Article
Construction & Building Technology
Vadim Potapov, Yuriy Efimenko, Roman Fediuk, Denis Gorev, Andrey Kozin, Yury Liseitsev
Summary: The modification of cement concretes with silica-containing additives can significantly improve their physical and mechanical properties. SiO2 sols and nanopowders obtained by a technological method were used as modifiers, affecting the strength and density of the cement material. Specific equations can approximate the relationship between SiO2 dosage and the increment in compressive strength, flexural strength, and density.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Materials Science, Ceramics
Rujing Xue, Guoliang Liu, Fujuan Liu
Summary: This paper proposes a simple method for preparing aerogel insulation materials, and successfully obtains SiO2/PI/AF (aramid fiber) aerogel composite fabrics. These composite fabrics exhibit excellent performance and can effectively block heat transfer, providing a novel method for the structural design of thermal insulation clothing.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Natalia Pawlik, Barbara Szpikowska-Sroka, Tomasz Goryczka, Ewa Pietrasik, Wojciech A. Pisarski
Summary: The study successfully synthesized oxyfluoride glass-ceramics with BaF2 nanocrystals co-doped with Tb3+ and Eu3+ ions, which show potential applications in optoelectronic devices. The materials exhibited visible light emission based on electronic transitions of Tb3+ and Eu3+, with the co-doping of Eu3+ leading to shortened decay times and enhanced Tb3+/Eu3+ energy transfer efficiencies. These findings suggest that the materials could be advantageous for laser technologies, spectral converters, and three-dimensional displays.
Article
Materials Science, Ceramics
Esmaeil Mohebbi, Saeed Hasani, Mohsen Nouri-Khezrabad, Abolfazl Ziarati
Summary: The study aims to enhance the properties of M-type barium hexaferrite nano-particles through the addition of natural agent agarose. Various analyses were conducted to characterize the synthesized samples. The presence of agarose improved the distribution of metal cations, reduced particle size, prevented agglomeration, increased coercivity and remanence magnetization, and resulted in an increased maximum energy product.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Yubing Yang, Yuxiang Yang, Chaoying Ni
Summary: Nanosilica particles were prepared from self-made silica gel using complexation precipitation method under the protection of citric acid. The effects of ethyl acetate, citric acid, reaction temperature, and reaction time on the particle size of nanosilica were studied. The optimal process parameters were determined and the products were characterized by various analysis techniques.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Materials Science, Ceramics
Yanan Gao, Juncheng Liu, Beiping Dong
Summary: The Sb-doped SnO2-SiO2 film shows reduced crystallinity with Sb doping, exhibiting M-shaped changes in lattice parameters with increasing Sb concentration. Nanoparticle size decreases and then increases with Sb doping levels above 6 mol%. Additionally, the transmittance of the glass substrate coated with this film decreases, while resistance and dust removal performance exhibit complex changes with varying Sb concentrations. At 12 mol% Sb doping, the film exhibits minimal resistance and a 64% dust removal performance.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Fei Gao, Xinyu Zhao, Jinglin Liu
Summary: Europium trivalent ion (Eu3+)-doped silica nanowires were prepared and the positioning of Eu3+ in the silicon dioxide nanowire matrix was investigated. The results indicate that Eu3+ was successfully doped into amorphous silica and exhibited high photoluminescent emission in the silica matrix.
