Article
Engineering, Chemical
Sofiatun Anisah, Masakoto Kanezashi, Hiroki Nagasawa, Toshinori Tsuru
Summary: The TiO2-ZrO2 nanofiltration membranes with Ti/Zr molar ratios of 5/5, 3/7, 1/9, and 0/10 showed sufficient stability in both strong acid and strong alkaline solutions, while membranes with higher titanium content exhibited poorer stability under corrosive conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Jingwei Zhao, Zhonghua Yao, Zhijian Wang, Ning Zhang, Hua Hao, Minghe Cao, Hanxing Liu
Summary: By employing microstructural engineering, an optimized lead-free Zr-modified BiMg0.5Zr0.04Tix-0.04O3 composition was developed to enhance energy storage behavior, achieving superior energy properties and high efficiency. Rapid annealing and excess Ti source doping effectively increased polarization and dielectric breakdown levels.
CERAMICS INTERNATIONAL
(2021)
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
Materials Science, Ceramics
K. Hari Raj, S. Gnanavel, S. Ramalingam
Summary: Orthopedic implants fabricated with stainless steel and titanium alloys often require removal and replacement. To address this issue, a biodegradable implant made of PLA was introduced, and its mechanical and biological properties were improved by surface modification with nanocomposites. The feasibility of using this implant in biomedical applications was demonstrated through in vitro studies.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Lawrence Munguti, Francis Dejene
Summary: ZnO-TiO2 nanostructured composites were synthesized using varying Zn:Ti molar ratios, with the photocatalytic performance strongly dependent on these ratios. The composites exhibited higher porosity and lower bandgap energies, suggesting a good synergistic effect between ZnO and TiO2.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Lidija Curkovic, Helena Otmacic Curkovic, Irena Zmak, Mihone Kerolli Mustafa, Ivana Gabelica
Summary: In this study, a single-layer TiO2-ZrO2 thin film was deposited on stainless steel using the sol-gel process to enhance corrosion resistance. The film was analyzed for morphology and phase composition using SEM and XRD, and its thickness was determined by GD-OES. The corrosion behavior of the coated stainless steel was evaluated in different chloride media, showing significant improvement in corrosion properties with the sol-gel process and calcination at 400 degrees C.
Article
Materials Science, Multidisciplinary
Yuanting Wu, Senmao Ren, Xiaojing Chang, Xinmeng Zhang
Summary: This study demonstrated the preparation of TiO2-ZrO2-SiO2 nano-powders to enhance the synergistic effect of adsorption and degradation in photocatalytic materials. The TiO2-ZrO2-SiO2 system showed excellent photocatalytic performance and adsorption ability, with SiO2 acting as an adsorbent and TiO2-ZrO2 acting synergistically as a photocatalyst. The enhanced photocatalytic ability was attributed to factors such as accelerated mass transfer, narrowed bandgap, and effective charge separation rate. The synergy effect between adsorption and photocatalysis was evaluated using the synergy factor beta, showing remarkable synergistic effect in the TiO2-ZrO2-SiO2 compound system.
