Article
Chemistry, Physical
Ghulam Ali, Anam Javaid Kiani, Faiza Jan Iftikhar, Syed Ali Abbas Kazmi, Muhammad Akbar, Ali Rauf, Kyung Yoon Chung
Summary: The electrochemical properties and reaction mechanism of the stable structured Na2MoO4 anode material in sodium-ion batteries were investigated. The Na2MoO4/C nanocomposite exhibited high cycling stability with a capacity retention of >96%. The reversible effect of Mo-O tetrahedral coordination by the sodium insertion/extraction process was evaluated using synchrotron-based in situ XRD and X-ray absorption spectroscopy.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Physics, Applied
Sahadeb Ghosh, Mangla Nand, Rajiv Kamparath, Mukul Gupta, D. M. Phase, S. N. Jha, S. D. Singh, Tapas Ganguli
Summary: In this study, oriented thin films of beta-(Ga1-x Fe(x))(2)O-3 were successfully deposited using radio frequency magnetron sputtering on different substrates. The influence of substituted Fe ions on the electronic structure of β-Ga2O3 films was investigated using resonant photoelectron spectroscopy. It was found that Fe substitution altered the band structure of β-Ga2O3, transforming it from a band-like system to a charge-transfer system.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Minsi Li, Weihan Li, Yongfeng Hu, Andrey A. Yakovenko, Yang Ren, Jing Luo, William M. Holden, Mohsen Shakouri, Qunfeng Xiao, Xuejie Gao, Feipeng Zhao, Jianwen Liang, Renfei Feng, Ruying Li, Gerald T. Seidler, Frank Brandys, Ranjith Divigalpitiya, Tsun-Kong Sham, Xueliang Sun
Summary: The study presents a high-performance nanostructured BP/G/CNTs composite synthesized using ball-milling method, which shows a high initial capacity of 1375 mA h g(-1) at 0.15 A g(-1) and maintains 1031.7 mA h g(-1) after 450 cycles. Moreover, the electrochemical mechanism of BP anodes with three-step lithiation and delithiation is experimentally revealed for the first time, along with evidence of an open-circuit relaxation effect of the electrode.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Ceramics
Muhammad Junaid, Ijaz Ahmad Qazafi, Muhammad Azhar Khan, Shagufta Gulbadan, Syed Zafar Ilyas, H. H. Somaily, Mohamed S. Attia, Mohammed A. Amin, H. M. Noor ul Huda Khan Asghar
Summary: The impact of Ni2+ and Zr4+ on the physical properties of LiFe2O4 ferrites synthesized via the microemulsion technique was investigated. The substitution of Ni2+ and Zr4+ ions led to changes in lattice constant, crystallite size, X-ray density, dielectric parameters, and magnetic properties of lithium ferrites.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Weifeng Huang, Jianxin Kang, Tingwen Chen, Dawei Pang, Lihua Wang, Hang Wei, Changchun Yang, Dongfeng Zhang, Lin Guo
Summary: Nickel based magnetic nanocrystals have wide applications in magnetic and catalytic fields. Tunable magnetic properties of nickel can be achieved through non-magnetic doping or phase transformation. This study presents a way to control the magnetism of Au@Ni-carbide magnetic materials by adjusting the amount of carbon in the Ni layer, and provides solid evidence for the carbonation process from fcc-Ni to Ni X C instead of phase transformation to hcp-Ni. Further investigation reveals that the magnetism of the hybrids is mainly contributed from the residual fcc-Ni.
Review
Chemistry, Physical
Francisco Zaera
Summary: Catalysis in industrial chemical processes has long been studied through various spectroscopic techniques like vibrational and X-ray spectroscopies, allowing for a molecular-level understanding of catalytic mechanisms. These techniques help researchers explore the intricate details of catalytic processes and advancements in the field.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Yogesh Kumar, S. Tripathi, Mangla Nand, R. Jangir, V. Srihari, A. Das, R. Singh, U. Deshpande, S. N. Jha, A. Arya
Summary: This study investigated the effect of Nd doping on the structural, optical, and electronic properties of lanthanum monazite structure. Pure and Nd-doped LaPO4 powders were prepared and analyzed for their composition, oxidation states, crystal structure, and bandgaps. The results confirmed the successful substitution of Nd in the LaPO4 matrix and provided insights into the local structure using extended X-ray absorption fine structure analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Physical
George E. Cutsail, Serena DeBeer
Summary: X-ray spectroscopy plays a significant role in catalysis research by providing essential electronic and geometric structural information. The development of dedicated synchrotron-based X-ray emission spectrometers has expanded experimental capabilities, offering more detailed data. There is a continuous demand for conventional XAS applications and the integration with more advanced techniques.
