%K Calcination temperature; FTIR; Halogen lamps; Initial concentration; Mass composition; metal doping; Orange II; Photo catalytic degradation; Photocatalytic degradation of Orange II; Powder X ray diffraction; Precipitation methods; Scanning electrons; TiO; UV-vis spectroscopy; Visible light, Azo dyes; Fourier transform infrared spectroscopy; Photocatalysis; Photocatalysts; Photodegradation; Precipitation (chemical); Sustainable development; Thermogravimetric analysis; Titanium dioxide; Ultraviolet spectroscopy; Ultraviolet visible spectroscopy; X ray diffraction, Calcination %X The decolorization of Orange II was studied under visible light using bimetallic Cu-Ni/TiO 2 prepared via precipitation method. Cu:Ni mass composition of 9:1 was prepared and the effect of calcination temperature on the Orange II removal was investigated. The raw photocatalysts were activated by calcination at three different temperatures (180°C, 200°C and 300°C) for 1 hour duration. Photocatalysts were characterized using Thermogravimetric Analysis (TGA), Fourier-Transformed Infra red spectroscopy (FTIR), Powder X-Ray diffraction (XRD) and Field-Emission Scanning Electron Microscopy-Energy Dispersive X-ray (FESEM-EDX). The photocatalytic degradation of Orange II was conducted under the irradiation of visible light (500 W halogen lamp) at pH 6.8. The extent of degradation for Orange II with initial concentration of 50 ppm was monitored using UV-vis spectroscopy and TOC analysis was conducted at the end of the reaction. Results showed that complete Orange II removal was achieved for Cu:Ni/TiO 2 photocatalysts calcined at 180°C, and 200°C Photocatalyst calcined at 180°C showed the best performance with 100the lowest TOC value of 16.1 ppm. © 2011 IEEE. %J 2011 National Postgraduate Conference - Energy and Sustainability: Exploring the Innovative Minds, NPC 2011 %L scholars1688 %O cited By 8; Conference of 3rd National Postgraduate Conference - Energy and Sustainability: Exploring the Innovative Minds, NPC 2011 ; Conference Date: 19 September 2011 Through 20 September 2011; Conference Code:88531 %R 10.1109/NatPC.2011.6136258 %D 2011 %A N. Riaz %A F.K. Chong %A B.K. Dutta %A Z.B. Man %A M.S. Khan %A E. Nurlaela %T Effect of calcination temperature on Orange II photocatalytic degradation using Cu:Ni/TiO 2 under visible light %C Perak