Journal of Rare Earths最新文献

{"title":"A theoretical analysis of structural, optoelectronic and transport properties in rare earth Sr2REUO6 (RE = Lu, Nd) double perovskites","authors":"Kiran Riaz,&nbsp;Iftikhar Ahmed,&nbsp;Marwa Rasheed,&nbsp;Calvyn T. Howells,&nbsp;Subbulakshmi Ganesan,&nbsp;Ishfaq Ahmed,&nbsp;Renu Sharma,&nbsp;Shakti Prakash Jena,&nbsp;T. Anand,&nbsp;Gamil A.A.M. Al-Hazmi","doi":"10.1016/j.jre.2026.01.025","DOIUrl":"10.1016/j.jre.2026.01.025","url":null,"abstract":"<div><div>Rare earth-based double perovskites have gained interest in research due to their tunable physical properties, like optoelectronic and thermoelectric properties for sustainable energy applications, and yet many of such materials remained unexplored. Uranium based double perovskites have prospective for energy harvesting technologies due to their unique spin dependent and thermoelectric behavior. So, this work aims to explore Sr₂REUO₆ (RE = Lu, Nd) compounds for their geometrical, electronic, optical, and thermal attributes using density functional theory (DFT). Negative formation energy predicts these materials structural stability values ranging from −4.834 to −4.282 eV, respectively. Spin polarized band structure analysis for Sr₂LuUO₆ reveals semi-metallic behavior with band gap in spin-up channel with value (3.4 eV) and metallic nature in other channel, while Sr₂NdUO₆ shows semiconducting nature with band gap values in both spin channels. Strong polarization and efficient charge separation can be seen in Sr₂NdUO₆ which is due to high static value of dielectric constant (7.3), making it suitable for photovoltaic devices, as compared to Sr₂LuUO₆ which shows sharp optical response in UV-region of light making it efficient for UV photodetectors. Strong absorption for optical light can be seen by both materials which is considered a good quality in multi-junction solar cells for broad-spectrum energy harvesting. Additionally, figure of merit (<em>ZT</em>, 0.66 for Sr₂LuUO₆ and 0.96 for Sr₂NdUO₆) at room temperatures suggests promising performance for energy-harvesting devices. All these finding point out Sr₂REUO₆ (RE = Lu, Nd) compounds as efficient candidates among rare earth-based double perovskites for solar energy harvesting applications.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 9","pages":"Pages 2713-2721"},"PeriodicalIF":9.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid photochromism and reversible dual-mode luminescence modulation of La2LiSbO6 double perovskite for optical security","authors":"Suen Li,&nbsp;Anjun Huang,&nbsp;Sai Li,&nbsp;Yingzhu Zi,&nbsp;Xue Bai,&nbsp;Heping Zhao,&nbsp;Yang Ci,&nbsp;Yangke Cun,&nbsp;Yue Liu,&nbsp;Zhiguo Song,&nbsp;Jianbei Qiu,&nbsp;Peng Ren,&nbsp;Ji Zhou,&nbsp;Zhengwen Yang","doi":"10.1016/j.jre.2025.09.032","DOIUrl":"10.1016/j.jre.2025.09.032","url":null,"abstract":"<div><div>Inorganic photochromic phosphors are a subject of significant interest in optical storage and security applications. Double perovskite oxides are a promising category as a photochromic luminescent host due to their tunable structure, while facing the problem of slow coloration response speed. Herein, the photochromic properties of the La₂LiSbO₆ are explored, showing a fast photochromic-saturated speed within 30 s upon 254 nm ultraviolet stimulation. The color of the La₂LiSbO₆ can be reversibly changed between white and pink during the photochromic and photobleaching process, and the coloration mechanism is predominantly the generation of color centers. The maximum coloration contrast can be enhanced from 12.39% to 20.74% by doping with 0.1 mol% Co²⁺ ions, which is mainly attributed to the substitution of Co²⁺ in the Sb⁵⁺ site, promoting oxygen vacancy formation. The downshifting and upconversion dual-mode luminescence can be implemented by co-doping Er³⁺ ions, showing a reversible luminescent modulation relying on the synergistic effect of reabsorption and nonradiative transition from Er³⁺ to quenchers. Leveraging the photochromism and dual-mode luminescence regulation of Co²⁺, Er³⁺ co-doped La₂LiSbO₆, a proof-of-concept experiment was carried out to verify its potential as an optical anti-counterfeiting agent.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 9","pages":"Pages 2572-2579"},"PeriodicalIF":9.