Article
Materials Science, Ceramics
Suna Avcioglu, Figen Kaya, Cengiz Kaya
Summary: A novel non-catalytic sol-gel route was used to synthesize nano/micro boron carbide fibers by manipulating the growth kinetics of boron carbide particles through in-situ decoration with boric acid crystals during thermal decomposition. This approach successfully produced highly crystalline boron carbide particles and various morphologies of boron carbide, such as rhomboid-plate, nanobelt, and fiber. By tailoring the structure of the preceramic precursor, the formation of boron carbide fiber was increased while polyhedral-equiaxed particles were decreased in the final products.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Abolhassan Najafi, F. Golestani-Fard, H. R. Rezaie, Saviz Parsa Saeb
Summary: SiC-B4C nano powders were synthesized through sol-gel process in water-solvent-catalyst-dispersant system. The formation mechanism of the product during sol-gel process was evaluated using TEM, SEM, DTA/TG, BET, XRD, FTIR and DLS analysis methods. The nanoparticles had a high surface area and meso porous surfaces, with SiC-B4C particles in the range of 20-40 nm.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Suna Avcioglu, Zeynep Naz Ates, Erol Kam, Cengiz Kaya, Figen Kaya
Summary: In this study, B4C-BN nanocomposite powders were successfully synthesized using the sol-gel method, and the effects of polyelectrolyte on phase content, particle size, and morphology were investigated. The results showed that the addition of ammonium polycarboxylate as a dispersing agent and a nitrogen source could control the dimensions, crystallinity, and B4C to BN phase ratio of the synthesized powders.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Sarmad Naim Katea, Lars Riekehr, Gunnar Westin
Summary: Carbothermal reduction of Zr-sucrose gels powders into nano-phase ZrC or ZrC-Zr(C, O) core-shell powders was achieved by using a composite of 2-4 nm sized ZrO2 and amorphous carbon. The resulting products varied in morphology and structure depending on the sucrose-carbon:Zr ratio in the gels.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Mahnaz GahremanDerakhshan, Leila Nikzad, Mohammad Farvizi, Touradj Ebadzadeh
Summary: Composite powders containing titanium diboride and boron carbide were prepared by the sol-gel method under different conditions, and the structure and phases were studied. With increasing boron oxide content, unwanted phases decrease, providing important references for the synthesis of composite powders.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Engineering, Environmental
Fatih Ozcan, Kubra Yilmaz, Seref Ertul, Esra Maltas Cagil
Summary: A new pH-sensitive polysaccharides-based boron carbide sol-gel system with Donepezil was prepared. The release of Donepezil from these hybrid sol-gels was studied at various pH levels, and the results showed that BC-TEOS and BC-TEOS-beta-CD released the maximum amount of Donepezil at pH 7.4, while BC-TEOS-Wax had a better prolonged release effect at pH 8.6.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Nanoscience & Nanotechnology
Tengyu He, David G. Bradley, Jiajing Zhou, Alec Jorns, Yash Mantri, John Hanna, Jesse Jokerst
Summary: Phosphate-based glasses, especially in micro/nanoparticle form, show excellent biodegradability and biocompatibility, making them promising for applications in drug delivery, bioimaging, degradable implants, and tissue engineering. The synthesis of calcium phosphate micro/nanoparticles (CPPs) using sol-gel and electrospray methods allows for control of size and morphology, with an average diameter ranging from 345-952 nm. The hydration process of CPPs in neutral aqueous media leads to significant increase in size and volume, with potential applications in tissue ablation and cell destruction.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
L. M. Anovitz, A. Affolter, M. C. Cheshire, A. J. Rondinone, Lawrence F. Allard
Summary: Feldspars are common minerals in the Earth's crust and synthesizing them has been a challenge, requiring high pressures, high temperatures, and hydrothermal environments. This paper introduces a method for albite synthesis that does not require high-pressure environments, allowing for controlled elemental substitutions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
E. Piatti, E. Verne, M. Miola
Summary: This study reports for the first time the sol-gel synthesis of bioactive glass nanoparticles containing both boron and copper oxides. The obtained nanoparticles have good morphology, composition, and bioactivity. Future investigations will focus on the biological characterizations of cytotoxicity, antibacterial properties, and pro-angiogenetic abilities.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Malihe Zeraati, Parya Kazemzadeh, Mahmood Barani, Ghasem Sargazi
Summary: In this study, a multi-attribute group decision-making fuzzy model was used to evaluate different carbon sources for the synthesis of silicon carbide. Sugar was identified as the best carbon precursor, leading to the successful synthesis of crystalline SiC nanostructures. Multiple analyses were employed to characterize the products effectively.
