Article
Materials Science, Ceramics
A. S. Basaleh, Ahmed Shawky, Z. Zaki
Summary: The study demonstrates that perovskite-based photocatalyst modification with simple oxides can achieve visible-light degradation of antibiotic waste in water. CdO plays an important role in promoting photoinduced charge separation and significantly enhancing photocatalytic degradation performance.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Galina M. Kuz'micheva, Liudmila I. Ivleva, Irina A. Kaurova, Evgeny Khramov, Victor B. Rybakov, Maxim E. Doroshenko
Summary: Calcium orthovanadate single crystals doped with manganese were studied, revealing Mn3+ ions and vacancies at different sites; proposed models for the rearrangement of polyhedra; observed different oxidation states of manganese ions through optical spectroscopy.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Engineering, Environmental
Innes Deans, Douglas Stewart, Jenny Jones, Jason Kam, Bhoopesh Mishra
Summary: The study assessed the uptake and distribution of zinc (Zn) and lead (Pb) in a seed-based Miscanthus hybrid grown in contaminated soil. The uptake of Zn and Pb increased in proportion to the soil concentrations by juvenile plants in a pot-trial. The accumulation of Zn and Pb differed between leaf and stem structures, and also between mature biomass and juvenile plants. X-Ray Absorption Fine Structures (XAFS) analysis revealed different Zn speciation in stems and leaves, as well as changes in Zn speciation with plant maturity. The dominant Zn species in juvenile plant leaves were sulfur ligands consistent with the presence of cysteine rich metallothioneins (MT) and phytochelatin (PC) complexes, along with octahedral O/N species typified by Zn-malate. Sulfur ligands were also prevalent in stems from juvenile plants, but the predominant O/N speciation shifted towards tetrahedral coordination. In contrast, tetrahedral Zn coordination with O/N species predominated in the mature biomass crop. The XAFS spectra for the mature biomass indicated that Zn was retained within cell walls as pectin and/or phosphate complexes.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
G. C. Pandey, D. Gangwar, H. Tripathi, G. Aquilanti, Chandana Rath
Summary: The crystal and local structures of NiCr2-xFexO4 spinels synthesized by a co-precipitation method were examined using XRD, XANES, and EXAFS techniques. With increasing x, the occupancy of Ni cations in the A site decreased, leading to an increase in the Curie temperature TC of the paramagnetic to long-range ferrimagnetic transition. The dominance of A-B exchange interaction over B-B exchange interaction, confirmed by changes in bond lengths and angles from structural analysis, contributes to the observed behaviors.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Environmental
Edward D. Burton, Dane T. Lamb, Jessica Hamilton, Graeme Miller, Scott G. Johnston, Niloofar Karimian
Summary: This study investigates the use of modified bauxite refinery residue (MBRR) to reduce the mobility and bioaccessibility of lead (Pb) in contaminated soil. The results show that amendment with MBRR effectively decreased water-soluble and Toxicity Characteristic Leachate Procedure (TCLP) Pb concentrations in the soils. X-ray absorption spectroscopy (XAS) and X-ray diffraction (XRD) analysis confirmed that Pb was retained through sorption and formation of hydrocerussite. Furthermore, the amendment had little effect on gastric-phase Pb bioaccessibility but significantly decreased relative intestinal-phase Pb bioaccessibility due to increased Pb sorption by MBRR's minerals.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Nicole A. DiBlasi, Agost G. Tasi, Xavier Gaona, David Fellhauer, Kathy Dardenne, Joerg Rothe, Donald T. Reed, Amy E. Hixon, Marcus Altmaier
Summary: The impact of calcium on the Pu(IV)-EDTA system was investigated, revealing the formation of a quaternary complex CaPu(OH)4(EDTA)2- in the presence of calcium, significantly enhancing plutonium solubility.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Shuting Zhuang, Jianlong Wang
