Article
Chemistry, Multidisciplinary
Zully Matamoros-Veloza, Juan Carlos Rendon-Angeles, Kazumichi Yanagisawa, Tadaharu Ueda, Kongjun Zhu, Benjamin Moreno-Perez
Summary: Microwave-assisted hydrothermal synthesis of partially substituted silicon hydroxyapatite nanopowders was investigated. The experiments showed silicon incorporation into the hydroxyapatite lattice by replacing phosphate groups with silicate groups. Excess silicon content led to reduced particle growth and self-assembly of fine rod-shaped particles into agglomerates.
Article
Polymer Science
Luminita Predoana, Gabriela Petcu, Silviu Preda, Jeanina Pandele-Cusu, Simona Viorica Petrescu, Adriana Baran, Nicoleta G. Apostol, Ruxandra M. Costescu, Vasile-Adrian Surdu, Bogdan Stefan Vasile, Adelina C. Ianculescu
Summary: Using the microwave-assisted sol-gel method, Zn- and Cu-doped TiO2 nanoparticles with an anatase crystalline structure were prepared. The presence of single-phase anatase and dopants in the nanoparticles was confirmed by XRD and XRF analysis. XPS analysis verified the presence of Ti, O, Zn, and Cu on the surface of the nanoparticles. Cu doping was found to enhance the photocatalytic activity of TiO2 in the visible-light range by narrowing the band-gap energy.
Article
Chemistry, Inorganic & Nuclear
Maria O. Enikeeva, Olga V. Proskurina, Aleksandr A. Levin, Alexandr V. Smirnov, Vladimir N. Nevedomskiy, Victor V. Gusarov
Summary: Nanopowders with a rhabdophane structure were synthesized by hydrothermal-microwave method. Various characterization techniques were used to study the nanopowders, revealing the formation of rod-like single-crystal nanoparticles with isolated pores inside. A mechanism of coherent-accommodative intergrowth of nanoscale clusters with rhabdophane structure was proposed to explain the formation of these nanoparticles.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Patrick E. J. Saloga, Tina Rybak, Andreas F. Thuenemann
Summary: In this study, a simple one-pot procedure was reported to obtain aqueous zinc oxide (ZnO) nanoparticle dispersions from ZnO nanoparticles dispersed in cyclohexane. Polysorbate 80 (Tween 80) was used as a phase transfer agent and colloidal stabilizer. The particle sizes could be controlled by adjusting the incubation time of the dispersion.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
So-Young Shin, Han-Sol Yun, Su-Yeon Kim, Jae-Hyun Shim, Kwon-Jin Park, Chun-Yeol You, Nam-Hee Cho
Summary: The study shows that the synthesis of ZnFe2O4 can be achieved at a lower temperature using microwave-assisted heating, and redistribution of Zn and Fe ions occurs during the synthesis process. This phenomenon plays a key role in the magnetic transformation of ZFO.
SCIENCE OF ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
R. Mnatsakanyan, D. Davtyan, T. Minasyan, S. Aydinyan, I Hussainova
Summary: The research successfully developed a high density B4C-ReB2 composite material using microwave synthesis and spark plasma sintering, making it a superhard material due to its high hardness. The fractured surfaces demonstrate the complete denseness of the composite material.
Article
Materials Science, Ceramics
S. Gopinath, M. Mayakannan, S. Vetrivel
Summary: This study presents the synthesis of silver doped cobalt oxide nanoparticles using a microwave-assisted method, and investigates their structural, optical, and antibacterial activities. The results show that the doping concentrations affect the crystallite size, with the highest activity observed at 20% silver doping.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Wei Zhang, Haiming Wang, Yuchuan Ma, Changfu You
Summary: The sulfur fixation technology using microwave irradiation and ultrafine Ca(OH)(2) slurry can effectively reduce sulfur emissions from raw coal during combustion. The method has a synergistic effect and higher fixation rate on finer coal particles. Adding NaOH can further improve the fixation rate, while increasing NaOH or reducing Ca(OH)(2) decreases the rate. The practical application of this method shows promising results.
