Preparation method and application of tetracycline-polluted water body restoring material
A technology of ethanol aqueous solution and nano-cerium dioxide, which is applied in nanotechnology for materials and surface science, water pollutants, water/sewage treatment, etc., can solve the problems of reducing the reduction and degradation efficiency of nano-zero-valent iron, and achieve easy Promote the use, reduce agglomeration, and improve the removal efficiency
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[0034] A method for preparing nano-cerium dioxide includes the following steps:
[0035] 1) Add cerium nitrate and surfactant to water, mix and stir to obtain mixed solution A;
[0036] 2) Add ammonium carbonate solution to mixed solution A and stir to obtain mixed solution B;
[0037] 3) The mixed solution B is filtered, and the resulting precipitate is washed and dried, then calcined and ground into powder to obtain nano ceria.
[0038] Further, step 3) of the preparation method of nano ceria is specifically: filtering the mixed solution B, obtaining the white colloid and washing it with ultrapure water and ethanol three times to obtain the white colloid A, and putting the resulting precipitate into It is calcined in a muffle furnace and ground into powder to obtain nano-cerium oxide.
[0039] Preferably, in step 1) of the preparation method of nano-cerium dioxide, the mass ratio of cerium nitrate, surfactant and water is (30-50):(3-5):1000.
[0040] Preferably, in step 2) of the prep...
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[0054] Preparation example:
[0055] A preparation method of nano ceria particles:
[0056] (1) Add 0.1mol / L cerium nitrate hexahydrate and 4g / L PEG 4000 to 100ml ultrapure water, stir and mix;
[0057] (2) Add 150ml of 0.1mol / L (NH 4 ) 2 CO 3 The aqueous solution was added to the solution described in step (1), and stirred at 45°C for 15 minutes, filtered and washed several times to obtain white colloidal cerium carbonate;
[0058] (3) Put the white colloid in a drying oven and dry it at 80℃ for 8h;
[0059] (4) Put the dried white colloid into a muffle furnace, heat up to 500°C at 20°C / min, and roast for 4h. After the temperature of the muffle furnace drops to room temperature, take out the yellow solid and grind it into a powder to obtain nanometer two Ceria.
[0060] A kind of nano Fe 0 @CeO 2 The preparation method of particles, the steps are:
[0061] (1) Add 0.023mol / L of the above-prepared nano ceria, 0.05mol / L ferrous sulfate hexahydrate, 4g / LPVP into 100ml of 30%v / v ethanol aqu...
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