Titanium dioxide thin films, their structure and its effect on their photoactivity and photocatalytic properties

Photocatalytic Lithography with Atomic Layer–Deposited TiO2 Films to Tailor Biointerface Properties

“…They assign these results to the ALD process based on TiCl 4 and H 2 O, where the crystallinity of the films is negligible at the start of the process, but anatase crystal growth occurs when a thickness of 50 nm is reached. Kääriäinen et al reported an increase in photocatalytic activity in the thickness range between 2 and 15 nm for TiO 2 deposited using TiCl 4 and H 2 O at 350 °C with a peak performance range from thicknesses of 15–65 nm. At the same time, the anatase content was shown to increase for films up to 15 nm while for thicker films >65 nm, a rutile phase is formed.…”

“…Direct photocatalytic activity was investigated in‐depth in the past, typically by means of rather thick TiO 2 layers >100 nm prepared by spin‐coating or sol–gel depositions and using rather long UV light exposures ranging from 10 to 120 min . More recently, it has been demonstrated that atomic layer deposited (ALD) TiO 2 films display a good photocatalytic activity with an increase in efficiency for thicker layers up to 100 nm . However, to preserve the sensitivity of a real‐time surface‐sensitive transducer, the thickness of the TiO 2 coating is preferably limited to a few nanometers.…”

Applications of Porous Ceramics

“…Consequently, the relevant technique is limited in the practical treatment of pollution, resulting in a limitation of the industrialization uses of the TiO 2 photocatalyst. The carrying technique of fixing catalysts is an effective way to solve this problem, and it is also an ideal way to adjust active components and design catalytic systems [47,48]. As a result, the current research on TiO 2 photocatalyst has generally focused on the preparation of the film on carriers.…”

TiO<sub>2</sub> Films Synthesis over Polypropylene by Sol-Gel Assisted with Hydrothermal Treatment for the Photocatalytic Propane Degradation

“…However, anatase obtained at temperatures near 400˚C [1], is mainly the phase used as a photocatalyst, which is due to its capacity to adsorb water and to generate hydroxyl groups (OH) [2] [3]. Nowadays, scientists are looking for paths to synthesize TiO 2 at low temperatures for applications in solar cells, fuel cells and photocatalytic systems among others.…”