Spherical MCM-41 molecular sieve with particle size more than 400 nanometers, and synthesis method for the same

Abstract

The invention discloses a spherical MCM-41 molecular sieve with the particle size more than 400 nanometers, and a synthesis method for the same, belonging to the technical field of inorganic functional materials. The average particle size of the existing MCM-41 molecular sieve particles is only 100 nm, and the existing MCM-41 molecular sieve particles are irregular in shape and non-uniform in size; and the synthesis method for the existing MCM-41 molecular sieve particles needs strict conditions and consumes long time. The MCM-41 molecular sieve particles provided by the invention are spherical, and the particle size of the MCM-41 molecular sieve particles is not less than 436 nm and not more than 485 nm. In synthesis method for the MCM-41 molecular sieve particles provided by the invention, a single template is used, the template raw material is decyl trimethyl ammonium bromide, the synthesis process is executed under normal pressure, the pH value of the reaction system is adjusted by sodium hydroxide or ammonia water, and the synthesis process takes 1.5-2.5 hours. The synthesized molecular sieve particles are used for manufacturing chemical sensors, electronic and optical devices and the like.

Description

technical field [0001] The invention relates to a spherical MCM-41 molecular sieve with a particle diameter greater than 400 nanometers and a synthesis method thereof, belonging to the technical field of inorganic functional materials. Background technique [0002] Molecular sieve materials have regular micropores or mesopores, high order, uniform pore size and huge specific surface area, and are used as catalysts, catalyst supports, chemical sensors, electronic and optical devices, and shape selectivity in different fields Adsorbent, etc. Among them, MCM-41 mesoporous molecular sieve has regularly arranged, uniform and adjustable mesoporous channels, and has a huge specific surface area. These characteristics make it an ideal host material, which can be used to prepare functional materials for special purposes by loading some active substances. The disadvantage of the existing MCM-41 mesoporous molecular sieve is that the average particle size of molecular sieve particles...

AI Technical Summary

Problems solved by technology

The disadvantage of the method is that the thermal stability and hydrothermal stability of the molecular sieve synthesized by the synthetic method of hexadecyltrimethylammonium bromide are poor; the particle shape of the molecular sieve is irregular and the size is not uniform; small diameter

Adopting the synthetic method of octaalkyltrimethylammonium bromide and dodecyltrimethylammonium bromide, not only process conditions are harsh, time-consuming is long, and the molecular sieve synthesized is the same as adopting hexadecyltrimethylammonium bromide The molecular sieves synthesized by the synthetic method have roughly the same disadvantages

Images