Summary: This study investigates the adsorption mechanism of cobalt ions on synthesized graphene oxide (GO) using advanced techniques such as X-ray absorption spectra (XAFS). The results show that the synthesized GO has a high surface area and abundant oxygen-containing functional groups, which allows it to effectively adsorb Co2+ ions. The adsorption process follows a pseudo-second-order kinetic model and the Langmuir model, and it is chemisorption and endothermic in nature. Oxygen-containing functional groups play a vital role in the adsorption process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Mauro Antonio Andriotti Jr, Maria Ines Basso Bernardi, Alexandre Mesquita
Summary: Phosphor materials with narrow emission bands and high quantum efficiency, such as SrTiO3:Pr,Al, have attracted attention for optoelectronic device applications. In this study, mesocrystal samples of Sr0.998Pr0.002Ti1-yAlyO3 were prepared and characterized using various techniques. Results showed that the hydrothermal method and Al incorporation caused structural changes and emission intensity variations, which were attributed to symmetry breaking, Ti off-center displacement, octahedral tilting, and oxygen vacancies. The study also revealed the generation of broad emission and the influence of intrinsic defects on the optical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Pavel Gostishchev, Danila Saranin, Lev Luchnikov, Dmitry Muratov, Artur Ishteev, Marina Voronova, Dmitry Gets, Efim Argunov, Thai Son Le, Sergey Didenko, Aldo Di Carlo
Summary: This article presents new insights into stabilizing p-i-n perovskite solar cells (PSCs) and modules using CsCl additives. The inclusion of chlorine in the perovskite crystal structure resulted in decreased lattice parameters, increased bandgap value, and longer charge carrier lifetimes. The champion PSCs based on the CsFAPbI(3-x)Cl(x) absorber showed improved power conversion efficiency and increased light-soaking stability. Additionally, the potential of Cl-anion engineering for perovskite modules was demonstrated, achieving high efficiency and stability.
Article
Materials Science, Multidisciplinary
Akihiro Uehara, Daisuke Akiyama, Atsushi Ikeda-Ohno, Chiya Numako, Yasuko Terada, Kiyofumi Nitta, Toshiaki Ina, Shino Takeda-Homma, Akira Kirishima, Nobuaki Sato
Summary: This study characterizes the fuel debris at Fukushima Daiichi Nuclear Power Station and investigates the reaction mechanisms and composition of reaction products for mixed UO2-ZrO2 compounds under different atmospheres. The findings provide insights into the interaction between nuclear fuels and cladding materials, which can facilitate the simulation of decontamination procedures.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Chemistry, Physical
R. Rajaramakrishna, B. Damdee, K. Kirdsiri, C. Saiyasombat, P. Kidkhunthod, S. Kothan, J. Kaewkhao
Summary: The research focuses on the structural changes, coordination, and interatomic distance of Europium doped Li2O-MO-B2O3 (M = Mg, Sr) glasses. The characteristics of Eu3+ ions in lithium magnesium borate and lithium strontium borate glasses are analyzed using extended X-ray absorption fine structure analysis. The XANES spectra of Eu2O3 content doped in these glasses indicate the presence of Eu3+ state under X-ray incidence. The study investigates the metal LIII edges and K edges relevant to alkaline earth ion glasses and their interactions with the local environment.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
R. R. Urkude, S. N. Jha, A. K. Yadav, U. A. Palikundwar
Summary: The study revealed that Sb atoms substitute for Bi sites in the quintuple layers of topological insulating materials (Bi1-xSbx)(2)Te-3, showing a trivalent character. The EXAFS measurements provide local structure parameters such as bond distances and coordination numbers for different shells, aiding in understanding the relationship between bulk topological insulating states and structural parameters in these compounds.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Environmental Sciences
Sikhumbuzo Charles Kunene, Kuen-Song Lin, Ndumiso Vukile Mdlovu, Wei-Cheng Shih
Summary: This study investigated the concentration profiles and speciation of Cu and Zn in contaminated oyster soft tissues using various spectroscopic methods. The results showed that Cu and Zn primarily existed as oxides in contaminated oysters, while they were mainly present as sulfides in non-contaminated oysters. These findings contribute to a better understanding of the chemical speciation of Cu and Zn in oyster soft tissues and the bio-accumulation of trace metals.
