Effect of TiO2 thin film thickness and specific surface area by low-pressure metal–organic chemical vapor deposition on photocatalytic activities

Investigation of DC magnetron-sputtered TiO2 coatings: Effect of coating thickness, structure, and morphology on photocatalytic activity

“…The photocatalytic activity increased with coating thickness up to 5 µm when the thickness was varied from 100 nm to 15 µm. The surface area increased with coating thickness, as evaluated from the TiO 2 coatings on quartz substrate, until thickness of 2 µm was obtained [36]. Moreover, the study by Heikkilä et al, which used TiO 2 coating of 50 to 500 nm on a quartz substrate, showed an increase in photocatalytic activity upon increased coating thickness with saturation limit of 356 nm.…”

“…Increased photocatalytic activity with increased coating thickness using the methylene blue decomposition method was previously reported by Jung. et al [36] and Heikkilä et al [37]. The study carried out by Jung et al used TiO 2 coating made on quartz glass and alumina balls by chemical vapor deposition (CVD).…”

Crystallite phase-controlled preparation, characterisation and photocatalytic properties of titanium dioxide nanoparticles

“…There are many methods of producing nanostructured TiO 2 , such as the hydrothermal method [9,10], sol-gel technique [11,12], chemical vapour deposition (CVD) [13][14][15], physical vapour deposition [16,17], solvothermal method [18,19], electrochemical approaches (e.g. anodising of Ti) [20][21][22], solution combustion method [23][24][25], microemulsion [26,27], micelle and inverse micelle methods [28,29], ball milling [30], a flame by vapour phase [31], sonochemical reactions [32] and plasma evaporation [33,34].…”

Preparation and Photocatalytic Activity of -Deposited Fabrics

“…Thus, the photocatalytic activity of final TiO 2 film depends strongly on their structures, surface morphology, and total surface area. The increase of surface area should improve the efficiency of the process because it implicates larger contact surfaces exposed to the pollutants [22]. TiO 2 films of 60 nm thickness are more uninterrupted, even than 20 nm films, more even surface structure and smaller particle size contribute to the increase in surface area of the deposited films.…”