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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 609-618页

作者： Yi Sui Yingde Zhang Guang Liu Lei Ji Junyu Yue Chen Wu Mi Yan School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization Baotou Research Institute of Rare EarthsBaotou 014030China key laboratory of rare earths Chinese Academy of SciencesGanzhou 341119China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China

Interface modulation is an important pathway for highly efficient electromagnetic wave ***,tailored interfaces between Fe_(3)O_(4)particles and the hexagonal-YFeO_(3)(h-YFeO_(3))framework were constructed via facile *** resulting interfa-cial electron rearrangement at the heterojunction led to enhanced dielectric and magnetic loss *** results and density function theory(DFT)simulations demonstrate a transition in electrical properties from a half-metallic monophase to metallic Fe_(3)O_(4)/h-YFeO_(3)composites,emphasizing the advantages of the formed *** transformation of electron behavior is also accompan-ied by a redistribution of electrons at the Fe_(3)O_(4)/h-YFeO_(3)heterojunction,leading to the accumulation of localized electrons around the Y-O-Fe band bridge,consequently enhancing the polarization.A minimum reflection loss of-34.0 dB can be achieved at 12.0 GHz and 2.0 mm thickness with an effective bandwidth of 3.3 GHz due to the abundant interfaces,enhanced polarization,and rational ***,the synergistic effects endow the Fe_(3)O_(4)/h-YFeO_(3)composites with high performance and tunable functional properties for efficient electromagnetic absorption.

关键词： self-assembling heterojunction electron rearrangement interface modulation electromagnetic wave absorption

Recent advances of cerium compounds in functional coatings:Principle,strategies and applications

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Journal of rare earths 2025年第2期43卷 227-245,I0001页

作者： Kai An Youqiang Wang Yi Sui Yongquan Qing Wei Tong Xuezhao Wang Changsheng Liu School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao266520China State key laboratoryof baiyunobo rare earth resource researches and comprehensive utilization Baotou Research Institute of Rare EarthsBaotou 014030China School of Materials Science and Engineering Northeastern UniversityShenyang110819China Center for Nano and Micro Mechanics Tsinghua UniversityBejing100084China

Cerium(Ce) compounds have attracted considerable attention as key components in functional coatings due to their many outstanding *** work provides a comprehensive review of recent advances in the application of Ce in functional *** role of Ce in the improvement of functional properties such as corrosion-resistance,self-healing,superhydrophobicity,wear-resistance,and UV shielding is reviewed from the perspective of functional mechanism and applied ***,the strategies,processes,practical problems,and current challenges in the research of functional coatings containing Ce are summarized and *** objective is to highlight the great potential of Ce in functional coatings,and to explore new applications of Ce in the development of novel ***,this work aims to enhance the application value of Ce,solving the problem of unbalanced application of rare-earth elements.

关键词： Cerium Functional coatings Corrosion Superhydrophobicity UV resistance rare earths

Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO_(2) in CO_(2)electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei Xue Tong Shi Chenhui Han Heng Zhang Fenrong Liu Haorun Li Yan Wang Xiaojun Gu Shanghong Zeng Inner Mongolia key laboratory of Chemistry and Physics of rare earth Materials School of Chemistry and Chemical EngineeringInner Mongolia UniversityHohhot 010021Inner MongoliaChina State key laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina Institute of Catalysis Department of ChemistryZhejiang UniversityHangzhou 310058ZhejiangChina National key laboratory of baiyunobo rare earth resource Research and comprehensive utilization Baotou Research Institute of Rare EarthsBaotou 014030Inner MongoliaChina

Conversion of CO_(2)back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO_(2)nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79%catalytic current density to hydrocarbons(excluding CO),with 49%faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO_(2)utilization.