Article
Materials Science, Ceramics
Long Chen, Zhiyuan Li, Penghui Zhang, Peijing Tian, Jian Yuan, Weihong Zheng
Summary: This paper analyzed the effects of polyacrylic acid (PAA) content on SiO2 films prepared by the sol-gel method using TEM, DLS, XRD, IR, SEM, and the transmission spectrum. The sol containing hollow spherical micelles can be prepared from tetraethyl orthosilicate (TEOS) and PAA as water-soluble polymer by improved Stober and template method. With the increase of PAA content, the particle size of hollow spherical silica colloidal particles increases and the quantity decreases. The transmittance of the glass increases with the increase of withdrawal speed, and the sample's transmittance decreases first and then increases with the increase of PAA content from 0.1g to 0.6g.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Z. Hayati, B. Hoomehr, F. Khalesi, K. Raeissi
Summary: Titanium dioxide-silica composite nanoparticles were synthesized using a verified Stober sol-gel method. The resulting nanoparticles consisted of titanium dioxide cores surrounded by ultrafine silica particles, forming a thin shell. These nanoparticles were deposited on a stainless steel substrate via electrophoretic deposition to enhance its biological response. The presence of a silica shell increased the surface roughness, eliminated cracks, and improved the adhesion and barrier performance of the coating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Yuanbing Li, Jingfei Liu, Bo Yin, Shujing Li, Pan Chen, Zhen Cai
Summary: The sol-gel method was used to prepare fibrous/nano-Al2O3 insulation composites for performance characterization. The composites exhibited high porosities and low thermal conductivities. The introduction of nano-Al2O3 resulted in a well-distributed aperture hierarchy and promoted multidirectional heat transfer paths. This research has potential applications in heat preservation and energy-saving.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Natalia Pawlik, Tomasz Goryczka, Ewa Pietrasik, Joanna Smiarowska, Wojciech A. A. Pisarski
Summary: Dy3+-doped silicate xerogels were synthesized and further processed into SiO2-LaF3:Dy3+ nano-glass-ceramic materials. The optical results showed that the emission intensities and Y/B ratios of blue, yellow, and red emissions are dependent on the nature of fabricated materials and the La3+:Dy3+ molar ratios. Longer lifetimes were observed for xerogels while concentration quenching effect and shorter lifetimes were observed for SiO2-LaF3:Dy3+ nano-glass-ceramics, suggesting the partial entry of Dy3+ ions into the LaF3 phase.
Article
Acoustics
Youwen Tian, Wei Luo, Yedan Wang, Yun Yu, Wanzhen Huang, Haodong Tang, Yifan Zheng, Zongjian Liu
Summary: The ultrasound-assisted, interface-confined sol-gel method proposed in this study allows for fast encapsulation of metal microparticles in SiO2, resulting in a continuous and uniform SiO2 layer. The key steps for success include ensuring the liquid films stay attached to the particle surfaces, using proper amounts of alcohol and water, and selecting an appropriate ultrasonic power level.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Mahsa Khoshnam, Hamidreza Salimijazi
Summary: In this study, a novel magnetic-photocatalytic core/double-layer-shell of Fe3O4/SiO2/a-Fe2O3 particles was synthesized via a developed sol-gel method, with each stage characterized using XRD, FTIR, and VSM. The particles exhibited an average size of 250 nm and showed high photo-degradation efficiency towards dye contaminations in a short period of time.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Ceramics
H. A. Wahab, D. Atta, O. El-Sayed, I. K. Battisha
Summary: Smart nano-composites Phospho-silicate (SiO2-P2O5) doped with different mol% of Er3+ ions were synthesized by Sol-Gel technique, and then annealed at 850 degrees C. X-ray diffraction patterns revealed increased crystallite sizes as the Er3+ ion concentration increased. TEM and FESEM characterization showed the morphology and surface morphology of the prepared samples. Raman analysis indicated active Raman bands corresponding to silicate and phosphate, with enveloped vibrations of Er2O3. The optical studies demonstrated increased refractive index with higher Er3+ ion concentration, and photoluminescence exhibited emission at two different wavelengths.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Muhammad Ghufran, David Huitink
Summary: Paraffin- and titania-based nano-encapsulated phase change materials (NePCMs) were synthesized by the sol-gel process to improve thermal and phase change performance. Nine different samples of NePCMs were prepared with varying core/shell mass ratios, and their effect on thermal performance was investigated. Characterization techniques confirmed the successful encapsulation of paraffin in the titania shell. The NePCMs with a 52.33% encapsulation ratio exhibited the maximum effective melting and solidification latent heat. The thermal properties of the NePCMs remained stable even after 100 thermal cycles, and their thermal stability was evaluated using a thermogravimetric analyzer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Editorial Material
Materials Science, Multidisciplinary
Wengui Li, Maria Konsta-Gdoutos, Xianming Shi, Konstantin Sobolev, Surendra P. Shah
FRONTIERS IN MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hua Liu, Aparna Deshmukh, Nathan Salowitz, Jian Zhao, Konstantin Sobolev
Summary: This paper reports on the piezoresistive response of fiber-reinforced cement mortar with graphene nano-platelets. By adding a small quantity of nano-sized conductive particles of graphene, the conventional portland cement-based composite material is transformed into a semiconductive stress-sensing material. The experimental results and simulations suggest that the electrical resistivity of the graphene-cement composite material can be used for structural health monitoring and damage detection.
