Article
Engineering, Multidisciplinary
Fetra Venny Riza, Josef Hadipramana, Ismail Abdul Rahman
Summary: In this study, a modified sandbox test was used to measure the electrical resistivity of Rice Husk Ash (RHA) as a pozzolan. The results showed a similar trend to the electrical conductivity method, and a new pozzolanic classification was proposed based on this new assessment method.
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
M. Sangeetha, Nivin Joy, G. Sriram Adhisheshan, J. Arul Kennady, S. Kamalinee, Shaik Burans Mahaboob Bashaa
Summary: The thermal properties of hybrid metal matrix composites were analyzed for electronic packaging applications, aiming to enhance device performance. The hybrid composites should possess important attributes such as increased endurance limit, elevated productivity, energizing effects, low maintenance cost, and environmental benefits. Thermal analysis through thermal diffusivity, thermal coefficient of expansion, and melting point studies was conducted on composites fabricated via liquid infiltration process.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Construction & Building Technology
Karthik A. Sabapathy, Sateesh Gedupudi
Summary: This study designed a test room using straw as a construction material and evaluated its thermal and moisture diffusivities, providing a framework for thermal design of a straw envelope.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Anas Islam, Shashi Prakash Dwivedi, Rajat Yadav, Vijay Kumar Dwivedi
Summary: This study investigates the effects of using eggshell and rice husk ash as reinforcements on the coefficient of thermal expansion, grain size, and corrosion behavior of a composite material.
WORLD JOURNAL OF ENGINEERING
(2023)
Article
Materials Science, Ceramics
V. K. Manisa, M. Porter, M. J. Whiting, R. A. Dorey
Summary: This paper explores the processing and properties of an alumina matrix composite with a percolating network of graphene oxide (GPO). Electrical conduction at room temperature is achieved under different sintering conditions, and the kinetic parameters and thermal lifetime of a specific sintered composite material are determined through thermogravimetric analysis.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Studies
Seong Hye Son, Hae In Lee, Won Chul Cho, Ui Myung Chung, Ho Won Ra, Sung Min Yoon, Jae Goo Lee, Young Woo Rhee, Myung Won Seo
Summary: Rice husk is a valuable agricultural biomass that can be used to produce high-purity SiO2 and Si. This study conducted a mechanochemical experiment to convert rice husk ash into porous Si using attrition mill and various acid leaching and heat-treatment conditions. The results showed the possibility of using eco-friendly lactic acid instead of harmful hydrochloric acid, the conversion of heat-treated GRHA to Si without acid leaching, and the importance of carbon content in RHA and GRHA for Si conversion.
ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Yafei Shi, Miaomiao Qian, Xinru Wang, Wanjia Zhang, Xuewei Zhang, Xiaofeng Wang, Yanchao Zhu
Summary: Rice husk ash (RHA)-reinforced composites are widely used in tribological applications. This study investigated two types of RHAs treated with different methods. It was found that RHA pretreated with hydrochloric acid had smaller particle size and more uniform dispersion. The results showed that composites with acid-treated RHA significantly reduced the friction coefficient.
Article
Energy & Fuels
Hossein Beidaghy Dizaji, Thomas Zeng, Hieronymus Hoelzig, Jens Bauer, Gert Kloess, Dirk Enke
Summary: The study investigated ash transformation mechanisms in silica-rich biomass fuels, revealing the impact of impurities on the atomic structure of silica, leading to altered ash melting behavior and viscosity. Chemical water washing, acid leaching, and blending rice straw with rice husk were found to strongly influence the chemical composition of ashes and improve ash melting behavior.
Article
Construction & Building Technology
Saloni Arora, Parveen Jangra, Thong M. Pham
Summary: Utilizing industrial by-products in concrete can help reduce the depletion of raw materials, but it may affect the concrete's performance. This study focused on geopolymer concrete developed from fly ash and fine rice husk ash, with partial OPC substitution. Various properties were investigated to assess the strength and durability of the concrete. The results showed that 20% OPC substitution improved workability, while 15% OPC substitution achieved the highest compressive strength and durability performance.
