Preparation method of nano TiO2/ZrO2 composite catalyst
A technology of nano-titanium dioxide and composite light, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as reduced service life, disappearance of mesopore structure, and structural collapse, and achieve particle size Uniformity, good combination and high uniformity
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[0043] A kind of nano TiO 2 / ZrO 2 The preparation method of composite photocatalyst comprises the following steps:
[0044] Step 1. Take ZrOCl2•8H2O and water to prepare 100ml of 0.1~0.3mol / L ZrOCl 2 solution, adding mass fraction of 3~5% YCl 3 ·6H 2 O (as ZrOCl 2 ·8H 2 O mass meter), add the PEG4000 of mass fraction 1.5~3% (with ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 O mass meter), made a mixed solution;
[0045] YCl in this step 3 ·6H 2 The amount of O added is ZrOCl 2 ·8H 2 The mass fraction of O is 3-5%. The yttrium oxide formed by co-precipitation at this ratio can be used as a stabilizer to make the phase transition temperature range of zirconia close to room temperature. The amount of PEG4000 is ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 1.5-3% of the mass of O, the self-agglomeration of zirconia powder at this ratio can be effectively reduced.
[0046] Step 2. In the method of adding while stirring, add dropwise ammonia solution with a volume concentration of 10% to ...
Embodiment 1
[0068] A kind of nano TiO 2 / ZrO 2 The preparation method of composite photocatalyst comprises the following steps:
[0069] Step 1, take ZrOCl 2 ·8H 2 O and water, made into 100ml of 0.1mol / L ZrOCl 2 solution, adding mass fraction of 3% YCl 3 ·6H 2 O (as ZrOCl 2 ·8H 2 O mass meter), add the PEG4000 of mass fraction 1.5% (with ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 O mass meter), make mixed solution, standby;
[0070] Step 2. In the method of adding while stirring, add dropwise an ammonia solution with a volume concentration of 10% to the mixed solution prepared in step 1 for reaction, then add 0.03mol of CTAB as a surfactant, and control the pH value of the solution to maintain At 10, use pH test paper to test regularly until white flocculent precipitation begins to appear. Then continue to stir for 15min to make the reaction more complete;
[0071] Step 3. Wash the precipitate repeatedly with distilled water and absolute ethanol until the filtrate does not contain Cl ...
Embodiment 2
[0081] A kind of nano TiO 2 / ZrO 2 The preparation method of composite photocatalyst comprises the following steps:
[0082] Step 1. Take ZrOCl2•8H2O and water to make 100ml 0.3mol / L ZrOCl 2 solution, adding mass fraction of 4% YCl 3 ·6H 2 O (as ZrOCl 2 ·8H 2 O mass meter), add the PEG4000 of mass fraction 2% (with ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 O mass meter), make mixed solution, standby;
[0083] Step 2. In the method of adding while stirring, add dropwise an ammonia solution with a volume concentration of 10% to the mixed solution prepared in step 1 for reaction, then add 0.04mol of CTAB as a surfactant, and control the pH value of the solution to maintain At 10, use pH test paper to test regularly until white flocculent precipitation begins to appear. Then continue to stir for 30min to make the reaction more complete;
[0084] Step 3. Wash the precipitate repeatedly with distilled water and absolute ethanol until the filtrate does not contain Cl - Ions (with 0....
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