关键词： Cu/CeO_(2)-x Oxygen vacancy Hydrocarbon production Reaction mechanism

Amino acid assisted aqueous synthesis of highly stable CsPbBr_(3)nanocrystals for cell imaging

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Nano Research 2025年第1期18卷 675-683页

作者： Xue Li Yanan Guo Guoying Tan Qingyi Liu Nan Song Yu Tang State key laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Lead halide perovskite nanocrystals(NCs)exhibit excellent optoelectronic performance and have drawn great interests in the fields of biological imaging and ***,the poor stability of CsPbX_(3)(X=Cl,Br,I)in water is still a challenge to hinder their practical *** this work,a facile strategy has been developed for aqueous synthesis of CsPbX_(3) nanocrystals,in which L-glutamic acid(LGlu)has been used to replace oleic acid in the synthetic *** from the synergic effects of L-Glu and oleylamine(OAm),CsPbBr_(3)nanocrystals(L-Glu/OAm-CsPbBr_(3)NCs)with high water stability have been directly prepared under a mild condition at room temperature in water,facilitated by the process of crystal phase transformation from Cs_(4)PbBr_(6) to CsPbBr_(3).L-Glu/OAm-CsPbBr_(3)NCs exhibit a high quantum yield of 85%and a narrow full width at half maximum of 16 nm,demonstrating their efficient luminescence in ***,L-Glu on the surface have contributed greatly to an acidic environment and passivation of surface defects,improving the water stability and dispersibility of CsPbBr_(3)***,L-Glu/OAm-CsPbBr_(3)NCs exhibit great biocompatibility due to the presence of L-Glu,resulting in their good performance for HeLa cell ***,we propose a facile and effective method to prepare CsPbBr_(3)nanocrystals with excellent water stability by using L-Glu and OAm as cooperated ligands and expand their application in cell imaging.

关键词： aqueous synthesis cell imaging lead halide perovskite nanocrystals L-glutamic acid phase transformation

Deciphering Water Oxidation Catalysts:The Dominant Role of Surface Chemistry over Reconstruction Degree in Activity Promotion

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Nano-Micro Letters 2025年第3期17卷 340-354页

作者： Li An Jianyi Li Yuanmiao Sun Jiamin Zhu Justin Zhu Yeow Seow Hong Zhang Nan Zhang Pinxian Xi Zhichuan J.Xu Chun‑Hua Yan State key laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceFrontiers Science Center for Rare IsotopesCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000People’s Republic of China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Faculty of Materials Science and Energy Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China key laboratory of Electromagnetic Materials and Devices National Center for International Research On Photoelectric and Energy MaterialsSchool of Materials and EnergyElectron Microscopy CenterYunnan UniversityKunming 650091People’s Republic of China State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Beijing National laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU‑HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryPeking UniversityBeijing 100871People’s Republic of China

Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution *** surface reconstruction has been widely observed in perovskite catalysts,and the reconstruction degree has been often correlated with the activity ***,a systematic study on the roles of Fe substitution in activation of perovskite LaNiO_(3)is *** substituting Fe content influences both current change tendency and surface reconstruction ***_(0.9)Fe_(0.1)O_(3)is found exhibiting a volcano-peak intrinsic activity in both pristine and reconstructed among all substituted perovskites in the LaNi_(1-x)Fe_(x)O_(3)(x=0.00,0.10,0.25,0.50,0.75,1.00)*** reconstructed LaNi_(0.9)Fe_(0.1)O_(3)shows a higher intrinsic activity than most reported NiFe-based ***,density functional theory calculations reveal that Fe substitution can lower the O 2p level,which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and ensure its long-term ***,it is vital interesting that activity of the reconstructed catalysts relied more on the surface chemistry rather than the reconstruction *** effect of Fe on the degree of surface reconstruction of the perovskite is decoupled from that on its activity enhancement after surface *** finding showcases the importance to customize the surface chemistry of reconstructed catalysts for water oxidation.

