Article
Chemistry, Multidisciplinary
Lanlan Shi, Yuji Sano, Naoto Takahata, Mizuho Koike, Takuya Morita, Yuta Koyama, Takanori Kagoshima, Yuan Li, Sheng Xu, Congqiang Liu
Summary: In this study, a method was developed to analyze rare earth elements in silicate glasses and zircon minerals using NanoSIMS. The results obtained through experiments and calibration provide information about the content and partition coefficients of these elements. The findings suggest a positive relationship between the secondary ion yields of rare earth elements and their ionization potentials.
FRONTIERS IN CHEMISTRY
(2022)
Article
Energy & Fuels
Juanjuan Ma, Shuyan Li, Jinxi Wang, Shuting Jiang, Balaji Panchal, Yuzhuang Sun
Summary: This study optimized the culture conditions and bioleaching process of Aspergillus niger for the extraction of rare earth elements (REEs) from coal fly ash (CFA). It was found that organic nitrogen sources influenced the morphology and acid production capacity of A. niger, with oxalic acid being the main acid secreted (4.05 mg/L). The initial pH value was identified as the most influential factor affecting the bioleaching process, and by optimizing it, a leaching rate of 30.91% for total REEs in CFA was achieved. The main mechanism of REEs bioleaching by A. niger from CFA was speculated to be proton exchange and organic ligand complexation.
Article
Biotechnology & Applied Microbiology
Michael Paper, Max Koch, Patrick Jung, Michael Lakatos, Tom Nilges, Thomas B. Brueck
Summary: This study investigated the potential of 12 cyanobacterial strains for biosorption of rare earth elements, and Nostoc sp. 20.02 showed the highest adsorption capacity. Synechococcus elongatus UTEX 2973, Calothrix brevissima SAG 34.79, Desmonostoc muscorum 90.03, and Komarekiella sp. 89.12 were also promising strains. The adsorption of metals by the strains had fast kinetics and pH value had a significant impact on the process.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Review
Engineering, Environmental
Emmanuel Yaw Owusu-Fordjour, Xinbo Yang
Summary: Bioleaching, using microorganisms to dissolve minerals and extract Rare Earth Elements (REEs) in aqueous media, has gained attention for its potential eco-friendliness compared to other extraction methods. Mixed culture bioleaching is preferred for efficient REEs extraction, promoting closed-loop recycling and reducing supply chain issues. This literature review provides an overview of challenges, opportunities, microorganisms, mechanisms, approaches, parameters, and techno-economic considerations related to REEs bioleaching, and offers recommendations for future advancements.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Olena Artiushenko, Raphael Freire da Silva, Volodymyr Zaitsev
Summary: Rare Earth elements (REEs) are crucial for high-tech and everyday consumer products. The demand for REEs has rapidly grown due to their use in high-tech and sustainable technologies. However, the REEs world market is at risk due to political tensions and low substitutability of REEs mining technology. This review focuses on the adsorptive recovery of REEs from solutions with high content of transition and heavy metals.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Environmental Sciences
Catia Figueiredo, Miguel Caetano, Mario Mil-Homens, Ines Tojeira, Joana R. Xavier, Rui Rosa, Joana Raimundo
Summary: The study characterizes rare earth elements and trace elements in five genera of deep-sea sponges collected in the North Atlantic. These sponges showed an increased accumulation of trace elements compared to other organisms, possibly influenced by volcanic activity. Additionally, a Light REE enrichment and a negative Ce anomaly were observed in all studied species, providing a baseline for future comparisons.
MARINE POLLUTION BULLETIN
(2021)
Review
Chemistry, Inorganic & Nuclear
Daniele Paderni, Luca Giorgi, Vieri Fusi, Mauro Formica, Gianluca Ambrosi, Mauro Micheloni
Summary: Rare earth elements (REEs) are a group of elements playing critical roles in modern applications, with scientists showing strong interests in their new applications. However, the development of chemical sensors suitable for selective sensing of REE ions remains a challenging task due to their complicated coordination properties.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Engineering, Chemical
Jinliang Wang, Huazhou Hu
Summary: A selective sulfation method was used to achieve efficient extraction of REEs and Li from rare earth fluoride molten-salt electrolytic slag, leaving Fe and Al in the residue as oxides. Impurities such as Fe, Al, and F were separated from the lixivium, enabling the production of REE oxalates with over 99% purity for direct use in subsequent precipitation processes.
