NOVELTY - Preparing cadmium sulfide/titania mesoporous composite photo-catalytic material involves weighing 1.0g tri-block copolymer i.e. Pluronic (RTM: Tri-block copolymer) P-123 and dissolving in 15ml absolute ethanol. The mixture is stirred at room temperature for 0.5 hours and then sonicated for 10 minutes at ultrasonic power of 200 Watt to obtain P-123/ethanol mixed solution. The 3.2ml concentrated hydrochloric acid is added drop-wise to 4.0g of tetrabutyl titanate in separate beaker. The cadmium nitrate tetrahydrate and sodium sulfide nonahydrate are mixed to obtain a mixed solution.    USE - Method for preparing cadmium sulfide/titania mesoporous composite photo-catalytic material used in solar energy battery (claimed).    ADVANTAGE - The method enables to prepare cadmium sulfide/titania mesoporous composite photo-catalytic material in eco-friendly manner that is chemical resistant, corrosion resistant, and has high light catalyzing activity.    DETAILED DESCRIPTION - Preparing cadmium sulfide/titania mesoporous composite photo-catalytic material involves weighing 1.0g tri-block copolymer i.e. Pluronic (RTM: Tri-block copolymer) P-123 and dissolving in 15ml absolute ethanol. The mixture is stirred at room temperature for 0.5 hours and then sonicated for 10 minutes at ultrasonic power of 200 Watt to obtain P-123/ethanol mixed solution. The 3.2ml concentrated hydrochloric acid is added drop-wise to 4.0g of tetrabutyl titanate in separate beaker. The cadmium nitrate tetrahydrate and sodium sulfide nonahydrate are mixed to obtain a mixed solution. The obtained P-123/ethanol mixed solution is mixed with obtained mixed solution at room temperature for 6-8 hours to obtain sol solution. The sol is poured into synthetic open dish and humidity of solution is maintained at 50-60%. The solution is allowed to stand at room temperature for 30 days. The sol solution is pulverized into powder and then calcined at 200 degrees C for 4 hours. The calcined powder is added to ethylene amine aqueous solution and refluxed for 48 hours. The temperature of solution is maintained at 125 degrees C and pH of solution is adjusted to 11-12. The solution is centrifuged under reflux and precipitate is washed with deionized water. The washed precipitate is dried at 60 degrees C for 12 hours. The solution is dried and milled into powder. The powder is calcined at 350 degrees C under nitrogen atmosphere for 3 hours to obtain stable mesoporous structure. The powder is calcined at 500 degrees C for 2 hours in air to remove the tri-block copolymer P-123 to obtain product.