Preparation method of composite metal oxide catalyst, catalyst and application thereof and method for catalytic ozone oxidation
A composite metal and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, heterogeneous catalyst chemical elements, etc., can solve the problem of catalytic performance to be improved, limited catalytic efficiency, etc. problems, to achieve the effect of improving the removal rate of organic matter and the utilization rate of ozone, improving the biodegradability of sewage, and improving the catalytic efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0014] In a first aspect, the present invention provides a method for preparing a composite metal oxide catalyst, the method comprising: in the presence of water, under stirring conditions, a cerium-containing compound, a tin-containing compound, a manganese-containing compound, an alkaline precipitant and optionally H 2 o 2 contacting, and controlling the pH value of the mixed liquid during the contacting process to be 5-9 to obtain a precipitation slurry, and then performing aging, solid-liquid separation, washing, drying and calcining in sequence.
[0015] In the method of the present invention, in order to improve the ozone utilization rate and catalytic effect of the prepared catalyst, preferably, the molar ratio of the cerium-containing compound calculated by cerium, the tin-containing compound calculated by tin, and the manganese-containing compound calculated by manganese 1:(0.5-6):(0.7-4.3), more preferably 1:(1-4):(1-3). Further, the inventors of the present invent...
Embodiment 1
[0041] Dissolve 0.02mol of cerium nitrate hexahydrate and 0.05mol of tin tetrachloride into 200ml of deionized water to obtain a solution. Dissolve 0.04mol potassium permanganate into 150ml deionized water to obtain solution b. Under the stirring condition of 150rpm, add solution a to solution b dropwise, and adjust the pH with 5mol / L potassium hydroxide solution at the same time, and control the pH of the mixed solution during the dropping process to be 7.5±0.1. After the dropwise addition, continue stirring for 5 hours, filter, wash, vacuum dry at 80° C. for 6 hours, and calcinate at 450° C. for 5 hours to obtain tin-cerium-manganese composite metal oxide catalyst C1.
Embodiment 2
[0043] Dissolve 0.015mol cerium ammonium nitrate and 0.03mol stannous sulfate into 200ml deionized water to obtain a solution. Dissolve 0.028mol sodium permanganate into 150ml deionized water to obtain solution b. Under the stirring condition of 150rpm, add solution a to solution b dropwise, and adjust the pH with 5mol / L potassium carbonate solution at the same time, and control the pH of the mixed solution during the dropping process to be 7.8±0.1. After the dropwise addition, continue stirring for 3 hours, filter, wash, vacuum dry at 100° C. for 4 hours, and calcinate at 600° C. for 3 hours to obtain tin-cerium-manganese composite metal oxide catalyst C2.
PUM
| Property | Measurement | Unit |
|---|---|---|
| chemical oxygen demand (mass) | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More