Article
Materials Science, Ceramics
Suman Sharma, Mukesh Kumar Verma, Narayan Dutt Sharma, Nisha Choudhary, Sumit Singh, Devinder Singh
Summary: Rare earth doping affects the structural and magnetic properties of Ni-Co ferrite materials. The saturation magnetization of rare-earth doped ferrites is strongly dependent on the magnetic moment of the rare earth ion, while coercivity increases with the atomic number of the rare earth ion.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
Linan Ma, Shiling Li, Hailong Wang, Shengqiang Zhou, Tan Yang
Summary: This study demonstrates the successful integration of monolayer graphene with Nd:YAG waveguides through ion irradiation, resulting in high-performance passively Q-switched pulsed lasers. The narrowest pulse width achieved is 43.6 ns in the ion-irradiated Y-branch hybrid waveguide. This research paves the way for on-chip laser sources based on hybrid waveguides using ion irradiation.
Article
Materials Science, Ceramics
Kian Wei Goh, Yew Hoong Wong, S. Ramesh, Hari Chandran, S. Krishnasamy, S. Ramesh, Amritpal Sidhu, W. D. Teng
Summary: In this study, eggshell-derived hydroxyapatite (HA) powder was successfully synthesized using a simple wet chemical method assisted by microwave irradiation. Different pH values were investigated to reveal their impact on the properties of HA particles. The study demonstrated that pH plays a crucial role in altering the morphology and size of HA particles.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Zekun Yin, Jian Wu, Liwen Liang, Chuncai Kong, A. Pervikov, Huantong Shi, Xingwen Li
Summary: This study fabricates FeCoNi magnetic nanoparticles through joint electrical explosion of wires for electromagnetic wave absorption applications. Increasing the energy storage capacity of the capacitors can enhance the maximum reflection loss and shift the corresponding frequency towards lower frequencies, without affecting the maximum bandwidth significantly. The minimum reflection loss of the magnetic nanoparticles reaches -50.2 dB at 6.8 GHz for a thickness of 2.5 mm, while the maximum effective absorption bandwidth reaches 8.1 GHz for a thickness of 1.5 mm. The wire explosion method offers a cost-effective, environmentally friendly, and high-output approach for industrial batch preparation of microwave-absorbing materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
M. Mayakkannan, A. Murugan, A. Shameem, V Siva, S. Sasikumar, S. Thangarasu, S. Asath Bahadur
Summary: Ternary transition metal ferrite (NiCoFe2O4) was successfully synthesized using a microwave-assisted method as an electrode material for supercapacitor applications. Structural analysis confirmed the material's cubic spinel structure, and the prepared nanomaterial exhibited excellent electrochemical performance with high specific capacitance and retention rate.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Engineering, Chemical
Mohammad Ebadi, Majid Asri, Farshad Beshkar
Summary: In this study, a visible-light-driven Mo/Bi2MoO6/Bi3ClO4 heterojunction photocatalyst was fabricated via the Pechini sol-gel process, exhibiting excellent photocatalytic desulfurization performance of thiophene. The photocatalytic desulfurization mechanism was elucidated with the identification of key radicals involved in the process.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Mukesh Kumar Verma, Devinder Singh
Summary: The study focused on the impact of Li substitution in the La0.65Ca0.35-xLixMnO3 system on structural, magnetic, and transport properties. It was found that the phases exhibit transitions from paramagnetic to ferromagnetic state and from semiconductor to metal, with slight discrepancy between experimental and theoretical magnetic moments possibly due to magnetic inhomogeneity. Resistivity data suggested conduction in the phases is dominated by the adiabatic small polaron hopping (ASPH) model.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Archaeology
Veronica Ciaramitaro, Francesco Armetta, Monica de Cesare, Maria Luisa Saladino
Summary: The analysis and identification of color traces found in architectural elements and artifacts from the Archeological Park of Segesta (Trapani, Italy) were conducted using various non-invasive techniques. The study identified several pigments, including hematite, umber, vegetable black, and bone black. Despite the limited amount of detectable pigment, the investigation provided insight into the ancient civilizations and allowed for a glimpse into the past.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Materials Science, Multidisciplinary
Francesco Armetta, Vitalii Boiko, Dariusz Hreniak, Rosina C. Ponterio, Maria Luisa Saladino
Summary: A method was developed to prepare luminescent inks of YPO4:Eu dispersions with PVA. YPO4:Eu nanoparticles were prepared by precipitation and hydrothermal treatment. The process included systematic studies on preparing stable colloidal system, investigating the parameters affecting its stability and UV-excited YPO4:Eu emission intensity. The interaction responsible for the dispersion stability was also investigated.
