Article
Chemistry, Physical
Ruoyu Chen, Xinxin Jin, Daqian Hei, Peng Lin, Feng Liu, Jie Zhan, Dong Lao, Minghui Li, Wenbao Jia, Qing Shan, Saisai Li
Summary: This study investigated the improvement of flexural strength and thermal shock resistance of porous silicon carbide ceramics through the addition of carbon fibers to the infiltration slurry. The results showed a significant enhancement in flexural strength and thermal shock resistance, especially with the addition of 3 mm long carbon fibers which increased flexural strength by 142% and improved thermal shock resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Guodong Sun, Zhiqiang Tan, Qing Zhang, Yi Zhang, Xuqin Li, Qinglai Tian, Yuxing Tang
Summary: High-performance carbon/carbon (C/C) bolts are necessary for connecting thermally-insulating structural components of aerospace vehicles. A new silicon infiltration-modified C/C (C/C-SiC) bolt was developed, and its effects on microstructure and mechanical properties were studied. The study found that silicon infiltration formed a dense and uniform SiC-Si coating, enhancing the load-bearing capacity of C/C bolts.
Article
Nanoscience & Nanotechnology
Kohei Shima, Yuhei Otaka, Noboru Sato, Yuichi Funato, Yasuyuki Fukushima, Takeshi Momose, Yukihiro Shimogaki
Summary: The study investigates the impact of heterogeneous underlayers on the chemical vapor deposition of silicon carbide, finding that increasing the supply of methyltrichlorosilane and hydrogen can eliminate incubation periods while decreasing the temperature prevents carbon-rich film formation.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yirong Tian, Yangjie Li, Peng Xiao, Peng Zhou, Zhou Fang, Yang Li
Summary: This paper explores the use of Fluidized Bed Chemical Vapor Deposition (FBCVD) for the preparation of silicon-based anode materials for lithium-ion batteries. The combination of porous silicon and carbon layers resulted in the production of high-performance silicon-carbon composite anode materials. The PSi@C30 composite demonstrated excellent electrochemical performance, with a high initial coulomb efficiency and cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Juvencio Vazquez-Samperio, Prospero Acevedo-Pena, Ariel Guzman-Vargas, Edilso Reguera, Elcy Cordoba-Tuta
Summary: The study introduces a binder-free 3D reticulated carbon doped with N, F, and B as an excellent choice for volumetric supercapacitor electrodes, showing that the RVC-N electrode exhibits the best performance with high volumetric capacitances, and the symmetric supercapacitor assembled with RVC-N displays good stability with 80% retention of initial capacitance after 10,000 cycles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Fengping Xiao, Xuming Yang, Tianhao Yao, Hongkang Wang, Andrey L. Rogach
Summary: A nitrogen and oxygen codoped flower-like porous carbon host derived from a Ni-based metal-organic framework (MOF) was used for selenium storage, increasing the carbon host's polarity and restricting selenium diffusion. This optimized composite showed excellent electrochemical performance as a cathode for sodium-selenium batteries.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hossein Elahi Davaji, Fatemeh Shamoradi, Masoud Panjepour, Mehdi Ahmadian
Summary: The study aimed to synthesize and characterize carbon/carbon composites using the CVI process, finding that increasing the process time led to changes in the density, specific surface area, thermal conductivity coefficient, and bending strength of the samples. The SEM images of the fracture surface indicated a weak interface between the carbon fibers and the carbon layer, with the morphology of carbon growth transitioning from laminar to rough-laminar with longer CVI process duration.
Article
Engineering, Electrical & Electronic
Fabiano da Silva Dias, Bruno Ribeiro, Mauricio Ribeiro Baldan, Newton Adriano Santos Gomes, Larissa Stieven Montagna, Mirabel Cerqueira Rezende
Summary: The use of electronic equipment is increasing, resulting in greater electromagnetic pollution. This study examined the electromagnetic behavior of polymeric composites based on a 3D-carbon structure to mitigate this issue. The results showed that the composites with higher carbon structure porosity exhibited higher electrical conductivity, while the carbon structure/epoxy resin composites demonstrated better insulation performance. The electromagnetic characterization revealed that the porosity of the composites influenced their electromagnetic shielding behavior. Overall, the composites showed good electromagnetic shielding performance, indicating their potential for various applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
O. Calixto-Lozada, J. Vazquez-Samperio, E. Cordoba-Tuta, E. Reguera, P. Acevedo-Pena
Summary: In this study, CoHCF particles were deposited on the surface of RVC foam to improve conductivity and utilize their storage capacity for Na+ ions. The composites showed enhanced electrochemical performance at high potential scan rates, potentially serving as cathode materials in sodium-ion battery technology.
