Article
Chemistry, Physical
Edgars Butanovs, Alexei Kuzmin, Sergei Piskunov, Krisjanis Smits, Aleksandr Kalinko, Boris Polyakov
Summary: The study demonstrates the growth of high-quality few-layer ReS2 using pre-deposited rhenium oxide coating on different semiconductor material nanowires, creating novel core-shell heterostructures for energy applications involving photocatalytic and electrocatalytic hydrogen evolution.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
N. Sreeram, S. Yusub, A. Ramesh Babu, M. Venkateswarlu, G. Krishna Priya, V. Aruna, Ravindranadh Koutavarapu
Summary: The dielectric, physical, and optical properties of 5GeO2-30Li2O-55P2O5-(10-x)MgO-xCr2O3 (x varies from 0 to 0.9 mol%) glasses were investigated. The non-crystalline behavior of these glasses was analyzed using X-ray diffraction. The compact nature of the glasses was indicated by their physical parameters. The optical absorption spectra showed the presence of Cr3+ ions and the optical band gap and Urbach energy of the glasses were evaluated. Fourier-transform infrared and Raman spectra supported the structural changes in the glasses, while the emission and ESR spectra confirmed the presence of chromium ions.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
D. P. Rojas, J. I. Espeso, L. Rodriguez Fernandez, L. Fernandez Barquin
Summary: The study on nanocrystalline ceramic rare earth oxide Yb2O3 revealed a cubic crystallographic structure and an excess heat contribution at high temperature region. The antiferromagnetic contribution changed at low temperatures due to magnetic disorder arising from the size reduction process. Additionally, in the nanocrystalline state, broadening and shifts of the contribution of phonon modes to the Raman spectra, and a reinforcement of the anharmonic contribution were observed.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Elham Allahverdi, Vishtasb Soleimanian, Mohsen Ghasemi, Ali Mokhtari
Summary: This study investigates the correlation between microstructure and optical properties of low symmetry materials. TiO2 (tetragonal) and NaTaO3 (orthorhombic) nanopowders were synthesized using sol-gel and hydrothermal methods. The microstructure behavior of TiO2 was analyzed based on active slip systems, while the microstructure behavior of NaTaO3, with unknown slip systems, was studied using the Rietveld method. Additionally, UV-Vis and photoluminescence spectra were measured to understand the relation between optical and microstructure peculiarities.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Elisson Andrade Batista, Anielle Christine Almeida Silva, Thais Karine de Lima, Eder Vinicius Guimaraes, Ricardo Souza da Silva, Noelio Oliveira Dantas
Summary: This study focused on investigating the coordination geometry of Mn2+ ions in ZnO nanocrystals and its impact on structural, morphological, optical, and magnetic properties. Various techniques such as XRD, SEM with EDS, UV-Vis-NIR spectroscopy, FL, and EPR were utilized to explore the physical properties. The results provide valuable insights for developing magneto-optic devices and creating materials with tailored properties based on transition metal ion concentrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
P. Sathish, N. Dineshbabu, K. Ravichandran, T. Arun, P. Karuppasamy, M. SenthilPandian, P. Ramasamy
Summary: The structural, optical, surface morphological, and antibacterial properties of undoped and Ga-doped ZnO nanoparticles prepared by a combustion method were explored. Ga doping was found to significantly enhance the antibacterial activity of ZnO nanoparticles.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
S. P. Kandare, B. Joseph, Mala N. Rao, S. S. Dahiwale, S. D. Dhole, Rekha Rao
Summary: Raman spectroscopic and synchrotron powder diffraction measurements were used to study the pressure-induced phase transitions in nano-crystalline Cu2ZnSnS4, revealing a different sequence of transitions compared to bulk Cu2ZnSnS4. The volume data for the ordered kesterite phase was obtained, and the mechanical instability of the disordered kesterite phase leading to a second structural transition was identified.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
D. Budrevicius, N. Kajimoto, A. Pakalniskis, K. Tsuru, A. Kareiva, R. Skaudzius
Summary: Hexagonal gadolinium Phosphate Hydrate doped with different amounts of europium (Gd1-xPO4:Eu-x•H2O; x = 0.01, 0.05, 0.10, 0.15, and 0.20) was synthesized by hydrothermal synthesis method. The optimal dopant concentration was determined through analysis. Additionally, gadolinium was replaced by Lanthanum Gd0.85-yLayPO4:15%Eu (y = 0.25, 0.5, 0.75) to potentially improve luminescence properties due to the monoclinic crystal structure of LaPO4. The crystal structure, morphology, surface area, pore size, and luminescence properties of the synthesized compounds were analyzed.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Chetan B. Palan, Nikhilesh S. Bajaj, Suresh P. Bhagat, Shrinivas K. Omanwar
Summary: In this study, hexagonal structured borate phosphors BaLaB9O16 were synthesized using a combustion method, with color-tunable emission properties achieved by doping Eu3+ and Tb3+. The materials were analyzed for structural and morphological parameters, with photoluminescence results showing good green and red emissions for Tb3+ and Eu3+ doping, respectively, and the co-doped sample exhibiting variable emission from green to red regions by adjusting the excitation wavelength.
