A kind of preparation method of nanometer cu2o/ag/tio2-zeolite composite photocatalyst

A composite light and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as difficult separation, and achieve the effects of improving efficiency, high flexibility, and large adjustable range

Inactive Publication Date: 2019-05-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if only nano-Cu 2 O, Ag and TiO 2 As a photocatalyst, the composite has good photocatalytic efficiency, but it is not easy to separate it from water

Method used

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  • A kind of preparation method of nanometer cu2o/ag/tio2-zeolite composite photocatalyst

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Embodiment 1

[0024] Nano-Cu in this embodiment 2 O / Ag / TiO 2 -The preparation method of zeolite composite photocatalyst specifically comprises the following steps:

[0025] (1) Disperse 5 g of artificial zeolite A in 50 mL of 10 mol / L NaOH solution, and stir at 100 ° C for 1 hour to form a zeolite precursor;

[0026] (2) Preparation of nano Cu 2 O, Ag and TiO 2 Mix the aqueous solution, and then fully mix with the zeolite precursor to prepare a mixed gel;

[0027] (3) subjecting the mixed gel to crystallization treatment, and after the crystallization is completed, the intermediate is obtained through separation, washing and drying;

[0028] (4) The intermediate is separated, washed and dried, and then calcined at a high temperature to obtain the nano-Cu 2 O / Ag / TiO 2 - Zeolite composite photocatalyst.

[0029] In step (1), the amount of zeolite added in the alkali solution is: 0.01 g of zeolite is added to each milliliter of alkali solution.

[0030] Nano Cu in step (2) 2 O, Ag and...

Embodiment 2

[0035] Nano-Cu in this embodiment 2 O / Ag / TiO 2 -The preparation method of zeolite composite photocatalyst specifically comprises the following steps:

[0036] (1) Disperse 10 g of artificial zeolite X in 100 mL of 12 mol / L NaOH solution, and stir at 120 ° C for 3 hours to form a zeolite precursor;

[0037] (2) Preparation of nano Cu 2 O, Ag and TiO 2 Mix the aqueous solution, and then fully mix with the zeolite precursor to prepare a mixed gel;

[0038] (3) subjecting the mixed gel to crystallization treatment, and after the crystallization is completed, the intermediate is obtained through separation, washing and drying;

[0039] (4) The intermediate is separated, washed and dried, and then calcined at a high temperature to obtain the nano-Cu 2 O / Ag / TiO 2 - Zeolite composite photocatalyst.

[0040] In step (1), the amount of zeolite added in the alkali solution is: 0.008g of zeolite is added per milliliter of alkali solution.

[0041] Nano Cu in step (2) 2 O, Ag and ...

Embodiment 3

[0045] Nano-Cu in this embodiment 2 O / Ag / TiO 2 -The preparation method of zeolite composite photocatalyst specifically comprises the following steps:

[0046] (1) Add the silicon source and the aluminum source into the alkali solution, mix thoroughly, and form a zeolite precursor under a certain temperature condition;

[0047] (2) Nano-Cu2 O, Ag and TiO 2 Add to the zeolite precursor and mix thoroughly to make a mixed gel;

[0048] (3) subjecting the mixed gel to crystallization treatment, and after the crystallization is completed, the intermediate is obtained through separation, washing and drying;

[0049] (4) The intermediate is separated, washed and dried, and then calcined at a high temperature to obtain the nano-Cu 2 O / Ag / TiO 2 - Zeolite composite photocatalyst.

[0050] In step (1), the molar ratio of silicon source, aluminum source and alkali solution is 1:2:200. The silicon source is silica sol, and the aluminum source is pseudo-boehmite. Wherein, the alkalin...

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Abstract

The invention relates to a preparation method of a nano Cu2O / Ag / TiO2-zeolite composite photocatalyst. The method comprises the following steps: (1) adding a silicon source and an aluminum source into an alkali solution, and thoroughly mixing to form a zeolite precursor at a certain temperature; (2) adding nano Cu2O, Ag and TiO2 into the zeolite precursor, and thoroughly mixing to obtain a mixed gel; (3) carrying out crystallization treatment on the mixed gel, and after the crystallization finishes, carrying out separation, washing and drying to obtain an intermediate; and (4) after carrying out the separation, washing and drying, carrying out high-temperature calcination to obtain the nano Cu2O / Ag / TiO2-zeolite composite photocatalyst. Compared with the prior art, the method has the advantages of simple preparation process, high flexibility and wider silica-alumina ratio adjustable range, effectively enhances the organic pollutant degradation efficiency of the photocatalyst, and has favorable application prospects.

Description

technical field [0001] The invention belongs to the technical field of composite photocatalyst, relates to a preparation method of photocatalyst, especially relates to a kind of nano-Cu 2 O / Ag / TiO 2 - Preparation method of zeolite composite photocatalyst. Background technique [0002] With the rapid development of agriculture and industry, a large amount of waste water has caused great harm to the natural environment and human body. Wastewater rich in high concentrations of organic matter has many sources and a large amount of discharge. Untreated or incompletely treated wastewater will cause great harm to the environment. Photocatalytic reduction is one of the effective methods to remove organic pollutants, especially the technology of visible light removal of organic pollutants is more common. Among them, titanium dioxide has been widely used in the photocatalytic degradation of organic pollutants due to its non-biological toxicity, relatively low price, and high cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/76B01J29/14B01J29/072C02F1/30C02F101/38
CPCY02W10/37
Inventor 刘敏敏于水利
Owner TONGJI UNIV
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