Article
Chemistry, Physical
Lu He, Dietrich R. T. Zahn, Teresa I. I. Madeira
Summary: Titanium dioxide (TiO2) thin films have photocatalytic properties and can be used for recycling and maintenance. Factors affecting their performance include nanocrystalline size, surface morphology, and phase composition, which need to be better studied and correlated.
Article
Engineering, Multidisciplinary
Ugur Caligulu, Nida Darcan, Haluk Kejanli
Summary: This study investigated the impact of Calcium (Ca) and Manganese (Mn) dopants on the optical and surface properties of Titanium dioxide (TiO2) nanomaterial. The results showed that the doping ratio of Mn affected the morphological properties of TiO2 and increased the optical band gap of the samples. The produced samples have potential applications in transparent conductive electrode applications, optoelectronic devices, and sensor production.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2021)
Article
Chemistry, Physical
Nina Kaneva, Assya Bojinova, Karolina Papazova
Summary: Zinc oxide and titanium dioxide semiconductor photocatalysts have been widely used in water treatment due to their high photocatalytic efficiency. By modifying and co-modifying these catalysts with different metals and nonmetals, researchers have improved their photocatalytic properties. In this study, silver was used as a co-catalyst to surface-modify semiconductor films, resulting in increased photocatalytic efficiency for the degradation of organic contaminants.
Article
Chemistry, Physical
Aniket Balapure, Ramakrishnan Ganesan
Summary: This study compared the structure-sensitive photocatalytic activity of triphasic versus anatase TiO2, synthesized under near-identical conditions. Triphasic titania with a significant proportion of rutile exhibited the highest photocatalytic activity among the different phase compositions. The high photocatalytic activity of triphasic TiO2 was found to stem from the lattice contraction of the anatase phase, contributing additional electron density in the valence band.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Environmental
Kaijing Qu, Lei Huang, Siyu Hu, Chang Liu, Qinyu Yang, Lihong Liu, Kun Li, Zuoping Zhao, Zhenxing Wang
Summary: Ciprofloxacin (CIP) is a widely found antibiotic in various types of wastewater and sediments. It is difficult to decompose and harmful to humans. The development of cheap, environmentally friendly, and efficient biochar materials for removing CIP is practical and applicable.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Alessio Zandona, Aurina Martinez Arias, Mirjam Gutbrod, Gundula Helsch, Alfred P. Weber, Joachim Deubener
Summary: Glass-ceramic nanospheres of molar composition 0.83 SiO2 • 0.17 TiO2 are produced by the sol-gel spray-drying method, followed by controlled heat treatments up to 1200 degrees C. TiO2(B) and anatase nanocrystals are precipitated in the glassy matrix, with crystal sizes increasing over time. The nanospheres exhibit noticeable photocatalytic activity under UV-A irradiation, especially during annealing stages with higher amounts of TiO2(B) and smaller crystals.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Maria T. Colomer, Karent J. Duarte, Angel L. Ortiz, D. Fabio Mercado, Luz M. Ballesteros-Rueda
Summary: Doping of Pr3+ in TiO2 sols leads to reduced dispersion and increased viscosity, with lower doping proportions showing minimal crystal growth and minor transformation upon moderate calcination. Photocatalytic activity is highest in xerogels doped with 0.5 mol% Pr3+ and deteriorates with higher doping levels, while calcination at 500 degrees C decreases photocatalytic efficiency. These observations are attributed to changes in polymorph composition, crystal size, bandgap, and specific surface area with varying dopant content.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
C. Gomez-Polo, S. Larumbe, A. Gil, D. Munoz, L. Rodriguez Fernandez, L. Fernandez Barquin, A. Garcia-Prieto, M. L. Fdez-Gubieda, A. Muela
