ZrO2 incorporated TiO2 based solar reflective nanocomposite coatings on glass to be used as energy saving building components

Abstract

Single layer design ZrO 2 incorporated TiO 2 based transparent hard reflecting nanocomposite coatings on glass substrates were developed by sol-gel dip-coating technique using zirconium (IV) n-propoxide (ZP) and titanium (IV) isopropoxide (TTIP) followed by heat treatment at 500 °C for 1 h. The above nanocomposite based TiO 2-ZrO 2 coated glass could be used as component for efficient energy saving building materials with esthetic beauty. The TZ85:15 coated glasses (dimension: 200 × 200 mm 2) with coating thickness 90 ± 10 nm having refractive index value of 1.985 ± 0.002 were found to be flawless with good hardness ~ 5H and adhesion properties. GIXRD and Raman analysis of specimens revealed the crystalline nature of the heat-treated coatings, whereas the formation of Ti-O-Zr network was observed by XPS and FTIR. Coated glass showed > 28% of average reflection (within wavelength range of 350-2500 nm) and ~ 31% (within wavelength range of 400-800 nm). It also revealed the golden yellow reflected color under tube-light exhibiting enhanced aesthetic beauty making suitable candidate for heat reflecting component.

Effect of organically modified titania and zirconia nanoparticles on characteristics, properties of coating based on acrylic emulsion polymer for outdoor applications

“…28,29 As can be seen from Table 5, the coating filled with mixture of m-TiO 2 NPs and m-ZrO 2 NPs had higher reflectance index in comparison with coatings loaded single modified nanoparticles (i.e., m-TiO 2 NPs or m-ZrO 2 NPs). The reason may be ZrO 2 particles having good reflection in the 380-800 nm wavelength range 24 while TiO 2 NPs having light reflection ability well in visible and near infrared region. 24 Therefore, the m-ZrO 2 NPs incorporation with m-TiO 2 NPs could produce synergistic effectiveness in solar-reflectance of acrylic coatings.…”

“…The reason may be ZrO 2 particles having good reflection in the 380-800 nm wavelength range 24 while TiO 2 NPs having light reflection ability well in visible and near infrared region. 24 Therefore, the m-ZrO 2 NPs incorporation with m-TiO 2 NPs could produce synergistic effectiveness in solar-reflectance of acrylic coatings. The AcT1Z samples were chosen for further studies.…”

“…However, effect of modified nanoparticles as well as effect of m‐TiO 2 NPs combined with m‐ZrO 2 NPs on solar reflection and properties of acrylic coating acrylic coatings has not been investigated. Combination of two kinds of the NPs could produce synergistic effect 20,21,24 . For example, Bhattacharyya et al fabricated the solar reflective nanocomposite coatings on glass by sol–gel dip‐coating technique on the base of ZrO 2 NPs incorporated with anatase TiO 2 NPs having higher solar reflection in comparison with the coating used single NPs 24 .…”

“…20,21,24 For example, Bhattacharyya et al fabricated the solar reflective nanocomposite coatings on glass by sol-gel dipcoating technique on the base of ZrO 2 NPs incorporated with anatase TiO 2 NPs having higher solar reflection in comparison with the coating used single NPs. 24 Due to photocatalytic properties, the anatase TiO 2 NPs are not used in polymer coating for outdoor application. For outdoor building application, the coatings play in role as protection and decoration.…”