Article
Chemistry, Physical
O. Secundino-Sanchez, J. G. Mendoza-Alvarez, J. Diaz-Reyes, J. F. Sanchez-Ramirez, O. Zaca-Moran, J. L. Herrera-Perez
Summary: In this study, TiO2 nanofibers with controlled morphology and crystalline phase were synthesized using the electrospinning technique. The diameter and formation of the fibers were controlled by varying the air gap. Thermal treatment was used to control the crystalline phase of the TiO2 nanofibers. Characterization techniques such as SEM, TEM, EDS, FTIR, Raman scattering, and X-ray diffraction were used to investigate the structural and optical changes of the TiO2 nanofibers, as well as the influence of the precursor on the fiber properties.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
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, 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)
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
Chemistry, Physical
Sekhar C. Ray, Dilip Kumar Mishra, Atala Bihari Panda, H. T. Wang, Sriparna Bhattacharya (Mitra), W. F. Pong
Summary: TiO2 thin films were prepared using the reactive magnetron cosputtering technique, and the modification in the electronic structure with the increase of annealing temperatures was studied. The results showed that the annealing temperature had a significant impact on the structure and bonding of the TiO2 thin films, leading to changes in the electronic properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Daiki Fukuhara, Moses Tuhafeni Joseph, Tarik Loumissi, Chao Zhang, Takaomi Itoi, Hongwei Zhang, Yasuo Izumi
Summary: The study found that the oxidation reaction of ethanol is mainly influenced by the temperature of Ag sites and the lighting conditions. Under UV light, ethanol oxidation to acetaldehyde and O-2 activation for oxidation to CO2 and H2O mainly occur, while under visible light, C-C bond cleavage to produce CO2 and CH4 and complete oxidation to CO2 and H2O combined with O-2-derived species transferred from the TiO2 surface mainly occur on Ag-0 nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Toshihiro Ishikawa, Katsuya Niidome
Summary: Due to the formation of a surface passive film, titanium metal exhibits good corrosion resistance. However, direct oxidation of titanium metal only leads to the formation of rutile TiO2. Previous studies have found that anatase TiO2 layers easily peel off when used in flowing water. In this study, a simple process for obtaining an anatase TiO2 coating layer strongly bonded to the titanium metal surface is described.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Chemistry, Applied
Youssef Doubi, Bouchaib Hartiti, Maryam Siadat, Hicham Labrim, Salah Fadili, Mounia Tahri, Amine Belafhaili, Philippe Thevenin
Summary: Our study focuses on the elaboration of TiO2 thin films using spray pyrolysis technique with different titanium precursors. Characterization techniques including XRD, Raman spectroscopy, SEM, and UV-visible spectroscopy were used to analyze the thin films. The results showed that changing the precursor from titanium chloride to titanium propoxide had a significant impact on the structural, surface, and optical properties of TiO2 thin layers. The experimental and theoretical results obtained in this study are comparable or even superior to recently published research findings.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Saif M. H. Qaid, Hamid M. Ghaithan, Huda S. Bawazir, Abrar F. Bin Ajaj, Khulod K. AlHarbi, Abdullah S. Aldwayyan
Summary: This study aims to synthesize various TiO2 nanocrystals, including nanosheets, nanorods, and nanoparticles, using a rapid hydrothermal method. The synthesized TiO2 nanocrystals exhibit high purity and exposed high-energy facets, resulting in high reactivity and large surface area. The {001} facets dominate in the nanosheets and nanorods, accounting for approximately 80% and 85% of the outer surface area, respectively.
Article
Materials Science, Multidisciplinary
Elchin M. Huseynov, Efsane A. Huseynova
Summary: The band structure of nanocrystalline anatase (TiO2) particles was investigated using FTIR spectroscopy before and after neutron irradiation. The changes in peak values and the appearance of new peaks in the infrared absorption spectra were explained, revealing the structural changes on the nanoparticle surface and the effects of neutron irradiation on the surface activity and crystalline structure of the nanocrystals.
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
Crystallography
Vera Serga, Regina Burve, Aija Krumina, Marina Romanova, Eugene A. Kotomin, Anatoli Popov
Summary: This research demonstrates the feasibility of using the extraction-pyrolytic method (EPM) to produce nanocrystalline TiO2 powders, showing that EPM allows for the fabrication of both single-phase and two-phase impurity-free nanocrystalline TiO2 powders. The results could serve as a basis for further development of EPM for cost-effective and simple production of nanocrystalline TiO2-based materials.
Article
Materials Science, Ceramics
Jin Liu, Weiguang Yang
Summary: Anatase TiO2 samples with three different morphologies were prepared using the solvothermal method, and their properties were modified by electron beam irradiation and nitrogen doping.
CERAMICS INTERNATIONAL
(2022)
Review
Chemistry, Multidisciplinary
Damien Dambournet
Summary: This study explores the recent progress in solution-based synthesis of anatase, with a focus on the use of fluoride precursors to stabilize crystals with tailored facets. The findings highlight the influence of stabilized defect structures on the reactivity of titanium ions and the ion-intercalation properties, particularly the selective intercalation of polyvalent ions.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Ghulam Asghar, Xue Dong, Sudong Chae, Shahid Saqlain, Seungbae Oh, Kyung Hwan Choi, Jiho Jeon, Chaeheon Woo, Tae Yeong Kim, Jungyoon Ahn, Hyung-Suk Oh, Jae-Hyuk Park, Hak Ki Yu, Jae-Young Choi
Summary: Ultraviolet radiation poses serious health risks, leading to an urgent need for more effective and safer UV filters. In this study, titanium dioxide nanoparticles were successfully embedded in silica microspheres, resulting in a new material with excellent UV protection abilities.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.