The current invention describes methods and compositions of various sorbents based on aerogels of various silanes and their use as sorbent for carbon dioxide. Methods further provide for optimizing the compositions to increase the stability of the sorbents for prolonged use as carbon dioxide capture matrices.
 This invention was made with the United States Government support under the Contract no. DE-SC0004289 from the U.S. Department of Energy. The Government has certain rights in the invention.