Article
Chemistry, Physical
Shouzhen Li, Xiaota Cheng, Guangting Han, Yang Si, Yitao Liu, Jianyong Yu, Bin Ding
Summary: Developing ceramic nanofibrous membranes for the thermal insulation layer of firefighting protective clothing is crucial. Previous membranes were brittle and lacked elastic and compressible properties. This study successfully fabricated elastic and compressible Al2O3/ZrO2/La2O3 nanofibrous membranes, which maintained excellent performance in a wide range of temperatures. These membranes have low thermal conductivity and high working temperatures, making them promising for thermal insulation in firefighting protective clothing.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
K. S. Kamyshnaya, T. A. Khabas
Summary: This study describes the synthesis of ceramics using micrometre-sized Al2O3-ZrO2 nanopowder as an oxide base. By adding different crystallisation additives, ceramics with both permeable and complex pore morphologies were formed after sintering, with a total porosity of 51.3% and compressive strength ranging from 17.3-92.3 MPa.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Coatings & Films
F. Khalesi, M. Farhadian, K. Raeissi
Summary: In this work, post-treatment sol-gel methods using acidic and alkaline TEOS solutions were applied to refine the porous network of ZrO2 coating and improve corrosion resistance. The alkaline TEOS solution resulted in the formation of a dense SiO2 interlayer and narrowed pores in the coating, providing the best barrier performance. On the other hand, the acidic TEOS solution mainly formed thin SiO2 layers on the ZrO2 coating surface, leading to poor barrier performance due to electrostatic repulsion forces.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Sun Yong Kwon, In-Ho Jung
Summary: The optimized Gibbs energies of all phases in the Al2O3-ZrO2, CaO-Al2O3-ZrO2, and Al2O3-SiO2-ZrO2 systems were obtained by evaluating and assessing the available thermodynamic and phase diagram data. Key phase diagram experiments were conducted to predict and reproduce the experimental data.
CERAMICS INTERNATIONAL
(2022)
Article
Agricultural Engineering
Luiz Eduardo Campos Filho, Adrielly Csala Steigenberger, Romulo Henrique Batista Martins, Wanley Eduardo Lopes Junior, Higor Rogerio Favarim, Eliria Maria de Jesus Agnolon Pallone, Maria Teresa de Alvarenga Freire, Milena Martelli Tosi, Juliano Fiorelli
Summary: This study evaluated medium density OSB panels manufactured using commercially sourced and laboratory-produced aluminum oxide nanoparticles. The results indicated that commercial aluminum oxide nanoparticles provided better performance in microstructural and qualitative analysis, as well as an increase in physical-mechanical properties.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Nuray Yerli Soylu, Anil Soylu, Dilara Nur Dikmetas, Funda Karbancioglu-Guler, Sadriye Kucukbayrak, Melek Erol Taygun
Summary: TiO2-based ceramic nanofiber membranes were synthesized by combining sol-gel and electrospinning processes. The thermal treatment at different temperatures had a significant effect on the properties of the membranes. The nanofiber membranes calcined at 650 and 750 degrees C showed high photocatalytic and antibacterial activities, making them a promising candidate for wastewater treatment.
