Article
Engineering, Environmental
Yujian Zhang, Lizhi He, Guoqiao Wang, Xinxin Zhang, Ya Liu, Yao Chen
Summary: The research shows that NaOH can effectively regenerate AC-La while maintaining its high fluoride removal efficiency. After multiple NaOH regeneration processes, the regeneration rate of AC-La remains stable at over 73.8%. NaOH has little impact on the pore structure and lanthanum loading of AC-La, while enhancing ion exchange during the F- desorption process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Kirill Yusenko, Anke Kabelitz, Alexander Schoekel, Ralph Wagner, Carsten Prinz, Erhard Kemnitz, Franziska Emmerling, Thoralf Krahl, Ana Guilherme Buzanich
Summary: Rare-earth based luminescent materials, such as stable Eu3+-doped SrF2 nanoparticles prepared in this study, show changes in luminescence properties after heat treatment. The study also revealed an increase in crystallinity and particle size, as well as changes in local structure of the nanoparticles post-heat treatment.
Article
Engineering, Chemical
D. Ricardo Martinez-Vargas, E. R. Larios-Duran, Luis F. Chazaro-Ruiz, J. Rene Rangel-Mendez
Summary: This study investigated the electrosorption of fluoride using a commercial bituminous activated carbon impregnated with 0.45% w/w Lanthanum(III). The modified carbon showed higher adsorption capacity and velocity but required depolarization for efficient desorption due to a chemisorption mechanism. Surface charges, evaluated by pHPZC and EPZC, were crucial parameters in explaining the results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Anatomy & Morphology
Umit Erdem, Mustafa B. Turkoz
Summary: Hydroxyapatite co-doped with La^3+ and F^- ions was successfully synthesized and characterized. The material showed potential for dental applications based on its spectral, mechanical, and microstructure analysis results.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Materials Science, Multidisciplinary
Pablo Serna-Gallen, Hector Beltran-Mir, Eloisa Cordoncillo
Summary: This study presents a new method for synthesizing the delta-KY3F10·xH(2)O compound with a 'super-diamond' structure and demonstrates its potential for optical applications. The results highlight the material's impact on the future of photonics and related applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Polymer Science
Fei Gao, Xinyu Zhao, Jinglin Liu
Summary: Europium trivalent ion (Eu3+)-doped silica nanowires were prepared and the positioning of Eu3+ in the silicon dioxide nanowire matrix was investigated. The results indicate that Eu3+ was successfully doped into amorphous silica and exhibited high photoluminescent emission in the silica matrix.
Article
Engineering, Electrical & Electronic
M. H. Shaaban, Y. S. Rammah, Emad M. Ahmed, A. A. Ali
Summary: This study investigated the effects of adding different rare earth oxides on the physical, structural, thermal, and optical properties of Bi2O3-B2O3 glasses. The addition of rare earth led to the formation of BiO6 and BO4 groups, increasing the intensity of related peaks. The density of the glasses increased with the substitution of Na2O by rare earth oxide, and the addition of Yb2O3 resulted in changes in ionic concentration and optical properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Chemical
Jianmin Li, Yang Huang, Zhong Pan, Jiancong Ni, Weiqiang Yang, Yanhui Zhang, Ying Zhang, Yan Li
Summary: In this study, a novel one-pot method was proposed to fabricate carbonaceous nanosheets functionalized with amino groups, which exhibited large specific surface area and well-dispersed La(OH)(3). The material showed high selectivity and efficiency in phosphate removal, and the mechanisms involved surface precipitation, electrostatic attraction, hydrogen bonds, and inner-sphere complexation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Physical
Pablo Serna-Gallen, Hector Beltran-Mir, Eloisa Cordoncillo
Summary: Eu3+-doped YF3 and KY3F10 phosphors were prepared hydrothermally in a wide range of pH values without surface chelators, using dicarboxylic acids to modulate the evolution of the surface and crystal phases in the KF-YF3 system. The materials exhibited tunable photoluminescence with high quantum efficiencies, and the relationship between optical performance and physicochemical properties was established through calculations. This study could spark interest in the materials engineering community for advanced applications in various fields such as bioanalytics, biomedics, and photonics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
N. Luewarasirikul, S. Sarachai, J. Rajagukguk, J. Kaewkhao
Summary: In this study, Eu3+-doped oxide and oxyfluoride glasses were fabricated to investigate their optical and emission properties. The results showed that the oxyfluoride glass sample has higher lasing potential, and the emitted light is reddish-orange in color.
