A kind of preparation method of nanometer titanium dioxide/zirconia composite photocatalyst

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 the problems of structural collapse, mesopore structure disappearance, service life reduction, etc., and achieve high uniformity , Uniform particle size, prolonging the service life

Active Publication Date: 2022-07-26
HENAN UNIV OF SCI & TECH
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Problems solved by technology

But pure ZrO 2 The effect of direct application of mesoporous materials in the field of catalysis is not very ideal, mainly because: pure ZrO 2 When the template agent is removed, the mesoporous material will easily collapse at high temperature due to the excessive shrinkage of the inorganic wall, and cannot withstand the high temperature and hydrothermal conditions in the catalytic environment for a long time, resulting in the disappearance of the mesoporous structure. reduce

Method used

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  • A kind of preparation method of nanometer titanium dioxide/zirconia composite photocatalyst
  • A kind of preparation method of nanometer titanium dioxide/zirconia composite photocatalyst
  • A kind of preparation method of nanometer titanium dioxide/zirconia composite photocatalyst

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preparation example Construction

[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, prepare 100ml of 0.1~0.3mol / L ZrOCl 2 solution, add 3~5% mass fraction of YCl 3 ·6H 2 O (in ZrOCl 2 ·8H 2 O mass meter), add 1.5~3% mass fraction of PEG4000 (as ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 O mass meter) to obtain a mixed solution;

[0045] YCl in this step 3 ·6H 2 The amount of O added is ZrOCl 2 ·8H 2 3-5% of O mass fraction, the yttrium oxide formed by co-precipitation in this ratio can be used as a stabilizer to make the phase transition temperature range of zirconium dioxide move closer to room temperature, and the amount of PEG4000 is ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 1.5-3% of O mass, the self-agglomeration of zirconium dioxide powder can be effectively reduced under this ratio.

[0046] Step 2, in the mode of adding while stirring, dropwise the ammonia solution with a volume concentration of ...

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, prepare 100ml of 0.1mol / L ZrOCl 2 solution, adding 3% mass fraction of YCl 3 ·6H 2 O (in ZrOCl 2 ·8H 2 O mass meter), add 1.5% mass fraction of PEG4000 (as ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 O mass meter) to prepare a mixed solution for use;

[0070] Step 2, in the mode of adding while stirring, dropwise the ammonia solution with a volume concentration of 10% in the mixed solution obtained in step 1 to react, then add 0.03mol of CTAB to do surfactant, and control the pH value of the solution to keep At 10, check regularly with pH paper until a white flocculent precipitate 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 dehydrated alcohol until the filtrate does not contain Cl - ions (with 0.1m...

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 prepare 100ml of 0.3mol / L ZrOCl 2 solution, adding 4% mass fraction of YCl 3 ·6H 2 O (in ZrOCl 2 ·8H 2 O mass meter), add 2% mass fraction of PEG4000 (as ZrOCl 2 ·8H 2 O and YCl 3 ·6H 2 O mass meter) to prepare a mixed solution for use;

[0083] Step 2, in the mode of adding while stirring, dropwise the ammonia solution with a volume concentration of 10% in the mixed solution obtained in step 1 to react, then add 0.04mol of CTAB to do surfactant, and control the pH value of the solution to keep At 10, check regularly with pH paper until a white flocculent precipitate 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 dehydrated alcohol until the filtrate does not contain Cl - ions (with 0.1mol / L AgN...

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Abstract

A preparation method of nano-titanium dioxide / zirconia composite photocatalyst, comprising hydrothermal method and co-precipitation to carry out nano-ZrO 2 The steps of powder preparation and nano-TiO 2 / ZrO 2 Steps for the preparation of composite photocatalysts. The process uses TiO 2 and ZrO 2 As the raw material, a TiO with uniform particle size, good combination of two components, large specific surface area, stable mesoporous structure, good high temperature resistance, strong activity, complementary advantages, and excellent synergistic photocatalytic performance was prepared. 2 / ZrO 2 The composite photocatalyst has the advantages of simple method and good practical effect.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a nanometer TiO 2 / ZrO 2 A preparation method of a composite photocatalyst photocatalyst belongs to a technical application of a coprecipitation method and a hydrothermal method to prepare a composite powder. Background technique [0002] Nano-titanium dioxide is the most commonly used semiconductor photocatalytic material, which is widely used in sewage treatment, air purification, antibacterial and disinfection, photo-splitting water for hydrogen production and other fields. However, titanium dioxide has a narrow photoresponse range, can only absorb ultraviolet light in sunlight, and its quantum efficiency is low, which hinders its practical application and commercial development. [0003] Nano-zirconia has become a research hotspot of catalytic mesoporous materials due to its high hydrothermal stability, good ion exchange performance, and the characteris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/08B01J37/03B01J37/08B01J37/10
CPCB01J35/004B01J21/066B01J37/105B01J37/03B01J35/08B01J37/0018B01J37/088B01J37/086
Inventor 魏世忠潘昆明王飞鸿赵阳李雪荣徐流杰周玉成李秀青张程毛丰陈冲熊美倪小鹏
Owner HENAN UNIV OF SCI & TECH
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