Article
Chemistry, Applied
Atheer Al Khudhair, Karim Bouchmella, Radu Dorin Andrei, Ahmad Mehdi, P. Hubert Mutin, Vasile Hulea
Summary: The mixed oxide catalysts of SiO2-Al2O3-NiO with different Si/Al ratio and Ni content were prepared and evaluated in ethylene oligomerization. The study found that Si/Al ratio influenced the materials' texture and acidity, and samples with high Al content exhibited excellent performances. The catalysts compared well with model catalysts prepared by time-consuming multistep procedures from expensive ordered mesoporous silica supports.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Ceramics
Nan Li, Nuoting Yu, Zhongzhou Yi, Di An, Zhipeng Xie
Summary: In this study, stable 12Ce-ZrO2 nanoparticles were successfully prepared using a novel sol-gel-flux method, and were compared with the product synthesized using the traditional sol-gel method. The results showed that the sol-gel-flux method exhibited better sintering ability and more homogeneous microstructure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Hanjun Cho, Deunchan Lee, Suyeon Hong, Heegyeong Kim, Kwanghyeon Jo, Changwook Kim, Ilsun Yoon
Summary: Highly transparent nanocomposite films with adjustable refractive index were fabricated by dispersing SiO2-modified ZrO2 nanoparticles in PDMS. The surface modification of the nanoparticles was controlled by varying the reaction time, and characterized using various techniques. The resulting nanocomposite films exhibited excellent optical transparency and adjustable refractive index.
Article
Engineering, Chemical
Akira Miwano, Takehiro Yonezawa, Noriko Yamauchi, Kouichi Nakashima, Yoshio Kobayashi
Summary: The study suggests a new coating technique for thermistors using zirconia, which shows excellent chemical resistance and electrical insulation properties. Pre-silica coating on the substrate can improve the adhesion of ZrO2 films.
Review
Materials Science, Ceramics
Fabricio Eduardo Bortot Coelho, Giuliana Magnacca, Vittorio Boffa, Victor M. Candelario, Mieke Luiten-Olieman, Wenjing Zhang
Summary: Zirconia (ZrO2) membranes have gained popularity due to their superior chemical resistance and hydrophilicity compared to silica and alumina. They are widely used in various industries for producing drinking water, treating wastewater, and in petrochemical, food, and beverages industries. However, fabricating ZrO2 membranes for advanced filtration and gas separation is still challenging.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Hui Dan, Li Chen, Zhen Li, Xinmiao He, Yi Ding
Summary: Amorphous ZrO2 powders were successfully prepared using a novel hydrothermal-assisted sol-gel method. The obtained powders exhibited features of small and uniform particle size, as well as high purity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Azade Yelten, Yasemin Kenar, Ilven Mutlu, Suat Yilmaz
Summary: In this study, highly porous 17-4PH martensitic stainless steel foams were prepared with a-Al2O3 coating to enhance chemical stability and surface properties. The foams were prepared using the space holder technique and coated with a-Al2O3 through dip-coating and heat treatment. The presence of the coating resulted in a decrease in metal ion release.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Ceramics
Yanhan Fei, Xujie Song, Lanjun Du, Yanchun Wang, Zhiming Du
Summary: This study proposes a method for preparing SiC porous ceramics at lower sintering temperatures using industrial-grade SiC abrasives, and successfully prepares ceramics with macroscopic and microscopic pore structures. This process route reduces production costs and simplifies the production process.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yuanting Wu, Mengyao Guan, Xiaojing Chang, Jinrong Wang, Shuming Xu
Summary: We constructed a homogeneous double-layer TiO2-ZrO2-SiO2 photocatalyst with multi-heterojunction (D-TZS) using a simple sol-gel method, which effectively improves the photocatalytic property. By investigating various factors, we found that D-TZS can degrade Rh B by about 99.6% within 40 minutes and almost completely degrade it within 60 minutes. This is attributed to the homogeneity, multiple heterojunctions, and oxygen vacancies of D-TZS.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Namkyu Lee, Joon-Soo Lim, Juyeong Nam, Hyung Mo Bae, Hyung Hee Cho
