Article
Chemistry, Applied
Quansheng Wu, Yujie Xie, Fang She, Quan Zhao, Jianyan Ding, Jiangcong Zhou
Summary: The CsBaB3O6:Eu3+ phosphor exhibits excellent optical properties and thermal stability, making it suitable for applications in LED and FED.
JOURNAL OF RARE EARTHS
(2021)
Article
Materials Science, Ceramics
Harishkumarreddy Patnam, Sk Khaja Hussain, Jae Su Yu
Summary: Recently, rare-earth (RE)-free ions (Mn4+) activated phosphor materials, such as double perovskite-type Ba2YSbO6 (BYSO:Mn4+), have gained attention as an alternative source for multi-functional applications. In this study, novel RE-free Mn4+ activated BYSO phosphor materials were prepared using a solid-state reaction method. The BYSO:8Mn4+ phosphors exhibited broad far-red emission under 353 nm excitation, with a maximum intensity at 694 nm, making it beneficial for plant growth.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
S. Pavon, B. Lapo, A. Fortuny, A. M. Sastre, M. Bertau
Summary: Rare earth elements are considered crucial for future sustainable applications due to their high demand and importance. A successful three-step process for recovering and separating RE from fluorescent lamp wastes has been optimized, contributing to reducing chemicals consumption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Applied
Jie Wang, Xiusha Peng, Danzhao Cheng, Zhigang Zheng, Hai Guo
Summary: Single-phase Y2BaAl4SiO12:Tb3+,Eu3+ phosphors with adjustable luminescence were successfully prepared by solid-state reaction method, showing tunable luminescence from green to red with increasing Eu3+ ions. The maximum energy transfer efficiency was found to be 67%, indicating potential applications in solid-state lighting.
JOURNAL OF RARE EARTHS
(2021)
Review
Chemistry, Applied
Qian Zhang, Zhiqing Gao, Xiaomeng Shi, Chao Zhang, Kang Liu, Jun Zhang, Liang Zhou, Chunjie Ma, Yaping Du
Summary: Rare earth elements play a crucial role in solid-state lithium-ion-conducting materials and have great application potential. They act differently in various systems and also show effects as dopants. The crystal structure and property of these materials are influenced by factors such as valence, coordination, and size.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Applied
Chen Yang, Chenli Fan, Fayaz Hussain, Weiqing Sheng, Kaixin Song, Jun Wu, Qingming Huang, Weitao Su, Junming Xu, Shikuan Sun, Dawei Wang
Summary: LMZ:Bi3+ and LMZ:Bi3+,Eu3+ double-perovskite phosphors were prepared through high-temperature solid-phase method, and the emission spectra were analyzed. It was found that the emission color can be tuned from green to blue by different excitation wavelengths, and red emission can be obtained by co-doping Bi3+/Eu3+ with adjustable emission color. These results are attractive for future applications of double-perovskite phosphors.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Multidisciplinary
Ziliang Li, Zhengtao Deng, Andrew Johnston, Jingwei Luo, Haijie Chen, Yitong Dong, Randy Sabatini, Edward H. Sargent
Summary: This study reports the synthesis of lead-free reduced-dimensional perovskite phosphors with broadband self-trapped emission and a large Stokes shift in an air ambient. White-light-emitting diodes (WLEDs) based on these phosphors show warm-white emission suited for home lighting, with high photoluminescence quantum yield and CRI.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Yunping Huang, Theodore A. Cohen, Christine K. Luscombe
Summary: Organic hybrid LEDs using theobromine dyes as an alternative to REE phosphors have achieved high color rendering and fidelity indices of 90 and 92. The cost-effective light-converting composite made from 99% SBS and 1% theobromine dyes has a light conversion efficiency of 82%. Excited state kinetics experiments are conducted to further enhance the light-converting efficiency while maintaining excellent color reproduction.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Review
Materials Science, Ceramics
Mengting He, Jiannan Jia, Junjie Zhao, Xvsheng Qiao, Jincheng Du, Xianping Fan
Summary: This review summarized the recent progress on LED/LD GC phosphors, focusing on design principles, synthesis methods, microstructure-property relationships, and application studies. It also discussed challenging issues and suggested potential research directions for developing new glass-ceramic phosphors and practical applications.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Neha Shukla, Nikhil Dhawan
Summary: This study investigates the extraction of rare earth elements (REE) from phosphor samples using different processing routes. The results show that acid leaching and alkali baking methods have different effects on different phosphor types. Acid leaching is more effective for extracting REE from CFL phosphor, while alkali baking is better for TL phosphor. Transmission electron microscopy results indicate the formation of polycrystalline sites, improving the recovery of REE.