Article
Chemistry, Physical
Mauricio Lopez Luna, Janis Timoshenko, David Kordus, Clara Rettenmaier, See Wee Chee, Adam S. Hoffman, Simon R. Bare, Shamil Shaikhutdinov, Beatriz Roldan Cuenya
Summary: The study investigates the structural and chemical evolution of oxide-supported iron nanoparticles during the activation stages and the CO2 hydrogenation reaction, revealing the preferential formation of iron surface oxides under reaction conditions. The results highlight the important role played by the oxide support in the final structure and composition of nanosized catalysts.
Article
Physics, Multidisciplinary
N. Jourdain, L. Lecherbourg, V Recoules, P. Renaudin, F. Dorchies
Summary: The ultrafast dynamics of the loss of crystalline periodicity in femtosecond laser heated warm dense copper was studied using x-ray absorption near-edge structures above the L3 edge. A characteristic time of approximately 1 ps was observed for energy densities ranging from 1 to 5 MJ/kg, with the experimental data well reproduced by two-temperature hydrodynamic simulations, indicating a thermal phase transition.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Deok-Yong Cho, Ki-jeong Kim, Kug-Seung Lee, Michael Lubben, Shaochuan Chen, Ilia Valov
Summary: Thin layers inserted between a metal electrode and a solid electrolyte can modify the transport of mass and charge at interfaces and affect electrode reactions. Incorporating C films in functional materials can alter the host's chemical properties and device functionalities. Using X-ray spectroscopies, it was found that inserting graphene or ultrathin amorphous C layers in a Ta2O5/Ta system can tune its chemical and electronic structures, thereby fundamentally changing the resistive switching functionalities.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Cafer Tufan Cakir, Tobias Piotrowiak, Uwe Reinholz, Alfred Ludwig, Franziska Emmerling, Christina Streli, Ana Guilherme Buzanich, Martin Radtke
Summary: In this study, the use of nondestructive, depth-resolved, element-specific characterization using grazing exit X-ray absorption near-edge structure spectroscopy (GE-XANES) is proposed to investigate the corrosion process in compositionally complex alloys (CCAs). The setup allows for scanning-free, nondestructive, depth-resolved analysis in a sub-micrometer depth range for layered materials. The findings demonstrate the potential of this approach for studying surface catalysis and corrosion processes in real-world materials.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Ian Byrnes, Lisa Magdalena Rossbach, Jakub Jaroszewicz, Daniel Grolimund, Dario Ferreira Sanchez, Miguel A. Gomez-Gonzalez, Gert Nuyts, Estela Reinoso-Maset, Koen Janssens, Brit Salbu, Dag Anders Brede, Ole Christian Lind
Summary: Micro- and nanoscopic X-ray techniques were used to investigate the relationship between uranium tissue distributions and adverse effects on the digestive tract of Daphnia magna. The study showed that exposure to uranium nanoparticles (UNPs) resulted in adverse morphological changes to the midgut and hepatic ceca, as well as abnormal intestinal epithelial cells. High-resolution nano-XRF identified U particulates throughout the midgut and within hepatic ceca cells, coinciding with tissue damages. These findings highlight the importance of disrupted intestinal function as a mode of acute U toxicity in D. magna.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Biochemistry & Molecular Biology
Valentina Bonanni, Alessandra Gianoncelli
Summary: Scanning transmission X-ray microscopy (STXM) allows imaging of biological specimens and collection of localized spectroscopic information through X-ray fluorescence (XRF) and/or X-ray Absorption Near Edge Spectroscopy (XANES). Recent publications in synchrotrons have utilized soft X-ray spectro-microscopy in life science and environmental research to explore complex metabolic mechanisms by tracing chemical elements involved in metabolic pathways.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Ziyi Chen, Andrew G. Walsh, Xiao Wei, Manzhou Zhu, Peng Zhang
Summary: This study investigates the electronic properties of Ag-25(SR)(18) and Au-25(SR)(18) and develops a unique method to analyze the charge transfer behavior of nanoclusters. Experimental X-ray spectroscopy is used to demonstrate the bonding properties of silver nanoclusters, with the staple motif shown to have a significant impact on their electronic properties. The effective X-ray analysis techniques developed here provide new opportunities for the site-specific study of other nanoclusters.
Article
Engineering, Chemical
Amarjit Singh, Harish Singh Dhami, Manoj Kumar Sinha, Ravi Kumar
Summary: This article presents a detailed study of the mineralogy, micromeritics, and rheology of various materials, including powders and metal chips. The density and morphology of the particles were found to greatly influence their properties. The study also suggests that waste metallic chips can be recycled through powder metallurgy, saving time compared to ball milling.