INTEGRATED FERROELECTRICS
(2023)
Article
Chemistry, Physical
Zhi Liu, Guangyan Xu, Lingyou Zeng, Wei Shi, Yingjie Wang, Yanwei Sun, Yunbo Yu, Hong He
Summary: We prepared a PtPd-La1/Al2O3 catalyst with highly dispersed La species and Pt-PdO nanoparticles, showing significantly enhanced hydrothermal and long-term stability under the harsh conditions of simulated natural gas vehicle (NGV) exhaust. PdO nanoparticles can be anchored by highly dispersed La sites through electron transfer, inhibiting the sintering of Pd species during hydrothermal aging. Pt uniformly doped in PdO creates high-efficiency Pt sites and unsaturated Pd sites for water-resistance, further enhancing long-term stability. This work provides the potential to resolve tough challenges related to methane emission control on NGVs.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Electrochemistry
Chuning Jiang, Xiangfeng Guo, Lihua Jia, Zhenlong Zhao, Rui Yang, Xiaoshuang Chen, Qingfang Deng
Summary: Sea-urchin-like LaF3 doped mesoporous Co3O4 nanomaterials were obtained through heat treatment, exhibiting excellent gas sensing performance. The high content of adsorbed oxygen from LaF3 doping and abundant porosity from hierarchical structure contribute to the sensors' superior selectivity and responsiveness.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Dalanda Hamdi, Lobna Mansouri, Varsha Srivastava, Mika Sillanpaa, Latifa Bousselmi
Summary: The addition of Eu to TiO2 photocatalysts showed the best enhancement in photoactivity performance for the removal of AB dye compared to Ce-TiO2 and pure TiO2 films. The optimal concentration for better electron/hole separation was found to be 1 wt% Ce or 0.1 wt% Eu doping in TiO2. EIS measurements demonstrated that Ce-TiO2(1 wt%) and Eu-TiO2(0.1 wt%) photocatalysts had lower electron transfer resistance than pure TiO2, leading to more effective separation of electron/hole pairs during photodegradation reactions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Physics, Applied
Rui Wan, Pengfei Wang, Shengwu Li, Yuan Ma, Guangwei Zhang
Summary: ErF3-doped TGBAY glasses were developed with high fluorescence efficiency and thermal damage threshold for potential mid-infrared fiber laser applications. A 2.7-mu m fiber laser based on this material exhibited fluorescence emissions at 1.55 and 2.73 mu m under laser pumping, with intensity parameters and radiative transition property characterized through absorption and emission spectra.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Optics
Hai Ma, Xiaodan Wang, Feifei Chen, Jiafan Chen, Xionghui Zeng, Xiaodong Gao, Dan Wang, Hongmin Mao, Ke Xu
Summary: Eu3+, Tm3+ co-doped AlN thin films were prepared for the first time through ion implantation, and their luminescence properties were investigated. Both rare-earth ions could be efficiently excited under high-energy electron beam, with emission intensity varying with dose ratio.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Emille M. Rodrigues, Nicholas D. Calvert, Justin C. Crawford, Nan Liu, Adam J. Shuhendler, Eva Hemmer
Summary: A new strategy has been developed for coencapsulating UCNPs with hydrophobic photosensitizers using phytoglycogen, creating multifunctional luminescent beads with excellent cytocompatibility and multicolor hyperspectral imaging capability. This platform shows great potential for biomedical applications, allowing for luminescent tagging and simultaneous detection of different moieties under NIR excitation.
