The composition of gases over a graphite oxide is found to depend on the temperature with CO2 being the main component with a range of 23-460 degrees C. In the temperature range of 150-230 degrees C, where the most intense yield of gases was observed, CO forms in small amounts. CH4 and CH2O were produced at temperatures below 230 degrees C, O-2 was observed at 150-300 degrees C, while the complex H2OH center dot COOH was produced at temperatures above 150 degrees C. When films composed of graphite oxide nano-sheets were exposed to UV radiation, CO2, CO, H2O, and O-2 were produced. Published by Elsevier B.V.