Effect of initial water content and calcination temperature on photocatalytic properties of TiO2 nanopowders synthesized by the sol–gel process

Application of Taguchi Method for The Synthesis of Nano-sized TiO2 Powders by Acid-Used Sol-Gel Method

“…00-021-1272 for anatase, 01-089-0554 for rutile and 00-029-1360 for brookite phase). All of these outcomes can be seen in Figure 2 and they are in accordance with the literature [3,8,11]. In order to investigate morphology of nanopowders, TEM images were taken that shown in Figure 3.…”

“…Besides, nano-sized materials are significant for biomedical, communication, energy, electronic applications because of their good electrical, optical and magnetic properties that are different from their bulk counterparts [2]. Among them, nano-sized TiO2 powder is one of the most significant particulate material using for various objectives, because of its great features of a high refractive index leading to a high keeping power and whiteness, nontoxicity, high oxidizing capability, chemical stability, relatively low production cost and easy availability in the market [3,4]. TiO2 have been prepared by several physical and chemical deposition techniques such as chemical bath deposition, sol-gel, hydrothermal, spray pyrolysis, plasma oxidation, pulsed laser deposition etc [5][6][7].…”

“…TiO2 have been prepared by several physical and chemical deposition techniques such as chemical bath deposition, sol-gel, hydrothermal, spray pyrolysis, plasma oxidation, pulsed laser deposition etc [5][6][7]. Among these techniques, the sol-gel technique has many advantages when compared with the other methods, that is, it has a simple and cost-effective experiential array and also provides low temperature processing, nucleation and growth kinetics, homogeneity, reliability, controllability, reproducibility, etc [3].…”

Outstanding supercapacitive properties of Mn-doped TiO2 micro/nanostructure porous film prepared by anodization method

“…The integrated area is maximised at 300 °C, and the area is minimised at 500 °C. The influence of annealing temperature is manifested in two ways: along with the increasing annealing temperature, on the one hand, improved atomic order degree and the formation of rutile TiO 2 would lead to the enhanced conductivity and the increased utilisation rates of active materials, therefore, the capacitive value would increase accordingly 2 ; on the other hand, mutual condensation reaction of hydroxyl groups would result in the reduced specific surface area 37 38 and the decreased hydrophilicity, hence, the capacitive value would decrease accordingly. The two opposite effects of annealing temperatures on the capacitive properties result in that the highest capacitive value appears when the samples were annealed at 300 °C ( Fig.…”

The synthesis of transparent TiO2 photoelectrodes assisted by rheological agent (triton x-100, PVP and F-127) for dye sensitized solar cells

“…[8][9][10][11][12][13][14] Among these methods, the sol-gel has considerable advantages, such as a low processing temperature, the capacity to obtain nanostructures, chemical homogeneity, controlled and homogeneous doping. [15][16][17][18] However, the main limitation of the sol-gel method is the low thickness obtained by dip-coating deposition; therefore, the dissolution of rheological agents (RA) in the sol, i.e., Triton, PVP, Pluronic F-127, Brij, etc., is a promising approach for the increase of its viscosity and thereby obtaining a thicker TiO 2 film, without losing its transparency. Moreover, the rheological agents are considered porous templates; when they are dissolved in the sol, they begin to segregate and form micelles, after which the alkoxide precursors undergo hydrolysis _________________________________________________________________________________________________________________________ (CC) 2018 SCS.…”