Article
Chemistry, Multidisciplinary
Anna Yu Kurenkova, Anastasiya Yu Yakovleva, Andrey A. Saraev, Evgeny Yu Gerasimov, Ekaterina A. Kozlova, Vasily V. Kaichev
Summary: This study proposes titania-based photocatalysts modified with copper compounds for hydrogen evolution and tests their photocatalytic activity. The synthesized photocatalysts are characterized using various methods, and the results show that the heat-treated and copper oxide deposited photocatalysts exhibit high activity under both UV and visible light irradiation.
Article
Nanoscience & Nanotechnology
Khaled Badawy, Kin Liao, Nirpendra Singh
Summary: The thermal degradation and phase transformation of Ti3C2T2 (T = O or OH) in different environments were investigated. Ti3C2(OH)2 is most stable under vacuum and water vapor, and least stable in air. Regardless of surface termination, anatase and rutile TiO2 phases are formed in air, while water vapor disrupts the phase formation.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Min Chen, Jianhua Chen, Chuncheng Chen, Changbin Zhang, Hong He
Summary: The research shows that CuOx-rutile is more suitable for the oxidation of ammonia gas under visible light compared to CuOx-anatase, contrary to previous beliefs. Further analysis revealed that the interaction between CuOx and TiO2 differs significantly in different crystal phases, resulting in distinct directions of charge transfer.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Chemical
Maryam Derakhshani, Mostafa M. Amini
Summary: In this study, a high surface area nanoporous carbon derived from MOF-5 was used as a hard template for the synthesis of TiO2 nanoparticles by nanocasting. The interconnected mesoporous network of the carbon template led to the formation of brookite and anatase TiO2 with highly developed mesoporous and macroporous structures. Furthermore, the fabricated brookite and anatase showed enhanced photocatalytic efficiency in visible light due to increased light harvesting ability and reduced band gap energy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Materials Science, Multidisciplinary
Hussein O. Badr, Francisco Lagunas, Daniel E. Autrey, Jacob Cope, Takayuki Kono, Takeshi Torita, Robert F. Klie, Yong-Jie Hu, Michel W. Barsoum
Summary: We synthesized 1D TiO2-based nanofilaments by reacting Ti-containing precursors with quaternary ammonium hydroxides at near-ambient conditions. The structure was previously believed to be anatase-based, but we now conclude that it is actually a 1D titania lepidocrocite-based structure. The NFs grow along [100] and tend to self-assemble/stack in two directions. The band gap is not affected by the nature of the cations surrounding the NFs.
Article
Materials Science, Ceramics
Xiaoping Wu, Yong Liu
Summary: The transformation of anatase titanium dioxide to rutile form is influenced by factors such as heating temperature, heating time, and particle states. The roles of temperature and time in the anatase-rutile transformation for pigmentary TiO2 production are not clearly understood.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Sabrina Selva, Quentin Bignon, Amandine Raynal, Frantz Martin, Quentin Auzoux, Gilles Renou, Michel Tabarant, Frederic Miserque, Laurence Latu-Romain, Yves Wouters
Summary: The corrosion of titanium alloys in primary water at 300 degrees Celsius resulted in a global weight gain due to oxidation and surface precipitation, with a protective ilmenite layer finally precipitating at the surface of the samples.
Article
Chemistry, Physical
Davina Messou, Vincent Bernardin, Frederic Meunier, Marta Borges Ordono, Atsushi Urakawa, Bruno F. Machado, Vincent Colliere, Regis Philippe, Philippe Serp, Carole Le Berre
Summary: The catalytic performances of TiO2-supported Ni catalysts for the methanation of CO2 are investigated, showing that the crystalline phases of TiO2 significantly affect the activity of Ni. Mixing rutile and anatase TiO2 can increase the reaction rate significantly without direct contact between the two catalysts. The synergy between the two catalysts is attributed to hydrogen spillover mediated by surface or gas-phase species.
JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Chemical
Jacek Fal, Jolanta Sobczak, Ryszard Stagraczynski, Patrice Estelle, Gawel Zyla
Summary: The electrical conductivity of ethylene glycol-based nanofluids containing three types of titanium dioxide nanoparticles was investigated experimentally, and a new theoretical correlation was proposed. The influence of nanoparticle content and phase on the electrical conductivity of ethylene glycol was observed.
Review
Chemistry, Multidisciplinary
Diana Rakhmawaty Eddy, Muhamad Diki Permana, Lintang Kumoro Sakti, Geometry Amal Nur Sheha, Solihudin, Sahrul Hidayat, Takahiro Takei, Nobuhiro Kumada, Iman Rahayu
Summary: This study aims to clarify the differences between titanium dioxide polymorphs and their properties in different photocatalytic applications. Homophase titanium dioxide has disadvantages such as high recombination rates and low adsorption capacity. On the other hand, heterophase titanium dioxide can effectively stimulate electron transfer and exhibit superior photocatalytic performance. Various biphase and triphase polymorphs of titanium dioxide are discussed, and the focus is on the synthesis and application of heterophase titanium dioxide as a photocatalyst.
Article
Materials Science, Coatings & Films
Syeed E. Ahmed, Violet M. Poole, John Igo, Yi Gu, Matthew D. McCluskey
Summary: This paper investigates the laser-induced phase transitions of titanium dioxide thin films. Raman mapping reveals the formation of crystalline microstructures due to laser treatment, and the phase of crystalline regions depends on ambient conditions (vacuum versus air).
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Materials Science, Multidisciplinary
Federica Ceriani, Luca Casanova, Luca Massimini, Andrea Brenna, Marco Ormellese
Summary: This research investigates the influence of two types of particles on the properties of PEO coatings on titanium. The study finds that coatings produced at a specific electrical condition exhibit a thicker and more corrosion-resistant layer, while other treatments affect the structure and performance of the coatings.
Article
Chemistry, Multidisciplinary
Lu Zhang, Xian Luo, Jian-Dong Zhang, Yong-Fu Long, Xin Xue, Ben-Jun Xu
Summary: In this study, Fe-doped TiO2 precursors were prepared and analyzed to investigate the effects of Fe doping on the phase transition of TiO2. Results showed that Fe increased the phase transition temperature from anatase to rutile and accelerated the transformation process. Additionally, the crystal phase transition kinetics of Fe-doped TiO2 was found to follow the JMAK model and was influenced by crystal defects.
Article
Nanoscience & Nanotechnology
Kasidid Yaemsunthorn, Marcin Kobielusz, Wojciech Macyk
Summary: The low-temperature synthesis of TiO2 nanocomposites allows precise tuning of the anatase/rutile ratio. Different phase compositions have varying impacts on water oxidation, hydrogen peroxide reduction, and water reduction reactions, with the A series showing higher activity in oxidation-controlled reactions and the B series facilitating reduction-controlled processes. The design of optimal photocatalysts should consider both intrinsic and extrinsic factors for improved catalytic activity.
ACS APPLIED NANO MATERIALS
(2021)
Article
Anatomy & Morphology
Muhammad Hafeez, Wajid Shamim, Rimsha Ehsan, Zain-ul Abdin, Salah Ud Din, Sirajul Haq, Abdulhameed Khan, Shabnam Shahida, Usman Hameed
Summary: This study synthesized titanium dioxide nanoparticles using Cannabis sativa leaves extract and found that the nanoparticles exhibit higher antimicrobial activity against Gram-negative bacteria compared to Gram-positive bacteria, indicating a potential new approach to combat antimicrobial drug resistance.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
