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Preparation method of anatase type nano titanium dioxide/bentonite composite material

A technology of nano-titanium dioxide and composite materials, which is applied in the field of photocatalytic material preparation, and can solve problems such as difficult mixing, affecting product phase, and low product purity.

Inactive Publication Date: 2020-11-03
WEIFANG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase method directly mixes and calcines solid-phase titanium dioxide and bentonite in the presence of a fusion agent, and it is difficult to combine TiO 2 Fully mixed with bentonite, the purity of the product is not high, and the high temperature calcination process will also affect the product phase
[0007] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

Method used

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  • Preparation method of anatase type nano titanium dioxide/bentonite composite material
  • Preparation method of anatase type nano titanium dioxide/bentonite composite material
  • Preparation method of anatase type nano titanium dioxide/bentonite composite material

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preparation example Construction

[0031] The invention provides a preparation method of anatase nano titanium dioxide / bentonite composite material, comprising the following steps:

[0032] Step 1 Bentonite crushing

[0033] Crushing the bentonite raw ore and passing through 80-120 mesh sieves to obtain bentonite powder for later use; the bentonite is natural bentonite, and the natural bentonite can be directly activated by acidic titanyl sulfate solution during the reaction process without acid activation treatment alone.

[0034] Step two titanyl sulfate dissolved

[0035] Put 2-6g of titanyl sulfate in 120-180mL of deionized water, fully stir for 6-10 hours to obtain a transparent solution A; using titanyl sulfate as the titanium source is cheap and easy to obtain, and will not produce volatility during use acid, the preparation process is safer; at the same time, the TiO obtained by the dissociation of titanyl sulfate in aqueous solution 2+ Ions are more likely to enter the interlayer and pores of bentoni...

Embodiment 1

[0049] The preparation method of anatase type nano titanium dioxide / bentonite composite material comprises the following steps:

[0050] Step 1 Bentonite crushing

[0051] Crushing the raw ore of bentonite and passing through a sieve of 80-120 meshes to obtain bentonite powder;

[0052] Step two titanyl sulfate dissolved

[0053] Put 3.7g of titanyl sulfate in 141mL of deionized water and stir thoroughly to obtain a transparent solution A;

[0054] Step 3 Preparation of Anatase Nano Titanium Dioxide / Bentonite Composite Material

[0055] Add 42g of the bentonite powder into the transparent solution A and stir evenly to obtain a suspension B;

[0056] Transfer the suspension B to an autoclave for hydrothermal treatment, cool after the hydrothermal treatment is completed, and filter with suction to obtain a precipitate C;

[0057] The precipitate C was washed to a pH of 6, and then suction filtered to obtain a filter cake;

[0058] The filter cake is dried and ground to obta...

Embodiment 2

[0061] The preparation method of anatase type nano titanium dioxide / bentonite composite material comprises the following steps:

[0062] Step 1 Bentonite crushing

[0063] Crushing the raw ore of bentonite and passing through a sieve of 80-120 meshes to obtain bentonite powder;

[0064] Step two titanyl sulfate dissolved

[0065] Put 4.2g of titanyl sulfate in 138mL of deionized water and stir thoroughly to obtain a transparent solution A;

[0066] Step 3 Preparation of Anatase Nano Titanium Dioxide / Bentonite Composite Material

[0067] Add 38g of the bentonite powder into the transparent solution A and stir evenly to obtain a suspension B;

[0068] Transfer the suspension B to an autoclave for hydrothermal treatment, cool after the hydrothermal treatment is completed, and filter with suction to obtain a precipitate C;

[0069] The precipitate C was washed to a pH of 8, and then suction filtered to obtain a filter cake;

[0070] The filter cake is dried and ground to obta...

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Abstract

The invention is applicable to the technical field of preparation of photocatalytic materials, and provides a preparation method of an anatase type nano titanium dioxide / bentonite composite material,which comprises the following steps: pulverizing bentonite, dissolving titanyl sulfate, adding bentonite powder into the dissolved titanyl sulfate, and stirring the mixture uniformly to obtain the anatase type nano titanium dioxide / bentonite composite material. The anatase type nano titanium dioxide / bentonite composite material is prepared by a one-step hydrothermal method. Therefore, the raw materials are cheap and easy to obtain, the preparation process is simple and feasible, no acid, alkali or organic solvent needs to be introduced in the preparation process, the product does not need to be calcined, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of preparation of photocatalytic materials, in particular to a method for preparing an anatase nanometer titanium dioxide / bentonite composite material. Background technique [0002] Titanium dioxide is an important inorganic functional material widely used in photocatalytic treatment of wastewater. As a common heterogeneous photocatalyst, titanium dioxide nanoparticles are easy to agglomerate and difficult to separate in solution, which limits its practical application. Bentonite is a layered non-metallic clay mineral that widely exists in nature. Due to its strong adsorption capacity and ion exchange capacity, it is widely used in the treatment of pollutants in wastewater. Combining TiO2 with bentonite can not only effectively solve the problem of agglomeration and separation of nano-TiO2, but also effectively utilize the adsorption properties of bentonite to increase the photodegradation rate of photocat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/16B01J35/00B01J35/02B01J35/10B01J37/10
CPCB01J21/16B01J21/063B01J37/10B01J35/23B01J35/40B01J35/615B01J35/633B01J35/647B01J35/39
Inventor 闫友军
Owner WEIFANG UNIV OF SCI & TECH