Article
Chemistry, Physical
Roberto A. Colina-Ruiz, Juan A. Hoy-Benitez, Juan S. Lezama-Pacheco, Jose Mustre de Leon, Francisco J. Espinosa-Faller
Summary: The local atomic structure of Zn1-xNixS thin films was investigated using X-ray absorption spectroscopy. The presence of a contraction in the Ni-S bond distance and the existence of nanoscopic metallic Ni phase were observed as Ni concentration increases. The difference between local and average crystalline structures is important for determining the electronic properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Arkaprava Das, C. Balasubramanian, Prachi Orpe, Gian Marco Pugliese, Alessandro Puri, Augusto Marcelli, Naurang L. Saini
Summary: Large quantity of various types of cobalt oxide nanoparticles can be synthesized using high temperature arc plasma method under different arc currents and gas environments. The phase fraction, shape, size distribution, and magnetic properties of the synthesized nanoparticles are determined by the arc current and selected gas. X-ray diffraction and absorption spectroscopy confirm the formation of multicomponent phase nanoparticles. Metallic nanoparticles are observed in helium environment at high arc current, while particle-particle interaction leads to larger particle size and lower coercivity in air ambient.
Article
Engineering, Environmental
Rasangika Thathsaranee Weligama Thuppahige, Sandhya Babel
Summary: The study evaluates the environmental impact of a full-scale anaerobic digestion plant in Sri Lanka, identifying various environmental burdens throughout its life cycle. It highlights the need to address the direct gaseous emissions and digestate generation in order to reduce burdens from the plant.
WASTE MANAGEMENT & RESEARCH
(2022)
Review
Environmental Sciences
Hoang Dung Nguyen, Sandhya Babel
Summary: This study critically reviews the nitrogen removal process and influencing factors in various MFC configurations, highlighting shortcut nitrification-autotrophic denitrification and heterotrophic anodic denitrification as promising options, although further evaluation on efficiency and gas emissions is needed. The selection of MFC configuration depends on the nature of the wastewater.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Rasangika Thathsaranee Weligama Thuppahige, Shabbir H. Gheewala, Sandhya Babel
Summary: Composting is an environmentally and economically friendly method for managing organic solid waste, but it also has unavoidable environmental impacts such as atmospheric emissions and resource consumption. A study assessing the environmental impacts of a full-scale composting plant in Sri Lanka found that the system created burdens for global warming, stratospheric ozone depletion, and other factors, while also avoiding several other negative impacts.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2022)
Article
Environmental Sciences
Indika Thushari, Sandhya Babel
Summary: Used cooking oil (UCO) is a valuable resource that can be utilized in different ways. This study assessed the environmental impacts of potential UCO valorization options in Thailand and found that energy recovery-based management options showed better environmental performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Marine & Freshwater Biology
Chayarat Srisunont, Alongot Intarachart, Treeranut Srisunont, Sandhya Babel
Summary: This study investigates the relationships between atmospheric parameters, seawater quality, and green mussel production. The findings show that air temperature and rainfall affect seawater temperature and salinity, while nutrients and dissolved oxygen, temperature and salinity, and nutrients and pH are key factors influencing mussel production. Simulation results indicate that when air temperature reaches 34 degrees C and rainfall exceeds 200 mm per month, mussel production deteriorates. The study suggests that locations with less riverine influence can provide higher mussel productivity under climate change events.
Article
Environmental Sciences
Katekanya Tadsuwan, Sandhya Babel
Summary: This study compares the efficiency of microplastic removal in two wastewater treatment plants in Bangkok and finds that wastewater treatment plants equipped with ultrafiltration have higher removal efficiency.
Article
Environmental Sciences
Anh Tuan Ta, Piyathida Pupuang, Sandhya Babel, Li Pang Wang
Summary: Recent studies have shown that bivalves can serve as bioindicators for microplastic pollution. This study investigated the presence of microplastics in blood cockles and green mussels from aquaculture farms and markets in Thailand. The results indicate that the number of microplastics in bivalve samples from the markets is higher than in the aquaculture farms, possibly due to contamination during packaging and transportation processes. The dominant types of microplastics found were fragments and fibers, with polypropylene, polyethylene, copolymer, polyester, and nylon being the most common polymers.