Article
Materials Science, Ceramics
Marcin Godzierz, Piotr Olesik, Lukasz Otulakowski, Tomasz Pawlik, Karolina Olszowska, Pawel Chaber, Olha Masiuchok, Hanna Myalska-Glowacka, Jakub Smolen, Bartlomiej Toron, Piotr Szperlich, Urszula Szeluga, Slawomira Pusz
Summary: In this study, a novel, facile, and highly efficient reverse co-precipitation method was used to synthesize nanocrystalline bismuth ferrite (BFO) powder. The proposed method is cost-efficient and environmentally friendly. X-ray diffraction and scanning electron microscopy were used to analyze the crystal structure, phase composition, and morphology of the synthesized powders. The obtained materials showed excellent piezoelectric properties, comparable to those of praseodymium, samarium, or europium doped BiFeO3 ceramic.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Dilip L. Navgare, Vivekanand B. Kawade, Shoyebmohamad F. Shaikh, Santosh S. Jadhav, Umakant B. Tumberphale, Ravindra N. Khule, Rajaram S. Mane, Shyam K. Gore
Summary: The study prepared cobalt-substituted nickel-zinc ferrite aluminate nanoparticles using the sol-gel method, finding that the lattice parameter decreases and crystallite size increases with higher Co2+ substitution, affecting the magnetic properties of the materials.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sukhendu Sadhukhan, Abhik S. Mahapatra, Ayan Mitra, Pabitra K. Chakrabarti
Summary: Nanocrystalline holmium orthoferrite (HoFeO3) was synthesized using the chemical sol-gel technique. Structural investigation and magnetization measurements revealed its multiferroic behavior, establishing its candidacy for multiferroic applications in M-E devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Fariba Kheiri, Vishtasb Soleimanian, Mohsen Ghasemi, Ali Mokhtari
Summary: The electrical and optical parameters of bilayer systems strongly depend on the crystallite properties and lattice defects of each layer. The interactions and processes at the interface of two layers directly affect the physical properties of bilayer films. X-ray diffraction patterns and scanning electron microscope images are used to study the phase fractions, microstructure parameters, and surface morphology of the films as a function of annealing temperature.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
B. L. Choudhary, Namita Kumari, Jyoti Kumari, Arvind Kumar, S. N. Dolia
Summary: This paper discusses the relaxation mechanism at a lower temperature in the Ni0.5Zn0.5Fe2O4 sample prepared using the sol-gel method. The crystal structure and elemental composition were analyzed using XRD and EDAX techniques, revealing a decrease in magnetic domain size with increasing temperature and supporting relaxation at lower temperatures.
Article
Materials Science, Multidisciplinary
Tuan V. Vu, I. V. Luzhnyi, G. L. Myronchuk, V. L. Bekenev, M. S. Bohdanyuk, A. A. Lavrentyev, B. V. Gabrelian, O. V. Parasyuk, O. Y. Khyzhun
Summary: The study reveals that Tl4PbI6 crystal has high quality, low hygroscopicity, high stability, and strong covalency. Using DFT calculations, it is confirmed that Tl4PbI6 is a direct band gap semiconductor with potential application in optoelectronic devices.
Article
Materials Science, Multidisciplinary
Sohail Ahmed, Peter P. P. Murmu, Clastinrusselraj Indirathankam Sathish, Xinwei Guan, Rex Geng, Nina Bao, Rong Liu, John Kennedy, Jun Ding, Mingli Peng, Ajayan Vinu, Jiabao Yi
Summary: Magnetic 2D-layered materials have great potential for spintronic devices and compact magnetic devices. Introducing a magnetic element into 2D-layered materials is an effective strategy to synthesize magnetic materials. By ion implantation, Co and Nd were codoped into MoS2 crystals, achieving extremely high magnetization at both low and room temperatures. This study opens up a useful strategy to develop high-performance magnetic materials based on 2D-layered materials.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Chemistry, Analytical
Anmol Mahendra, Peter P. Murmu, Susant Kumar Acharya, Atif Islam, Holger Fiedler, Prasanth Gupta, Simon Granville, John Kennedy
Summary: In this study, the perpendicular magnetic anisotropy (PMA) of Co2MnGa Heusler alloy film was tuned by argon ion irradiation. The results showed that ion irradiation reduced the effective anisotropy energy and PMA of the film, which is beneficial for magnetic sensor applications.