MINERALS ENGINEERING
(2021)
Article
Environmental Sciences
Sabrina F. Lutke, Marcos L. S. Oliveira, Samuel R. Waechter, Luis F. O. Silva, Tito R. S. Cadaval, Fabio A. Duarte, Guilherme L. Dotto
Summary: This study investigates the leaching conditions and mechanisms of rare earth elements (REE) from phosphogypsum (PG). Through experimental design and optimization, high leaching efficiency values were obtained using sulfuric acid at a concentration of 2.9 mol L-1, a solid/liquid ratio of 1.7/20 g mL(-1), and a temperature of 55 C. The leaching kinetics results indicated that most REE reached equilibrium in about 20 minutes, and the mechanism investigation suggested that surface chemical reaction and diffusion through the boundary layer controlled the leaching process.
Article
Chemistry, Physical
Imran Ali, E. A. Zakharchenko, G. Myasoedova, N. P. Molochnikova, A. A. Rodionova, V. E. Baulin, A. E. Burakov, I. Burakova, A. Babkin, E. A. Neskoromnaya, A. Melezhik, A. G. Tkachev, Mohamed A. Habila, Adel El-Marghany, Mohamed Sheikh, Ayman Ghfar
Summary: This study focuses on the sorption behavior of oxidized multilayer graphene to actinides and rare earth elements in nitric acid solutions, and optimizes the conditions for obtaining new sorption materials. The efficiency of the obtained materials in solid-phase isolation and separation of actinides and REEs from nitric acid solutions is confirmed.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Andrew Turner, John W. Scott, Lee A. Green
Summary: Rare earth elements (REEs) were detected in consumer plastics, likely originating from recycled electronic plastics. Some plastics contained REEs even without detectable flame retardants markers, indicating a more generic source of these elements in consumer plastics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Tatiana Litvinova, Ruslan Kashurin, Denis Lutskiy
Summary: Rare earth metals are crucial for various industries, but their extraction from mineral raw materials poses technological and theoretical challenges. Existing thermodynamic and kinetic data are insufficient for describing detailed leaching and precipitation systems. This study focuses on the limited data available on carbonate-alkali systems of rare earth metals. Solubility isotherms of sparingly soluble carbonates are used to evaluate equilibrium constants, and a mathematical model is developed to accurately predict the water-salt composition. This research contributes to a better understanding of the extraction of rare earth elements and serves as a reference for studying water-salt thermodynamics.
Article
Polymer Science
Baiyi Shao, Xiaobao Zhang, Song Sang, Aoping Guo, Fangming Cui, Xiaojing Yang
Summary: The rare-earth hydroxides LEu(x)Tb(1-x)Hs nanosheets were stably isolated in polyvinyl alcohol (PVA) hydrogels via a freeze-thaw method, which inhibited the energy transfer from Tb3+ to Eu3+ and the Eu3+ concentration quenching effect, resulting in independent photoluminescence emissions of Eu3+ and Tb3+ and corresponding multicolor photoluminescence.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Geochemistry & Geophysics
Guanyu Zhao, Qian Deng, Xinyan Fang, Haozhe Wang, Bin Cheng, Zewen Liao
Summary: This study examines the composition of rare earth elements (REEs) in kerogen samples from South China and provides evidence that kerogens with heavy rare earth element (HREE) enrichment are uncontaminated and preserve unaltered REE signatures. The results suggest that the distribution patterns of REEs in kerogens are influenced by diagenesis and redox conditions, rather than being derived from oxic seawater.
Article
Environmental Sciences
Yahya R. Tahboub, Abd Al-Majeed A. Al-Ghzawi, Shaker S. Al-Zayafdneh, Mohammad S. AlGhotani
Summary: The study revealed variations in major and trace element levels in Jordanian honey, with local honey showing higher levels of strontium and total REEs, while imported honey had very low levels of toxic elements, indicating higher safety. Discrimination between imported and local honey would require analysis of a large number of samples (>100) and use of advanced statistical models.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)