MINERALS ENGINEERING
(2022)
Article
Engineering, Environmental
S. Pavon, T. Lorenz, A. Fortuny, A. M. Sastre, M. Bertau
Summary: The processing and recovery of end-of-life products containing rare earth elements (REE) have become increasingly important, with solid-state chlorination proving to be an efficient and cost-effective technology. By optimizing the solid-state chlorination process, it is possible to achieve high efficiency and selective recovery of rare earth elements.
Article
Optics
Qi Li, Wenge Xiao, Dao Zhang, Dandan Wang, Guojun Zheng, Jianrong Qiu
Summary: This study reports a new type of phosphor-converted solid-state light source with high internal quantum efficiency and excellent stability, achieved through an ultrathin interface between Lu3Al5O12:Ce3+ phosphor material and silica glass. The resulting LED/LD devices exhibit high luminous efficiency and brightness, approaching the performance of ceramic materials.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Xiaomeng Shi, Zhichao Zeng, Hongtu Zhang, Yunhui Huang, Chun-Hua Yan, Yaping Du
Summary: Rare earth-based halide solid electrolytes (RE-HSEs) are promising due to their comprehensive properties. A highly purified RE-HSE Li3ErBr6 (LErB) with high ionic conductivity and electrochemical window is successfully synthesized. The LErB is used in a solid Li-SeS2 battery, showing stable cycling performance and good rate performance. The assembled pouch-type cell with LErB can light a diode array after bending and cutting, proving the practicality of LErB-based Li-SeS2 cells in battery packaging and operation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Ganji Seeta Rama Raju, Eluri Pavitra, Seung Kyu Hwang, Young Hyun Song, Jin Young Park, Nilesh R. Chodankar, Kugalur Shanmugam Ranjith, Yun Suk Huh, Young-Kyu Han
Summary: Ongoing efforts are being made to develop novel phosphors with natural-looking properties under sunlight. Rare-earth pyrosilicates, such as La2Si2O7 (LSO), are considered as promising scintillators and protective pigments due to their stability. This study successfully developed Eu3+-activated dumbbell-shaped LSO nanocrystalline phosphors, exhibiting strong red emission under UV excitation and chromaticity coordinates in the reddish-orange region.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Yuichiro Watanabe, Benjamin M. Washer, Matthias Zeller, Sergei Savikhin, Lyudmila Slipchenko, Alexander Wei
Summary: This study describes a novel manifestation of rigidochromic behavior in a series of tetranuclear Cu(I)-pyrazolate macrocycles, with implications for solid-state luminescence. The findings reveal that the structural effects far from the luminescent core significantly impact the emissions, with the addition of a C4 substituent inducing a blue shift. Additionally, the emissions are primarily mediated through a cluster-centered triplet state.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Applied
Alberto Luridiana, Angelo Frongia, Mariano Andrea Scorciapino, Giuliano Malloci, Barbara Manconi, Simone Serrao, Pier Carlo Ricci, Francesco Secci
Summary: A Z-selective cascade reaction was developed for the synthesis of various aryl- and alkylthio enone derivatives, with good functional group tolerance and limitations identified through accurate reaction conditions screening. The utility of this methodology was demonstrated through the stereoselective synthesis of cyclopropyl ketones, indanones, and pyrazole compounds from alpha-sulfanyl-enone adducts.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Physical
Chiara Olla, Stefania Porcu, Francesco Secci, Pier Carlo Ricci, Carlo Maria Carbonaro
Summary: This study investigated the possibility of introducing N-N bonding in the carbon network of Carbon Dots through hydrothermal synthesis, and validated it through experiments and computational simulations.
