Journal of Rare Earths最新文献_第7页

Progress in study of spray pyrolysis technology for chloride salt solutions in rare earth extraction and separation processes 稀土萃取分离过程中氯盐溶液喷雾热解技术研究进展

IF 7.2 1区化学

Journal of Rare Earths Pub Date : 2024-12-20 DOI: 10.1016/j.jre.2024.12.013

Ziyi Cheng , Xiaowei Huang , Zongyu Feng , Jianping Long , Hai Yu , Meng Wang , Juanyu Yang , Haiqing Hao

{"title":"Progress in study of spray pyrolysis technology for chloride salt solutions in rare earth extraction and separation processes","authors":"Ziyi Cheng , Xiaowei Huang , Zongyu Feng , Jianping Long , Hai Yu , Meng Wang , Juanyu Yang , Haiqing Hao","doi":"10.1016/j.jre.2024.12.013","DOIUrl":"10.1016/j.jre.2024.12.013","url":null,"abstract":"<div><div>This paper focuses on the preparation of rare earth oxide products from rare earth chloride solutions during the rare earth extraction and separation processes, as well as the recycling of magnesium chloride solutions. It proposes the idea of introducing spray pyrolysis technology into the rare earth extraction and separation processes. This paper briefly describes the development history of chloride spray pyrolysis technology, focusing on the research status and application progress of rare earth chloride solution and magnesium chloride solution spray pyrolysis technology, as well as spray pyrolysis equipment. The paper also analyzes the challenges and technical intricacies associated with applying spray pyrolysis technology to chloride solutions in the rare earth extraction and separation processes. Additionally, it explores future trends and proposes strategies to facilitate the full recycling of acids and bases, streamline the process flow, and enhance the prospects for green and low-carbon rare earth metallurgy.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2053-2064"},"PeriodicalIF":7.2,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157043","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}

引用次数: 0

Cerium valence state conversion: Fabrication and environmental remediation of modified CeO2 materials 铈价态转换：改性CeO2材料的制备及环境修复

IF 5.2 1区化学

Journal of Rare Earths Pub Date : 2024-12-18 DOI: 10.1016/j.jre.2024.12.012

Jia'ao Han , Quansheng Liu , Haitao Xu , Yang Wu , Shukun Le , Chengzhang Zhu

{"title":"Cerium valence state conversion: Fabrication and environmental remediation of modified CeO2 materials","authors":"Jia'ao Han , Quansheng Liu , Haitao Xu , Yang Wu , Shukun Le , Chengzhang Zhu","doi":"10.1016/j.jre.2024.12.012","DOIUrl":"10.1016/j.jre.2024.12.012","url":null,"abstract":"<div><div>Rare earth elements are highly applicable in photocatalysis due to their partially filled 4f orbitals, existing in electronic structures that facilitate the transfer of electrons during the reaction process. Among these materials, CeO<sub>2</sub> has a distinctive external electronic structure (4f<sup>1</sup>5d<sup>1</sup>6s<sup>2</sup>), abundant oxygen vacancies, and strong conversion ability of Ce<sup>4+</sup>/Ce<sup>3+</sup>, which makes it an attractive candidate in the field of photocatalysis. To broaden its practical applications in the visible region, the drawbacks of a wide band gap and a slow Ce<sup>4+</sup>/Ce<sup>3+</sup> cycle have been addressed through the modification of CeO<sub>2</sub>, thereby accelerating light absorption and self-circulation, and enhancing photocatalytic activity. This paper presents a review of the preparation of modified CeO<sub>2</sub> catalysts and their application in the conversion of cerium valence state in the photocatalytic degradation of pollutants in water. Furthermore, this paper presents a summary of the most recent development and current challenges, as well as prospect for the application of modified CeO<sub>2</sub>-based materials.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 3","pages":"Pages 430-440"},"PeriodicalIF":5.2,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479150","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}

引用次数: 0

Toward strength-ductility synergy in as-rolled Mg-Zn-Gd alloy achieved by annealing-induced solute segregation 通过退火诱导的溶质偏析实现轧制Mg-Zn-Gd合金的强度-塑性协同

