Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Heterogeneous radiocatalysis is a catalytic process promoted by the direct adsorption of high radiant energy capable of activating a semiconductor such as TiO2, which generates free radicals very reactive at the surface that allow oxidation-reduction reactions with adsorbed species, breaking some molecular bonds and reducing or oxidizing them less complex species. We irradiated methylene blue with 60Co gamma rays and added of TiO2 during irradiation with different doses of gamma radiation, measuring the remaining methylene blue concentration by spectrophotometry UV. The degradation of the organic compound was enhanced when doses increased and with the addition of semiconductors of up to 1g of catalyst per liter of suspension.