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning interfacial microenvironment of Ni(OH)2/GO by lanthanum doping for efficient photoelectrocatalytic oxidation of methanol","authors":"Jiashuo Lv,&nbsp;Liming Xu,&nbsp;Fan Zhang,&nbsp;Danqin Li,&nbsp;Jie Li,&nbsp;Yufei Hu,&nbsp;Wenjing Zhou,&nbsp;Meisi Yu,&nbsp;Furui Lin,&nbsp;Jian Hou,&nbsp;Weiqiang Zhou","doi":"10.1016/j.jre.2026.04.034","DOIUrl":"10.1016/j.jre.2026.04.034","url":null,"abstract":"<div><div>Nickel-based catalysts are attractive for methanol oxidation owing to their structural tunability and intrinsic activity for C–H bond activation. However, their limited ability to capture OH^– at the reaction interface results in reduced energy-conversion efficiency. In this work, we demonstrate that La-Ni(OH)₂/graphene oxide (GO) delivers a multilevel synergistic optimization that markedly enhances photoelectrochemical methanol oxidation. The random doping of La disturbs the periodicity of Ni–O lattice, which promotes surface reconstruction and the enrichment of OH^– at the electrified interface. Notably, La doping-induced oxygen vacancies act as charge-trapping sites, promoting the separation of photogenerated electron-hole pairs. More photogenerated holes can reach the reaction interface and participate in oxidation, synergistically enhancing the photoelectrocatalytic efficiency. By optimizing the interfacial microenvironment, the La-Ni(OH)₂/GO catalyst achieves a current density of 179.8 mA/cm² in alkaline medium and increases to 222.6 mA/cm² under illumination.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 9","pages":"Pages 2660-2667"},"PeriodicalIF":9.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148861952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Er3+/Pr3+ co-doped lead-free halide double perovskites: Synergistic energy transfer engineering for enhanced mid-infrared luminescence in Cs2AgInCl6 crystals","authors":"Banghu Wei,&nbsp;Yuanzhi Chen,&nbsp;Mingjie Zhang,&nbsp;Jie Li,&nbsp;Mengyi Wang,&nbsp;Peng'en Ren,&nbsp;Jiayue Xu,&nbsp;Seongwoo Yoo,&nbsp;Jian Zhang","doi":"10.1016/j.jre.2025.10.017","DOIUrl":"10.1016/j.jre.2025.10.017","url":null,"abstract":"<div><div>Lead-free Cs₂AgInCl₆ double perovskites have emerged as promising mid-infrared (MIR) emissive materials owing to their intrinsically low phonon energies and high photoluminescence efficiencies. However, their fundamental emission mechanisms and practical applicability remain underexplored. In this work, <em>x</em>Pr: Cs₂AgEr_0.5In_0.5_–_<em>x</em>Cl₆ (<em>x</em> = 4 mol%, 6 mol%, and 8 mol%) crystals were grown via a two-step solution method. A synergistic co-doping strategy incorporating Er³⁺ and Pr³⁺ ions into Cs₂AgInCl₆ is presented to enhance MIR output significantly. The introduction of Pr³⁺ ions effectively suppresses ion-related nonradiative recombination and facilitates more efficient energy-transfer pathways. Concurrently, co-doping induces an anomalous lattice contraction, enabling modulation of the crystal field and optimization of the rare-earth energy-level alignment. As a result, the Er³⁺/Pr³⁺ co-doped Cs₂AgInCl₆ crystal exhibits an enhancement of nearly one order of magnitude in emission intensity at the 3.0 μm wavelength compared to its Er³⁺-doped counterpart. The bandgap of the Pr³⁺ co-doped crystals is calculated, revealing a gradual reduction from 3.41 to 3.34 eV as the Pr³⁺ concentration increases – an effect attributed to Pr-4f/In-5s orbital hybridization. Thermal stability studies further demonstrate that the STE emission intensity of Er³⁺/Pr³⁺ co-doped Cs₂AgInCl₆ crystals remains relatively stable overall with increasing temperature, exhibiting excellent structural thermal robustness and a tunable chromaticity (CIE coordinates shifting from 0.257 to 0.504). These findings not only elucidate the underlying “strain-to-light” paradigm in Cs₂AgInCl₆ crystals but also provide theoretical support for their applications in hyperspectral imaging, quantum communication, and next-generation MIR laser technologies.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2304-2312"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recycling of Sm-Co permanent magnet waste: Perspectives and recent advances","authors":"Xuechen Ren,&nbsp;Lanlan Wei,&nbsp;Aozong Sun,&nbsp;Baoqiang Xu,&nbsp;Wenlong Jiang,&nbsp;Bin Yang,&nbsp;Fei Wang","doi":"10.1016/j.jre.2025.09.038","DOIUrl":"10.1016/j.jre.2025.09.038","url":null,"abstract":"<div><div>Samarium-cobalt (Sm-Co) permanent magnet materials are extensively utilized in specialized sectors, including renewable energy and electronic information, owing to their superior magnetic characteristics in challenging environments. The manufacturing and application of Sm-Co permanent magnets result in the generation of significant waste, making the efficient recovery of valuable metals from this waste crucial for mitigating the