IF 5.2 1区化学

Journal of Rare Earths Pub Date : 2024-12-14 DOI: 10.1016/j.jre.2024.12.010

Xuejian Wang , Chunquan Liu , Enyu Guo , Huaqiang Xiao

{"title":"Toward strength-ductility synergy in as-rolled Mg-Zn-Gd alloy achieved by annealing-induced solute segregation","authors":"Xuejian Wang , Chunquan Liu , Enyu Guo , Huaqiang Xiao","doi":"10.1016/j.jre.2024.12.010","DOIUrl":"10.1016/j.jre.2024.12.010","url":null,"abstract":"<div><div>In this study, a novel strategy for breaking the strength-ductility dilemma of Mg-1.5Zn-0.6Gd (wt%) alloy via solute segregation was reported. The hot extruded alloy sheet was subjected to rolling deformation, and then heat-treated at 200 °C. The high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) reveals a remarkable segregation of solute Zn atoms along both high and low-angle grain boundaries (GBs). As compared with as-rolled plate, the yield strength, ultimate tensile strength, and the elongation of annealed sample is increased by 15.6%, 14%, and 8.4%, respectively, acquiring an obvious strength-ductility synergy effect. The solute segregation endows the rolled plate with excellent grain size stability and provides a prominent extra solute cluster strengthening, which completely resists the other softening effects including dislocation annihilation and grain coarsening. Meanwhile, the directional migration of Zn atoms and the annihilation of dislocations provide a “clear” space within the grain, which is beneficial for the moving and accumulating of subsequent dislocations. This work sheds light on the solute partitioning behavior and realizes a good application of GB segregation in improving the comprehensive mechanical properties of Mg alloys.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 7","pages":"Pages 1523-1534"},"PeriodicalIF":5.2,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470957","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}

引用次数: 0

Influence of pH on impurities in preparation of lanthanum cerium carbonate by magnesium bicarbonate precipitation 碳酸氢镁沉淀法制备碳酸镧铈时pH对杂质的影响

IF 5.2 1区化学

Journal of Rare Earths Pub Date : 2024-12-05 DOI: 10.1016/j.jre.2024.12.001

Chunguang Song , Meng Wang , Haiqing Hao , Yongke Hou , Zongyu Feng , Yanyan Zhao , Zhihe Dou , Xiaowei Huang

{"title":"Influence of pH on impurities in preparation of lanthanum cerium carbonate by magnesium bicarbonate precipitation","authors":"Chunguang Song , Meng Wang , Haiqing Hao , Yongke Hou , Zongyu Feng , Yanyan Zhao , Zhihe Dou , Xiaowei Huang","doi":"10.1016/j.jre.2024.12.001","DOIUrl":"10.1016/j.jre.2024.12.001","url":null,"abstract":"<div><div>To solve the problem of ammonia wastewater pollution generated from preparing rare earth carbonate using the ammonium bicarbonate precipitation method, an eco-friendly precipitant, magnesium bicarbonate, was used to prepare lanthanum cerium carbonate. The lanthanum cerium sulfate solution obtained from the smelting and separation of Baotou mixed rare earth ore was used as the raw material. The influence of pH on the content of impurities, including SO<sub>4</sub><sup>2–</sup> and magnesium, and the existing states of SO<sub>4</sub><sup>2–</sup> in lanthanum cerium carbonate products, as well as the thermal decomposition behavior of the products, were deeply explored. SO<sub>4</sub><sup>2–</sup> mainly exists in the form of rare earth sulfate complex salts in lanthanum cerium carbonate products. The formation of the salts can be effectively avoided by adjusting the pH of the precipitation process. Then the content of SO<sub>4</sub><sup>2–</sup> in the product is controlled. When the pH ranges from 6.00 to 7.12, the content of SO<sub>4</sub><sup>2–</sup> in the product ranges from 0.42 wt% to 0.99 wt%. The content of MgO is lower than 0.04 wt%. Both contents meet the requirements of the national standard GB/T 16479-2020. In this study, lanthanum cerium carbonate products with low-content SO<sub>4</sub><sup>2–</sup> were prepared. In addition, the existing states of SO<sub>4</sub><sup>2–</sup> in the products are revealed. The research provides a new method for controlling the impurity content in preparing lanthanum cerium carbonate.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 5","pages":"Pages 1067-1073"},"PeriodicalIF":5.2,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873386","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}

