Preparation method and application of efficient load type ozone oxidation catalyst
A kind of ozone oxidation and load-type technology, which is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low content of active components, easy loss of active components, catalyst deactivation, etc., to achieve improved Ozone reaction speed, good degradation effect, and high catalytic activity
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Embodiment 1
[0031] (1) Preparation of titanium sol solution: use titanium nitrate as the titanium source, dissolve it in ultrapure water with pH=1, 50°C, and prepare a titanium sol solution with a titanium salt concentration of 2mol / L, referred to as liquid A;
[0032] (2) Preparation of templating agent sol solution: CTAB was used as structure directing agent, ultrapure water at 50°C was used as solvent, Ti 4+ : The molar ratio of CTAB is 10:1, and the CTAB solution with the same volume as the titanium sol solution is prepared, which is the templating agent sol solution, referred to as B solution;
[0033] (3) Preparation of mesoporous titania molecular sieve precursor: slowly add liquid B to liquid A at a stirring speed of 100 rad / min, react for 20 hours at 80°C to obtain a mixed liquid of mesoporous titania molecular sieve precursor, centrifuge and wash Finally, the precursor of the mesoporous titania molecular sieve was obtained, which was dried in an oven at 105°C for subsequent use;...
Embodiment 2
[0037] (1) Preparation of titanium sol solution: use titanium chloride as the titanium source, dissolve it in ultrapure water with pH=3, 50°C, and prepare a titanium sol solution with a titanium salt concentration of 1mol / L, referred to as liquid A;
[0038] (2) Preparation of templating agent sol solution: CTAB was used as structure directing agent, ultrapure water at 50°C was used as solvent, Ti 4+ : The CTAB molar ratio is 15:1, and the CTAB solution with the same volume as the titanium sol solution is prepared, which is the templating agent sol solution, referred to as B solution;
[0039] (3) Preparation of mesoporous titania molecular sieve precursor: slowly add liquid B to liquid A at a stirring speed of 150 rad / min, react at 80°C for 15 hours to obtain a mixed liquid of mesoporous titania molecular sieve precursor, centrifuge and wash Finally, the precursor of the mesoporous titania molecular sieve was obtained, which was dried in an oven at 105°C for subsequent use; ...
Embodiment 3
[0043] (1) Preparation of titanium sol solution: use titanium sulfate as the titanium source, dissolve it in ultrapure water with pH=4, 40°C, and prepare a titanium sol solution with a titanium salt concentration of 0.5mol / L, referred to as liquid A;
[0044] (2) Preparation of templating agent sol solution: CTAB was used as structure-directing agent, ultrapure water at 40°C was used as solvent, Ti 4+ : The molar ratio of CTAB is 5:1, and the CTAB solution with the same volume as the titanium sol solution is prepared, which is the template sol solution, referred to as B solution;
[0045] (3) Preparation of mesoporous titania molecular sieve precursor: slowly add liquid B to liquid A at a stirring speed of 130rad / min, react at 80°C for 18 hours to obtain a mixed liquid of mesoporous titania molecular sieve precursor, centrifuge and wash Finally, the precursor of the mesoporous titania molecular sieve was obtained, which was dried in an oven at 105°C for subsequent use;
[004...
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