Side by Side Absortion Comparison (IMAGE) Graphene Flagship Caption The photocatalyst degrades up to 70% more atmospheric nitrogen oxides (NOx) than standard titania nanoparticles in tests on real pollutants. Credit Italcementi / Heidelberg Cement / Graphene Flagship Usage Restrictions Credit: Italcementi / Heidelberg Cement / Graphene Flagship License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.