Preparation method of efficient and stable catalytic membrane based on multi-scale hollow molecular sieve fiber

A preparation method of an efficient and stable catalytic membrane based on a multi-scale hollow molecular sieve fiber, comprising the following steps:

• (a) mixing a silicon source, an aluminum source, water, and an organic template, conducting complete hydrolysis by stirring, and heating, to obtain a mixed solution I, wherein a molar ratio of the silicon source, the aluminum source, the water, and the organic template is in a range of (8-10):(0.2-0.5):(550-650):(20-30), and the heating is conducted at 40° C. to 60° C. for 4 hours to 6 hours;
• (b) supplementing water to the mixed solution I to obtain a mixed solution II until a mass of the mixed solution II is the same as a mass of the mixed solution I, and conducting a hydrothermal reaction to obtain a suspension;
• (c) conducting centrifugation on the suspension and drying an obtained powder I;
• (d) mixing a dried powder I with an iron source to obtain a mixture, and conducting high-temperature deposition and calcination on the mixture in sequence to obtain a powder II;
• (e) dissolving the powder II obtained in step (d) in an organic solvent, and dispersing to obtain a dispersion;
• (f) adding a surfactant to the dispersion, dissolving by stirring, and conducting an ultrasonic treatment to obtain a mixed solution;
• (g) conducting coaxial electrospinning using the mixed solution obtained in step (f) as an outer solution and paraffin oil as an inner solution to obtain a composite fiber;
• and
• (h) conducting calcination on the composite fiber obtained in step (g) to obtain the efficient and stable catalytic membrane based on a multi-scale hollow molecular sieve fiber.