Preparation method of transparent mesoporous gel monolith with dual-functional-modified hole walls

Abstract

The invention provides a preparation method of transparent mesoporous gel monolith with dual-functional-modified hole walls. The method is characterized by using ethylidene bridge-bond-type organosilicon ester as a single silicon source, and using mild acidity hydrolyzed by cheap inorganic aluminum salt to induce hydrolysis of the silicon source, without introducing dangerous and corrosive inorganic acid as a hydrolysis catalyst of the silicon source. By adjusting a composition ratio and a gelling way of a system, the transparent mesoporous gel monolith with the hole walls simultaneously modified by the ethylidene and Al atom and with a mole ratio of Si and Al being adjusted in a range of 6-80 can be rapidly prepared. The method is concise, high-efficient and environmental-friendly, the product is regular in shape, adjustable in size and good in transparency, and has important application value in a field of development of novel optical devices. The mesoporous gel monolith with the dual-functional-modified hole walls obtained by removing a template through solvent extraction has a wide application prospect in fields of catalysis, adsorption, separation, etc.

Description

technical field [0001] The invention discloses a method for preparing a transparent mesoporous gel monolith modified with dual functions of the pore wall, which belongs to the technical field of mesoporous molecular sieve functional materials, and specifically relates to a large-sized, crack-free pore wall modified simultaneously by ethylene and Al atoms . A preparation method of optically transparent mesoporous gel monolith. Background technique [0002] The transparent mesoporous gel monolith formed by surfactant as a template has high light transmittance, low external area, and its inherently ordered and adjustable pore structure can make dye molecules, photosensitive molecules, semiconductor particles Or conductive nanowires and other guest molecules can be intercalated at a higher concentration without mutual aggregation between molecules, so they have broad application prospects in the development of new optical devices. [0003] However, as the host material of trans...

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Problems solved by technology

[0004] The invention discloses a method for preparing a transparent mesoporous gel monolith with bifunctional modification of the pore wall. The preparation method of large-size, crack-free, optically transparent mesoporous gel monoliths with simultaneously adjusted property and chargeability can improve the relatively single skeleton composition of existing transparent mesoporous silica gel monoliths, and provide different The regulation of the dispersion state and stability of the guest molecules in the mesoporous gel channel provides a variety of micro-environments, which in turn provides a new class of functionalized matrix materials for the development of new optical devices.