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The utilization of an alternative silica source from agriculture products such as bagasse from sugar and biofuel industries is considered as a zero-waste management. In this work, silica extracted from bagasse was introduced as a support for titanium dioxide (TiO2) to enhance photocatalytic degradation. TiO2 precursor prepared by sol-gel from titanium butoxide was dispersed on bagasse silica with 10, 20, and 30 %wt loading by impregnation method. The photocatalysts were further investigated the physicochemical properties by several techniques. Interestingly, DR-UV-Vis results showed that band gap energy of TiO2/BGS was lower than that of bare TiO2. For catalytic testing, the degradation of methyl orange (2 ppm of initial concertation) as an anionic dye from bare TiO2 (48%) was better that from composite TiO2/BGS (12 -16%) due to an electrostatic repulsion from negatively charge on silica surface to anionic species. However, photodegradation of methylene blue (1 ppm of initial concertation), which was represented to cationic dye, from TiO2/BGS composites (45 -71%) were better than bare TiO2 (29%) due to a higher surface area of active phase. 20 %wt of TiO2/BGS was the best photocatalyst for this route. Therefore, BGS played a crucial role to improve the photocatalytic activities and also was one of the most promising strategies to use the worthless material of bagasse. [ABSTRACT FROM AUTHOR]