys and Compounds最新文献_第6页

Li+ induced site occupation engineering in Bi3+ activated spinel-type phosphor for multiple optoelectronic applications

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177763

Shuzeng Zhang, Yang Ding, Teng Zhang, Kangrui Qiang, Pengcheng Wu, Xiaoqian Zhang, Jiasong Zhong

{"title":"Li+ induced site occupation engineering in Bi3+ activated spinel-type phosphor for multiple optoelectronic applications","authors":"Shuzeng Zhang, Yang Ding, Teng Zhang, Kangrui Qiang, Pengcheng Wu, Xiaoqian Zhang, Jiasong Zhong","doi":"10.1016/j.jallcom.2024.177763","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177763","url":null,"abstract":"The utilization of phosphors for information storage, data encryption, temperature sensing, etc. has been becoming a research hotspot. However, modulating dynamic and pluralistic phosphor emissions is still a huge challenge. Herein, we developed a Li+-induced site occupation engineering in Bi3+ activated Mg2SnO4 (MSO) phosphor with multiple emissions and dynamic afterglow for versatile applications. Experiments and first-principles calculations demonstrated that Bi3+ would simultaneously enter [MgO4] tetrahedron and [SnO6] octahedron to present red and blue emissions, respectively. As Li+ ions were introduced into Mg2SnO4:Bi3+, the preferably generated [LiO4] could hinder the Bi3+ from entering [MgO4] units, so as to force Bi3+ to substitute Sn4+ in [SnO6], thereby leading to strengthened blue emission. Due to the distinct luminescence decay of Bi3+ in tetrahedron and octahedron units, the luminescence colors were regulated from blue to purple and red with enhancing temperature upon UV light excitation, being suitable for luminescence intensity ratio (LIR) thermometer. Moreover, by virtue of the afterglow properties originating from the inherent oxygen vacancies of Mg2SnO4, the dynamic information encryption and anti-counterfeiting by Mg2SnO4:Bi3+, Li+ were achieved. The proposed site occupation engineering can certainly spur several innovative ideas in manufacturing high-performance phosphors for versatile applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"129 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742556","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

Fabrication of shaddock peel biochar mediated Cd0.8Zn0.2S nanocomposite and synergistic adsorptive-photocatalytic performance for pollutant removal

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177852

Xiao-qiang Feng, Min Zhou, You-mei Han, Jin-yan Bi, Jia-yi Cai, Yan-dong Liu, Jingyi Wang, Xiao-fang Li

{"title":"Fabrication of shaddock peel biochar mediated Cd0.8Zn0.2S nanocomposite and synergistic adsorptive-photocatalytic performance for pollutant removal","authors":"Xiao-qiang Feng, Min Zhou, You-mei Han, Jin-yan Bi, Jia-yi Cai, Yan-dong Liu, Jingyi Wang, Xiao-fang Li","doi":"10.1016/j.jallcom.2024.177852","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177852","url":null,"abstract":"Developing inexpensive, eco-friendly and efficient catalysts is the key to photocatalytic removal of organic pollutants from wastewater. In this paper, a novel pre-treatment activated shaddock peel biochar mediated hexagonal Cd0.8Zn0.2S composite photocatalyst (CZS/BC) was fabricated by hydrothermal method and comprehensively characterized. The photocatalytic performance was assessed by degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation. Compared with the pristine Cd0.8Zn0.2S (CZS), the doping of shaddock peel biochar (BC) not only significantly reduces the band gap energy (Eg) of the CZS, but also significantly improves the adsorption and photocatalytic performance. Under the synergistic action of adsorption and photocatalysis, the optimal CZS/BC-0.3 sample exhibited the best removal performance, and could almost completely eliminate RhB pollutant within 50 min with good stability, possessing great application potential in practical environmental remediation. The removal efficiency was 6.4 folds higher than pristine CZS. Studies on photocatalytic mechanism showed that photocatalysis was mainly predominated by •O2- and h+ induced pathways, and the enhancement of photocatalytic performance can be attributed to the formation of hexagonal CZS, with biochar as an electron bridge and trap, the photogenerated carrier can be separated more effectively, thus enhancing the photocatalytic performance. This work provides a new idea for constructing new composite photocatalysts using BC as electron transport bridge.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"259 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742751","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