关键词： Oxygen evolution reaction Perovskite oxides Doping Activation and reconstruction

Increasing heat resistance of a Mg-Sm-Zn alloy via minor gadolinium addition

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Journal of rare earths 2025年第3期 612-619页

作者： Deping Zhang Wenxin Hu Liren Cheng Boqiong Li Chenbin Zhang Department of Materials Science and Engineering Jinzhong University State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization State key laboratory of rare earth resources utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

The addition of minor gadolinium（Gd） into Mg-4Sm-0.6Zn-0.4Zr alloy significantly enhances hightemperature strength and creep resistance,such as a decrease in the minimum creep rate by approximately five times and an increase in the yield strength by around 40 MPa at 200℃.The presence of Gd results in the co-precipitation of both prismatic β-type and basal y-type phases during creep,whereas only the basal γ-type phase is present in the Gd-free *** prismatic β-type and basal γ-type phases are oriented perpendicular to each other in space,creating a closed configuration that effectively blocks dislocation motions compared to single basal γ-type ***,the improved creep resistance in the Gd-enriched alloy is mainly attributed to the co-precipitation of prismatic β-type and γ-type precipitates during ***,rare earth（RE） atoms inherently provide stable solute hardening at high temperatures,which contributes to the increased high-temperature *** addition of Gd also enhances grain boundary stability by promoting the formation of more Mg3RE phases,thereby further enhancing the creep *** findings offer insights into the development of highly creepresistant Mg alloys with low RE concentrations.

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Ag+-induced energy level splitting in Ln-MOFs achieves enhanced Eu3+ emission intensity

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Science China Chemistry 2025年第3期 924-934页

作者： Xiaoyong Zhai Xijiao Mu Guoying Tan Lijuan Liang Yao Kou Pingru Su Chun-Hua Yan Yu Tang State key laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou University State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization Baotou Research Institute of Rare Earths

In lanthanide（Ln） complexes,the oversight of f-electrons and inner-shell relativistic interactions has constituted a critical gap,limiting a nuanced understanding and modulation of their luminescent *** this issue,our study introduces a pioneering series of Ln-based metal-organic frameworks（Ln-MOFs）,designated as Ln-TCPP,utilizing tetraphenylpyrazinederived ligand and Ln3+ions（Ln = Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb and Lu） to modulate luminescence through advanced synthesis and theoretical *** particularly emphasize the enhancement of Eu3+luminescence in Ln-TCPP,where incorporating Ag+ions to replace [（CH3）2NH2]+within the Ln-MOFs plays a pivotal ***,by employing timedependent density functional theory（TD-DFT） with full-electron relativistic effects,we demonstrate that Ag+ions induce a splitting in the energy levels of Eu3+.This splitting effectively reduces the rate of non-radiative transitions,significantly amplifying Eu3+emission *** findings not only fill a long-standing void in understanding the all-electron relativistic interaction between f-electrons in Ln-MOFs luminescence but also establish a new strategy for controlling and optimizing the luminescent efficacy of these materials for potential applications.

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Niobium and phosphorus behavior during melting-separation process of pre-reduced niobium ore concentrate

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Journal of Iron and Steel Research International 2017年第7期24卷 691-696页

作者： Yu-bao Liu Zhi-hong Zhang Er-xiong Zhao Xian-heng Zhang Xiao-qing Wang Guo-hua Chen Inner Mongolia Niobium Metallurgical Engineering laboratory Baotou Research Institute of Rare Earths State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization

The pre-reduced Bayan Obo ferroniobium（FeNb）ore concentrate block was taken as raw materials for studying the physical properties of niobium-enriched slag and changes in niobium recovery *** addition,the dephosphorization rate of the slag under different melting-separation conditions was investigated using the melting-separation *** research results demonstrate that（i）the niobium recovery rate and dephosphorization rate of the slag decrease with the increase in melting-separation temperature;（ii）the niobium recovery rate of the slag initially increases and then decreases with increase in basicity and time;and（iii）the dephosphorization rate of the slag increases with the increase in basicity and *** the test was performed under the conditions of basicity of 0.6-0.7,time of 7-10min,and temperature of 1400-1450°C,the niobium recovery rate and dephosphorization rate are over 96%and 95%,*** scanning electron microscopy,it is observed that niobium mainly exists in the form of calcium and titanium silicate within the slag phase,with uneven distribution.