引用次数: 0

Efficient and stable silver-europium codoped lead-free double perovskite nanocrystals for warm-white emission 高效稳定的银铕共掺无铅双钙钛矿纳米晶体

IF 5.2 1区化学

Journal of Rare Earths Pub Date : 2024-12-05 DOI: 10.1016/j.jre.2024.12.002

Ruixiang Wu , Fengjie Guo , Zixuan Wang , Jiayu Di , Cheng Li , Ruiling Zhang , Peigeng Han , Yujing Wang , Xilin Bai , Junfeng Zhang , Xiangyang Miao

{"title":"Efficient and stable silver-europium codoped lead-free double perovskite nanocrystals for warm-white emission","authors":"Ruixiang Wu , Fengjie Guo , Zixuan Wang , Jiayu Di , Cheng Li , Ruiling Zhang , Peigeng Han , Yujing Wang , Xilin Bai , Junfeng Zhang , Xiangyang Miao","doi":"10.1016/j.jre.2024.12.002","DOIUrl":"10.1016/j.jre.2024.12.002","url":null,"abstract":"<div><div>Owing to their unique optical properties and nontoxicity, lead-free halide double perovskite nanocrystals are of interest for widespread applications. Herein, the colloid synthesis and photoluminescence property of Ag<sup>+</sup>-Eu<sup>3+</sup> codoped Cs<sub>2</sub>NaInCl<sub>6</sub> nanocrystals were investigated. The perovskite nanocrystals exhibit a broad warm-white photoluminescence with correlated color temperature (CCT) of 3447 K and color rendering index (CRI) of 90.2, and the means of codoping would improve its optical performance. A fast energy transfer and a long-lived self-trapped excitons state are unveiled by the femtosecond transient absorption spectra. The fast energy transfer from the self-trapped excitons of host nanocrystals to the Eu<sup>3+</sup> ions is helpful to achieve a broad photoluminescence, and the quantum yield of Cs<sub>2</sub>NaInCl<sub>6</sub>:0.05Ag<sup>+</sup>-Eu<sup>3+</sup> nanocrystals can be enhanced to 69.5%. There is a large exciton binding energy and strong electron-phonon interaction in the codoped perovskite nanocrystals. The efficient and excellent air-stable double perovskite nanocrystals would be considered as a single-component phosphor for warm-white lighting.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 5","pages":"Pages 882-887"},"PeriodicalIF":5.2,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873566","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}

引用次数: 0

Facile one-pot synthesis of B-g-C3N4-Ce (wt%) composite with outstanding pseudocapacitance contribution 具有优异赝电容贡献的B-g-C3N4-Ce （wt%）复合材料的简易一锅合成

IF 7.2 1区化学

Journal of Rare Earths Pub Date : 2024-11-28 DOI: 10.1016/j.jre.2024.11.019

Vandana Sairaj, Akshay Sidhi Poovethamkandiyil, Fabeena Jahan Jaleel, Athul Puthiya Purayil, Anjali Paravannoor, Baiju Kizhakkekilikoodayil Vijayan

