Highly efficient photocatalytic TiO₂coatings deposited by open air atmospheric pressure plasma jet with aerosolized TTIP precursor

Open air plasma deposited antimicrobial SiOx/TiOx composite films for biomedical applications

“…In principle, the presence of dopants reduce the band gap and hence redshift the effect. This redshift was observed, by Fakhouri et al [11], in the absence of dopants in visible light, however only after a thermal post treatment of the APPJ deposited titanium oxide films. This was verified by evaluating the antimicrobial effect induced by visible light in absence of dopants, and by degradation of Rhodamine B under UV light.…”

One‐step deposition of nano‐Ag‐TiO2 coatings by atmospheric pressure plasma jet for water treatment: Application to trace pharmaceutical removal using solar photocatalysis

“…The PCA experiments were conducted using a two steps method. First, a screening study was performed by degrading RhB (10 ml, 5 mg/L) at room temperature according to the method reported in a reference . The TiO 2 and nano‐Ag‐TiO 2 samples, deposited on 9 × 25 mm 2 glass substrates were placed in a UV grade reactor cell with a diameter of 35 mm and a height of 20 mm facing a 125 W Philips white light source.…”

“…The deposition methodology is based on a setup previously reported, [33] which was inspired by work from Dowling Denis et al [35] Ag-TiO 2 coating were prepared by introducing TTIP into an open-air APPJ (Plasmatreater AS400; Plasmatreat GmbH, Steinhagen, Germany) by means of an "in-house" constructed spraying system previously reported ( Figure 1). [33] High deposition rates (10-20 µm/s) were achieved by spraying a liquid precursor into the plasma torch. The Ag NPs (average particle size of 100 nm) were dispersed in TTIP liquid precursor with a concentration ranging from 0 to 0.7wt%.…”

“…First, a screening study was performed by degrading RhB (10 ml, 5 mg/L) at room temperature according to the method reported in a reference. [33] The TiO 2 and nano-Ag-TiO 2 samples, deposited on 9 × 25 mm 2 glass substrates were placed in a UV grade reactor cell with a diameter of 35 mm and a height of 20 mm facing a 125 W Philips white light source. The solution was circulated at a flow rate of 0.5 ml/s using a peristaltic pump (Masterflex, Gelsenkirchen, Germany) connected to the radiated photocatalytic cell and the absorbance was monitored using a spectrophotometer (Maya 2000+; Ocean Optics) set at 554 nm.…”

“…A non‐equilibrium atmospheric pressure plasma jet (APPJ), characterized by a relatively high gas temperature (1,000K–1,500K), has been effective for coating thin films with high deposition rates . In our previous study, we reported the PCA of the TiO 2 thin films prepared by APPJ which was significantly improved when compared with optimum N‐doped TiO 2 thin films . In this study, we deposit Ag‐TiO 2 composite coating with controlled porosity and crystal size in a one‐step process by using APPJ process.…”