Article
Engineering, Electrical & Electronic
Kapil Dev Singh, Dinesh Kumar Shukla, Ravi Kumar
Summary: By utilizing x-ray absorption near-edge spectroscopy (XANES) measurements, we investigated the electronic structure of perovskite-type RCrO3 (R = La, Nd, Eu, Gd, Dy, and Y) compounds. The results showed significant differences in the framework of the metal-oxygen hybridization caused by different rare earth elements (R). The dominant role of Cr3+ was found in all these perovskite-type RCrO3 samples, except for EuCrO3 where Cr existed in a mixed-valence state of +3 and +4. The ligand field-splitting values increased consistently with decreasing rare-earth (R) cationic radii, except for an anomaly in the case of Eu.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Brunna Mota Ferrairo, Victor Mosquim, Lucas Jose de Azevedo-Silva, Luara Aline Pires, David Santos Souza Padovini, Aroldo Geraldo Magdalena, Carlos Alberto Fortulan, Paulo Noronha Lisboa-Filho, Jose Henrique Rubo, Ana Flavia Sanches Borges
Summary: This study evaluated the effectiveness of sonochemical and milling nanoparticulate techniques on bovine-origin hydroxyapatite (HA). The results showed that both methods were able to decrease the particle size and maintain the crystal structure of HA. The milling method produced smaller particles compared to sonochemical treatment.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Adriana Alencar Santos, Jean Valdir Uchoa Teixeira, Carlos Alberto Fonzar Pintao, Diego Rafael Nespeque Correa, Carlos Roberto Grandini, Paulo Noronha Lisboa-Filho
Summary: Developing novel titanium alloys suitable for long-term use in orthopedic and dental prostheses is crucial for clinical needs to prevent adverse implications and costly procedures. This study investigated the corrosion and tribocorrosion behavior of two recently developed titanium alloys, Ti-15Zr and Ti-15Zr-5Mo, and compared them with CP-Ti G4. The results showed that Ti-15Zr and Ti-15Zr-5Mo exhibited advantageous properties in the electrochemical and tribocorrosion tests compared to CP-Ti G4, indicating the potential for biomedical applications.
Article
Materials Science, Multidisciplinary
Adriana Santos, Jean Teixeira, Carlos Fonzar, Elidiane Rangel, Nilson Cruz, Paulo Noronha Lisboa-Filho
Summary: This article investigates a new approach to improve the electrochemical and tribological performance of titanium and its alloys in biomedical applications. A protective layer composed of titanium oxide (TiO2) and calcium phosphate (CaP) was deposited on the surface, effectively reducing corrosion degradation and mechanical wear in a physiological environment.
Article
Materials Science, Ceramics
Celso Antonio Goulart, Mariana Miranda de Toledo Piza, Tiago Moreira Bastos Campos, Estevam Augusto Bonfante, Paulo Noronha Filho Lisboa
Summary: Dense and homogeneous nanostructured Y-TZP ceramics were prepared using colloidal processing and 2-step sintering. The influence of non-homogeneous yttria distributions on mechanical properties and Low-Temperature Degradation (LTD) resistance were evaluated. Nanostructured samples with non-homogeneous yttria distributions exhibited the highest fracture toughness and elevated fracture strength, but were susceptible to LTD with restricted monoclinic phase fraction near the surface. Careful design and engineering of nanostructures may lead to Y-TZP ceramics with improved mechanical properties and LTD resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Jean Valdir Uchoa Teixeir, Gabriel Junior Cavalcante Pimentel, Adriana Alencar Santos, Leonardo Francisco Goncalves Dias, Valmor Roberto Mastelaro, Paulo Noronha Lisboa-Filho
Summary: This study introduces a sono-assisted route to synthesize partially reduced graphene oxide (RGO) particles using glucose as a mild reducing agent in alkali media, without the use of hazardous chemicals. The results reveal that the choice of base during the sono-assisted reduction method plays a direct role in determining the final properties of RGO, including thermal stability, bandgap, impedance, and C/O rate. This study suggests a possible way to control the particle surface properties through the selection of different bases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Biochemistry & Molecular Biology
Marcela de Oliveira, Felipe Balistieri Santinelli, Paulo Noronha Lisboa-Filho, Fabio Augusto Barbieri
Summary: This study investigated the relationship between blood concentration of metallic nanoparticles and cognitive performance in patients with multiple sclerosis (MS). The findings showed that total blood nanoparticles concentration was related to cognitive performance, and the concentrations of iron and zinc in the blood were associated with different aspects of cognitive performance. These results suggest that blood concentration of metallic nanoparticles, particularly iron concentration, may serve as a promising biomarker for monitoring cognitive impairment in MS patients.
