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

Active Publication Date: 2019-12-20
HENAN UNIV OF SCI & TECH
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  • Claims
  • Application Information

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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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  • Preparation method of nano TiO2/ZrO2 composite catalyst
  • Preparation method of nano TiO2/ZrO2 composite catalyst
  • Preparation method of nano TiO2/ZrO2 composite catalyst

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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 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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Abstract

The invention discloses a preparation method of a nano TiO2 / ZrO2 composite catalyst. The method comprises a hydrothermal method and a coprecipitation method for executing steps of preparation of nanoZrO2 powder and preparation of the nano TiO2 / ZrO2 composite catalyst. According to the process, TiO2 and ZrO2 are taken as raw materials, the TiO2 / ZrO2 composite catalyst which has uniform particle sizes, good combination degree of two particles, large specific surface area, stable mesoporous structure, high-temperature resistance, high activity, supplementary advantages and excellent synergisticphotocatalytic performance is prepared, the method is simple, and the practical effect is better.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a nano-TiO 2 / ZrO 2 The invention relates to a preparation method of a composite photocatalyst photocatalyst, which belongs to a technical application of preparing composite powder by a co-precipitation method and a hydrothermal method. 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 anti-virus, photo-splitting water to produce hydrogen and other fields. However, titanium dioxide has a narrow photoresponse range and can only absorb ultraviolet light in sunlight. At the same time, its quantum efficiency is low, which hinders its practical application and commercial development. [0003] Due to its high hydrothermal stability, good ion exchange performance, and acidic and basic centers, nano-zirconia has become a ...

Claims

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Application Information

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Patent Type & Authority Applications(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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