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Preparation of ethylenediamine-coated cadmium telluride nanobelt photocatalyst and separation method of uranium in radioactive wastewater

A technology of radioactive wastewater and photocatalyst, which is applied in the direction of physical/chemical process catalyst, radioactive purification, organic compound/hydride/coordination complex catalyst, etc., and can solve the problem of lack of active adsorption sites

Active Publication Date: 2022-01-28
四川嵘合新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The purpose of the present invention is to realize the control of amino groups on the surface of cadmium sulfur telluride nanobelts by adding sulfur powder and tellurium powder, and at the same time optimize the bandgap width of cadmium sulfur telluride, realize good photoresponse efficiency, and solve the problem of photocatalytic reduction Lack of active adsorption sites and matching photoresponse bandgap in uranium reactions

Method used

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  • Preparation of ethylenediamine-coated cadmium telluride nanobelt photocatalyst and separation method of uranium in radioactive wastewater
  • Preparation of ethylenediamine-coated cadmium telluride nanobelt photocatalyst and separation method of uranium in radioactive wastewater
  • Preparation of ethylenediamine-coated cadmium telluride nanobelt photocatalyst and separation method of uranium in radioactive wastewater

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Embodiment 1

[0044] A preparation method of ethylenediamine-coated sulfur cadmium telluride nanobelt photocatalyst, comprising the following steps:

[0045] Step 1. Preparation of cadmium sulfide nanobelts: Add 1 mmol of cadmium chloride to 30 mL of ethylenediamine, stir evenly, add a mixture of 1 mmol of sulfur powder and tellurium powder, continue stirring evenly, add 3 mL of hydrazine hydrate, and stir for 30 min to obtain a mixed solution; The mol ratio of described sulfur powder and tellurium powder is 0.95:0.05;

[0046] Step 2. Transfer the mixed solution to a 45mL stainless steel reaction kettle and react at 120°C for 8 hours. After the reaction, the product is collected by centrifugation, washed three times with pure water and ethanol respectively, and the final precipitate is vacuum-dried at 60°C to obtain sulfur Cadmium Telluride Nanoribbon Photocatalyst, CdS 0.95 Te 0.05 -EDA; wherein EDA represents ethylenediamine;

Embodiment 2

[0048] A preparation method of ethylenediamine-coated sulfur cadmium telluride nanobelt photocatalyst, comprising the following steps:

[0049] Step 1. Preparation of cadmium sulfide nanobelts: Add 1 mmol of cadmium chloride to 30 mL of ethylenediamine, stir evenly, add a mixture of 1 mmol of sulfur powder and tellurium powder, continue stirring evenly, add 3 mL of hydrazine hydrate, and stir for 30 min to obtain a mixed solution; The mol ratio of described sulfur powder and tellurium powder is 0.9:0.1;

[0050]Step 2. Transfer the mixed solution to a 45mL stainless steel reaction kettle and react at 120°C for 8 hours. After the reaction, the product is collected by centrifugation, washed three times with pure water and ethanol respectively, and the final precipitate is vacuum-dried at 60°C to obtain sulfur Cadmium telluride nanoribbon photocatalyst; i.e. CdS 0.90 Te 0.1 -EDA.

Embodiment 3

[0052] A preparation method of ethylenediamine-coated sulfur cadmium telluride nanobelt photocatalyst, comprising the following steps:

[0053] Step 1. Preparation of cadmium sulfide nanobelts: Add 1 mmol of cadmium chloride to 30 mL of ethylenediamine, stir evenly, add a mixture of 1 mmol of sulfur powder and tellurium powder, continue stirring evenly, add 3 mL of hydrazine hydrate, and stir for 30 min to obtain a mixed solution; The mol ratio of described sulfur powder and tellurium powder is 0.8:0.2;

[0054] Step 2. Transfer the mixed solution to a 45mL stainless steel reaction kettle and react at 120°C for 8 hours. After the reaction, the product is collected by centrifugation, washed three times with pure water and ethanol respectively, and the final precipitate is vacuum-dried at 60°C to obtain sulfur Cadmium Telluride Nanoribbon Photocatalyst, CdS 0.80 Te 0.2 -EDA.

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Abstract

The invention discloses a preparation of ethylenediamine-coated cadmium telluride nanobelt photocatalyst and a method for separating uranium from radioactive waste water, comprising: preparing the cadmium telluride sulfur nanobelt: adding cadmium chloride to ethylenediamine, After stirring evenly, add sulfur powder and tellurium powder, continue stirring evenly, add hydrazine hydrate, and stir for 25-35 minutes to obtain a mixed solution; transfer the mixed solution to a stainless steel reactor, react at 115-125°C for 6-10 hours, and the reaction is complete Finally, the product is collected by centrifugation, washed three times with pure water and ethanol respectively, and finally the precipitate is vacuum-dried at 55-65° C. to obtain the cadmium sulfur telluride nanobelt photocatalyst. The invention prepares ethylenediamine-coated sulfur cadmium telluride nanobelt photocatalyst material, which provides amino groups as adsorption sites, and the introduction of tellurium improves the bandgap structure of cadmium sulfide nanobelts, by balancing the amino group and the bandgap Structure modification of cadmium telluride nanoribbons yields a highly efficient catalyst for the photocatalytic reduction of hexavalent uranium.

Description

technical field [0001] The invention relates to the technical field of organic and inorganic nanometer materials and their preparation, in particular to a preparation of ethylenediamine-coated sulfur cadmium telluride nanobelt photocatalyst and a method for separating uranium from radioactive waste water. Background technique [0002] Hexavalent uranium, a typical toxic and radioactive ion in radioactive effluents, has been extensively studied from the perspective of resource recovery and environmental protection. The photocatalytic reduction method is able to convert soluble hexavalent uranium ions into insoluble tetravalent uranium ions, which provides high selectivity for non-reducing ions. However, photocatalysts for the reduction of hexavalent uranium have low uranium adsorption capacity and weak light absorption capacity. At present, there are many different methods to optimize the photocatalyst for the reduction of hexavalent uranium. For the photocatalyst with low u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02G21F9/06
CPCB01J31/0254B01J31/0238G21F9/06B01J35/39
Inventor 何嵘竹文坤段涛陈涛董云董昌雪袁鑫廉杰
Owner 四川嵘合新材料科技有限公司
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