Article
Biochemical Research Methods
Chiara Zanetti, Rafael Di Lazaro Gaspar, Alexander V. Zhdanov, Nuala M. Maguire, Susan A. Joyce, Stuart G. Collins, Anita R. Maguire, Dmitri B. Papkovsky
Summary: This study describes a new family of heterosubstituted phosphorescent bioprobes based on the Pt(II)-tetrakis(pentafluorophenyl)porphyrin (PtPFPP) dye. The probes are produced by simple click modification and show good cell-penetrating ability and high reaction yields. Spectral characterization and cell-penetrating ability were evaluated using fluorescence reader and PLIM imaging detection. No significant cytotoxicity was observed for all of the probes under the experimental conditions used.
BIOCONJUGATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Orlando C. Stewart, Alexander C. Marwitz, Joel Swanson, Jeffery A. Bertke, Tyler Hartman, Jorge H. S. K. Monteiro, Ana de Bettencourt-Dias, Karah E. Knope, Sarah L. Stoll
Summary: The luminescence properties of two divalent europium complexes and one trivalent europium complex were investigated, revealing temperature-dependent emission behaviors. Additionally, a series of trivalent lanthanide complexes were synthesized and characterized, demonstrating room temperature luminescence.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Analytical
Rajannya Sen, Liang Li, Alexander V. Zhdanov, Rafael D. L. Gaspar, Dmitri B. Papkovsky
Summary: This study evaluated four different detection platforms for phosphorescence lifetime (PLT) measurements. The results showed that the Victor 2 fluorescence reader produced stable but inaccurate readings at low PLT values, while the Cary Eclipse luminescence spectrometer was able to partly correct this issue. The Tpx3Cam camera-based macroscope and the confocal laser-scanning FLIM/PLIM microscope provided more accurate and informative PLT data.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Soham Mukherjee, Sarmad Naim Katea, Emille M. Rodrigues, Carlo. U. Segre, Eva Hemmer, Peter Broqvist, Hakan Rensmo, Gunnar Westin
Summary: Nanocrystalline ZnO sponges doped with EuO1.5 were successfully prepared by heating metal-salt complex based precursor pastes. Phase separation between ZnO and c-Eu2O3 was observed at temperatures above 700 degrees C. The clean oxide made at 600 degrees C showed a slight volume increase compared to undoped ZnO, and the Eu-doping had little effect on the local structure of ZnO.
Article
Chemistry, Inorganic & Nuclear
Deborah A. Lima, Airton G. Bispo Jr, Diogo A. . Galico, Sergio F. N. Coelho, Joao H. Araujo Neto, Javier A. Ellena, Lanousse Petiote, Italo O. Mazali, Fernando A. . Sigoli
Summary: A new ratiometric luminescent temperature probe has been developed by investigating TbIII and EuIII systems in luminescent coordination polymers. The maximum relative thermal sensitivity of the probe can be tuned by changing the ion-ion separation, chain conformation, and excitation channel.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Claudia M. S. Calado, Isis F. Manali, Isabela M. S. Diogenis, Sergio F. N. Coelho, Veronica C. Texeira, Bruno R. de Mesquita, Joeslei L. Oliveira, Fernando A. Sigoli, Marcos V. dos S. Rezende
Summary: Optical spectroscopy and defect disorder of Eu-doped NaYF4 and NaY(1-x)GdxF(4) structures were studied through computational and experimental methods. Atomistic modeling was used to predict intrinsic disorder and Eu doping sites, and calculate crystal field parameters. The experimental emission spectrum of Eu-doped structures was obtained, showing agreement with theoretical predictions of local symmetry.