SOLID STATE SCIENCES
(2021)
Article
Chemistry, Physical
Hye-gyu Kim, Wooseok Ji, Hyang Joo Kwon, Sungtae Yoon, Jung-il Kim, Soobin Bae, Nam Choon Cho
Summary: The developed 3D CVI model successfully simulates the isothermal process for fabricating carbon-carbon composites, considering gas flow behavior and chemical reactions. The model accurately predicts the evolution of preform density and porosity, offering detailed simulations not observable experimentally.
Article
Chemistry, Physical
Pierre Tomasini
Summary: The silicon chemical vapor deposition process via silane is determined using classical thermodynamics, showing that a linear function of temperature controls silicon growth rates and neatly maps the response of growth rate activation energy, providing clarity to the parameter space. The study demonstrates the portability of the linear function of temperature across reactors and extracts reactor scaling factors, reducing the complex silicon deposition process to its essentials through thermodynamics.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Ceramics
Jisu Lee, Daejong Kim, Dongwook Shin, Hyeon-Geun Lee, Ji Yeon Park, Weon-Ju Kim
Summary: Reaction-bonded silicon carbide was fabricated by liquid silicon infiltration using a porous carbon preform prepared by chemical vapor deposition to reduce excess silicon and carbon. The porosity, pore size, and carbon particle size of the material were controlled by adjusting the deposition temperature of the carbon preform. The hardness of the material increased as the amount of residual silicon decreased.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Tao Li, Yulei Zhang, Jian Zhang, Yanqin Fu, Jie Li
Summary: A SiO2-SiC reticulated layer with SiC nanowires was pre-prepared on C/C composites to improve oxidation resistance and alleviate siliconization erosion during SiC coating preparation, resulting in a compact and homogeneous SiC coating.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Shiv Prakash, Ravi Kumar, Pankaj Kumar, Sonu Rani, Khushboo Kumari, Saroj Kumari, Sanjay R. Dhakate
Summary: Graphitic carbon foam modified with multiwalled carbon nanotubes and cobalt oxide nanoparticles showed excellent electrochemical performance as an electrocatalyst for water splitting, with comparable efficiency to commercial benchmark Pt/C electrocatalyst. The modified samples also exhibited excellent electrolytic stability in 0.1 M KOH solution for 5 hours.
MATERIALS CHEMISTRY AND PHYSICS
(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
Environmental Sciences
Silvia Sizuka Oishi, Andrea Boldarini Couto, Edson Cocchieri Botelho, Neidenei Gomes Ferreira
Summary: Nitrate is a serious contaminant in water, and this study examined the electrocatalytic activity of a ternary composite material containing silver, boron-doped ultrananocrystalline diamond, and reticulated vitreous carbon for nitrate reduction. The improved preparation process allowed for more uniform electrode coverage and increased reproducibility, with silver deposition enhancing the catalytic effect on nitrate reduction.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
L. A. Pereira, A. B. Couto, D. A. L. Almeida, N. G. Ferreira
DIAMOND AND RELATED MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Dalva A. L. Almeida, Neidenei G. Ferreira
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Lania Auxiliadora Pereira, Dalva Alves de Lima Almeida, Andrea Boldarini Couto, Neidenei Gomes Ferreira
MATERIALS RESEARCH BULLETIN
(2020)
Article
Materials Science, Multidisciplinary
A. F. Sardinha, D. A. L. Almeida, L. G. Vernasqui, N. G. Ferreira
DIAMOND AND RELATED MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Andre F. Sardinha, Dalva A. L. Almeida, Neidenei G. Ferreira
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2020)
Article
Materials Science, Multidisciplinary
L. G. Vernasqui, A. F. Sardinha, S. S. Oishi, N. G. Ferreira
Summary: This study successfully synthesized high-quality porous boron-doped ultrananocrystalline diamond by pre-treating the substrate using different seeding processes. Analysis of the BDD/B-UNCD films confirmed their quality and nano-scale control, demonstrating the effectiveness of the processes used.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Lais G. A. Vernasqui, Bianca A. Kawata, A. F. A. Sardinha, Manuel A. G. Rodrigo, Neidenei G. Ferreira
Summary: In this study, boron-doped ultrananocrystalline diamond was successfully grown on titanium dioxide nanotubes without seeding pre-treatment. The growth time was found to be crucial for achieving continuous ultrananocrystalline diamond formation and desired composite morphology. The presence of diamond characteristics and TiC formation were confirmed by Raman spectra and X-Ray patterns.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Environmental Sciences
Alexsandro J. dos Santos, Guilherme Fortunato, Matheus S. Kronka, Lais G. Vernasqui, Neidenei G. Ferreira, Marcos R. Lanza
Summary: This study investigated the electrocatalytic performance of two different morphologies of boron doped diamond film electrodes in electrochemical oxidation for the removal of the antibiotic ciprofloxacin. The results showed that nanocrystalline diamond had higher sp2 carbon content and greater doping level, leading to improved surface roughness and electrocatalytic activity compared to microcrystalline diamond. The study also demonstrated the effectiveness of the nanocrystalline diamond in CIP degradation in various aqueous matrices.
