Bantawal, H.Bhat, D.K.2026-02-052018International Journal of Engineering and Technology (UAE), 2018, 7, 4, pp. 105-109https://doi.org/10.14419/ijet.v7i4.5.20022https://idr.nitk.ac.in/handle/123456789/25341Hierarchical porous BaTiO<inf>3</inf> nano-hexagons was synthesized via a simple hydrothermal route by using TiO<inf>2</inf> and Ba(OH)<inf>2</inf>.8H<inf>2</inf>O as starting materials under alkaline environment and its photocatalytic activity was evaluated under visible light by taking methylene blue (MB) as a model pollutant. The prepared BaTiO<inf>3</inf> was characterized by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), energy dispersive X-rays analysis (EDX), high resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET) analysis and diffused reflectance spectroscopy (DRS) techniques. It is noteworthy that the BaTiO<inf>3</inf> nanohexagons exhibited significant photocatalytic activity towards the degradation of MB under visible light irradiation. This significant photocatalytic activity of BaTiO<inf>3</inf> under visible light is mainly attributed to the special morphology and formation of Ti3+ defects. © 2018 Authors.Advanced oxidation processBarium titanateHydrothermalPerovskitePhotocatalysisTitanium oxide