Method for preparing hollow spherical silicon dioxide with mesoporous shell

Method for preparing hollow spherical silicon dioxide with mesoporous shell

  • CN 102,616,792 A
  • Filed: 03/26/2012
  • Published: 08/01/2012
  • Est. Priority Date: 03/26/2012
  • Status: Active Application
First Claim
Patent Images

1. the preparation method with hollow sphere silicon-dioxide of mesoporous lamella is characterized in that, as follows preparation:

  • A, with 0.5-4.5 g not the pure silicon base spherical mesoporous molecular sieve of template agent removing join in the 10-100 ml deionized water, to 8-14, stir 0.5-24 h with alkaline substance solution regulation system pH value;

    B, the product after will stirring change in the closed reactor, handle 4-72 h at 100-200 ℃

    of following constant temperature;

    C, taking-up reaction kettle, naturally cooling in air;

    D, white precipitate in the reaction kettle is separated, after first ethanol is washed 2-4 time again with washing 2-5 time, 40-80 ℃

    of vacuum-drying 4-48 h then;

    E, with dry gained white powder at 400-700 ℃

    of following roasting 3-8 h, obtain having the hollow mesoporous silicon sphere material of mesoporous shell;

    Aforesaid pure silicon spherical mesoporous molecular sieve is spherical MCM-41 mesopore molecular sieve or SBA-15 mesopore molecular sieve or MCM-48 mesopore molecular sieve;

    Aforesaid alkaline substance solution is 2mol/L ammoniacal liquor or the 1 mol/L NaOH aqueous solution or the 25 wt % tetraethyl ammonium hydroxide aqueous solution.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×