Article
Chemistry, Multidisciplinary
Francesco Armetta, Maria Luisa Saladino, Maria Clara Martinelli, Rosario Vilardo, Gianfranco Anastasio, Sebastiano Trusso, Viviana Mollica Nardo, Dario Giuffrida, Rosina Celeste Ponterio
Summary: This study combines portable X-ray fluorescence spectroscopy with multivariate analysis to investigate glass supports in the archaeological park of the Aeolian Islands. The analysis of normalized peak areas provides a reliable grouping based on elemental compositions, offering a guideline for chemometrics in XRF data analysis.
Article
Mathematics, Applied
G. Landia, G. V. Spinelli, F. Zama, D. Chillura Martino, P. Conte, P. Lo Meo, V. Bortolotti
Summary: Fast Field-Cycling Nuclear Magnetic Resonance relaxometry is a non-destructive technique used to investigate molecular dynamics and structure in various applications. This paper models the parameter identification problem as a constrained L1-regularized non-linear least squares problem and proposes an algorithm to compute the regularization parameter and model parameters. The convergence properties of the algorithm are analyzed, and extensive testing on synthetic and real data is conducted.
APPLIED MATHEMATICS AND COMPUTATION
(2023)
Article
Agriculture, Multidisciplinary
Paola Bambina, Alberto Spinella, Giuseppe Lo Papa, Delia Francesca Chillura Martino, Paolo Lo Meo, Onofrio Corona, Luciano Cinquanta, Pellegrino Conte
Summary: The soil effect on the micro-component composition of Nero d'Avola wines obtained from different locations was investigated using 1H NMR-based metabolomics. The study found that the differences among wines were not only due to the concentrations of various analytes but also to the characteristics of the H-bond network. Furthermore, the H-bond network was found to be related to the soil properties.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Francesco Armetta, Dario Giuffrida, Maria Clara Martinelli, Viviana Mollica Nardo, Maria Luisa Saladino, Rosina Celeste Ponterio
Summary: The goal of this work is to contribute to the study of Neolithic painted pottery through the chemical characterization of samples from the Aeolian Islands. Analysis of 16 different sherds revealed the presence of pigments, including some no longer visible to the naked eye, and provided information about pottery differentiation using FT-IR.
Article
Materials Science, Multidisciplinary
Angela Sciatti, Paola Marzullo, Gabriella Chirco, Elena Piacenza, Federica Arcidiacono, Elena Dellu, Delia F. Chillura Martino
Summary: The analysis of organic and mineral content in biological samples helps determine post-mortem changes and the preservation status of ancient human remains. This study focuses on the physical-chemical characterization of bone specimens from different historical periods found in Apulia, Italy. Specific infrared and X-ray spectroscopies were used to evaluate the extent of diagenetic processes and elemental composition. Physical-chemical post-mortem transformations were influenced by soil composition, tissue specificity, burial rituals, probable dietary customs, and pathologies.
Article
Biochemistry & Molecular Biology
Francesco Armetta, Rosina Celeste Ponterio, Ivana Pibiri, Maria Luisa Saladino
Summary: This paper reports on the investigation of metal finds from the wreck of a Punic ship, using techniques such as portable X-ray fluorescence and Raman spectroscopy to identify their composition. The degradation of these finds in the underwater environment was also explained through the analysis of micro-samples using X-ray diffractometry, polarised optical microscopy, and scanning electron microscopy.
Article
Materials Science, Multidisciplinary
Francesco Armetta, Mattia Gaboardi, Jasper Plaisier, Maria Luisa Saladino
Summary: Yttrium aluminium gallium garnet (YAGG) doped with rare-earth ions has been synthesized via the urea glass route followed by thermal treatment. The formation of the garnet was studied in situ using synchrotron powder diffraction. The results show that the onset of formation of the garnet is about 860 degrees C, with comparable cell parameters for both undoped and doped YAGG. A possible growth mechanism of YAGG is discussed based on observed microstructural parameters.
