Preparation method of poly-metallic oxide-loaded catalytic ozonation catalyst and application
An ozone catalytic oxidation and multi-metal oxide technology, applied in the field of water treatment, can solve the problems of strict catalytic conditions, short service life and high production cost, and achieve the effects of stable catalytic activity, no secondary pollution and easy recovery.
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[0025] The invention discloses a preparation method of a supported multi-metal oxide ozone catalytic oxidation catalyst, which comprises the following steps:
[0026] a. Activate diatomite with a diameter of d in a microwave generator, the microwave power is p, and the microwave activation time is T 1 , and then immersed in NaOH solution, the concentration of NaOH solution is C 1 , immersion time T 2 , taken out and dried to obtain pretreated diatomaceous earth;
[0027] b. Immerse the pretreated diatomite in copper nitrate, nickel nitrate, manganese nitrate, cobalt nitrate, and nitric acid at a concentration of 0.1mol / L, 0.3mol / L, 1mol / L, 0.5mol / L, and 0.7mol / L, respectively. In the mixed solution of iron, the ratio of pretreated diatomite to the mixed solution is n 1 , the time for the pretreated diatomite to be immersed in the mixed solution is T 3 , the immersion temperature is 25°C to obtain the catalyst precursor;
[0028] c. After drying the catalyst precursor in a...
Embodiment 1-5
[0030] According to the preparation method of the above-mentioned loaded multi-metal oxide ozone catalytic oxidation catalyst, the process parameters of each step of Examples 1-5 are shown in Table 1 below:
[0031] Table 1 process parameter table
[0032]
[0033]
[0034] In Comparative Examples 1-14, the effects of carrier type, mixed solution type and concentration, and microwave activation process were studied. The process parameter values of each variable are shown in Table 2-4 below. The preparation method and other process parameters are the same as in Example 3.
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