关键词： Melting separation Pre-reduced niobium ore concentrate Niobium-enriched slag Iron Dephosphorization rate Niobium recovery rate

Thermodynamic and application study of complicated extraction system Ce(Ⅳ)-HF-H_(3)BO_(3)-H_(2)SO_(4) using Cyanex 923

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Journal of rare earths 2021年第9期39卷 1117-1125页

作者： Dan Zou Haitian Li Ji Chen Deqian Li State key laboratory of baiyunobo rare earth resource researches and comprehensive utilization Baotou 014030China State key laboratory of rare earth resources utilization Changchun Institute of Applied Chemiscry Chinese Academy of SciencesChangchun 130022.China

This article aims to reduce the environmental pollution while maximizing the recovery of REEs as well as associate resource-fluorine(F)from *** paper investigates the extraction equilibrium process and mechanism of Ce(Ⅳ)-HF-H_(3)BO_(3)-H_(2)SO_(4)system using Cyanex *** equilibrium process of different systems,including HF-H_(2)SO_(4),H_(3)BO_(3)-HF-H_(2)SO_(4),and Ce(Ⅳ)-HF-H_(2)SO_(4),were studied in detail and the corresponding extraction mechanisms were also *** is noteworthy that a synergistic effect between B-F and an antagonistic effect between Ce(Ⅳ)-F were discovered first in the extraction process by Cyanex ***,H_(3)BO_(3)is found to be able to promote the extraction of F in quantitation by Cyanex *** and^(11)B and^(19)F NMR were adopted to characterize the different loaded organic *** on these results,the extraction mechanism of complicated system Ce(Ⅳ)-HF-H_(3)BO_(3)-H_(2)SO_(4)was further ***,the effect of H_(3)BO_(3)on the extraction and stripping of Ce(Ⅳ)in complicated system was ***,it shows that the addition of H_(3)BO_(3)has nothing to do with the purity of obtained CeF_(3)particle from bastneasite liquor in the practical *** H_(3)BO_(3)into bastnaesite leach liquor,on the one hand,will be beneficial for the recovery yield of Ce and *** the other hand,it can avoid from environmental pollution caused by emission of F-containing waste water as well as reducing the waste residue.

关键词： Ce(Ⅳ)-HF-H_(3)BO_(3)-H_(2)SO_(4) Extraction Cyanex 923 Thermodynamic Mechanism rare earths

In situ anodic leaching of Nd-Fe-B sludge with fast leaching kinetics for selective recovery of rare-earth elements

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Journal of rare earths 2025年第3期 603-611页

作者： Xuan Xu Xiaozheng Jia Peng Jing Yuanyuan Zhang Jianguo Cui Kristina Zuzek Sturm Saso Baocang Liu Jun Zhang School of Chemistry and Chemical Engineering Inner Mongolia University Inner Mongolia Kertixingyun Science&Technology Incubation Base Co. Ltd. the key laboratory of baiyunobo rare earth resource researches and comprehensive utilization Baotou Research Institute of Rare Earths Department for Nanostructured Materials Jozef Stefan Institute School of Chemistry and Environmental Science Inner Mongolia Normal University

Neodymium-iron-boron（Nd-Fe-B） sludge is an important secondary resource of rare-earth elements（REEs）.However,the state-of-the-art recycling method,i.e.,HCl-preferential dissolution faces challenges such as slow leaching kinetics,excessive chemical consumption and wastewater *** this work,the in situ anodic leaching of Nd-Fe-B sludge was developed to selectively recover REEs with high *** leaching rates of the REEs are 2.4-9.0 times higher using the in situ anodic leaching at the current density from 10 to 40 mA/cm2than using conventional chemical leaching under the maintained pH of *** studies reveal that the anode-generated H+plays the key role during the in situ anodic leaching process that locally increases the H+concentration at the interface of sludge particles,accele rating the leaching *** achieving a total leaching efficiency of Nd-Fe-B sludge close to 100%and the Fe deposition efficiency in the range of 70.9%-74.3%,selective leaching of REEs is successfully realized and thus largely reduces chemical ***,a two-step recycling route involving electrolysis-selective precipitation was proposed that enables a stable REEs recovery of 92.2%with recyclable *** study provides a novel and environmentally-friendly strategy for the efficient recovery of REEs from secondary resources.

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