Enhancement of the photocatalytic property of TiO2 columnar nanostructured films by changing deposition angle

Li, Zhengcao; Teng, Yi; Xing, Liping; Zhang, Na; Zhang, Zhengjun

doi:10.1016/j.materresbull.2013.10.021

Cited by 15 publications

(9 citation statements)

References 18 publications

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“…Several attempts were done in the literature in order to increase the TiO 2 layer porosity above the Thornton limit by using sputtering or evaporation approaches which generated cauliflower37, penniform38 or zig-zag39 structures. Some other attempts were done by GLancing Angle Deposition (GLAD)40 to deposit Ti nanostructures414243 which requires ex-situ oxidation for TiO 2 reaction; or by using array of template materials (e.g. polystyrene nano-spheres) to exploit their shadowing effect during TiO 2 growth44.…”

mentioning

confidence: 99%

Multi-Scale-Porosity TiO2 scaffolds grown by innovative sputtering methods for high throughput hybrid photovoltaics

Sanzaro

Smecca

Mannino

et al. 2016

Sci Rep

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We propose an up-scalable, reliable, contamination-free, rod-like TiO2 material grown by a new method based on sputtering deposition concepts which offers a multi-scale porosity, namely: an intra-rods nano-porosity (1–5 nm) arising from the Thornton’s conditions and an extra-rods meso-porosity (10–50 nm) originating from the spatial separation of the Titanium and Oxygen sources combined with a grazing Ti flux. The procedure is simple, since it does not require any template layer to trigger the nano-structuring, and versatile, since porosity and layer thickness can be easily tuned; it is empowered by the lack of contaminations/solvents and by the structural stability of the material (at least) up to 500 °C. Our material gains porosity, stability and infiltration capability superior if compared to conventionally sputtered TiO2 layers. Its competition level with chemically synthesized reference counterparts is doubly demonstrated: in Dye Sensitized Solar Cells, by the infiltration and chemisorption of N-719 dye (∼1 × 1020 molecules/cm3); and in Perovskite Solar Cells, by the capillary infiltration of solution processed CH3NH3PbI3 which allowed reaching efficiency of 11.7%. Based on the demonstrated attitude of the material to be functionalized, its surface activity could be differently tailored on other molecules or gas species or liquids to enlarge the range of application in different fields.

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confidence: 99%

Multi-Scale-Porosity TiO2 scaffolds grown by innovative sputtering methods for high throughput hybrid photovoltaics

Sanzaro

Smecca

Mannino

et al. 2016

Sci Rep

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“…On one hand, the reduced bandgap energy improves the easy transfer process of electrons and holes so that it can improve the charge separation efficiency. On the other hand, N ion irradiation increases oxygen vacancy defects so as to hinder the recombination of photo‐excited electrons and holes …”

Section: Resultsmentioning

confidence: 99%

“…TiO 2 anatase X‐ray diffraction peaks disappear after ion implantation, and only Ti reflexes can be detected, while the anatase peaks become apparent again upon thermal annealing at 450°C. Further study of ion irradiation still needs to be concentrated on the effect of different energies, optimization between dose and energy, and their detailed mechanism …”

Section: Introductionmentioning

confidence: 99%

Effect of nitrogen ion irradiation treatment to the enhancement of ZnO photocatalytic performance

Li²,

Qiu

et al. 2020

Surface & Interface Analysis

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To overcome the drawbacks of fast charge recombination and the limited visible‐light absorption of semiconductor photocatalysts, N ion irradiation is used to enhance photocatalytic performance of ZnO nanowires. Compared with as‐grown ZnO nanowires, the photocatalytic performance of ZnO under dose of 5 × 1015 cm−2 was efficiently improved because of the bandgap energy decreasing and the introduction of oxygen vacancies defects. On one hand, the reduced bandgap energy improves the easy transfer process of electrons and holes, thus improving the charge separation efficiency, and visible‐light absorption. On the other hand, N ion irradiation increases oxygen vacancy defects and hinders the recombination of photo‐excited electrons and holes. This study has certificated that ion irradiation is an efficient way and created a new insight on the enhancement of photocatalytic activity.

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“…The oblique TiO 2 NWs were deposited on Si and quartz substrates, respectively [2]. Firstly, the substrates were ultrasonically cleaned in ethanol and de-ionized water baths and were fixed at an 80 degree angle toward the target.…”

Section: Experiments Detailsmentioning

confidence: 99%

“…Compared with the traditional TiO 2 , nano-TiO 2 shows the advantages such as structural stability, great photocatalytic activity, non-toxicity and low price [1,2]. Nano-TiO 2 performs more effectively in removing waste pollutant from aqueous solution than those obtained from conventional techniques such as chemical precipitation, electro deposition, ion-exchange adsorption [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Xe ion irradiation on photocatalytic performance of oblique TiO2 nanowire arrays

Teng

Chen

et al. 2015

Applied Surface Science

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Enhancement of the photocatalytic property of TiO2 columnar nanostructured films by changing deposition angle

Cited by 15 publications

References 18 publications

Multi-Scale-Porosity TiO2 scaffolds grown by innovative sputtering methods for high throughput hybrid photovoltaics

Multi-Scale-Porosity TiO2 scaffolds grown by innovative sputtering methods for high throughput hybrid photovoltaics

Effect of nitrogen ion irradiation treatment to the enhancement of ZnO photocatalytic performance

Effect of Xe ion irradiation on photocatalytic performance of oblique TiO2 nanowire arrays

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