Article
Chemistry, Physical
Leonardo Francisco Goncalves Dias, Milena Yumi Kasama Nakata, Gabriel Junior Cavalcante Pimentel, Erika Soares Bronze-Uhle, Valmor Roberto Mastelaro, Paulo Noronha Lisboa-Filho
Summary: This study explores the adsorption behavior of bisphosphonates (BPs) on TiO2, hydroxyapatite (HA), and TiO2+HA composite surfaces. The impact of UV irradiation on BP adsorption was investigated through adsorption curves, revealing an increase in adsorbed BP content due to enhanced deprotonation and hydroxyl group formation. X-ray photoelectron spectroscopy (XPS) analysis indicates that BPs adsorb through condensation reactions with TiO2, while phosphate and Ca2+ ions coordinate with HA. Functionalized films exhibit a water contact angle of zero, and atomic force microscopy (AFM) measurements suggest that BP adsorption has a smaller impact on titania topography compared to HA.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Biomedical
Gabriel Mulinari-Santos, Jaqueline Silva dos Santos, Igor Lebedenco Kitagawa, Fabio Roberto de Souza Batista, Paulo Roberto Botacin, Cristina Antoniali, Paulo Noronha Lisboa-Filho, Roberta Okamoto
Summary: Hypertension and estrogen deficiency can impair osseointegration, and the use of antihypertensive drugs and alendronate sodium can enhance bone healing. However, estrogen deficiency still affects bone integration even with alendronate coating.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Guilherme Ribeiro Capelin, Milena Yumi Kasama Nakata, Jean Valdir Uchoa Teixeira, Adriana Alencar Santos, Paulo Noronha Lisboa Filho
Summary: Currently, the titanium substrate is a widely used metallic biomaterial in various medical fields. However, its biological inertness and low bactericidal capacity limit its osseointegration ability. This study aims to analyze the corrosion resistance, surface morphology, and crystallinity of titanium oxide and titanium oxide with addition of magnesium coatings on a titanium substrate through electrodeposition.
MATERIA-RIO DE JANEIRO
(2023)
Article
Biochemistry & Molecular Biology
Bruna Kaori Namba Inoue, Laura Vidoto Paludetto, Naara Gabriela Monteiro, Fabio Roberto de Souza Batista, Igor Lebedenco Kitagawa, Roberto Santana da Silva, Cristina Antoniali, Paulo Noronha Lisboa Filho, Roberta Okamoto
Summary: Postmenopausal osteoporosis and poor dietary habits can lead to overweightness and obesity. This study found that nitric oxide has the potential to improve peri-implant conditions, especially at low concentrations.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Medicine, General & Internal
Anderson Maikon de Souza Santos, Rodrigo dos Santos Pereira, Pietro Montemezzi, Rafael Coutinho Mello-Machado, Roberta Okamoto, Roberto Sacco, Paulo Noronha Lisboa-Filho, Michel Reis Messora, Carlos Fernando Mourao, Eduardo Hochuli-Vieira
Summary: The study aimed to assess the efficacy of using Raloxifene with ultrasonic processing to enhance Bio-Oss & REG; for maxillary sinus bone height reconstruction. Results indicated that while sonicated Bio-Oss & REG; performed comparably to Bio-Oss & REG; alone, the addition of Raloxifene led to an unexpected delay in bone repair. These findings stress the importance of histological evaluation for accurate bone repair assessment.
MEDICINA-LITHUANIA
(2023)
Article
Dentistry, Oral Surgery & Medicine
Ana Mara da Silva Morais, Ysadora Mayara Reali Pereira, Isaac Jordao de Souza-Araujo, Daniel Furtado Silva, Vanessa Gallego Arias Pecorari, Orisson Ponce Gomes, Francisco Humberto Nociti-Junior, Regina Maria Puppin-Rontani, Waldemir Francisco Vieira-Junior, Paulo Noronha Lisboa-Filho, Kamila Rosamilia Kantovitz
Summary: This in vitro study investigated the potential impact of titanium dioxide nanotubes (TiO2-nts) on the performance of glass ionomer cement (GIC). The results showed that GIC reinforced with TiO2-nts had similar elemental composition to unblended GIC, but significantly reduced the release rate of aluminum. These findings contribute to our understanding of the effects of TiO2-nts on conventional GICs.
BRAZILIAN ORAL RESEARCH
(2022)
Article
Chemistry, Physical
Paula Buzo Frigerio, Pedro Henrique Silva Gomes-Ferreira, Fabio Roberto De Souza Batista Juliana Moura, Idelmo Rangel Garcia Junior, Daniele Botticelli, Paulo Noronha Lisboa-Filho, Roberta Okamoto
Summary: This study evaluated the behavior of repaired bone in rats after extraction, focusing on the use of PTH (teriparatide) and Biogran (R) (a biomaterial). The results showed that the use of Biogran (R) with PTH improved bone quality in healthy rats, but did not have significant effects in orchiectomized rats. Further research is needed to determine more effective doses for postoperative bone formation.
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)