ENVIRONMENTAL RESEARCH
(2022)
Article
Electrochemistry
Fernanda L. Souza, Jose J. Linares, Neidenei G. Ferreira, Marcos R. Lanza
Summary: This study demonstrates the importance of coupling different degradation processes for the removal of the herbicide HSM. The UV-irradiated hybrid processes show outstanding performance, achieving high mineralization degrees in a short period of time. Combining UV irradiation with hybrid treatment processes can improve mineralization degree and accelerate the degradation of the compound of interest.
Article
Environmental Sciences
Lais G. Vernasqui, Alexsandro J. dos Santos, Guilherme V. Fortunato, Matheus S. Kronka, Haruna L. Barazorda-Ccahuana, Ana S. Fajardo, Neidenei G. Ferreira, Marcos R. V. Lanza
Summary: This study reported the use of an ultranano-diamond electrode with a highly porous structure for the treatment of water containing carbaryl. The results showed that the proposed electrode was able to efficiently remove the pollutant and meet the water quality standards for human consumption. The findings of this study demonstrate the potential application value of the electrode.
Article
Materials Science, Multidisciplinary
Raissa Samira Rocha da Silva, Silvia Sizuka Oishi, Luiza dos Santos Conejo, Edson Cocchieri Botelho, Neidenei Gomes Ferreira
Summary: In this study, the addition of expanded graphite (EG) on environmentally friendly polymer matrix was systematically investigated to produce carbon-polymer porous composite. EG facilitated crosslink formations and reduced the onset and endset temperatures. The PFA resin exhibited good fluidity and could be uniformly impregnated on the polyurethane foams.
MATERIA-RIO DE JANEIRO
(2022)
Article
Materials Science, Multidisciplinary
Guilherme Charles Blanco, Manuella Gobbo de Castro Munhoz, Aline Castilho Rodrigues, Andres Cuna, Ana Claudia Pina, Jossano Saldanha Marcuzzo, Mauricio Ribeiro Baldan
Summary: Carbon material is widely used in advanced energy storage devices, with research focusing on new forms of carbon like nanotubes and graphene. Converting human hair into carbon filaments for supercapacitors shows promise in energy storage technology development.
MATERIA-RIO DE JANEIRO
(2021)
Article
Materials Science, Multidisciplinary
Nila Cecilia de Faria Lopes Medeiros, Leonardo Iusuti de Medeiros, Ariane Aparecida Teixeira de Souza, Guilherme Frederico Bernardo Lenz e Silva, Alan Fernando Ney Boss, Gisele Aparecida Amaral-Labat, Mauricio Ribeiro Baldan
Summary: This study presents the electromagnetic properties of a Radar Absorbing Material (RAM) made with Silicon Carbide (SiC) and Carbon Black (CB) as additives. The results show that the SiC/CB composite with 1 wt% of CB exhibited the best electromagnetic radiation absorption at 16.8 GHz.
MATERIA-RIO DE JANEIRO
(2021)
Article
Materials Science, Multidisciplinary
Alan Fernando Ney Boss, Helena Ravaglia Ferreira, Flavia Lega Braghiroli, Gisele Aparecida Amaral-Labat, Ariane Aparecida Teixeira de Souza, Hassine Bouafif, Ahmed Koubaa, Mauricio Ribeiro Baldan, Guilherme Frederico Bernardo Lenz e Silva
Summary: The study investigated a composite material made of silicone rubber and biochar in radar absorbing applications, demonstrating how the biochar composite as a double-layer structure can improve the Reflection Loss of absorbing materials and achieve a broader absorption bandwidth. When combined with ferrite-based RAM, the biochar composite can achieve better Reflection Loss at the same thickness, showing a sustainable, cheaper, and lighter material application method.
MATERIA-RIO DE JANEIRO
(2021)