Summary: This article introduces durable camouflage materials for infrared waves, which coat the micro-nano structures with polyimide nanofilm. The research findings show that this material performs well in terms of mechanical properties and can maintain its infrared camouflage performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Yue Wang, Minjae Kim, Akendra Singh Chabungbam, Dong-eun Kim, Qingyi Shao, Ioannis Kymissis, Hyung-Ho Park
Summary: This study prepared La2Ti2O7-x thin film by atomic layer deposition on TiN substrate, and confirmed its clockwise forming-less resistive switching behavior. The resistive switching mechanism was achieved by voltage-driven and oxygen vacancy doping-controlled Mott transition.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Sarika B. Dhavale, Vithoba L. Patil, Satyajeet S. Patil, Dipali S. Patil, Rushikesh P. Dhavale, Hyung-Ho Park, Pramod S. Patil
Summary: Three dimensional hierarchical porous carbon was prepared from dry almond leaves (Terminalia catappa) by a two step process. The C-1000 carbon sample showed a surface area of 491.3 m(2) g(-1) and a specific capacitance of 212 F g(-1), while the AC-2 sample exhibited a specific surface area of 988.7 m(2) g(-1) and a specific capacitance of 394 F g(-1), with excellent cycling stability and mechanical flexibility, making it suitable for portable electronics application.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Energy & Fuels
Chaeseon Hong, Minjae Kim, Jin-Gyu Lee, Qingyi Shao, Hong-Sub Lee, Hyung-Ho Park
Summary: Si-ZnO thin-film transistors were fabricated via atomic layer deposition (ALD) and then annealed in oxygen, resulting in improved electrical characteristics and lower power consumption.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Physical
Sung-Jin Jung, Sang-Soon Lim, Byeong-Hyeon Lee, Sung Ok Won, Hyung-Ho Park, Seong Keun Kim, Jin-Sang Kim, Seung-Hyub Baek
Summary: Solid compounds with volatile elements often deviate from stoichiometric composition during thermal processes, leading to varied properties. Understanding the effect of process parameters on element volatility and how physical properties change with altered stoichiometry is crucial.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Hae-Noo-Ree Jung, Haryeong Choi, Sang-Hyun Kim, Wook Ki Jung, Hyung-Ho Park
Summary: This study investigates the effect of surfactants (non-ionic, cationic, or anionic) on alumina aerogels. The findings show that the charge-charge interactions between surfactants and cationic inorganic species in the aluminum precursor influence the pore structure of the aerogels. Controlling the surfactant concentration allows for control over the pore structure of the aerogels.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Review
Chemistry, Multidisciplinary
Puttavva Meti, Qi Wang, D. B. Mahadik, Kyu-Yeon Lee, Young-Dae Gong, Hyung-Ho Park
Summary: Aerogels are highly porous materials prepared using sol-gel chemistry, which possess unique physical and chemical properties. They are potential candidates for diverse applications, such as thermal insulation and environmental remediation. However, the fragility and limited scale-up production hinder their routine use in daily life. Therefore, it is important to develop efficient and cost-effective methods for sustainable aerogel production.
Article
Materials Science, Ceramics
Minjae Kim, Jeong Yun Hwang, Dong-eun Kim, Taehwan Song, Kyu Hyoung Lee, Hyung-Ho Park
Summary: In this study, optimized atomic layer deposition (ALD) process parameters were used to deposit crystalline ZrO2 films. Crystalline characteristics of ZrO2 films were obtained by controlling the deposition temperature. The mixture of tetragonal and monoclinic phases of the ZrO2 films exhibited the highest corrosion resistance properties.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Younghun Kim, Vinayak G. Parale, Taehee Kim, Sang-Hyun Kim, Haryeong Choi, Umakant M. Patil, Kazuyoshi Kanamori, Hyung-Ho Park