Article
Environmental Sciences
Xiumei Tao, Lei Zhu, Xun Wang, Xueqi Chen, Xian Liu
Summary: In this study, Y-ZrO2-TiO2 photocatalyst was prepared by sol-gel method, and the effects of various factors on its photocatalytic performance were investigated. The results showed that the addition of Zr and Y elements improved the photocatalytic performance of TiO2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Ceramics
Rene M. Guillen, Rut Benavente, Maria D. Salvador, Felipe L. Penaranda, Paloma Recio, Rodrigo Moreno, Amparo Borrell
Summary: Microwave sintering of 3Y-TZP/TiO2 materials at low temperatures (1200-1300 degrees C) results in dense, coarse-grained, and hard material with significantly reduced thermal expansion coefficient. Compared to conventional sintering methods, microwave sintering shows higher efficiency in energy consumption.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
B. Salem, O. M. Hemeda, A. M. A. Henaish, N. Y. Mostafa, M. Mostafa
Summary: The objective of this study is to synthesize a nanomagnetic material with low Tc and small particle size for converting magnetic loss into heat energy. A series of Cu0.4Zn0.6+yZryFe2-2yO4 nanoparticles were synthesized, and their properties were analyzed. The results show that the materials exhibit soft magnetic properties at low Zr content and behave as superparamagnetic when the Zr content is high. The material also shows potential for use in magnetic temperature transducer (MTT) devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
Sonali A. Korde, Premkumar B. Thombre, Sudarshan S. Dipake, Jaiprakash N. Sangshetti, Anjali S. Rajbhoj, Suresh T. Gaikwad
Summary: A green method using neem gum extract has been employed for the synthesis of monometallic and bimetallic metal oxide nanoparticles of titanium and zirconium. The synthesized nanoparticles were characterized and evaluated for their antimicrobial activity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Amid Shakeri, Mohammad Reza Golobostanfard, Hossein Abdizadeh
Summary: The sol-gel dip coating deposition method was used to fabricate multi-stacked hard/soft piezoelectric lead zirconate titanate (PZT) films with near stoichiometry composition and high quality crack-free surfaces. These films exhibited significantly enhanced polarization, high coercive field, and square shaped polarization-electric field loops, achieving excellent performance in terms of remanent polarization and coercive field. The intriguing properties of hard/soft composite are attributed to the polarization interaction of composite layers and diffusion of ions through the layers.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Irina Stambolova, Daniela Stoyanova, Maria Shipochka, Nelly Boshkova, Alexander Eliyas, Silviya Simeonova, Nikolay Grozev, Nikolai Boshkov
Summary: ZrO2-TiO2 coatings with amorphous structure were prepared using the sol-gel method, and their protective ability in corrosive medium with chloride ions was investigated. The coatings showed good anticorrosion performance, with structural and surface parameters playing a crucial role in their effectiveness.
Article
Materials Science, Ceramics
Ning Duan, Xiangtai Zhang, Chenglong Lu, Yinfeng Zhang, Chongrui Li, Jiangmin Xiong
Summary: By studying the rheological properties of sol and gel film, a high flux Al2O3 nanofiltration membrane was successfully prepared, which has excellent nanofiltration performance.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Biomedical
Seyed Yahya Rahnamaee, Shahab Ahmadi Seyedkhani, Aylar Eslami Saed, Sayed Khatiboleslam Sadrnezhaad, Ashkan Seza
Summary: This study investigated the effects of different bioinspired coatings on titanium alloy surfaces to address common issues in hard-tissue implant failure. The results showed that these coatings could enhance the adhesion strength between coatings and titanium alloy, and exhibited good cell viability and mechanical properties, which could potentially improve the long-term stability of implants.
BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Chemical
Dian Zhang, Masakoto Kanezashi, Toshinori Tsuru, Kazuki Yamamoto, Takahiro Gunji, Yohei Adachi, Joji Ohshita
Summary: Polysilsesquioxane (PSQ) reverse osmosis membranes were prepared by copolymerizing 3-glycidyloxypropyl-POSS (GPOSS) and bis[3-(triethoxysilyl)propyl]amine (BTESPA), exhibiting high NaCl rejection, good heat resistance, and chlorine resistance. The introduction of GPOSS-derived units significantly improved NaCl rejection and liquid permeability, achieving NaCl rejection of approximately 99% and liquid permeability of 5.5 x 10-13 m/s center dot Pa. These PSQ membranes with GPOSS-derived units showed excellent heat resistance up to 100 degrees C and favorable resistance to chlorine, with no obvious performance change observed after exposure to NaOCl aqueous solution (1000 ppm) for 10 h.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Ceramics
Kohei Kajimura, Katsuhiro Horata, Yohei Adachi, Masakoto Kanezashi, Toshinori Tsuru, Joji Ohshita
Summary: Urea-and isocyanurate-containing polysilsesquioxane (PSQ) membranes were prepared and their CO2 separation performance was investigated. The synthesis of urea-containing PSQ membranes on inorganic supports and copolymerization with bis(triethoxysilyl)alkanes (EtO)3Si(CH2)xSi(OEt)3 (x = 1-3) improved the CO2/N2 permselectivity and CO2 permeance. Homopolymerization of isocyanurate-containing precursors yielded membranes with even higher performance, especially the membrane prepared from tris(triethoxysilylpropyl) isocyanurate (TTESPI) showed the highest CO2 permeance and CO2/N-2 permselectivity. The CO2-philicity of urea units played a role in determining membrane performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Risa Takenaka, Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, graphene oxide (GO) was coated on various polymeric porous substrates to prepare composite membranes for water vapor separation. The membranes showed high water permeance and selectivity, with a reproducible and stable performance. The GO composite membranes also maintained their performance at high temperatures, making them useful for water vapor separation applications.