FRONTIERS IN MATERIALS
(2022)
Article
Materials Science, Ceramics
M. R. Alfaro Cruz, L. F. Garay-Rodriguez, Leticia M. Torres-Martinez
Summary: Thin films of ZnO nanorods were successfully grown by chemical bath deposition over a ZnO seed layer deposited by the sol-gel method. The ZnO nanorod films exhibited higher photocatalytic activity and hydrogen production compared to ZnO seed layer films, due to their larger specific surface areas and roughness.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Applied
Luis F. Garay-Rodriguez, Leticia M. Torres-Martinez, Hisao Yoshida, Isaias Juarez-Ramirez
Summary: Powder samples of Na2Ti3O7 were prepared and deposited with Co3O4 and CuO by wet impregnation, which showed improved photocatalytic activity. The concentration of CuOx had a significant influence on the product selectivity, with smaller amounts promoting H2 formation and larger amounts promoting CH4 formation. The Na2Ti3O7 phase transformed slowly under illumination, while the CuO cocatalyst was reduced, causing a change in the reaction performance.
TOPICS IN CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Konstantin Sobolev, Rani Pradoto, Ismael Flores-Vivian, Marina Kozhukhova, Irina Zhernovskaya
Summary: Blended cement performance can be improved by mechano-chemically activating fly ash, resulting in enhanced early strength of mortars and the possibility of replacing portland cement with industrial by-products.
Article
Construction & Building Technology
Chen Liang, Piqi Zhao, Lu Liu, Shuo Wang, Shoude Wang, Konstantin Sobolev, Lingchao Lu
Summary: The study successfully developed a hydrophobic emulsion for cement-based materials, which significantly improves the durability and exhibits water repellent properties and corrosion resistance.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Physical
Carlos E. Caballero-Guerecaa, M. R. Alfaro Cruza, E. Luevano-Hipolitoa, Leticia M. Torres-Martinez
Summary: Highly transparent ZnO films were successfully deposited on glass substrates using the sol-gel technique. The quality of the films was influenced by the concentration of zinc in the precursor solution and the annealing temperature. The films showed good crystallinity and preferential orientation, and exhibited high transmittance of over 90%.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Luis F. Garay-Rodriguez, Edith Luevano-Hipolito, Leticia M. Torres-Martinez
Summary: This work focuses on synthesizing ZnO using natural and food wastes as biotemplates in order to create an artificial leaf for converting CO2 into renewable formic acid under visible light. Different morphologies of ZnO were obtained by using biotemplates such as pea shells, jalapeno stems, egg membranes, and shrub leaves to enhance light harvesting. The results showed that formic acid was the main product, with the highest yield achieved using egg membranes as the template. The stability of the catalyst over time was also remarkable.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Multidisciplinary Sciences
Filip Zemajtis, Abul Borkot Md Rafiqul Hasan, Okan Yetik, Pavel Trtik, Krishna M. Pillai, Konstantin Sobolev
Summary: This paper reports on the transformation of TiO2 nanoparticles doped zinc phosphate coating systems from superhydrophilic to superhydrophobic with the application of a hydrophobic agent. The effectiveness of the coatings was evaluated using high-resolution neutron imaging, SEM, CLSM, and XRD techniques, and the water ingress mechanisms of different coating specimens were revealed. The research results showed that a two-layer superhydrophobic system could create effective water barriers with a contact angle of 152° and remained effective even after surface damage.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Viktor Alekseevich Kukartsev, Alina Igorevna Trunova, Vladislav Viktorovich Kukartsev, Vadim Sergeevich Tynchenko, Sergei Olegovich Kurashkin, Yadviga Aleksandrovna Tynchenko, Ismael Flores Vivian, Kirill Aleksandrovich Bashmur