Summary: A novel metal coordination-assisted sol-gel method was developed for the synthesis of nanostructures with different architectures. The energy storage capacity was influenced by the composition-derived properties and structure-derived properties, which were controlled by the molar ratio of Zn/Co and the architecture of the nanostructures. The one-dimensional Zn-Co-S aerogel exhibited excellent electrochemical performance as a supercapacitor, with high specific capacitance, high-rate capability, and outstanding cyclic stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Chaeseon Hong, Minjae Kim, Byeong-Min Lim, Sunil Moon, Keonwook Kang, Ioannis Kymissis, Hong-Sub Lee, Hyung-Ho Park
Summary: In this study, cation and anion codoped ZnO thin films were prepared through atomic layer deposition, and the effects of different anion doping concentrations on the film properties were investigated. The codoped ZnO films showed reduced oxygen vacancy due to the codoping effect. However, the electrical and optical characteristics of the films exhibited contrasting tendencies depending on the type of anion element. These differences were attributed to the correlation effects between Si doping, reduced interfacial trap density, and anion doping, oxygen vacancy passivation. The behavior of each anion also varied in terms of charge carrier concentration.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Zhiquan Song, Moon-Ju Kim, Jun-Hee Park, Tae Gyeong Yun, Seong-Ju Hwang, Min-Jung Kang, Hyung-Ho Park, Jae-Chul Pyun
Summary: The thermal properties of SiO2 aerogels made from waterglass and TEOS were studied before and after coating with parylene using thermal and plasma deposition methods. The specific surface area of the aerogels was reduced after thermal deposition of parylene coating, while the reduction was smaller with plasma deposition. The thermal conductivity of the aerogels decreased after plasma deposition, indicating improved thermal insulation. However, the thermal conductivity changed in the opposite direction after thermal deposition. The deposition method of parylene had a significant impact on the thermal properties of the SiO2 aerogels.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Polymer Science
Akshay A. Ransing, Rushikesh P. Dhavale, Vinayak G. Parale, Uzma K. H. Bangi, Haryeong Choi, Wonjun Lee, Jiseung Kim, Qi Wang, Varsha D. Phadtare, Taehee Kim, Wook Ki Jung, Hyung-Ho Park
Summary: In this study, hybrid P(AAm-CO-AAc)-silica aerogels were synthesized using highly thermally stable poly(acrylamide-co-acrylic acid) partial sodium salt as a reinforcing polymer. The hybrid aerogels exhibited a seven-fold enhancement in mechanical strength compared to pristine silica aerogel, while maintaining low thermal conductivity and high porosity. Additionally, the hybrid aerogels showed improved thermal stability and strong covalent bonding. This new synthetic approach has potential as an industrial heat insulation material.
Article
Engineering, Environmental
Roxana Paz, Herlys Viltres, Nishesh Kumar Gupta, Carolina Leyva, Rushikesh P. Dhavale, Hyung-Ho Park, Adolfo Romero-Galarza, Amin Reza Rajabzadeh, Seshasai Srinivasan
Summary: This study introduces the effective sequestration of Eu(III) ions from aqueous solutions using low-cost metal-organic frameworks (MOFs). The MOFs exhibit high Eu adsorption capacity and hydrolytic stability at a wide pH range. The adsorption process is governed by chemical interactions between the carboxylic acid/carboxylate group and Eu(III) ions, and preferential adsorption behavior for trivalent lanthanides is observed. The study also demonstrates the regeneration capabilities of the MOFs, making them suitable for capturing Eu(III) ions from waste solutions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yujin Choi, Hyug Hee Han, Kwang Hyun Oh, Hyung-Ho Park, Seenu Ravi, Youn-Sang Bae
Summary: In this study, phosphite-based porous covalent organic polymers (PCOPs) with numerous aromatic and acidic phosphite sites, large surface areas, and hierarchical pore structures were synthesized and found to efficiently remove sulfur-containing PPCPs from water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Physical
Rushikesh P. Dhavale, Vinayak G. Parale, Haryeong Choi, Taehee Kim, Kyu-Yeon Lee, Varsha D. Phadtare, Hyung-Ho Park
Summary: In this study, epoxy-thiol crosslinked silica aerogels were synthesized using a unique method, resulting in improved mechanical resilience for pollutant adsorption. By adjusting the ratio of catalysts and precursors, aerogels with different characteristics and properties were obtained.
APPLIED SURFACE SCIENCE
(2024)