scarcity of strategic metal resources in China. Historically, research efforts have predominantly concentrated on recyclable Nd-Fe-B permanent magnet waste, with comparatively less emphasis on the regeneration and utilization of Sm-Co waste. Consequently, this study provides a comprehensive review of the existing recycling methodologies for Sm-Co waste. The study presents a comparative analysis that assesses the relative merits and drawbacks of a variety of hydrometallurgical processes, such as hydrochloric acid optimal dissolution, acid precipitation, and sulfate double salt techniques. Additionally, the feasibility and economic viability of pyrometallurgical processes, including chlorination, glass slag method and vacuum distillation, were examined. The study also delineated the limitations associated with techniques such as electrodeposition and hydrogenation in the context of recycling Sm-Co permanent magnet waste. Based on the above comparative analysis, this paper suggests a sustainable and efficient Sm-Co waste recycling process, as well as potential directions for future technological advances.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2259-2271"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain-fusion amorphous garnet-type solid-state electrolytes via optimized co-precipitation for high-performance all-solid-state batteries","authors":"Yiyang Xiao,&nbsp;Juanyu Yang,&nbsp;Xiaobao Zhang,&nbsp;Ning Wang,&nbsp;Zhihao Guo,&nbsp;Weiliang Zeng,&nbsp;Shiang Liang,&nbsp;Jun Chen,&nbsp;Xiaowei Huang","doi":"10.1016/j.jre.2025.09.034","DOIUrl":"10.1016/j.jre.2025.09.034","url":null,"abstract":"<div><div>Garnet-type solid-state electrolyte Li₇La₃Zr₂O₁₂ (LLZO) system faces challenges related to limited ion conductivity (with widely used Ta-LLZO typically exhibiting ion conductivity around 0.7 mS/cm) and the growth of lithium filaments during cycling. While the co-precipitation method theoretically offers the potential for improved performance and is amenable to industrial scaling, its application has been hindered by inconsistent results and significant performance fluctuations. This work utilized an optimized co-precipitation approach to prepare highly active, nanoscale uniformly mixed precursors in a high-pH reaction environment. Through short-term sintering at a low temperature, a unique grain-fusion amorphous structure is obtained in Ta-LLZO all-solid-state electrolyte, achieving an ion conductivity of 1.5 mS/cm at 25 °C, the highest reported for Ta-LLZO. The electrolyte also demonstrates excellent resistance to lithium filament growth, with a critical current density of 1.8 mA/cm². The lithium symmetric cell exhibits stable cycling for over 2500 h at 0.6 mA/cm² without significant polarization. Additionally, the stable cycling assembled full cell demonstrates high specific capacity and excellent rate performance. These results underscore the potential of the solid-state electrolyte with grain-fusion and amorphization structure prepared by co-precipitation to advance the application and commercialization of all-solid-state batteries.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2396-2407"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-sensitivity temperature sensor of Cr3+-doped Lu2BaAl4SiO12 phosphor","authors":"Fangrui Cheng,&nbsp;Yixuan Lai,&nbsp;Yizhi Zheng,&nbsp;Luxia Zhong,&nbsp;Fangmin Lin,&nbsp;Huanyi Gu,&nbsp;Qi Wu,&nbsp;Xin Lan,&nbsp;RunYing Zheng,&nbsp;JiaYi Cheng,&nbsp;Ruirui Yang,&nbsp;Renping Cao,&nbsp;Xiping Jing","doi":"10.1016/j.jre.2025.09.001","DOIUrl":"10.1016/j.jre.2025.09.001","url":null,"abstract":"<div><div>During recent years, non-contact ratiometric luminescent thermometry has gained increasing attention in scientific research due to its remarkable advantages including high precision, rapid response, and operational convenience. Chromium ions (Cr³⁺), owing to their high emission intensity and inherent benefits from the 3d³ electronic configuration, have emerged as the most extensively utilized transition metal ions in luminescent temperature sensing. Accordingly, we synthesized Lu₂BaAl₄SiO₁₂:Cr³⁺ phosphors via high-temperature solid-state reaction and systematically investigated their photoluminescence-based temperature sensitivity. In this material, Cr³⁺ ions experience strong crystal field effects, resulting in the observation of both R-line emissions and narrowband emissions from the overlapping ²E and ⁴T₂ transitions. By strategically employing the fluorescence intensity ratio (FIR) between these emissions, we developed a ratiometric luminescent thermometer achieving a maximum relative sensitivity (<em>S</em>_r) of 1.93%/K at 498 K. Furthermore, an optical temperature-sensing film was fabricated for practical temperature measurements in organic solutions. The results demonstrate excellent agreement between FIR-derived temperatures and programmed values, with a maximum deviation of merely 1.49 K. These findings establish a novel approach for designing highly sensitive Cr³⁺-doped ratiometric fluorescent temperature sensors.