The oxygen vacancies induced local surface plasmon resonance for NIR shielding in titanium-tungsten oxide doped borosilicate glasses

Abstract

The global energy demand is going to increase manifold in coming years. To meet future energy requirements, we need to save energy by all the means. The main perspective of the present work is to synthesize cost-effective borosilicate glasses which were synthesised for NIR-shielding application. NIR shielding energy saving glass system was prepared by conventional melt quenching method. The chosen chemical composition is xWO3+(27−x)Na2O+38.7B2O3+34SiO2+0.3TiO2 (where x= 0, 1, 2, 3, 4 and 5 mol%). The X-ray diffraction (XRD), UV–Vis-NIR and Raman spectroscopy were employed to evaluate the structural and optical properties of titanium-tungsten oxide doped borosilicate glasses, respectively. X-Ray Photoelectron spectroscopy (XPS) confirmed the chemical states of the tungsten in the glasses. The glass having x=3 mol% of WO3 and 0.3 mol% of TiO2 borosilicate glass (BSG 3) is found to have good NIR shielding ability (Tmin ∼ 77.3 % at 2217 nm) with acceptable visible light transmittance (Tmax ∼ 90.4 % at 772 nm), and hence proposed for applications in NIR-shielding energy-saving windows. The present study emphasizes on tunable NIR-shielding performance of synthesised energy-saving glasses. The optimized glass composition can be taken from lab to industrial application and many more endeavors for the manufacturing of energy saving glasses. The glass having x=3 mol% of WO3 and 0.3 mol% of TiO2 borosilicate glass (BSG 3) is found to have good NIR shielding ability (Tmin ∼ 77.3 % at 2217 nm) is attributed to titanium-tungsten oxide incorporation in glass network. The energy saving glasses, transparent to visible light and having NIR shielding, can be used in glass windows of industry buildings, houses and motor vehicles to reduce the load on air conditioners.