Article
Chemistry, Multidisciplinary
Xiaoxiao Wei, Xiaojian Wen, Yingying Liu, Chen Chen, Chao Xie, Dongdong Wang, Mengyi Qiu, Nihan He, Peng Zhou, Wei Chen, Jun Cheng, Hongzhen Lin, Jianfeng Jia, Xian-Zhu Fu, Shuangyin Wang
Summary: This study proposes a new method for synthesizing urea at ambient conditions, which improves the efficiency of the C-N coupling reaction by stabilizing the crucial intermediate through the insertion of oxygen vacancies. The existence of oxygen vacancy-mediated selective C-N coupling reaction is verified through in situ spectroscopy techniques. The introduction of oxygen vacancies transforms the common catalyst carrier into an efficient electrocatalyst, with a higher urea yield rate compared to partial noble-metal-based electrocatalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Ceramics
Shuai Wang, Xianjuan Pang, Zhiyuan Zhang, Baolin Chang, Jun Yang, Chenfei Song, Sanming Du, Yongzhen Zhang
Summary: Single-phase polycrystalline Mo2BC ceramic bulks were successfully synthesized using spark plasma sintering method at a low synthesis temperature of 1300 degrees C. The ceramic exhibited high Vickers hardness and typical brittle features, with intergranular and transgranular fractures as the main failure modes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
C. Esther Jeyanthi, C. Karnan, A. Kistan, R. Siddheswaran
Summary: Co-doped ceria nanopowders, Ce1-xCoxO2 (x = 0.1, 0.2 and 0.3mol.%), were synthesized using citrate-nitrate auto-combustion method at 500 degrees C. The crystal structure of ceria was confirmed to be cubic fluorite by X-ray diffraction analysis. UV-Visible and FT-IR spectroscopic analyses revealed the charge transfer and functional groups in the nanoparticles. Photoluminescence spectroscopy confirmed the visible light emission due to vacancies, with different wavelengths corresponding to oxygen and cerium bands. Scanning electron microscopy and high resolution transmission electron microscopy were utilized to analyze the porosity, particles size, shape, and distribution. The presence of constituent elements and weak ferromagnetism were confirmed by energy dispersive X-ray spectroscopy and vibrating sample magnetometry, respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
N. S. Larionova, R. M. Nikonova, V. I. Ladyanov
Summary: Alumothermic self-propagating high-temperature synthesis was used to obtain a 2Nb-1Si-1C composite material. The morphology, structure, and phase composition of the composite were studied using X-ray diffraction and scanning electron microscopy. It was found that γ-Nb5Si3, NbC, and NbSi2 phases were formed in the sample.
Article
Chemistry, Analytical
Olivier De Castro, Jean-Nicolas Audinot, Hung Quang Hoang, Cherif Coulbary, Olivier Bouton, Rachid Barrahma, Alexander Ost, Charlotte Stoffels, Chengge Jiao, Mikhail Dutka, Michal Geryk, Tom Wirtz
Summary: The article introduces the use of magnetic sector secondary ion mass spectrometry (SIMS) on a widely used instrument, focused ion beam (FIB)-scanning electron microscopy (SEM), for nanoscale investigations. It provides a detailed description of the instrument's layout and performance, as well as the research results obtained in various fields. The system demonstrates versatile capability for high-performance correlative studies in materials science and life sciences.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Tomitsugu Taguchi, Shunya Yamamoto, Hironori Ohba
Summary: The study successfully synthesized double-thick-walled (DTW) silicon carbide (SiC) nanotubes with unique structures and properties. Experimental results showed that DTW SiC nanotubes with perfect structures can only be synthesized with an MWCNT wall thickness of at least 50 nm.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Sanjib Majumdar, Shubham Kumar, Bhaskar Paul, Jugal Kishor
Summary: In this study, high purity Fe-B alloy was prepared through alumino-silico-thermic co-reduction of Fe2O3 and B2O3. Differential thermal analysis revealed the reduction behavior of Fe2O3 and B2O3 with Al and Si. The formation of aluminum and silicon borides was avoided by using sub-stoichiometric amounts of Al and Si.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Christian Saringer, Michael Tkadletz, Josef Thurner, Christoph Czettl, Nina Schalk
