Micro-TiO2 as a starting material for new photocatalytic tiles

Bianchi, Claudia L.; Gatto, S.; Pirola, Carlo; Scavini, Marco; Vitali, S.; Capucci, V.

doi:10.1016/j.cemconcomp.2012.08.019

Cited by 26 publications

(16 citation statements)

References 16 publications

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“…The formulation with the SiO 2 -based compounds and the following calcination step lead to a decrease of the surface area but preservation of the pure anatase form verified by XRD measurements [13]. As reported by Anderson and Bard [14], the presence of SiO 2 , together with TiO 2 , enhances the formation of hydroxyl radical…”

Section: Sample Characterizationmentioning

confidence: 62%

New Surface Properties in Porcelain Gres Tiles with a Look to Human and Environmental Safety

Bianchi

Pirola

Gatto

et al. 2012

Advances in Materials Science and Engineering

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Traditional photocatalysis is here brought forward for both the use of nanosized TiO 2 crystallites and the possibility to have a release of TiO 2 particles during the final use of the manufactured products. In the present paper both the preparation and characterization of a new generation of photocatalytic tiles are presented. The originality of these products is the surface presence of microsized TiO 2 as it is not clear yet the impact of the nanoparticles on both human and environmental safety. TiO 2 is here mixed with a silica compound and the final thermal treatment at 680• C allows the complete surface vitrification which, in turn, makes the tiles surface strongly resistant to abrasion. Photocatalytic efficiency towards the degradation of NO x in gas phase was measured in both a batch and a plug-flow reactor. The latter reactor configuration was also modeled by digital simulations.

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Section: Sample Characterizationmentioning

confidence: 62%

New Surface Properties in Porcelain Gres Tiles with a Look to Human and Environmental Safety

Bianchi

Pirola

Gatto

et al. 2012

Advances in Materials Science and Engineering

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“…Generally, micro-TiO 2 is usually used as a pigment but never in photocatalysis; however, as already mentioned, testing it for the photodegradation of different kinds of pollutants, both in gas and in aqueous phase, the efficiency of this material was confirmed at this point [1,10,24]. Furthermore, application of micro-TiO 2 in different materials, such as building materials and paintings, may bring many benefits, because when compared with nanometric TiO 2 , it is easier to handle, cheaper as well, and shows a good photoefficiency [10].…”

Section: Introductionmentioning

confidence: 84%

“…For this reason, the use of micrometric TiO 2 becomes more and more interesting and few years ago some investigations demonstrated the possibility to use this material for the photodegradation of pollutant molecules, such as volatile organic compounds (VOCs), nitrogen oxides (NO x ) or organic molecules that mainly pollute the water systems [23,24]. It has also been successfully used in building materials to exploit self-cleaning and antibacterial effects [25].…”

Section: Introductionmentioning

confidence: 99%

A New Frontier of Photocatalysis Employing Micro-Sized TiO2: Air/Water Pollution Abatement and Self-Cleaning/ Antibacterial Applications

Bianchi¹,

Pirola²,

Sacchi³

et al. 2016

Semiconductor Photocatalysis - Materials, Mechanisms and Applications

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This chapter presents the use of a commercial micro-sized TiO 2 powder as an alternative to the traditional nano-powders as semiconductors in photocatalytic processes. Results of the photocatalytic efficiency towards the photodegradation of the traditional pollutant molecules both in gas phase (nitrogen oxides (NO x) and volatile organic compounds (VOCs)) and in water phase (phenol) are presented and compared to the results obtained with two nano-sized reference powders. Micro-sized TiO 2 is also industrially coated at the surfaces of porcelain grés tiles (Active Clean Air and Antibacterial Ceramic™). The possibility to have a photocatalytic material, strongly stuck at the surface of a vitrified tile, increases the use of photocatalysis in real conditions: no problem of filtration of the semiconductor from the liquid medium after use and no risks of leakage of nanoparticles in the atmosphere. Tests were performed using reactors equipped with UV-A lamps and with suitable analytical systems, depending on the final purpose. Characterization data from both powders and coated tiles are put in correlation with the photocatalytic results to understand the semiconductor action during the photocatalytic process. Polluting molecules were chosen in order to cover all the common aspects of environmental pollution: NO x and some VOCs represent the model molecules to test the efficiency of the micro-sized TiO 2 (degradation from the pristine molecule to CO 2 or inorganic salts) in gas phase. As for the water pollution, phenol was chosen as common pollutant in worldwide rivers. Moreover, tests on self-cleaning and antibacterial properties are also reported. The positive results of micro-sized TiO 2 both in powder and coated onto the surface of porcelain grés tiles open the way to new photocatalytic products that do

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“…Based on the above mentioned, the use of micro-TiO 2 in order to take advantage from its photocatalytic properties is a challenging study to develop. [14,15,16]. …”

Section: Page 5 Of 20mentioning

confidence: 99%

Surface decoration of commercial micro-sized TiO2 by means of high energy ultrasound: A way to enhance its photocatalytic activity under visible light

Bianchi

Pirola

Vitali

et al. 2015

Applied Catalysis B: Environmental

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Highlights Surface decoration of micro-sized TiO 2 by means of high-energy ultrasound AbstractAlthough the TiO 2 is one of the most promising materials for its photocatalytic potential related to the pollution abatement, it strongly suffers from the low photocatalytic activity if it is used under visible light and not under UV light. Among the various possible modifications, the surface decoration with metal or metal oxides NPs can be a good strategy to increase the potential of TiO 2 in the visible range. In this paper, a sonochemical method that exploits the use of high-energy ultrasounds is suggested to obtain this surface decoration. The support is a commercial and micrometric TiO 2 , cheaper and easier to handling than the nanometric P25. Samples were tested on the photodegradation of toluene and acetone in a gas phase system, using both the UV and LED lamp.

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Micro-TiO2 as a starting material for new photocatalytic tiles

Cited by 26 publications

References 16 publications

New Surface Properties in Porcelain Gres Tiles with a Look to Human and Environmental Safety

New Surface Properties in Porcelain Gres Tiles with a Look to Human and Environmental Safety

A New Frontier of Photocatalysis Employing Micro-Sized TiO2: Air/Water Pollution Abatement and Self-Cleaning/ Antibacterial Applications

Surface decoration of commercial micro-sized TiO2 by means of high energy ultrasound: A way to enhance its photocatalytic activity under visible light

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