Photocatalytical and antibacterial activity of TiO2 nanoparticles obtained by laser ablation in water

Zimbone, Massimo; Buccheri, Maria Antonietta; Cacciato, G.; Sanz, R.; Rappazzo, Giancarlo; Boninelli, Simona; Reitano, R.; Romano, Lucia; Privitera, V.; Grimaldi, Maria Grazia

doi:10.1016/j.apcatb.2014.10.031

Cited by 115 publications

(57 citation statements)

References 69 publications

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“…During this time lapse, water molecules dissociate in atomic hydrogen and oxygen, and react with titanium atoms ejected from the target, realizing a Ti-O-H species. In the timescale of hundreds of μs, the cavitation bubble collapses depositing on the Ti target a layer of titanium oxides [9,10,13]. The formation of this material is clearly observed by a change in the color of the surface, from metallic to black.…”

Section: Resultsmentioning

confidence: 92%

“…In order to evaluate the photocatalytic activity of the TiO x nanostructured film, UV and visible photo-degradation tests with Methylene-Blue (MB) dye were carried out. Experimental procedure is described elsewhere [10]. Apparent Photon Efficiency in the UV range is calculated according to the ISO10678:2010 [12].…”

Section: Methodsmentioning

confidence: 99%

“…1. TiO 2 nanoparticles were obtained in solution as described previously [10] while the Ti foil was covered by a thin black layer of TiO x (on a Ti substrate: TiO x /Ti) as shown schematically in the upper part of Fig. 1.…”

Section: Preparationmentioning

confidence: 99%

“…Recently, an alternative, industrially compatible, scalable and environmentally friendly technique such as laser ablation in pure water was applied to synthesize TiO 2 nanoparticles in solution [10][11]. Although these nanoparticles showed high photocatalytic and antibacterial activities, they are dispersed in solution, requiring a further step to remove or recover nanoparticles after the photocatalytic water treatment.…”

Section: Introductionmentioning

confidence: 99%

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Black TiOx photocatalyst obtained by laser irradiation in water

Zimbone

Cacciato

Sanz

et al. 2016

Catalysis Communications

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Section: Resultsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Black TiOx photocatalyst obtained by laser irradiation in water

Zimbone

Cacciato

Sanz

et al. 2016

Catalysis Communications

Self Cite

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“…Many methods have been created to fabricate TiO 2 , such as sol-gel [4,5], hydrothermal treatment [6,7], assisted-template method [8][9][10], laser ablation [11][12][13][14], and electrochemical anodic oxidation [15,16]. However, these methods have a common shortcoming that it needs a long reaction time to obtain the photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Fast and Large-Scale Anodizing Synthesis of Pine-Cone TiO2 for Solar-Driven Photocatalysis

et al. 2017

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Anodization has been widely used to synthesize nanostructured TiO 2 films with promising photocatalytic performance for solar hydrogen production and pollution removal. However, it usually takes a few hours to obtain the right nanostructures even on a small scale (e.g., 10 mm × 20 mm). In order to attract interest for industrial applications, fast and large-scale fabrication is highly desirable. Herein, we demonstrate a fast and large-scale (e.g., 300 mm × 360 mm) synthesis of pine-cone TiO 2 nanostructures within two min. The formation mechanism of pine-cone TiO 2 is proposed. The pine-cone TiO 2 possesses a strong solar absorption, and exhibits high photocatalytic activities in photo-oxidizing organic pollutants in wastewater and producing hydrogen from water under natural sunlight. Thus, this study demonstrates a promising method for fabricating TiO 2 films towards practical photocatalytic applications.

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In Situ Self‐Assembled Polyoxotitanate Cages on Flexible Cellulosic Substrates: Multifunctional Coating for Hydrophobic, Antibacterial, and UV‐Blocking Applications

Pranantyo

Kang

et al. 2018

Adv Funct Materials

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Surface coating is a powerful approach to fabricate multifunctional materials that are essential for numerous applications. However, to achieve such multifunctional coating with a facile single-step procedure, especially on flexible substrates, is still a big challenge, as current fabrication protocols usually require sophisticated equipment and complicated procedures. Here, a novel coating technology involving in situ self-assembly of the polyoxotitanate (POT) cage [Ti 18 Mn 4 O 30 (OEt) 20 Phen 3 ] is reported to fabricate multifunctional cotton fabrics in a single step. The in situ generated spherical microparticles of 0.8 µm average diameter are firmly mounted on the underlying cotton substrate, imparting the coated surface with robust hydrophobicity (water contact angle of 148.1 ± 5.4°), antibacterial activity (against Escherichia coli, Staphylococcus epidermidis, and Staphylococcus aureus), and excellent UV-blocking performance (89% blocked at 350 nm). This coating technology is efficient, straightforward, requires no specialized equipment, and most importantly, is readily extendable to other flexible substrates. Combined with the rapidly developing area of POT cages and similar molecular materials, the reported technology based on in situ self-assembly holds great promise for further advancing the fabrication of multifunctional flexible devices via a single-step coating operation.

show abstract

Photocatalytical and antibacterial activity of TiO2 nanoparticles obtained by laser ablation in water

Cited by 115 publications

References 69 publications

Black TiOx photocatalyst obtained by laser irradiation in water

Black TiOx photocatalyst obtained by laser irradiation in water

Fast and Large-Scale Anodizing Synthesis of Pine-Cone TiO2 for Solar-Driven Photocatalysis

In Situ Self‐Assembled Polyoxotitanate Cages on Flexible Cellulosic Substrates: Multifunctional Coating for Hydrophobic, Antibacterial, and UV‐Blocking Applications

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