Article
Chemistry, Analytical
Stefania Porcu, Enrica Tuveri, Marco Palanca, Claudia Melis, Ignazio Macellaro La Franca, Jessica Satta, Daniele Chiriu, Carlo Maria Carbonaro, Pierluigi Cortis, Antonio De Agostini, Pier Carlo Ricci
Summary: In this study, Raman spectroscopy was used to analyze cannabis samples, and the results showed high reproducibility and the ability to immediately distinguish the Raman spectra of different cannabinoids. Additionally, the ratio between specific Raman bands can be used to evaluate the THC content in the samples.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Organic
Stefania Porcu, Maria Chiara Cabua, Viktoria Velichko, Jean-Pierre Baltaze, Angelo Frongia, Carlo Maria Carbonaro, Pier Carlo Ricci, Drew Francis Parsons, Armando Carlone, Francesco Secci
Summary: A general strategy for the synthesis of 2-substituted cyclobutanone sulfides has been developed, which involves a tandem reaction sequence. The reaction mechanism and kinetic parameters were investigated to rationalize the reactivity of different reactants.
SYNTHESIS-STUTTGART
(2022)
Article
Chemistry, Physical
Francesca Assunta Assunta Pisu, Pier Carlo Ricci, Stefania Porcu, Carlo Maria Carbonaro, Daniele Chiriu
Summary: Cadmium yellow degradation is a common issue in paintings from the 19th to 20th centuries, but the degradation process and its kinetics are not fully understood. In order to improve the understanding of this process, researchers studied mock-up samples of yellow and orange CdS using structural analysis and optical characterization techniques. The samples were artificially degraded with heat treatment and UV exposure. Results showed colorimetric variation and the formation of a defective phase during the degradation of cadmium yellow.
Article
Crystallography
Jessica Satta, Andrea Pinna, Giorgio Pia, Luca Pilia, Carlo Maria Carbonaro, Daniele Chiriu, Luigi Stagi, Qader Abdulqader Abdullah, Pier Carlo Ricci
Summary: This paper studies the combination of nanocrystals and nanoporous gold to create an optimal metal semiconductor heterojunction for photocatalysis and photovoltaic devices. The results show that synthesizing the nanocrystals directly onto the gold porous structure can increase charge separation efficiency and maintain high structural stability.
Review
Biochemistry & Molecular Biology
Stefania Porcu, Francesco Secci, Pier Carlo Ricci
Summary: Heterogeneous photocatalysts have gained significant attention as a sustainable technology for environmental remediation and energy storage processes. The use of solar radiation for photocatalysis can reduce energy demand and mitigate the impact of anthropogenic pollutants. However, the development of new photocatalysts with high efficiency in the visible range is necessary. Hybrid organic/inorganic photocatalysts have emerged as promising materials to improve visible photocatalytic efficiency. This review discusses the state-of-the-art and developments of hybrid photocatalysts for energy storage, energy conversion, pollutant degradation, and water treatment applications.
Article
Materials Science, Multidisciplinary
C. O. Saeed, A. A. Qader, S. B. Aziz, P. Carlo Ricci
Summary: This paper reports experimental investigations on the effects of various parameters on visible laser beam attenuation characteristics for organic pure polyethylene oxide (PEO) thin films. The results show that the DPSS laser beam with linear polarization has greater attenuation characteristics compared to other control parameters.