The preparation and luminescence properties of Gd2SiO5:Tb3+@SiO2 core-shell spherical particles

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177805

Sikun Hu, Weijun Zhao, Xinyi Huang, Xueni Yang, Jiayi Zhang, Litian Lin, Haiyong Ni, Jiuping Zhong

{"title":"The preparation and luminescence properties of Gd2SiO5:Tb3+@SiO2 core-shell spherical particles","authors":"Sikun Hu, Weijun Zhao, Xinyi Huang, Xueni Yang, Jiayi Zhang, Litian Lin, Haiyong Ni, Jiuping Zhong","doi":"10.1016/j.jallcom.2024.177805","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177805","url":null,"abstract":"Rare-earth spherical particles (RE-SPs) have garnered significant interest as nanomaterials for biomedical applications due to their high luminescence intensity and tunable luminescence lifetimes. In this study, Tb3+-doped Gd2SiO5@SiO2 (GSO: Tb3+@SiO2) core-shell spherical particles were prepared by coprecipitation and Stöber methods. Firstly, the phase transitions and core-shell structures of GSO:Tb3+@SiO2 SPs during preparation were discussed. The obtained core-shell SPs exhibited excellent dispersion and a well-defined spherical morphology with sizes ranging from 250 to 350 nm. Secondly, the luminescence properties of GSO:Tb3+@SiO2 SPs were investigated, delving into the concentration quenching mechanisms of Tb3+ ion and the energy transfer (ET) from Gd3+ to Tb3+ in SPs. Thirdly, the potential biomedical applications of the GSO:Tb3+@SiO2 SPs were evaluated by examining properties such as radioluminescence, luminescence stability and surface charge. The results of present work indicates that the obtained novel spherical particles material with distinct core-shell structures has potential application in X-ray induced photodynamic therapy (X-PDT).","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"65 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742549","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

Corrigendum to “Fabrication of CF/WS2/MoS2 composite counter electrodes for enhancing efficiency in fiber-shaped dye-sensitized solar cells (FDSSCs)” [J. Alloy. Compd. 1010 (2025) 177276]

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177782

Muawia Mohamed Ahmed Mahmoud, Normurot Fayzullaev, Refaay Ahmed Ibrahem, Prakash Kanjariya, Deepak Bhanot, Boddu Ramesh, Yashpal Yadav, Thabat Reyes Ashgah Mamory, Talib Munshid Hanoon

引用次数: 0

Acetylacetone as a new fuel for simple combustion sol-gel processing of NiCo2O4 nano-porous thin films

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177843

Walid Riad, Abderrahman Mellalou, Hoda Ait Dads, Saida Laalioui, Kenza EL Idrissi, Abdelkader Outzourhit

{"title":"Acetylacetone as a new fuel for simple combustion sol-gel processing of NiCo2O4 nano-porous thin films","authors":"Walid Riad, Abderrahman Mellalou, Hoda Ait Dads, Saida Laalioui, Kenza EL Idrissi, Abdelkader Outzourhit","doi":"10.1016/j.jallcom.2024.177843","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177843","url":null,"abstract":"Nickel-cobaltite films (NiCo2O4) are promising electrodes for a variety of applications, including solar cells and supercapacitors. Therefore, numerous studies have investigated synthesis methods to tailor the properties of this compound for specific applications. In this article, we investigate acetylacetone as a fuel in the combustion process to synthesize NiCo2O4 (NCO) films. By X-ray diffraction and Raman spectroscopy, we confirmed the crystallinity and purity of the spinel phase for the deposited films. Furthermore, we investigated the morphology of the films by field emission scanning electron microscopy and found a tendency towards a nanoporous microstructure at higher annealing temperatures. The deposited films exhibit good optical transmission in the near-infrared and visible spectrum. In addition, the band gap decreased slightly from 2.33 eV to 2.2 eV with increasing annealing temperature. The electrical properties were investigated using the hot-probe and four-probe methods. The measurements revealed a p-type semiconductor behavior and a maximum electrical conductivity of 25.8 S.cm-1 for the films annealed at 450°C.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"115 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742548","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