Review
Biochemistry & Molecular Biology
Sulaiman Oladipo Lawal, Masakoto Kanezashi
Summary: This review provides a brief conceptual overview of membranes derived from organic chelating ligands. It classifies the membranes based on their matrix composition. The review emphasizes the importance of organic chelating ligands in the formation of inorganic-organic composites. It explores the different types of organic chelating ligands and their role in microstructural engineering of the membranes.
Article
Nanoscience & Nanotechnology
Hiroki Nagasawa, Takuya Okada, Masakoto Kanezashi, Toshinori Tsuru
Summary: The plasma-induced polymerization of liquid silsesquioxane monomer (BTESE) at the gas-liquid interface was successfully achieved using an atmospheric-pressure plasma jet at room temperature. This resulted in the formation of a thin polysilsesquioxane layer on the surface of a porous support. The confined polymerization at the plasma-liquid interface proved to be advantageous for preparing nanocomposite membranes with a thin selective layer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Wei-Wei Yan, Ufafa Anggarini, Hong-Cun Bai, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: Bis[3-(trimethoxysilyl)propyl] amine (BTPA) membranes doped with different metals (Fe, Ni, and Ag) were tested for the permeation properties of H-2, N-2, and NH3. The metal-coordinated BTPA gels showed excellent NH3 adsorption and desorption capacity due to the coordination between metal and NH3. The Ni-BTPA membrane exhibited the highest NH3 permeance and selectivity among all tested materials.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shun Aoyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: The effects of plasma treatment time on the gas permeation and pervaporation dehydration properties of organosilica membranes were investigated. The study found that increasing plasma modification time resulted in a decrease in pore size, leading to an increased He/N2 permeance ratio. The H2O/EtOH permeance ratio also increased from about 20 to over 1000 as the plasma modification time increased due to changes in pore structure and water adsorption properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Norihiro Moriyama, Kotaro Wakimoto, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, the performance of PFSA membranes in humid gas separation was evaluated at temperatures ranging from 80 to 200 °C under various relative humidity conditions. It was found that PFSA layers with a thickness of 80 nm exhibited high water permeability and water/nitrogen permeance ratio at high temperatures. This study provides insights into the use of PFSA membranes at high temperatures under humid conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Ikram Rana, Hiroki Nagasawa, Toshinori Tsuru, Masakoto Kanezashi
Summary: This study presents a novel approach for the fabrication of highly CO2-permeable membranes by functionalizing tetraethoxysilane (TEOS) membranes with 3-aminopropyltriethoxysilyl (APTES) and trifluoroacetic acid (TFA). The interaction between APTES and TFA enables reversible CO2 adsorption/desorption, leading to increased microporosity and structural variations that enhance molecular sieving and control the CO2-philic sites. This method shows great potential for energy-efficient membrane fabrication.
JOURNAL OF MEMBRANE SCIENCE LETTERS
(2023)