Summary: This study investigated the properties of quartzite and analyzed the proposed variants for changing the composition of the acid lining used at temperatures of 1550-1600°C. After temperature treatment and sintering of raw quartzite, it was possible to operate the lining at temperatures above 1450°C. An electrocorundum of two fractions was used as an additive to the traditional composition of the acid lining. The industrial testing of a new liner composition for the smelting of synthetic cast iron showed positive results.
Article
Chemistry, Multidisciplinary
Luis F. Garay-Rodriguez, Luz I. Ibarra-Rodriguez, Leticia M. Torres-Martinez, I. Juarez-Ramirez
Summary: A solid solution with the formula CaWxMo1-xO4 (x = 0-1) was synthesized using a microwave-assisted hydrothermal method, and the effect of W6+ concentration on physicochemical properties was investigated. The samples were characterized to analyze their structural, morphological, optical, and electrochemical properties, confirming the formation of the solid solution and the changes caused by W/Mo compositions. The samples grew in different morphologies, slightly reducing their bandgap. All solid solution compositions exhibited activity in simultaneous photocatalytic water splitting and carbon dioxide reduction reactions under UV irradiation without a cocatalyst or sacrificial agent. Various products were evolved, with carbon monoxide being the most abundant product. The sample with the formula CaW0.8Mo0.2O4 achieved the largest amount of carbon monoxide (6.7 µmol), attributed to the larger distortion in the cell due to higher W6+ concentrations.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Abul Borkot Md Rafiqul Hasan, Krishna M. Pillai, Filip Zemajtis, Konstantin Sobolev
Summary: This study models the spontaneous imbibition of water into ceramic tile using the Richards equation and validates the simulation results through experiments and analytical solutions. It provides insights into moisture migration in porous ceramic materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Luis A. Alfonso-Herrera, Jose M. Rivera-Villanueva, Mario Sanchez-Vazquez, Daniel Gonzalez-Araiza, Leticia M. Torres-Martinez, J. Manuel Mora-Hernandez
Summary: This work investigates the influence of functional group coordination on the (photo)electrocatalytic properties of cobalt-based MOFs. The results reveal that the coordination of functional groups affects the crystallinity, optical properties, and charge transport properties of the materials. Specifically, Co-MOF2 demonstrates enhanced light-harvesting and photocatalytic activity due to its narrower bandgap, while Co-MOF1 exhibits better charge transport properties and higher stability attributed to its higher crystallinity. This study is of great importance for the development of advanced (photo)electrocatalytic oxidation processes.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Multidisciplinary
Luis Lopez-Pavon, Daniel Dagnino-Acosta, Enrique Lopez-Cuellar, Frank Melendez-Anzures, Diana Zarate-Trivino, Maria Barron-Gonzalez, Ivan Moreno-Cortez, Hee Young Kim, Shuichi Miyazaki
Summary: The study explored the potential application of titanium nanotubes in preventing bacterial infections in medical devices. The developed nanostructures in Ti-24Zr-10Nb-2Sn showed bacteriostatic and bactericidal effects, indicating their effectiveness in controlled drug release for preventing postoperative infections.