Article
Materials Science, Multidisciplinary
Abdelaziz Ait Abdelkadir, Jean-Louis Victor, Guillaume Vignaud, Corinne Marcel, Mustapha Sahal, Malik Maaza, Mohamed Chaker, Alain Gibaud
Summary: In this paper, the optical and structural properties of undoped and W-doped V1-xWxO2 vanadium dioxide thin films were investigated. X-ray diffraction analysis showed the transition from monoclinic to rutile phase and a coexistence of phases for tungsten-doped VO2. The study also revealed the decrease of transition temperature from 69.6°C to 41.6°C with increasing tungsten concentration.
Article
Materials Science, Multidisciplinary
P. Gupta, V. Jovic, R. Huebner, E. Anquillare, K. Suschke, K. E. Smith, A. Markwitz, G. I. N. Waterhouse, J. Kennedy
Summary: A one-step approach to synthesize ultrafine metallic cobalt nanoparticles at room temperature by cobalt ion implantation into amorphous carbon films and hydrogenated amorphous carbon films was explored. It was found that hydrogenated carbon films suppressed the aggregation of metallic cobalt nanoparticles, leading to the formation of ultrafine cobalt nanoparticles with a size smaller than 5 nm.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
I. Ngom, N. M. Ndiaye, N. F. Sylla, S. Dieng, B. D. Ngom, M. Maaza
Summary: Three aqueous solutions derived from Moringa oleifera (M.O) flowers, seeds, and leaves were used for the biosynthesis of nickel oxide nanoparticles (NiO-NPs). These nanoparticles were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman spectroscopy, and were found to crystallize in a face centered-cubic single Bunsenite phase. NiO@flowers had the smallest average crystallite size of 18.5 nm, while NiO@seeds had 29.0 nm and NiO@leaves had 21.7 nm. Scanning electron microscopy revealed that NiO@flowers had non-uniform, spherically agglomerated nano-crystals, while NiO@seeds had highly coalescent nanograins and NiO@leaves had irregularly connected microcavities with small nanograins.
Article
Materials Science, Multidisciplinary
Razieh Morad, Mahmood Akbari, Malik Maaza
Summary: This study uses density functional theory calculations to investigate the chemical reactivity descriptors of proposed drugs for COVID-19. The structure optimization and analysis of frontier orbitals reveal the importance of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) in molecular interactions and reactivity. The polarizability is higher in complex drugs such as Hydroxychloroquine, Remdesivir, and Ivermectin, and the calculated energy gap suggests that larger gaps correspond to lower reactivity and higher stability.
Review
Materials Science, Composites
Ayesha Kausar, Ishaq Ahmad, Tingkai Zhao, Malik Maaza, Patrizia Bocchetta
Summary: Fuel cell efficiency can be enhanced by using progressive electrodes and electrolytes, including green nanomaterials and green technologies. The replacement of platinum-based electrodes with green materials and nanocomposites through green fabrication approaches leads to the development of environmentally friendly fuel cells. The application of green nanocomposites in fuel cell electrode and electrolyte materials, along with green synthesis techniques, has demonstrated significant improvements in morphology, impedance, resistance, power density, current density, electrochemical features, proton conductivity, and overall efficiency. The future importance and challenges of utilizing green nanocomposites in electrodes and electrolytes to achieve efficient fuel cells are also discussed.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Haripriya Rama, Busiswa Ndaba, Malik Maaza, Mokhotjwa Simon Dhlamini, Nicolene Cochrane, Ashira Roopnarain
Summary: This study aimed to investigate the effect of different extraction methods on the recovery of phytochemicals and antioxidants from de-kernelled marula seeds. The results showed that the decoction method for 30 minutes produced extracts with the highest content of phenolic compounds, flavonoids, sugars, and organic acids. Fourier-transform infrared spectroscopy confirmed the presence of functional groups typically present in these compounds. The study concluded that the decoction method increased the solubility, variety, and yield of phytochemicals and antioxidants, potentially paving the way for their utilization in the food industry. Rating: 8/10
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Review
Environmental Sciences
Benjamin O. Orimolade, Adewale O. Oladipo, Azeez O. Idris, Feleni Usisipho, Shohreh Azizi, Malik Maaza, Sogolo L. Lebelo, Bhekie B. Mamba
Summary: In recent years, there has been a focus on making water safer and cleaner by eliminating pharmaceutical residues, particularly fluoroquinolone antibiotics, from wastewater. Electrochemical technologies, such as photoelectrocatalysis, electro-Fenton, electrocoagulation, and electrochemical oxidation, have been found to be effective in removing these pharmaceuticals from wastewater. This review discusses the recent progress in the application of these electrochemical processes for the degradation of fluoroquinolone antibiotics, highlighting their fundamentals, results, advantages, limitations, and recommendations for future improvements. It serves as a valuable resource for researchers in the selection of suitable electrochemical techniques for pharmaceutical removal from wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Holger Fiedler, Niall Malone, David R. G. Mitchell, Mitchell Nancarrow, Vedran Jovic, Geoffrey I. N. Waterhouse, John Kennedy, Prasanth Gupta
Summary: Molybdenum carbides are potential low-cost electrocatalysts for electrolyzers, fuel cells, and batteries. This study presents a scalable, physical approach to synthesize molybdenum carbide nanoparticles at room temperature by ion implantation, with the ability to control the phase, stoichiometry, and size of the nanoparticles. The results are explained using the Mo-C phase diagram and Monte-Carlo simulations, and the approach can be applied to synthesize other transition metal carbide nanoparticles.
