Sol–gel and low-temperature solvothermal synthesis of photoactive nano-titanium dioxide

The current trends in the green syntheses of titanium oxide nanoparticles and their applications

“…Colloidal TiO 2 NPs are used in degradation of toxic chemicals in water Centi et al (4), Pirkanniemi and Sillanpää (5). Mostly TiO 2 NPs are produced via physicochemical methods like chemical vapor deposition, micro emulsion, chemical precipitation, hydrothermal crystallization, and sol-gel methods Muhd Julkapli and colleagues (3), Valencia et al (6). All these methods require high temperature, pressure and toxic chemicals which limits their production and potential medical uses Chen et al (7).…”

Synthesis of ZnO/CuO and TiO2/CuO nanocomposites for light and ultrasound assisted degradation of a textile dye in aqueous solution

“…The band gap energy of all nanocomposites was calculated from diffuse-reflectance spectroscopy spectra recorded in the wavelength of 200-800 nm at room temperature by performing a Kubelka-Munk analysis [10][11]. The band gap for different molar ratio of ZnO/CuO and TiO 2 /CuO nanocomposites are displayed in Table 2.…”

“…In order to obtain band gap energy, diffuse reflectance UV-Vis measurements were performed using Shimadzu UV-Vis spectrophotometer. Band gap energy was calculated using Kubelka-Munk equation from reflectance spectra [10][11]. The nitrogen adsorption/desorption isotherms were measured using Nova Quantachrome 2000.The total surface area was determined via BET method.…”

Synthesis and Photocatalytic Sterilization Performance of SA/TiO2

“…When the ethanol volume was 60 mL, the catalyst showed its excellent sterilization activity. The interpretation for the tendency of inactivation performance was that Ti precursor failed to fully hydrolyze with little in situ water, and then the increasing of in situ water content accelerated the hydrolysis of tetrabutyl titanate, forming TiO 2 particles with small sizes and large specific surface area [23], thus greatly enhancing the sterilization activity of the catalyst. However, when the in situ water content was over 60 mL, due to the excessive water dilution, resulting in the viscosity of TiO 2 sol, the crosslinking degree and polymerization degree of the polycondensate would significantly decrease, which hindered the crystal to the form complete structure in the subsequently solvothermal reaction [24].…”