Article
Nanoscience & Nanotechnology
Gesiane P. Sousa, Anerise de Barros, Flavio M. Shimizu, Fernando A. Sigoli, Italo O. Mazali
Summary: In this work, highly crystalline beta-NaYF4:Yb3+,Er3+@NaYF4:Nd3+@NaYF4 UCNPs capped with an amino-modified nanosized silica shell were coupled with Au nanospheres. The plasmonic-driven dimerization of 4-ATP to DMAB was carried out solely by using the UCNP visible emissions to excite the Au nanoparticle localized surface plasmon resonance band. The reaction was monitored in situ through SERS, and IDMAP method was applied to analyze the SERS spectra acquired during the plasmonic photocatalytic measurements.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rodney A. Tigaa, Stephen Kuehn, Jorge H. S. K. Monteiro, Novruz G. Akhmedov, Changle Jiang, Faith E. Kidd, Joseph D. Barton, Ciersten S. Rose, Katherine Y. Franklin, Sheridan F. Herron, Franki N. Hatfield, Kaleigh G. Baisden, Abagale K. Ramsay, Samuel K. Appiah
Summary: The chemistry of 4d and 4f metals was studied at the undergraduate level by synthesizing coordination compounds and embedding them in polystyrene beads. The interaction between the phen ligand and Ru2+ was found to be strong due to the diffuse nature of the 4d orbitals. In contrast, the interaction between the phen ligand and Eu3+ was weak. The weak interaction allowed for color tuning and the generation of cool white light.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Chemistry, Inorganic & Nuclear
Airton G. Bispo-Jr, Diogo A. Galico, Roberto M. Diaz-Rodriguez, Jeffrey S. Ovens, Fernando A. Sigoli, Muralee Murugesu
Summary: By studying two dinuclear Nd-III complexes, the influence of terminal ligands on magnetic and luminescence performance was revealed. One of the Nd-III complexes exhibited lower thermal sensitivity and weaker equatorial crystal field component.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Amanda Justino de Morais, Airton Germano Bispo-Jr, Flavia de Sousa Ferreira, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: This study investigates the influence of doping concentration, excitation pump power density, and lanthanide-lanthanide separation on the luminescence performance of lanthanide-doped beta-NaGdF4 nanoparticles. The results help to design nanoparticles with versatile emission properties for anti-counterfeiting and energy conversion applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Daniel Carneiro Freitas, Italo Odone Mazali, Fernando Aparecido Sigoli, Danielle da Silva Francischini, Marco Aurelio Zezzi Arruda
Summary: This study presents a rapid and environmentally friendly synthesis method for thermodynamically stable silica nanoparticles (SiO2-NPs) using microwave irradiation (MW) compared to conductive heating. The synthesis method is 30 times faster, uses 4 times less reagents, and is approximately 18 times cheaper than conventional synthesis. The synthesized SiO2-NPs were characterized and found to be stable, monodisperse, and amorphous. After adding SiO2-NPs to the soil used for cultivating soybeans, the homeostasis of Cu, Ni, and Zn in soy leaves was evaluated, and the nanoparticles were found to have an impact on the elemental distribution.
Article
Biochemistry & Molecular Biology
Diogo Alves Galico, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: In this study, a polydimethylsiloxane membrane with two emitter groups attached to the structure was synthesized. The membrane can function as a bifunctional temperature and oxygen ratiometric optical probe, analyzing the effects of temperature changes and oxygen levels on the ratio of emission components.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Airton Germano Bispo-Jr, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: Luminescence thermometry based on Ln(III) systems using the self-calibrated two-band intensity ratiometric method has been studied. Chemically bound [Ln(X-bza)(3)(pdppo)(2)]-PDMS membranes were prepared and used as luminescent temperature probes. The systems showed a thermally dependent excitation channels and achieved ratiometric single-centered Ln(III)-based luminescent temperature probes within a temperature range of 50-320 K.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Airton G. Bispo-Jr, Italo O. Mazali, Fernando A. Sigoli
Summary: The sensitization of Ln complexes through spin-forbidden S-0 -> T transitions has been found to enhance their luminescence, potentially offering opportunities for energy conversion applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)