{"title":"Facile one-pot synthesis of B-g-C3N4-Ce (wt%) composite with outstanding pseudocapacitance contribution","authors":"Vandana Sairaj, Akshay Sidhi Poovethamkandiyil, Fabeena Jahan Jaleel, Athul Puthiya Purayil, Anjali Paravannoor, Baiju Kizhakkekilikoodayil Vijayan","doi":"10.1016/j.jre.2024.11.019","DOIUrl":"10.1016/j.jre.2024.11.019","url":null,"abstract":"<div><div>Rare earth metal oxides possess unique electronic properties, which are highly desirable for the fabrication of pseudocapacitor electrodes. The present study demonstrates the synthesis of boron doped graphitic carbon nitride composite with varying concentrations of cerium (B-g-C<sub>3</sub>N<sub>4</sub>-Ce (wt%)) via a facile one-pot method. A detailed investigation was carried out to elucidate the effects of doping as well as the amount of cerium on the active electrode structure. The structure and morphology of the samples were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The structural and morphological analysis suggests the incorporation of boron into the graphitic carbon nitride phase, with spherical cerium oxide particles being embedded homogeneously in that matrix. Electrochemical characterization of the samples was carried out using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) and it is found that in-between the potential window of 0–0.45 V in a 3 mol/L potassium hydroxide (KOH) electrolyte, the B-g-C<sub>3</sub>N<sub>4</sub>-Ce (3%) composite displays a superior specific capacitance value of 1826.7 F/g at a current density of 1.5 A/g. The B-g-C<sub>3</sub>N<sub>4</sub>-Ce (3%) demonstrates excellent pseudocapacitance behavior with a high pseudocapacitance contribution. At current densities of 7.5 A/g, the heterostructure composite B-g-C<sub>3</sub>N<sub>4</sub>-Ce (3%) shows capacitance retention of 87% after 10000 cycles. The synergistic contribution of the individual components of the composite is explained for a better understanding of the capacitive mechanism.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2212-2221"},"PeriodicalIF":7.2,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157533","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}

引用次数: 0

Structural, magnetic, and magnetostrictive properties of Prx(Tb0.27Dy0.73)1‒xFe1.95 polycrystalline Prx(Tb0.27Dy0.73) 1-xFe1.95多晶的结构、磁性和磁致伸缩性能

IF 5.2 1区化学

Journal of Rare Earths Pub Date : 2024-11-12 DOI: 10.1016/j.jre.2024.11.012

Yan Di , Songlin Hu , Xingyu Wei , Chengdong Liu , Zuoyu Qu , Tongyun Zhao , Zhiyi Xu

{"title":"Structural, magnetic, and magnetostrictive properties of Prx(Tb0.27Dy0.73)1‒xFe1.95 polycrystalline","authors":"Yan Di , Songlin Hu , Xingyu Wei , Chengdong Liu , Zuoyu Qu , Tongyun Zhao , Zhiyi Xu","doi":"10.1016/j.jre.2024.11.012","DOIUrl":"10.1016/j.jre.2024.11.012","url":null,"abstract":"<div><div>Magnetostriction materials are a significant kind of magnetic functional materials, while RFe<sub>2</sub> (R = rare earth) compounds, especially Tb<sub>0.27</sub>Dy<sub>0.73</sub>Fe<sub>2</sub>, with cubic Laves phase structure, are the most famous. In this work, polycrystalline Pr<sub><em>x</em></sub>(Tb<sub>0.27</sub>Dy<sub>0.73</sub>)<sub>1–<em>x</em></sub>Fe<sub>1.95</sub> (<em>x</em> = 0, 0.05, 0.10, 0.15, 0.2, 0.25) alloys were synthesized to explore the influence of adding Pr on the structural, magnetic and magnetostrictive properties of Tb<sub>0.27</sub>Dy<sub>0.73</sub>Fe<sub>1.95</sub>. The results show that Pr<sub><em>x</em></sub>(Tb<sub>0.27</sub>Dy<sub>0.73</sub>)<sub>1–<em>x</em></sub>Fe<sub>1.95</sub> alloys can form the C15 Laves phase when <em>x</em> ≤ 0.2. Meanwhile, the samples with a Pr content of up to 0.1 exhibit a higher saturation magnetostriction compared to the Pr-free sample. As the content of Pr in Pr<sub><em>x</em></sub>(Tb<sub>0.27</sub>Dy<sub>0.73</sub>)<sub>1–<em>x</em></sub>Fe<sub>1.95</sub> rises from 0 to 0.1, the saturation magnetostriction, <em>λ</em><sub>s</sub>, improves from 1057 ppm to 1147 ppm. The apparent enhancement of the magnetostrictive property of Tb<sub>0.27</sub>Dy<sub>0.73</sub>Fe<sub>1.95</sub> reveals the great potential of (Pr,Tb,Dy)Fe<sub>2</sub> to become a widely-used magnetostriction material. Larger lattice distortion of the material itself leads to an increase in magnetostriction.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 7","pages":"Pages 1465-1471"},"PeriodicalIF":5.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471003","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}