STRUCTURAL CONCRETE
(2023)
Article
Environmental Sciences
Gurleenjot Kaur, Neetu Singh, Anita Rajor, Raj Kumar Arya
Summary: This study investigates the sorption efficiency of rice husk ash (RHA) for DOX antibiotic and the disposability of exhausted RHA using solidification technique. Under optimized conditions, RHA achieved a DOX elimination of 98.85% with an adsorptive capacity of 17.74 mg/g. The bacterial toxicity test confirmed the complete encapsulation of DOX by the solidification technique.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Construction & Building Technology
Gowsijan Srikanth, Ashani Fernando, Kajanan Selvaranjan, J. C. P. H. Gamage, Lesly Ekanayake
Summary: The concept of using cleaner production technologies in construction is important for achieving sustainability. This study investigates the mechanical, thermal, and environmental performance of lightweight mortar incorporating agricultural waste as cement replacements. The results show that the addition of certain percentages of agro-wastes improves the thermal performance and reduces greenhouse gas emissions.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Saloni, Parveen, Thong M Pham, Yee Yan Lim, S. S. Pradhan, Jatin, Jatin Kumar
Summary: This paper presents a scientific attempt to study the performance of sustainable geopolymer concrete based on rice husk ash and ultra-fine slag, with corn cob ash used as a substitute. The study found that corn cob ash and slag significantly improved the strength and durability of concrete, suggesting potential for replacing traditional concrete in structural applications.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Mazahir M. M. Taha, Cheng-Pei Feng, Sara H. S. Ahmed
Summary: The study found that adding rice husk ash (RHA) to expansive soil samples can improve soil properties and consolidation performance. In particular, the addition of 16% RHA resulted in the most significant improvement in soil characteristics.
Article
Multidisciplinary Sciences
A. Parrillo, G. Sanchez, A. Bologna Alles
Summary: Industrial rice production generates significant amounts of rice husk and rice husk ash, which can be used as starting materials for high-value products to mitigate environmental impact and provide economic revenue. Different types of whiskers, including α-silicon nitride whiskers and silicon oxynitride whiskers, can be obtained through specific treatments.
SN APPLIED SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Samar Beaino, Peter El Hage, Rodolphe Sonnier, Sylvain Seif, Roland El Hage
Summary: This study focuses on the synthesis of a new thermal insulating geopolymer using alkaline activation of fly ashes. The addition of foaming agents can be avoided by using a high ratio of solution/ashes. Rice husks are incorporated into the formulation to increase porosity and ecological sustainability. The microstructural characteristics of the geopolymers were analyzed using various techniques, and thermal and mechanical properties were evaluated based on different solution/ashes ratios and rice husk contents.
Article
Chemistry, Physical
Niklas Oefner, Franziska Heck, Marcel Duerl, Leon Schumacher, Humera Khatoon Siddiqui, Ulrike Kramm, Christian Hess, Angela Moller, Barbara Albert, Bastian J. M. Etzold
Summary: In this study, iron molybdate catalysts synthesized by co-precipitation and ball-milling solid-state synthesis were applied as catalysts for ethanol oxidative dehydrogenation. Both catalysts showed good acetaldehyde selectivity and stability, with the co-precipitation method exhibiting higher activity and selectivity.