Effect of W concentration on the thermal stability of Cu-carbon nanotube hybrids

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177841

Pengyan Mao, Ruochen Zhang, Shaohu Tao, Hui Zhao, Zhao Cheng

引用次数: 0

Inverse spinel Fe-NiCo2O4/NiO nanocomposite supported on defect-rich P-rGO sheets for enhanced OER activity

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177856

Subhajit Sarkar, Priyanshu Chaubey, Prashant Kr. Sharma

{"title":"Inverse spinel Fe-NiCo2O4/NiO nanocomposite supported on defect-rich P-rGO sheets for enhanced OER activity","authors":"Subhajit Sarkar, Priyanshu Chaubey, Prashant Kr. Sharma","doi":"10.1016/j.jallcom.2024.177856","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177856","url":null,"abstract":"Developing affordable, stable, and non-toxic electrocatalysts with strong catalytic activity is essential for commercializing hydrogen fuel economy. Here, we have developed an inverse spinel-based 0.3Fe-NiCo1.7O4/NiO@P-rGO electrocatalyst by solvothermal synthesis, annealing, and ultrasonication. The material's structure, phase and defects were determined using XRD and Raman analysis. TEM and FESEM investigations confirmed the material's nanoparticle-adorned urchin-shaped morphology. The elemental analysis confirmed the elemental percentages using EDX to align with the synthesized material's stoichiometric ratio. The XPS study demonstrates that the electronic environment of the nanocomposite is altered due to Fe-doping and the introduction of defect-rich P-rGO sheets. Oxygen vacancy sites are increased, and transition metal oxidation states are altered due to their synergistic modulation impact. Increased electron movement and decreased surface absorption energy are two benefits of the higher oxygen vacancy level. Due to these features, the material can attain an extremely low overpotential for OER electrocatalysis of 293 mV at 10 mA.cm-2. Faster reaction kinetics are also suggested by the extremely low Tafel slope of 61.55 mV.dec-1. According to the ECSA study, each active site's improved internal activity is primarily responsible for the material's better performance. Even after 24 hours of chronoamperometry testing, the material maintained a tiny overpotential of 365 mV at 10 mA.cm-2. This work reveals that the modified 0.3Fe-NiCo1.7O4/NiO@P-rGO electrocatalyst may be employed as a stable anode material for hydrogen fuel production.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"13 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742634","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

Synergetic effect of edge states and point defects to tune ferromagnetism in CVD-grown vertical nanostructured MoS2: A correlation between electronic structure and theoretical study

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177845

Sharmistha Dey, Pankaj Srivastava, Ankita Phutela, Saswata Bhattacharya, Fouran Singh, Santanu Ghosh

{"title":"Synergetic effect of edge states and point defects to tune ferromagnetism in CVD-grown vertical nanostructured MoS2: A correlation between electronic structure and theoretical study","authors":"Sharmistha Dey, Pankaj Srivastava, Ankita Phutela, Saswata Bhattacharya, Fouran Singh, Santanu Ghosh","doi":"10.1016/j.jallcom.2024.177845","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177845","url":null,"abstract":"Room-temperature ferromagnetism (RTFM) exhibited by nanostructured two-dimensional semiconductors for spintronics applications is a fascinating area of research. The present work reports on the correlation between the electronic structure and magnetic properties of defect-engineered nanostructured MoS2 thin films. Low-energy light and heavy-mass ion irradiation have been performed to create defects and tune the magnetic properties of MoS2. Vertical nanosheets with edge termination in the pristine sample have been examined by field emission scanning electron microscopy (FESEM). Deterioration of vertical nanosheets is observed in low-energy Ar+ and Xe+ irradiated samples. High-resolution transmission electron microscopy (HR-TEM) analysis confirmed the sample’s crystallinity and the (002) plane formation. An appreciably high magnetization value of 1.7 emu/g was observed for edge-oriented nanostructured pristine MoS2 thin films, and it decreased after ion irradiation. From X-ray photoelectron spectroscopy (XPS) data, it is evident that, due to oxygen incorporation in the sulfur vacancy sites, Mo 5+ and 6+ states increase after ion irradiation. The density functional theory (DFT) calculations suggest that the edge-oriented spins of the prismatic edges of the vertical nanosheets are primarily responsible for the high magnetic moment in the pristine film, and the edge degradation and reduction in sulfur vacancies by the incorporation of oxygen upon irradiation result in a decrease in the magnetic moment.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"20 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742551","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