引用次数: 0

One-dimensional rare-earth La-MOFs coordinated with Co-hexamethylenetetramine MOFs-derived highly efficient catalyst for cascade reaction of nitroarenes with alcohols 一维稀土la - mof与co -六亚甲基四胺mofs配位制备的硝基芳烃与醇级联反应高效催化剂

IF 7.2 1区化学

Journal of Rare Earths Pub Date : 2024-11-08 DOI: 10.1016/j.jre.2024.11.008

Danfeng Deng , Wenjing Song , Weizuo Li , Qiang Li , Xin Wang

{"title":"One-dimensional rare-earth La-MOFs coordinated with Co-hexamethylenetetramine MOFs-derived highly efficient catalyst for cascade reaction of nitroarenes with alcohols","authors":"Danfeng Deng , Wenjing Song , Weizuo Li , Qiang Li , Xin Wang","doi":"10.1016/j.jre.2024.11.008","DOIUrl":"10.1016/j.jre.2024.11.008","url":null,"abstract":"<div><div>A composite metal–organic frameworks (MOFs) structure, designated as Co-hmta@La-salen, was synthesized through coordination interactions between a one-dimensional lanthanum MOFs (La-salen) with high density of uncoordinated imine (–CH=N–) groups and a cobalt-based MOFs (Co-hmta) structure prepared using hydrogen bonding stacking with hexamethylenetetramine (hmta) as the organic ligand. Subsequently, the Co-hmta@La-salen composite was chosen as a template for the pyrolysis process to synthesize a La(OH)<sub>3</sub> supported metallic Co catalyst incorporating carbon-nitrogen (Co/La(OH)<sub>3</sub>-CN-hmta) catalyst. The catalytic results show that Co/La(OH)<sub>3</sub>-CN-hmta (54% and 46% selectivity for aniline and N-phenylbenzylamine, respectively) displays superior cascade performance compared to classic Co/La(OH)<sub>3</sub>-CN-nit catalyst (69% and 31% selectivity for aniline and N-phenylbenzylamine, respectively). Moreover, the kinetic test results indicate that N-alkylation is the rate-limiting step of the overall cascade reaction. The Co/La(OH)<sub>3</sub>-CN-hmta catalyst can be separated from the reaction system using a magnet, and it also exhibits good cyclic stability. All of these suggest that the “MOFs plus MOFs via coordination” templating method can be employed as an efficient strategy for the preparation of supported catalysts.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2145-2154"},"PeriodicalIF":7.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157050","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}

引用次数: 0

Extraction of rare earth elements from ion adsorption clay using bio-based ionic liquid via COSMO-RS: Computational and experimental validation 生物基离子液体COSMO-RS萃取离子吸附粘土中的稀土元素：计算与实验验证

IF 7.2 1区化学

Journal of Rare Earths Pub Date : 2024-11-08 DOI: 10.1016/j.jre.2024.11.002

Junaid Afridi , M.D.H. Wirzal , C.Y. Foong , M. Azmi Bustam , N.S. Abd Halim , Nur Insyirah , A.S. Abdul Manaf , S. Mohd Hizam , M.A. Firdaus , M. Irfan Khan , H. Warsi Khan , M. Usman

