Attempts to Synthesize Zeolitic Composites from Stellerite

Abstract

A feasible method to synthesize NaA and NaY zeolite from stellerite, the very cheap raw material found in China, was reported in this article to reduce the cost of zeolite synthesis for the first time. After stellerite is calcined above 973 K with sodium carbonate, this natural zeolite can be slowly dissolved in alkali solution and partly forms the gels, then transforms to zeolite NaA or NaY by structural rearrangement. The effect of synthetic conditions such as the ratio of different cation used in the reactive mixture on the resulting zeolite is examined. Furthermore, a new NaA/MCM-41 composite possessing both micropore and mesopore is synthesized by adding the NaA zeolite into the synthetic system, and the impact of zeolite additive on the pore structure of final porous composite is also explored.

Rapid Synthesis of Phenyl-Functionalized Mesoporous Silica Using as a Highly Efficient Fiber Coating of Solid-Phase Microextraction

“…As far as surface tailoring is concerned, it is generally the optimal choice to introduce organic functional groups or metals onto the exterior and/or interior surfaces before further measures are taken. Surface modification can prompt the utilizations of these materials in adsorption, separation, sensor design, catalysis, drug delivery, and so on [6][7][8][9][10]. At present, the post-synthesis grafting [11] and organosiloxane/siloxane co-condensation [12] are frequently employed for organofunctionalized mesoporous silicas.…”