Preparation method of nanometer cu2o/ag/tio2-iron modified zeolite composite photocatalyst

A composite light and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve problems such as difficult separation, improve efficiency and have good application prospects , the effect of 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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  • Preparation method of nanometer cu2o/ag/tio2-iron modified zeolite composite photocatalyst

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Comparison scheme
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Embodiment 1

[0025] Nano-Cu in this embodiment 2 O / Ag / TiO 2 -The preparation method of iron-modified zeolite composite photocatalyst, specifically comprises the following steps:

[0026] (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;

[0027] (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;

[0028] (3) subjecting the mixed gel to crystallization treatment, and after the crystallization is completed, the intermediate is obtained through separation, washing and drying;

[0029] (4) The intermediate is fully mixed with 50 mL of 4mol / L ferric chloride solution, after separation, washing and drying, and then calcined at high temperature to obtain the described nano-Cu 2 O / Ag / TiO 2 - Iron-modified zeolite composite photocatalyst.

[0030] In step (1), the amount of zeolite added in the alkali solution is: 0.0...

Embodiment 2

[0036] Nano-Cu in this embodiment 2 O / Ag / TiO 2 -The preparation method of iron-modified zeolite composite photocatalyst, specifically comprises the following steps:

[0037] (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;

[0038] (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;

[0039] (3) subjecting the mixed gel to crystallization treatment, and after the crystallization is completed, the intermediate is obtained through separation, washing and drying;

[0040] (4) The intermediate is fully mixed with 100mL of 5mol / L ferric nitrate solution, separated, washed and dried, and then calcined at high temperature to obtain the nano-Cu 2 O / Ag / TiO 2 - Iron-modified zeolite composite photocatalyst.

[0041] In step (1), the amount of zeolite added in the alkali solution is: 0.008g of zeolite is...

Embodiment 3

[0046]Nano-Cu in this embodiment 2 O / Ag / TiO 2 -The preparation method of iron-modified zeolite composite photocatalyst, specifically comprises the following steps:

[0047] (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;

[0048] (2) Nano-Cu 2 O, Ag and TiO 2 Add to the zeolite precursor and mix thoroughly to make a mixed gel;

[0049] (3) subjecting the mixed gel to crystallization treatment, and after the crystallization is completed, the intermediate is obtained through separation, washing and drying;

[0050] (4) The intermediate is fully mixed with the iron salt solution, separated, washed and dried, and then calcined at a high temperature to obtain the nano-Cu 2 O / Ag / TiO 2 - Iron-modified zeolite composite photocatalyst.

[0051] In step (1), the molar ratio of silicon source, aluminum source and alkali solution is 1:2:200. The silicon source is silica...

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Abstract

The invention relates to a preparation method of a nanometer Cu2O / Ag / TiO2-iron-modified zeolite composite photocatalyst. The preparation method comprises (1) adding a silicon source and an aluminum source into an alkali solution, and fully mixing the materials to obtain a zeolite precursor at a certain temperature, (2) adding nanometer Cu2O, Ag and TiO2 into the zeolite precursor and carrying out full mixing to obtain mixed gel, (3) carrying out crystallization on the mixed gel, and carrying out separation, washing and drying after crystallization to obtain an intermediate, and (4) fully mixing the product and an iron salt solution, carrying out separation, washing and drying, and carrying out high temperature calcining to obtain the nanometer Cu2O / Ag / TiO2-iron-modified zeolite composite photocatalyst. Compared with the prior art, the preparation method has simple processes, high flexibility and a large adjustable range of a silicon-aluminum ratio, effectively improves the efficiency of photocatalytic degradation of organic pollutants, and has a good application prospect.

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 -The preparation method of iron-modified 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C02F1/30C02F101/30
CPCY02W10/37
Inventor 刘敏敏于水利
Owner TONGJI UNIV
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