Summary: Using thermally activated chemical vapor deposition (CVD), Ti1-xAlxN coatings with Al contents up to x > 0.8 can be synthesized due to their high global Al content and self organized nanolamellar microstructure. However, the formation mechanism of the microstructure and the resulting coating properties are not fully understood. The study investigates the effects of deposition temperature, pressure, and gas feed rotation speed on the microstructure and mechanical properties.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Y. Jiraskova, J. Bursik, O. Zivotsky, J. Lunacek, P. Alexa, R. Uhlar, J. Ederer, P. Janos
Summary: Magnetite and magnetite/ceria composites were prepared using chemical methods and underwent calcination treatment. The ceria content and calcination temperature were found to greatly affect the degradation ability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Bhaskar Bhaduri
Summary: In this study, copper nanoparticles grown carbon nanofibers (Cu-CNFs) were synthesized on graphite powder using catalytic chemical vapor deposition (CVD) method with acetylene as the carbon source. The CNFs were heat treated under inert atmosphere, and the analysis showed that the synthesis followed tip growth mechanism, with the material being of high purity confirmed by EDS and XPS analysis.
Article
Materials Science, Ceramics
Katharina Kruppa, Itzhak I. Maor, Frank Steinbach, Vadim Beilin, Meirav Mann-Lahav, Mario Wolf, Gideon S. Grader, Armin Feldhoff
Summary: Oxide-based ceramics offer promising thermoelectric materials for recycling high-temperature waste heat. In this study, electrospun nanofibers of calcium cobaltite were compacted to improve the functional performance of the material and achieve thermal stability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Environmental
Jie Li, Yi Li, Pengli Chen, Kuppusamy Sathishkumar, Yumiao Lu, Saraschandra Naraginti, Yunbo Wu, Haisuo Wu
Summary: This study investigated the facilitated biological nitrate removal using ecofriendly green synthesized reduced graphene oxide (rGO) as an electron shuttle. The addition of rGO significantly enhanced the nitrate removal by donating electrons, and the rGO-biofilm showed increased photocurrent response. The study also identified several dominant genera involved in the denitrification process. Overall, the findings suggest that green synthesized rGO can be used as an ecofriendly electron shuttle for facilitated biological denitrification.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Itzhak I. Maor, Katharina Kruppa, Adi Rozencweig, Amir Sterzer, Frank Steinbach, Vadim Beilin, Bernd Breidenstein, Gennady E. Shter, Meirav Mann-Lahav, Armin Feldhoff, Gideon S. Grader
Summary: Calcium cobaltite Ca3Co4-xO9+δ (CCO) is a promising p-type thermoelectric material with anisotropic properties. Texturing and nanostructuring are favored to improve its performance. This study successfully assembled electrospun CCO nanoribbon ceramics with high electrical conductivity and greatly enhanced Seebeck coefficient, surpassing previous performances. The textured nanoribbon ceramic also achieved a relatively large figure-of-merit, making it a notable advancement in CCO thermoelectric materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Environmental Sciences
M. Mani, R. Harikrishnan, P. Purushothaman, S. Pavithra, P. Rajkumar, S. Kumaresan, Dunia A. Al Farraj, Mohamed Soliman Elshikh, Balamuralikrishnan Balasubramanian, K. Kaviyarasu
Summary: In this study, nanostructured silver particles (NS-AgPs) were successfully synthesized using bio active agents present in Cleome gynandra leaf extracts via green synthesis. Various analytical techniques such as UV-vis, FTIR, SEM, TEM, DLS, and antibacterial studies were utilized to confirm the existence, size, stability, and antibacterial activity of NS-AgPs.
ENVIRONMENTAL RESEARCH
(2021)
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)