Article
Materials Science, Multidisciplinary
Saifon Kullyakool, Kazuto Hatakeyama, Pongtanawat Khemthong, Sandhya Babel, Kritapas Laohhasurayotin
Summary: A 2D/2D nanostructured hybrid composite was developed by intercalating nitrate ions into zinc-aluminum layered double hydroxide (LDH) on graphene oxide (GO) thin layers. This hybrid composite exhibited improved physicochemical properties and efficient adsorption performance for cationic and anionic dyes. The fast-forming mechanism of LDH in the presence of GO was revealed, suggesting the potential application of this hybrid system in water decontamination, controlled release, and delivery system.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Hoang Dung Nguyen, Sandhya Babel
Summary: This study investigated power generation from treating different COD/N ratio wastewater by isolating the input nitrogen using the coupled MFC system, including nitrification-MFC (N-MFC) and denitrification-MFC (D-MFC). Energy from wastewater was predominantly recovered in the N-MFC due to the system's configuration, which allowed for the oxidation of over 75% of organic matter input while simultaneously isolating nitrogen input. The second mode utilized the short-cut nitrification-denitrification process, superior to the first mode with regards to energy efficiency and nitrogen removal. However, the usage of CEM as separator and aeration requirement makes this technology expensive.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Christian R. Orozco, Somnuk Tangtermsirikul, Takafumi Sugiyama, Sandhya Babel
Summary: The environmental impacts of low calcium oxide (CaO) and high CaO fly ash in mass concrete mixtures from Thailand were assessed in this study. The results show that regardless of type, the use of 25% and 50% fly ash as a cement replacement can reduce the global warming potential of concrete. High CaO fly ash has greater environmental benefits. However, long-distance transport has a significant impact on ionizing radiation and ecotoxicity indicators for different environments.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Ngo Anh Dao Ho, Van Hieu Nguyen, Sandhya Babel
Summary: This study employed an integrated process to treat highly toxic wastewater from various industrial effluents and demonstrated the effectiveness of the Fenton-coagulation and reverse osmosis (RO) membrane treatment. The treated water met the national discharge standard and showed potential for reuse. The study provides valuable information and data for WWTP owners to achieve stable performance and economic efficiency.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Review
Engineering, Environmental
Pariatamby Agamuthu, Sandhya Babel
Summary: This article explores solid waste management in Asia over the past five decades and identifies the issues and challenges. Waste generation has increased in all countries over the past 50 years, although a decline has been observed recently in Japan and Korea. Organic waste, particularly kitchen waste, has been the predominant composition. The article explains the need for material extraction and productivity to sustain the densely populated region. Waste management technologies have evolved, with a gradual transition from landfills to waste-to-energy options in many countries. However, landfilling and open dumps still remain the primary disposal choice in most developing Asian countries. This raises concerns about dumpsite management, the informal sector, waste collection, open burning, and food waste. The article also observes increasing trends in recycling technologies and quantum in countries such as India, Indonesia, Japan, Malaysia, Singapore, South Korea, Thailand, and Vietnam. Various challenges and issues in recycling are explored in the text. Lastly, the article discusses the driving forces behind waste management in Asia and their evolution over time. Recommendations are provided to achieve sustainable waste management in Asia.
WASTE MANAGEMENT & RESEARCH
(2023)
Article
Multidisciplinary Sciences
Christian Orozco, Somnuk Tangtermsirikul, Takafumi Sugiyama, Sandhya Babel
Summary: This study aims to address the low utilization of fly ash in large-scale concrete applications in countries like the Philippines. Through endpoint impact analysis and in-depth interviews, the study found that the use of fly ash in concrete construction has impacts on human health, ecosystem, and resources. The research suggests that replacing cement with fly ash can contribute to the conservation of resources.
SCIENTIFIC REPORTS
(2023)
Article
Ecology
Hewawasam Udumullage Erangi Imasha, Sandhya Babel
Summary: Recent trends in aquaculture have resulted in significant contamination of microplastics (MPs). This study examined the presence of MPs in green mussels farms located in different parts of the Gulf of Thailand. MPs were detected in water, sediments, and mussels with a 100% detection frequency. The abundance of MPs was higher in Sriracha Bay compared to Phetchaburi. Fragmented particles were the most common type, with high-density polyethylene being the dominant polymer. Age did not significantly affect the MPs content in mussels, but there was a significant difference between farms.
REGIONAL STUDIES IN MARINE SCIENCE
(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)