Article
Materials Science, Ceramics
M. Miola, E. Piatti, P. Sartori, E. Verne
Summary: An optimized sol-gel process was developed to synthesize spherical and monodispersed bioactive glass nanoparticles doped with boron and copper, and various synthesis parameters were investigated. The optimized glass particles exhibited a spherical shape, good ions incorporation, and good dispersion. The addition of boron and copper did not interfere with the glass's ability to induce the precipitation of hydroxyapatite in vitro. The shape, dispersion, bioactive behavior, and content of boron and copper make these novel bioactive glass particles highly promising for tissue engineering applications in both hard and soft tissues.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Fahimeh Sharifi, Zahra Mahmoodi, Saloumeh Mesgari Abbasi, Abolhassan Najafi, Gholamreza Khalaj
Summary: Titanium carbide nanopowders and nanowhiskers were synthesized using the sol-gel process with phenolic resin and titanium alkoxide as precursors. The synthesis temperature and soaking time were found to affect the free carbon content and the formation and morphology of TiC nanopowders. Nucleation of titanium carbide occurred at approximately 1200 degrees C and ended at 1400 degrees C. The synthesized nanopowders had mesoporous structure with a specific surface area of 150 m2/g, and TiC nanowhiskers heterogeneously nucleated and grew in a soaking time of 3 h. The free carbon content in the synthesized product under 3 h soaking time was less than 1%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Thermodynamics
Heping Li, Daolun Liang, Jianzhong Liu
Summary: Nano-carbides, especially nTiC, show promising potential as accelerants for boron oxidation in solid propellants, by reducing the initial oxidation temperature and increasing heat release. The action mechanisms of nano-carbides are complex, involving oxidation, gaseous product formation, boride generation, and oxide catalysis, which may lead to improved performance of B-based solid propellants in the future.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Chemical
Hendrix Abdul Ajiz, Kenny Santoso, Jason Aditya Purnama, Widiyastuti Widiyastuti, Tantular Nurtono, Heru Setyawan
Summary: The photoluminescence characteristics of ZnO/SiO2 composite particles were investigated by using the consecutive sol-gel spray drying method. The addition of sodium lauryl sulfate (SLS) as a particle morphology control agent could reduce the particle diameter and increase the particle uniformity. Increasing the excitation wavelength and adding silica to the composite particles could enhance the photoluminescence emission intensity without causing a shift in the emission peaks.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
J. G. Ke, R. Liu, Z. M. Xie, M. Sun, K. Jing, G. F. Zhang, X. Cheng, X. Q. Liu, X. P. Wang, X. B. Wu, C. S. Liu, Q. F. Fang
Summary: In this study, tungsten carbide (WC) nanopowders with an average size of about 10 nm were synthesized using a sol-gel preparation, reduction and carbonization process, and high-energy ball milling. This method provides a facile and cost-effective way to prepare nanoscale WC powders suitable for industrial production.
Article
Materials Science, Ceramics
Suna Avcioglu, Semra Kurama
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Ceramics
Suna Avcioglu, Zeynep Naz Ates, Erol Kam, Cengiz Kaya, Figen Kaya
Summary: In this study, B4C-BN nanocomposite powders were successfully synthesized using the sol-gel method, and the effects of polyelectrolyte on phase content, particle size, and morphology were investigated. The results showed that the addition of ammonium polycarboxylate as a dispersing agent and a nitrogen source could control the dimensions, crystallinity, and B4C to BN phase ratio of the synthesized powders.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Suna Avcioglu, Figen Kaya, Cengiz Kaya
Summary: A novel non-catalytic sol-gel route was used to synthesize nano/micro boron carbide fibers by manipulating the growth kinetics of boron carbide particles through in-situ decoration with boric acid crystals during thermal decomposition. This approach successfully produced highly crystalline boron carbide particles and various morphologies of boron carbide, such as rhomboid-plate, nanobelt, and fiber. By tailoring the structure of the preceramic precursor, the formation of boron carbide fiber was increased while polyhedral-equiaxed particles were decreased in the final products.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Celal Avcoglu, Suna Avcioglu, Maged F. Bekheet, Aleksander Gurlo
Summary: This study provides a comprehensive summary of the progress in solar water splitting using niobium-based photocatalysts and discusses their competitiveness in terms of photocatalytic water splitting activity. The niobium-based semiconductor photocatalysts are categorized into seven groups based on their crystal structures and chemical formulae. The emphasis is on the structure-activity relationship, significant progress, and current strategic trends. Additionally, scientific challenges and promising avenues towards efficient water splitting based on niobium-based photocatalysts are identified and discussed.