{"title":"Extraction of rare earth elements from ion adsorption clay using bio-based ionic liquid via COSMO-RS: Computational and experimental validation","authors":"Junaid Afridi , M.D.H. Wirzal , C.Y. Foong , M. Azmi Bustam , N.S. Abd Halim , Nur Insyirah , A.S. Abdul Manaf , S. Mohd Hizam , M.A. Firdaus , M. Irfan Khan , H. Warsi Khan , M. Usman","doi":"10.1016/j.jre.2024.11.002","DOIUrl":"10.1016/j.jre.2024.11.002","url":null,"abstract":"<div><div>The study introduces eco-friendly leaching agents as alternatives to traditional rare earth element (REE) extraction solvents, addressing environmental concerns associated with ammonium sulfate. Bio-based ionic liquids (ILs), known for their non-toxic and biodegradable properties, were screened using the COSMO-RS software. Initially, 105 ILs involving 7 cations and 15 anions were computationally screened to find the best ILs for REE extraction. The chosen criteria were based on hydrogen bond formation, affinity screening, hydrophobicity, viscosity, and eco-toxicity test. Based on the COSMO-RS screening, choline oleate, choline decanoate, and choline hexanoate exhibit high solubility for REEs, with a chemical potential of 17.60, 17.01, and 18.37 kcal/mol at REE oxidation state +2. Choline glycinate, choline oleate, choline decanoate, choline hexanoate, choline lysinate, and choline leucinate were selected for their strong affinity to extract REE dissociate ions. Experimental results show slightly higher REE extraction from ammonium sulfate (3.17 ppm) compared to choline glycinate (3.15 ppm). For long-term applications, choline glycinate offers a promising eco-friendly and cost-effective alternative to traditional leaching agents, promoting economic feasibility and environmental friendliness.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2276-2284"},"PeriodicalIF":7.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157496","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}

引用次数: 0

Gd3Ga5O12: A wide bandgap semiconductor electrolyte for ceramic fuel cells, effective at temperatures below 500 °C Gd3Ga5O12：用于陶瓷燃料电池的宽带隙半导体电解质，在低于500°C的温度下有效

IF 7.2 1区化学

Journal of Rare Earths Pub Date : 2024-10-29 DOI: 10.1016/j.jre.2024.10.004

Junjiao Li , Muhammad Yousaf , Jahangeer Ahmed , Bushra Bibi , Asma Noor , Norah Alhokbany , Muhammad Sajid , Atif Nazar , M.A.K. Yousaf Shah , Xiaofeng Guo , Xiangqin Ding , Naveed Mushtaq , Yuzheng Lu

{"title":"Gd3Ga5O12: A wide bandgap semiconductor electrolyte for ceramic fuel cells, effective at temperatures below 500 °C","authors":"Junjiao Li , Muhammad Yousaf , Jahangeer Ahmed , Bushra Bibi , Asma Noor , Norah Alhokbany , Muhammad Sajid , Atif Nazar , M.A.K. Yousaf Shah , Xiaofeng Guo , Xiangqin Ding , Naveed Mushtaq , Yuzheng Lu","doi":"10.1016/j.jre.2024.10.004","DOIUrl":"10.1016/j.jre.2024.10.004","url":null,"abstract":"<div><div>Searching for compatible electrolytes with Ni<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>LiO<sub>2</sub><sub>–</sub><sub>δ</sub> (NCAL) electrodes that exhibit high ionic conductivity at low operational temperatures (<550 °C) is crucial for advancing ceramics fuel cells (CFCs) research. In this work, the experimental and theoretical analyses demonstrate that the highly stable single-phase Gd<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub> (GGO) garnet structure, composed of Gd–O octahedrons and Ga–O tetrahedrons, provides more active sites for ion transport, resulting in enhanced peak power density (PPD) and stable open circuit voltage (OCV) at low operational temperatures. The unique internal garnet structure effectively reduces the interfacial impedance of the prepared fuel cell device, provides more active sites at triple-phase boundarie region, and increases the electrochemical stability. As a result, the constructed fuel cell device can deliver a superior peak power density of 770 mW/cm<sup>2</sup> at 490 °C. In addition, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and theoretical calculations further demonstrate electrolyte effectiveness of GGO, enabling stable an OCV even at a low temperature of 370 °C under a H<sub>2</sub>/air environment. This work contributes to a deeper understanding of the underlying mechanisms of a single-layer fuel cell device, which is essential for advancing this promising energy technology, even at a very low temperature of 370 °C.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2248-2256"},"PeriodicalIF":7.2,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157589","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}

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