Limits...
Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties.

Bogdan J, Jackowska-Tracz A, Zarzyńska J, Pławińska-Czarnak J - Nanoscale Res Lett (2015)

Bottom Line: As a result, photocatalytic surfaces are given new properties.Those properties can then be applied in a variety of disciplines, such as medicine, food hygiene, environmental protection or building industry.Practically, the applications include inactivation of microorganisms, degradation of toxins, removing pollutants from buildings and manufacturing of fog-free windows or mirrors.

View Article: PubMed Central - PubMed

Affiliation: Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland.

ABSTRACT
Nanotechnology is a field of science that is nowadays developing in a dynamic way. It seems to offer almost endless opportunities of contribution to many areas of economy and human activity, in general. Thanks to nanotechnology, the so-called nanomaterials can be designed. They present structurally altered materials, with their physical, chemical and biological properties entirely differing from properties of the same materials manufactured in microtechnology. Nanotechnology creates a unique opportunity to modify the matter at the level of atoms and particles. Therefore, it has become possible to obtain items displaying new, useful properties, i.e. self-disinfecting and self-cleaning surfaces. Those surfaces are usually covered by a thin layer of a photocatalyst. The role of the photocatalyst is most of the time performed by the nanosized titanium dioxide (nano-TiO2). Excitation of nano-TiO2 by ultraviolet radiation initiates advanced oxidation processes and reactions leading to the creation of oxygen vacancies that bind water particles. As a result, photocatalytic surfaces are given new properties. Those properties can then be applied in a variety of disciplines, such as medicine, food hygiene, environmental protection or building industry. Practically, the applications include inactivation of microorganisms, degradation of toxins, removing pollutants from buildings and manufacturing of fog-free windows or mirrors.

No MeSH data available.


Comparison of contact angle (α) on control surface (a) and surface covered by a thin layer of nano-TiO2(b). Both surfaces are exposed to UV radiation. The surface covered by a thin layer of nano-TiO2 and exposed to UV radiation exhibits superhydrophilic properties; the contact angle is an acute angle, 0° < α < 90° (b).
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Fig2: Comparison of contact angle (α) on control surface (a) and surface covered by a thin layer of nano-TiO2(b). Both surfaces are exposed to UV radiation. The surface covered by a thin layer of nano-TiO2 and exposed to UV radiation exhibits superhydrophilic properties; the contact angle is an acute angle, 0° < α < 90° (b).

Mentions: The longer such surface is exposed to UV irradiation, the smaller the contact angle becomes, which is defined as an angle between the solid matter plane and the plane tangent to liquid drop placed on that solid matter (in the tangent point of liquid and solid matter) (Figure 2).Figure 2


Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties.

Bogdan J, Jackowska-Tracz A, Zarzyńska J, Pławińska-Czarnak J - Nanoscale Res Lett (2015)

Comparison of contact angle (α) on control surface (a) and surface covered by a thin layer of nano-TiO2(b). Both surfaces are exposed to UV radiation. The surface covered by a thin layer of nano-TiO2 and exposed to UV radiation exhibits superhydrophilic properties; the contact angle is an acute angle, 0° < α < 90° (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385004&req=5

Fig2: Comparison of contact angle (α) on control surface (a) and surface covered by a thin layer of nano-TiO2(b). Both surfaces are exposed to UV radiation. The surface covered by a thin layer of nano-TiO2 and exposed to UV radiation exhibits superhydrophilic properties; the contact angle is an acute angle, 0° < α < 90° (b).
Mentions: The longer such surface is exposed to UV irradiation, the smaller the contact angle becomes, which is defined as an angle between the solid matter plane and the plane tangent to liquid drop placed on that solid matter (in the tangent point of liquid and solid matter) (Figure 2).Figure 2

Bottom Line: As a result, photocatalytic surfaces are given new properties.Those properties can then be applied in a variety of disciplines, such as medicine, food hygiene, environmental protection or building industry.Practically, the applications include inactivation of microorganisms, degradation of toxins, removing pollutants from buildings and manufacturing of fog-free windows or mirrors.

View Article: PubMed Central - PubMed

Affiliation: Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland.

ABSTRACT
Nanotechnology is a field of science that is nowadays developing in a dynamic way. It seems to offer almost endless opportunities of contribution to many areas of economy and human activity, in general. Thanks to nanotechnology, the so-called nanomaterials can be designed. They present structurally altered materials, with their physical, chemical and biological properties entirely differing from properties of the same materials manufactured in microtechnology. Nanotechnology creates a unique opportunity to modify the matter at the level of atoms and particles. Therefore, it has become possible to obtain items displaying new, useful properties, i.e. self-disinfecting and self-cleaning surfaces. Those surfaces are usually covered by a thin layer of a photocatalyst. The role of the photocatalyst is most of the time performed by the nanosized titanium dioxide (nano-TiO2). Excitation of nano-TiO2 by ultraviolet radiation initiates advanced oxidation processes and reactions leading to the creation of oxygen vacancies that bind water particles. As a result, photocatalytic surfaces are given new properties. Those properties can then be applied in a variety of disciplines, such as medicine, food hygiene, environmental protection or building industry. Practically, the applications include inactivation of microorganisms, degradation of toxins, removing pollutants from buildings and manufacturing of fog-free windows or mirrors.

No MeSH data available.