Article
Spectroscopy
Annah M. Ondieki, Zephania Birech, Kenneth A. Kaduki, Peter W. Mwangi, Nancy M. Mwenze, Moses Juma, Carolyne Jeptoo, M. S. Dlamini, Malik Maaza
Summary: This research introduces surface-enhanced Raman spectroscopy (SERS) substrates based on colloidal silver nanoparticles (AgNPs) produced by laser ablation of silver granules. The optimal parameters were determined by investigating the effects of laser power, pulse repetition frequency, and ablation duration on the Surface Plasmon Resonance peak of AgNPs solutions. The synthesized AgNPs were characterized and found to have potential applications in forensics, drug efficacy monitoring, disease diagnostics, and pathogen detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
N. Matinise, N. Botha, I. G. Madiba, M. Maaza
Summary: This study presents the use of bismuth ferrite nanomaterial (BiFeO3) prepared by a green method using Moringa oleifera natural extract as an anode material for supercapacitor application. The electrochemical properties of the nanomaterial at the modified electrode relative to the unmodified electrode were evaluated using cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge methods. The results showed that the GCE/BiFeO3 electrode exhibited excellent electrochemical performance, making it an ideal electrode material for supercapacitance applications.
Article
Multidisciplinary Sciences
Shohreh Azizi, Maryam Sarkhosh, Ilunga Kamika, Touhami Mokrani, Malik Maaza
Summary: The study examined the cost-effective degradation of trimipramine (TIR) using UV/Sulfite/ZnO (USZ) in both conventional and baffled photocatalytic reactors (BPCR). The optimal conditions for high TRI degradation (97.4%) were a 2:1:100 Sulfite/ZnO/TRI molar ratio, pH 7, and a 30-minute reaction time. In the BPCR reactor, the measured rate constant (k(obs)) and reaction rate (r(obs)) increased by approximately 17% and 50% respectively, as the TRI concentration increased. The intermediate materials formed were analyzed, and most of them were found to be simple linear compounds. The introduction of baffles in the reactor led to decreased electrical energy consumption and total system cost, while the UZS procedure effectively reduced BOD and COD levels.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Multidisciplinary Sciences
N. L. Botha, K. J. Cloete, G. G. Welegergs, M. Akbari, R. Morad, L. Kotsedi, N. Matinise, R. Bucher, S. Azizi, M. Maaza
Summary: This study used molecular dynamics computational modelling to bioengineer a nano-scaled 2-D hydronium jarosite. A phyto-engineering approach using green nano-chemistry and agro-waste in the form of avocado seed natural extract was utilized to synthesize this unique mineral. The nanoproduct exhibited a quasi-2D structure and showed significant electrochemical, electroconductive, and diamagnetic behaviors.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
M. E. M. Eisa, J. A. Mars, S. Naidoo, R. A. Shibrain, K. J. Cloete, M. Maaza
Summary: Trace elements have significant effects on both dental health and human health. This study analyzed the levels of toxic and trace elements in teeth from male and female participants in Sudan. The elemental profile and distribution in tooth enamel were determined using mu-PIXE analysis, and the main elements found were Na, Mg, P, S, Cl, K, Ca, Mn, Fe, Zn, Co, and Sr.
ANALYTICAL SCIENCE AND TECHNOLOGY
(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)