Article
Chemistry, Inorganic & Nuclear
Johannes Moll, Christoph Foerster, Alexandra Koenig, Luca M. Carrella, Manfred Wagner, Martin Panthoefer, Angela Moeller, Eva Rentschler, Katja Heinze
Summary: The study investigates the electronic ground states and excited states of different iron complexes, as well as their charge transfer processes and metal center behavior, in order to expand and exploit the useful properties of these complexes in potential magnetic, photophysical, or magnetooptical applications.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Luis A. Gonzalez, Vianey Sanchez-Cardona, Jose Escorcia-Garcia, Miguel A. Melendez-Lira
Summary: Undoped and Ce-doped ZnS nanocrystals were synthesized using a low-temperature aqueous solution method with L-cysteine as a complexing and capping agent. The nanocrystals were polydisperse with sizes ranging from 2-4 nm, and all samples were sulfur deficient. X-ray photoelectron spectroscopy confirmed the presence of Ce3+ in the Ce-doped samples. UV-vis spectroscopy showed a blue shift in the optical bandgap compared to bulk ZnS. Room-temperature photoluminescence studies revealed a broad band emission consisting of UV and blue components due to ZnS defects, as well as a green component from the 5d-4f transition of Ce3+.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Franz Kamutzki, Maged F. Bekheet, Soren Selve, Felix Kampmann, Konrad Siemensmeyer, Delf Kober, Roland Gillen, Markus Wagner, Janina Maultzsch, Aleksander Gurlo, Dorian A. H. Hanaor
Summary: A novel sodium gadolinium pyroxene (NaGdSi2O6) was successfully synthesized and its crystal structure was determined. The sodium gadolinium pyroxene showed weak antiferromagnetic coupling, but no long-range magnetic order was observed above 2 K.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Engineering, Biomedical
Shumin Pang, Dongwei Wu, Aleksander Gurlo, Jens Kurreck, Dorian A. H. Hanaor
Summary: Additively manufactured hollow-strut bioceramic scaffolds offer a promising strategy for patient-tailored bone tissue engineering, providing pathways for nutrient and cell transport and promoting osseointegration and vascularization. This study presents a slurry based additive manufacturing approach for modified diopside bioceramics, producing hollow-strut scaffolds with diverse cross-sectional forms. Mechanical characterization showed that square outer cross-sections for hollow struts in woodpile scaffolds result in higher compressive strength compared to solid cylindrical strut scaffolds, despite lower density. Hollow struts in bioceramic scaffolds significantly enhance cell attachment and proliferation and have potential for new bone tissue formation. This work provides a controlled method for extrusion-based 3D printing of hollow strut scaffolds, enhancing functional and mechanical performance in bone tissue engineering scaffolds.
Article
Chemistry, Multidisciplinary
Aidin Nejadsalim, Najmeh Bashiri, Hamid Reza Godini, Rafael L. Oliveira, Asma Tufail Shah, Maged F. Bekheet, Arne Thomas, Reinhard Schomaecker, Aleksander Gurlo, Oliver Goerke
Summary: One-dimensional core-sheath nanofibers consisting of platinum-loaded ceria sheath on mesoporous silica core were successfully synthesized and used as catalysts for the reverse water gas shift reaction. The core-sheath nanofibers had a core diameter of 100-300 nm and a sheath thickness of 40-100 nm with a Pt loading of 0.5 wt.%. The impregnated catalyst, Pt-CeO2 NF@mesoporous SiO2, showed the best catalytic performance with a CO2 conversion of 8.9% at 350 degrees C.
Review
Chemistry, Physical
Celal Avcloglu, Suna Avcloglu, Maged F. Bekheet, Aleksander Gurlo
Summary: This critical review summarizes the recent progress in modifying strontium titanate (SrTiO3) photocatalyst for overall water splitting applications. Different modification techniques, including cocatalyst loading, crystal-facet engineering, reduction of bulk defects, heteroatom doping, and constructing Z-Scheme water splitting systems, are discussed. The development of photocatalyst sheets and panel reactors for large-scale hydrogen generation and current challenges in solar hydrogen generation by SrTiO3 photocatalyst are also addressed.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Oleksandr Ovsianytskyi, Maged F. Bekheet, Albert Gili, Aleksander Gurlo
Summary: The sensing response of metal oxides activated with noble metal nanoparticles is affected by changes in the chemical state of the elements. In this study, a PdO/rh-In2O3 gas sensor was investigated for H2 gas detection. The composition and chemical state of elements were examined during operation. It was found that the sensor showed a series of structural and chemical transformations, leading to a decrease in sensing response.
