Preparation and Characterization of Self-Cleaning Glass for Vehicle with Niobia Nanosheets

Abstract

Self-cleaning glasses were prepared by coating niobia nanosheets and investigated on the performance. The coated glass heated at>450 degrees C had very low turbidity, high hardness, and excellent adhesion properties. Niobia nanosheets ([Nb(3)O(8)](-)) reacted with sodium ions (Na(+)) diffused from the glass into the films to form a crystalline phase of NaNb(3)O(8) and this phase was converted to NaNbO(3) at >450 degrees C. The films exhibited photoinduced hydrophilicity under UV irradiation but low photocatalytic oxidation activity. Excellent self-cleaning ability of the niobia nanosheet coated glass was confirmed by the Taber abrasion test, which is thought to be a candidate as self-cleaning glasses for vehicles.

Recent development and future prospects ofTiO2photocatalysis

“…[76] A very smooth surface structure and higher adhesion power are characteristic properties of 2D sheets. [71,77] Many methods are used for the synthesis of nanostructured TiO 2, such as sol-gel, [78] hydrothermal, [79][80][81] solvothermal, [82] and chemical vapor deposition (CVD) [83,84] methods (Figure 6).…”

Titanoniobate and niobate nanosheet photocatalysts: superior photoinduced hydrophilicity and enhanced thermal stability of unilamellar Nb3O8nanosheet

“…23 Katsumata et al demonstrated that the NaNbO 3 film derived from the twodimensional (2D) crystal precursor of Nb 3 O 8 (so-called ''nanosheet'') could be used for the self-cleaning coating of vehicle windows due to very low turbidity, high hardness, and excellent adherence, in addition to good hydrophilic activity. 24 Low-dimensional nanoscale materials (nanotubes, nanorods, nanosheets, etc.) have been extensively investigated due to their unique properties associated with nanosize effects and lowdimensional anisotropy.…”

Systems developed for application as self-cleaning surfaces and/or antimicrobial properties: a short review on materials and production methods

“…According to the authors [33], the properties of the coating obtained are suitable for architectural glass and photovoltaic (PV) module with high solar energy conversion efficiency. Katsumata et al [34] used niobia nanosheets ([Nb 3 O 8 ] -) and sodium ions to obtain sodium niobate (NaNbO 3 ) and, from this material, prepared NaNbO 3 films as self-cleaning glass for vehicles. The films were obtained by spin-coating using glass as a substrate.…”