Summary: The study investigates the effects of Cr and N doping on the properties of TiO2 anatase nanoparticles, including adsorption capacity, photocatalytic performance, and antibacterial response. Doping with Cr and Cr/N enhances adsorption capacity and photocatalytic performance, with Cr-TiO2 nanoparticles exhibiting antibacterial activity under visible light. The differences in electrostatic charge and nanoparticle dispersion are suggested as the main reasons for the varied antibacterial response among the doped nanoparticles.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Jovana Cirkovic, Aleksandar Radojkovic, Danijela Lukovic Golic, Nikola Tasic, Mirta Cizmic, Goran Brankovic, Zorica Brankovic
Summary: This study systematically investigated the photocatalytic activity of single-phase BiFeO3 nanopowder under simulated solar irradiation in the presence of a highly polluting textile dye. The results showed that BFO nanoparticles exhibited high photocatalytic activity, especially in basic solutions, and could be reused multiple times without significant activity losses.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
M. Perez-Gonzalez, S. A. Tomas
Summary: Photocatalytic Ag-loaded (TiO2)(0.95)-(ZnO)(0.05) thin films were successfully synthesized using the sol-gel dip-coating method, with the incorporation and surface diffusion of Ag confirmed by secondary ion mass spectrometry measurements. X-ray photoelectron spectroscopy revealed the chemical composition and electronic structure of the samples, confirming the presence of TiO2 and ZnO. The best response in photocatalytic activity was observed in the (TiO2)(0.95)-(ZnO)(0.05) thin films doped with 2 mol% Ag.
Article
Construction & Building Technology
Krishnan U. Ambikakumari Sanalkumar, En-Hua Yang
Summary: Incorporating nano-TiO2 particles into geopolymer can enhance the material's compressive strength, total solar reflectance, photoinduced hydrophilicity, and contaminant decomposition properties. TiO2 acts as fillers in geopolymer, densifying the binder and improving its overall performance.
CEMENT & CONCRETE COMPOSITES
(2021)
Review
Materials Science, Ceramics
Sergio Obregon, Vicente Rodriguez-Gonzalez
Summary: The use of nanostructured coatings is crucial to maintain clean surfaces in public spaces, with TiO2 thin films and coatings offering outstanding properties such as chemical stability, reusability, hydrophilicity, and activation by sunlight. These coatings are suitable for commercial devices that keep public surfaces clean and can have environmental and energy applications in purification, gas sensing, production of renewable fuels, and antimicrobial features.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Andrea Rosati, Michele Fedel, Stefano Rossi
Summary: A set of NIR reflective nano-pigments with YIn0.9Mn0.1O3-ZnO stoichiometry were synthesized using sol-gel route. Different temperatures of calcination produced three ochre pigments and two blue shades, with the thermal properties and chemical changes monitored through TGA, DSC, FT-IR, XRD, and STEM analysis. The synthesized pigments exhibited NIR reflectance ability and were color-typed according to the CIE-1976L*a*b* method.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Amina Bakhtiar, Zohra Bouberka, Pascal Roussel, Christophe Volkringer, Ahmed Addad, Baghdad Ouddane, Christel Pierlot, Ulrich Maschke
Summary: A clay-based TiO2 nanocomposite material with high efficiency in heterogeneous photocatalysis was synthesized using a sol-gel method. The material exhibited a large specific surface area and could be reused without loss of efficiency, showing a relatively quick dye purification rate.
Article
Materials Science, Multidisciplinary
Lucia Rossi, Paula I. Villabrille, Sergio Morales-Torres, Janina A. Rosso
Summary: In this study, palladium-modified titanium dioxide powder photocatalysts were prepared using the sol-gel method. The materials were characterized and their photocatalytic activity for phenol degradation under UV and visible irradiation was tested. The optimal palladium content was determined to be 0.10% atomic Pd, achieving 100% phenol degradation under UV irradiation and 68% under visible irradiation. The immobilization of the material on glass slides using the dip-coating method was also studied, showing promising photocatalytic activity for phenol degradation using solar irradiation.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