Negligible Influence of C-related Defect on the Barrier Properties of Ti3C2T2/SiC Contacts: A First-Principles Study

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177850

Liuqiang Gu, Lingqin Huang, Junqiang Wang, Xiaogang Gu

{"title":"Negligible Influence of C-related Defect on the Barrier Properties of Ti3C2T2/SiC Contacts: A First-Principles Study","authors":"Liuqiang Gu, Lingqin Huang, Junqiang Wang, Xiaogang Gu","doi":"10.1016/j.jallcom.2024.177850","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177850","url":null,"abstract":"The nature of the metal/semiconductor (M/S) contact (Ohmic or Schottky) in electronic devices can greatly affect the electronic properties of the component. The effective regulation of Schottky barrier height (SBH) has great importance for the successful operation of any electronic device. This paper demonstrates that the Ti3C2T2/SiC interface can effectively suppress the Fermi level pinning (FLP) effect through van der Waals stacking. By investigating the effects of the most probable C-related defect, namely carbon substitutional doping at silicon sites (CSi defects), on the contact performance of Ti3C2T2/SiC. It is found that CSi defects do not affect the contact type of Ti3C2T2/SiC and have little impact on the tunneling barrier. In addition, the SBH of Ti3C2T2/SiC could be modulated by a vertical electric field, without altering the tunneling barrier. The modulation is also not influenced by the CSi defects. Furthermore, based on the calculated Schottky and tunneling barriers, Ti3C2(OH)2 is the most compatible electrode with 2D SiC among the Ti3C2T2, even in the presence of CSi defects in SiC.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"9 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742553","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

Discovery of narrow-band emitting phosphor Na5Al3F14:Eu2+ using local structure similarity

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2024-11-29 DOI: 10.1016/j.jallcom.2024.177853

Akihiro Nakanishi, Yukinori Koyama, Takayuki Nakanishi, Shiro Funahashi, Hisanori Yamane, Kohsei Takahashi, Naoto Hirosaki, Hidekazu Ikeno, Takashi Takeda

{"title":"Discovery of narrow-band emitting phosphor Na5Al3F14:Eu2+ using local structure similarity","authors":"Akihiro Nakanishi, Yukinori Koyama, Takayuki Nakanishi, Shiro Funahashi, Hisanori Yamane, Kohsei Takahashi, Naoto Hirosaki, Hidekazu Ikeno, Takashi Takeda","doi":"10.1016/j.jallcom.2024.177853","DOIUrl":"https://doi.org/10.1016/j.jallcom.2024.177853","url":null,"abstract":"Narrow-band emitting phosphors are utilized to improve the color purity and expand the color gamut of display. Data-driven approach is an effective technique to search the host material of the narrow-band emitting phosphors. Herein, we discover a new narrow-band emitting phosphor Na5Al3F14:Eu2+ by a local structure similarity. 2D scatter plot of the structural similarity revealed that the local structure of Na1-site of the Na5Al3F14 located to near the Sr-sites of the narrow-band emitting phosphor SrLiAl3N4:Eu2+. A powder of the narrow-band emitting phosphor Na5Al3F14:Eu2+ was successfully synthesized by a solid-state reaction method. The Na5Al3F14:Eu2+ phosphor exhibited a narrow-band emission at 393 nm with a full width at half-maximum of 30 nm (1549 cm-1). The internal and external quantum efficiency was 56.0% and 45.0%, respectively. The photoluminescence intensity at 200°C was maintained at 63.0% of room temperature. This approach accelerates the discovery of new phosphors with specific luminescence properties.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"28 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142742547","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