Article
Chemistry, Multidisciplinary
Francesco Armetta, Dario Giuffrida, Rosina C. Ponterio, Maria Fernanda Falcon Martinez, Francesca Briani, Elena Pecchioni, Alba Patrizia Santo, Veronica C. Ciaramitaro, Maria Luisa Saladino
Summary: This paper presents the findings of an investigation into six microsamples taken from the vault of San Panfilo Church in Tornimparte (AQ). The study aimed to identify the composition of the pigments and protective/varnishes, analyze the executive technique, evaluate the conservation state, and gather evidence of past restoration works. The samples were analyzed using optical microscopy, scanning electron microscopy with energy-dispersive spectroscopy (EDS), X-ray fluorescence (XRF), and infrared and Raman spectroscopy. This investigation was carried out as part of the Tornimparte project Archeometric investigation of the pictorial cycle of Saturnino Gatti in Tornimparte (AQ, Italy), sponsored by the Italian Association of Archeometry (AIAr) in 2021.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Antonella Di Vincenzo, Delia Chillura Martino, Elena Piacenza, Pellegrino Conte, Alberto Pettignano, Giuseppe Lazzara, Paolo Lo Meo
Summary: Significant activity improvement was achieved by associating graphene oxide-silver composite photocatalysts with cyclodextrin-based nanosponge materials, due to the synergistic effect provided by the supramolecular host abilities of the nanosponge. The nanosponge-based materials showed enhanced performances in the oxidative photodegradation of organic pollutants and good recyclability. The local concentration effect provided by the nanosponge is attributed to the activity improvement.
APPLIED SURFACE SCIENCE ADVANCES
(2023)
Article
Materials Science, Ceramics
Francesco Armetta, Vitalii Boiko, Dariusz Hreniak, Cecilia Mortalo, Cristina Leonelli, Ludovico Barbata, Maria Luisa Saladino
Summary: This study reports a method for controlling the desired shape and microstructure of YPO4:Eu3+ nanoparticles using the precipitation method followed by hydrothermal treatment. The method allows for highly controlled formation of YPO4:Eu3+ by selecting appropriate synthesis parameters. The shape and size of the nano-needle-shaped particles can be independently controlled in both directions through autoclave processing time, as confirmed by various analytical techniques.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Maduka L. Weththimuni, Giacomo Fiocco, Chiara Milanese, Alberto Spinella, Maria Luisa Saladino, Marco Malagodi, Maurizio Licchelli
Summary: The aim of this research is to investigate the improvement of varnish resistance to different aging processes for classical violins. The traditional varnish was recreated in the laboratory and functionalized with a cross-linking agent. The functionalized varnish exhibited enhanced resistance to aging, particularly in terms of photostability and hardness.
Article
Materials Science, Multidisciplinary
Aleksandra Gerus, Vitalii Boiko, Veronica Concetta Ciaramitaro, Maria Luisa Saladino, Dariusz Hreniak
Summary: This paper reports on the control of high brightness persistent luminescence of the smallest ZGO:Cr nanoparticles by optimizing hydrothermal synthesis parameters. The influence of pH solution, synthesis temperature, and calcination on structure and optical properties was systematically investigated. The results show that different synthesis conditions modify the trap depths distribution, affecting the duration and intensity of persistent luminescence.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Biochemistry & Molecular Biology
Veronica Ciaramitaro, Elena Piacenza, Paolo Lo Meo, Calogero Librici, Martina M. Calvino, Pellegrino Conte, Giuseppe Lazzara, Delia F. Chillura Martino
Summary: The researchers modified starch films by adding citric acid and polyethylene glycol 200, which improved their properties and inhibited starch chains' retrogradation and recrystallization. By observing the mobility of the polymer chains through ss-NMR, the study revealed a different polymer chain structural organization, which explained the film's higher resistance to thermal degradation and greater elongation at the break.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
