Nickel doped TiO₂ films by a modified laser plasma source for photocatalytic applications

Abstract

A: We reports a study on pure and Ni-doped TiO 2 thin films produced via laser ablation technique. The novelty of the work consists that both synthesis and doping were carried out in a single process, using a modified laser ion source to simultaneously make pulsed laser deposition (PLD) and low-energy ion implantation (by post-acceleration method). In particular, two titania films were synthesized via PLD starting from a rutile target. One of the two films was doped with Ni ions, accelerated with a voltage of 20 kV. The total implanted dose, evaluated by a Faraday cup, resulted to be 1 × 10 14 ions/cm 2 . The crystalline phase of the obtained TiO 2 films was analysed by Raman spectroscopy. A higher photocatalytic activity, measured under UV irradiation using methylene blue, was estimated for the Ni-doped titania film with respect the pure one. K: Accelerator Applications; Plasma diagnostics -probes; Plasma generation (laserproduced, RF, x ray-produced) 1Corresponding author.

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

“…TiO 2 is a transition metal-oxide semiconductor, [102,103] predominantly used in photo-catalytic, [104][105][106][107][108] photo-electrochemical water splitting, [109][110][111][112] and photo-voltaic [12,[113][114][115] applications. A good description of TiO 2 can be found in the reviews.…”

Enhanced adsorption capacity of porous titanium dioxide nanoparticles synthetized in alkaline sol

“…It has a compact crystalline structure and exists in three phases: anatase, rutile and brookite. It can be synthesized by several chemical [25][26][27][28] and physical [29,30] techniques in the form of nanoparticles (NPs) [31,32] and thin films [33][34][35]. At low calcination temperatures (T C < 400 °C), it is amorphous and exhibits a porous structure but, to our best knowledge, there are no many studies that take into consideration this property for environment applications.…”

Correlation between Photocatalysis and Antibacterial Responses of Cu‐Doped TiO2 Films: Influence of Doping Tuning into the Oxide Matrix

“…It can be synthesized in the form of thin films, nanostructures, and nanoparticles, using several chemical and physical techniques. Pulsed laser deposition (PLD), [11][12][13] RF magnetron sputtering, [14,15] chemical vapor deposition (CVD), [16] and sol-gel spin coating [8,17,18] are the most common used methods to produce films of high quality, whereas nanoparticles [19] can be synthetized by sol-gel, [9,20,21] CVD, [22] and pulsed laser ablation in liquid. [23] Many factors affect TiO 2 photocatalysis, such as the titania polymorph, lattice defects, crystalline size, doping, and surface charge.…”

“…The response of this material in a narrow part of the electromagnetic spectrum (λ ¼ 387 nm for anatase and λ ¼ 413 nm for rutile) represents a great limitation since it requires a welldefined UV light source. Nevertheless, it can be overcome by doping the material, [13,24] in order to extend the TiO 2 response into the visible range. [25][26][27][28] The effect of doping depends on many factors, for example, the method used, the type of the dopant, and its concentration.…”

“…The doping of TiO 2 by metal atoms is generally carried out via chemical processes, [17,25,26,[43][44][45] via sputtering, [26][27][28] or ion implantation, [12,13] though the last technique requires alreadysynthetized titania films. The sol-gel technique is considered by researchers as the most exploited method for producing pure and doped titanium powders, thanks to the low process temperature and the easy control of the reaction conditions.…”