Article
Chemistry, Physical
Marcel Duerl, Kevin Sowa, Martin Panthoefer, Niklas Oefner, Danny Stark, Bastian J. M. Etzold, Angela Moeller
Summary: The catalytic activity and selectivity of Fe2(MoO4)3 obtained from solid-state synthesis protocols were studied for the oxidative dehydrogenation of ethanol to acetaldehyde. Ball-milling of the solid-state synthesis precursors improved the activity, and the correlation between ball-milling time, defect concentration, and catalytic activity was investigated. The defect structures introduced by ball-milling were found to affect the catalytic activity and selectivity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Leander Haug, Christoph Thurner, Maged F. Bekheet, Kevin Ploner, Benjamin Bischoff, Aleksander Gurlo, Martin Kunz, Bernhard Sartory, Simon Penner, Bernhard Kloetzer
Summary: To investigate the synergistic action of differently prepared Ni-ZrO2 phase boundaries in methane dry reforming, three catalyst systems including an inverse near-surface intermetallic NiZr catalyst precursor, bulk-intermetallic NixZry material, and a supported Ni-ZrO2 catalyst were compared. All three catalysts exhibit stable and highly efficient methane dry reforming activity with improved resistance to coke deposition due to the presence of extended Ni-ZrO2 phase boundaries formed by in situ activation. Methane is decomposed to carbon at metallic Ni-0 surface sites, while CO2 is converted to CO at reduced Zr centers at the phase boundaries. The surface-ZrO2 modified bulk Ni-0 catalyst shows the best decoking and carbon conversion conditions, attributed to the dispersed ZrO2 islands and short diffusion pathways for carbon.
Article
Polymer Science
Fabian Zemke, Julien Gonthier, Ernesto Scoppola, Ulla Simon, Maged F. F. Bekheet, Wolfgang Wagermaier, Aleksander Gurlo
Summary: Ambient pressure drying (APD) has the potential to reduce the cost of aerogel fabrication. This study investigates the effect of different silylation agents on the re-expansion of SiO2 aerogels after drying. The results show that while some physical properties were significantly affected by re-expansion, silylation did not always result in full re-expansion. The impact of silylation in tailoring the re-expansion behavior is crucial for APD of monolithic aerogels.
Article
Chemistry, Multidisciplinary
Wuqi Guo, Oyku Icin, Cekdar Vakifahmetoglu, Delf Kober, Aleksander Gurlo, Maged F. Bekheet
Summary: Tin-containing silicon oxycarbide nanobeads are synthesized and tested as anode for magnesium-ion batteries. The battery performance is influenced by surface area and tin content of the nanobeads. The silicon oxycarbide nanobeads enhance cycling stability and capacity, while higher tin content improves rate performances.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Pharmacology & Pharmacy
Veli Cengiz Ozalp, Samet Ucak, Ali D. Dursun, Mert Sudagidan, Oyku Icin, Cekdar Vakifahmetoglu, Laura M. Henning, Ulla Simon, Aleksander Gurlo
Summary: Different types of ordered mesoporous silica (OMS) nanoparticles, including COK-12 and modified COK-12, have been used as drug carriers for controlled drug adsorption and release. Cytotoxicity analysis showed that regular COK-12 particles had lower harm to mammalian cultured cells compared to other OMS nanoparticles. Regular COK-12 was further used as a carrier for a dual antibiotic-loaded drug delivery material, which showed enhanced antibiotic treatments against methicillin-resistant Staphylococcus strains through aptamer targeting.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
Marena Molano-Mendoza, R. Melendrez, Luis A. Gonzalez
Summary: In this study, the thermoluminescence response of β-irradiated SrHfO3 powders synthesized by the Pechini-type sol-gel process was investigated. The intensity of the thermoluminescence signal increased with the irradiation dose, showing a linear behavior in the range of 2.55-51 Gy and a sublinear behavior for higher doses. The analysis of trap distribution and kinetic parameters revealed that the thermoluminescence glow curves could be fitted by five glow peaks with activation energies ranging from 0.56 to 0.99 eV, indicating the influence of density and distribution of defects on the thermoluminescence response.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Ceramics
Haotian Yang, Sophie Klemm, Julian Mueller, Maged F. Bakheet, Aleksander Gurlo, Dorian A. H. Hanaor
Summary: Three compositions of high-entropy carbides were synthesized using a modified Pechini process and citric acid as a cation chelating agent and carbon source. Single phase high-entropy carbides were formed through pyrolysis and spark plasma sintering at a relatively low temperature of 1800 degrees C. The dispersion of cations in the polymer precursor resulted in improved compositional homogeneity and a finer microstructure in the polymer-derived materials, leading to enhanced fracture toughness with a K-IC value of 4.29 MPa.m(1/2) achieved for (TiHfVNbTa)C.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(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)