Article
Chemistry, Physical
F. A. Pisu, M. Marceddu, P. C. Ricci, C. Melis, S. Porcu, C. M. Carbonaro, D. Chiriu
Summary: In this study, Transient Absorption (TA) spectroscopy was used to investigate the darkening process of Red Vermilion pigment. Changes in optical properties before and after UV exposure were studied in pure HgS and chlorine doped HgS samples. The study revealed the role of defects and energy band gap reduction in the pigment degradation process.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Chiara Olla, Pier Carlo Ricci, Daniele Chiriu, Marzia Fantauzzi, Maria Francesca Casula, Francesca Mocci, Antonio Cappai, Stefania Porcu, Luigi Stagi, Carlo Maria Carbonaro
Summary: This study investigates the fluorescence features of citric acid and urea-based Carbon Dots (CDs) synthesized within silica matrices. The hybrids show a broader green emission compared to CDs dispersed in water, and UV and blue laser irradiation can enhance the green emission. The synthesis in different silica matrices affects the composition of CDs, resulting in larger content of graphitic N and imidic groups. The porous silica matrix also plays a role in the photo-assisted formation process of the hybrids.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Franca C. Ugbo, Stefania Porcu, Riccardo Corpino, Andrea Pinna, Carlo Maria Carbonaro, Daniele Chiriu, Philippe F. Smet, Pier Carlo Ricci
Summary: Recent developments in lighting and display technologies have increased the focus on materials and phosphors with high efficiency and eco-friendliness. Mechanoluminescence (ML) is a promising technology in pressure sensors and displays. CaZnOS has been identified as an efficient ML material with potential applications as a stress sensor. This study optimized the mechanoluminescent properties of CaZnOS:Tb through microwave-assisted synthesis, and the results showed that materials synthesized through microwave methods exhibit similar optical and mechanoluminescent properties.
Article
Polymer Science
Stefania Porcu, Stefania Maloccu, Angela Corona, Moulika Hazra, Tullia Carla David, Daniele Chiriu, Carlo Maria Carbonaro, Enzo Tramontano, Pier Carlo Ricci
Summary: It is well known that viruses cannot replicate on their own but only inside the cells of target tissues, causing cell destruction or transformation into cancer cells. Recently, it has been found that the Phenyl carbon nitride/TiO2 heterojunction photocatalyst can effectively degrade the flu virus. The hybrid photocatalyst, activated by white light, demonstrates its ability to safely and efficiently inactivate the virus in the visible light range, highlighting its advantages over traditional inorganic photocatalysts.
Article
Chemistry, Multidisciplinary
Chiara Olla, Antonio Cappai, Stefania Porcu, Luigi Stagi, Marzia Fantauzzi, Maria Francesca Casula, Francesca Mocci, Riccardo Corpino, Daniele Chiriu, Pier Carlo Ricci, Carlo Maria Carbonaro
Summary: This study investigates the differences between bare carbon dots (CDs) and nitrogen-doped CDs synthesized from citric acid as a precursor, aiming to understand the mechanisms of emission and the role of the doping atoms in shaping the optical properties. It is found that nitrogen doping causes a decrease in the relative content of O-containing functional groups and the formation of N-related molecular and surface centers that enhance the quantum yield of the material.
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Pier Carlo Ricci, Khachatur V. Manukyan
Summary: A processing route combining Solution Combustion Synthesis (SCS) and Spark Plasma Sintering (SPS) was proposed for the fabrication of bulk nanostructured biphasic calcium phosphates. The apatite phase content was maximized using SCS with a fuel to oxidizer ratio of 1.1. After air-annealing at 700 degrees C/3 h, the powders consisted of carbonated apatite, α-TCP, and β-TCP. Sintering at 900 degrees C retained the original nanostructure, resulting in nearly 91% dense, apatite-rich, biphasic bioceramics with grain size around 100 nm.
CERAMICS INTERNATIONAL
(2023)
Article
Electrochemistry
Giampaolo Lacarbonara, Luigi Faggiano, Stefania Porcu, Pier Carlo Ricci, Stefania Rapino, Declan P. Casey, James F. Rohan, Catia Arbizzani
Summary: Basic studies on concentrated solutions are increasingly important for practical applications, with redox flow batteries being one of the most significant applications. This paper investigated high-concentrated copper chloro-complexes solutions with different additives, finding that certain additives can improve the reversibility of copper deposition-stripping process and increase the stability of the depositing solution.