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2340-2347"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147916156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Europium doping into BiOBr to promote photogenerated electron–hole separation and enhance photocatalytic reduction of CO2 to CO","authors":"Yadong Xiong,&nbsp;Yongping Luo,&nbsp;Wenzhen Qin,&nbsp;Yu Xie,&nbsp;Yongcun Ma,&nbsp;Changlin Yu,&nbsp;Zhanggao Le","doi":"10.1016/j.jre.2025.09.010","DOIUrl":"10.1016/j.jre.2025.09.010","url":null,"abstract":"<div><div>The restricted capture of visible light and high-speed electron–hole complexation efficiency of BiOBr impose limitations on its CO₂ reduction photocatalytic activity. In this study, we successfully doped Eu into BiOBr, which facilitates the catalytic reduction ability of carbon dioxide to yield carbon monoxide. Surface oxygen vacancies were introduced on BiOBr after Eu-doping. The Eu-BiOBr possesses high visible light absorption range and low photoelectron–hole recombination rate. In the absence of sacrificial agents, the best performance of photocatalytic reduction of CO₂ to CO for Eu-BiOBr is achieved at a doping amount of 3% Eu (in mass fraction wt%). The amount of CO generated by 3%Eu-BiOBr is 22.3 μmol/(g·h), which is 10 times greater than that of single BiOBr (2.2 μmol/(g·h)). In conclusion, this study provides important reference for future research on catalysts for the reduction of carbon dioxide.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2368-2375"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review on progress of rare earth molecule-based functional materials in 2025","authors":"Pingru Su,&nbsp;Can Diao,&nbsp;Yu Tang,&nbsp;Chun-Hua Yan","doi":"10.1016/j.jre.2026.06.005","DOIUrl":"10.1016/j.jre.2026.06.005","url":null,"abstract":"<div><div>This article reviews recent progress in the field of rare earth molecule-based functional materials in 2025, focusing on the latest breakthroughs in ligand engineering, controlled assembly and functional regulation covering luminescent, magnetic, catalytic, and multifunctional coupled systems. The aim is to provide an overview of research spanning molecular design to device-level applications, investigate function-oriented molecular engineering and performance regulation, analyze common scientific challenges in the field, and propose solutions for the targeted design and industrial application of materials.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2249-2258"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of main rare earth ore smelting processes in the world: From traditional methods to new technologies","authors":"Yang Jiang,&nbsp;Jianfei Li,&nbsp;Yanglei Geng,&nbsp;Xingwang Ye,&nbsp;Shengfeng Ma,&nbsp;Xiaoyan Hao,&nbsp;Wenbin Xin,&nbsp;Yifan Chai","doi":"10.1016/j.jre.2025.07.027","DOIUrl":"10.1016/j.jre.2025.07.027","url":null,"abstract":"<div><div>Rare earth elements, serving as critical strategic resources for modern industrial systems and foundational materials in the digital era, underpin the technological competitiveness and industrial security landscape of nations through breakthroughs in their efficient and green metallurgical technologies. This paper focuses on the four major pillars of global rare earth resources, namely bastnaesite, monazite, mixed rare earth ores, and ion-adsorption type rare earth ore, and systematically analyzes the iterative trajectories and paradigm shifts in the metallurgical processes for these four mineral resources. After half a century of technological innovations, rare earth extraction technologies have achieved a leapfrog development from high-pollution, high-energy-consuming acid-base leaching processes to green and low-carbon metallurgical systems. Notable advancements in clean production, hierarchical resource utilization, and near-zero emission technologies have significantly enhanced resource utilization efficiency, embodying a transformative progression toward sustainable metallurgical practices.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2272-2295"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}