MATERIALS TODAY ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Suna Avcioglu, Pinar Uyan, Onur Yontar, Sinem cevik
Summary: In this study, AlN-PVA composite coatings were fabricated using electrospray deposition technique for electronic applications. The results showed that increasing the deposition time reduced the surface roughness and improved the thermal effusivity of the coatings.
Article
Chemistry, Physical
Suna Avcioglu
Summary: In this study, a composite powder containing boron carbide, dysprosium tetraboride, dysprosium oxoborate, and dysprosium boron carbide was synthesized and used as a reinforcement material in the production of a novel low-density polyethylene (LDPE) matrix composite. The composite exhibited good chemical, mechanical, thermal properties, and neutron radiation shielding performance, making it a promising material for safety applications requiring protection against both neutron and gamma radiations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Green & Sustainable Science & Technology
Arife Kubra Yontar, Suna Avcioglu, Sinem Cevik
Summary: The use of plant extract modified nanocomposite films is significant for sustainable and eco-friendly materials in environmental remediation. The modification with plant extracts can enhance the hardness and water absorption capacity of nanocomposite films, and significantly improve the photocatalytic activity.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Suna Avcioglu, Merve Buldu-Akturk, Emre Erdem, Figen Kaya, Cengiz Kaya
Summary: Boron carbide powders with nano/micro fibers or polyhedral-equiaxed particles were synthesized using the sol-gel technique. The thermal decomposition duration of the precursors determined the morphology of the synthesized powders. By adjusting the duration, the morphology was successfully tuned from polyhedral-equiaxed to nano/micro fibers. The electrochemical performance of the boron carbide electrodes was significantly influenced by the particle morphology, with the best performance observed in the synergistic effects of polyhedral-equiaxed and nano/micro fiber morphologies.
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
Nanoscience & Nanotechnology
Thondaiman Pugalenthiyar, Chellan Justin Raj, Ramu Manikandan, Dennyson Savariraj Antonysamy, Joaquim Puigdollers, Cengiz Kaya, Byung Chul Kim
Summary: This study presents a hierarchical cobalt carbonate hydroxide (CCH) nanostructure modified with tin oxide, forming unique two-dimensional interlayered heterostructures. The modified electrode exhibits high conductivity and electroactive sites, leading to enhanced energy storage performance. The hybrid supercapacitor (HSC) constructed using the modified CCH electrode shows high specific capacitance, energy, and power, with excellent capacitance retention even after a large number of cycles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Celal Avcioglu, Suna Avcioglu
Summary: This study examines the ability of transition metal borides to attenuate both photon and particle radiation and evaluates their shielding characteristics using computational methods. The results show that transition metal borides with a high atomic number exhibit excellent gamma-ray shielding performance and certain compounds also have good neutron attenuation capabilities.
Article
Green & Sustainable Science & Technology
Pugalenthiyar Thondaiman, Chellan Justin Raj, Ramu Manikandan, Voz Cristobal, Cengiz Kaya, Byung Chul Kim
Summary: The synergism of heteroatom-doped carbon polyhedral with mixed-metal networks offers a myriad of electroactive sites that aid in excellent capacitive performance. A thiourea functionalized bimetallic ZIF-67 polyhedral was synthesized as a sacrificial template, facilitating the construction of a superior N/S-carbon matrix with a Co-Ni-P (CNS/CNP) architecture. The resulting material exhibited remarkable attributes, including a high specific capacitance and excellent cycling stability.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Energy & Fuels
Amol M. Kale, Madan R. Biradar, Won-Je Cho, Cengiz Kaya, Sheshanath V. Bhosale, Sidhanath V. Bhosale, Byung Chul Kim
Summary: Perylene diimide (PDI)-based MOFs are promising options for energy storage with their unique advantages. This study successfully incorporated PDI-L-Dopa into the Ni-MOF architecture, resulting in a hierarchical flower-like microsphere structure with better electron transport, conductivity, and wettability. The Ni-MOF-24 h electrode demonstrated beneficial electrochemical efficiency, and the symmetric supercapacitor (SSC) fabricated with Ni-MOF-24 h electrodes displayed high energy density and extraordinary cyclic stability.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Multidisciplinary
Suna Avcioglu, Semra Kurama, Erhan Ayas, Kubra Gurcan
JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI
(2020)
