High porosity mesoporous siliceous structures

• Main Authors: MATTEUCCI SCOTT T, TUCKER CHRISTOPHER J, KELLY-ROWLEY ANNE M, TWAY CATHY L, KILOS BEATA A
• Format: Patent
• Language: Chinese; English
• Published: 13.08.2014
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

A process comprising: A) contacting one or more of sources of silicon oxide, selected from water soluble.silica sources arid alkali metal silicates, with an aqueous reaction medium, comprising one or more nonionic surfactants and thereby forming mesoporous structures comprising crosslinked silicon oxide units, wherein said crosslinked silicon oxide units have pores of about 1 to about 100 nanometers and wherein the aqueous reaction medium exhibits a pH of about 0 to about 4.0; B) exposing the aqueous reaction medium containing the mesoporous structures to elevated temperatures for a time sufficient to achieve the desired structure and pore size. Preferred water soluble silica sources comprise silicic acid, or polysilicic acids, The aqueous reaction, medium is prepared by combining one or more nonionic surfactants and water, thereby forming an aqueous, reaction medium. comprising micelles. Preferably, the aqueous reaction medium further comprises, a. micelle swelling agent capable of swelling micelles formed b