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Method for preparing ethylenediamine-coated cadmium telluride sulfide nanobelt photocatalyst and separating uranium from radioactive wastewater

A technology for radioactive wastewater and photocatalysts, applied in physical/chemical process catalysts, radioactive purification, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as lack of active adsorption sites

Active Publication Date: 2021-06-15
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for preparing ethylenediamine-coated cadmium telluride sulfide nanobelt photocatalyst and separating uranium from radioactive wastewater
  • Method for preparing ethylenediamine-coated cadmium telluride sulfide nanobelt photocatalyst and separating uranium from radioactive wastewater
  • Method for preparing ethylenediamine-coated cadmium telluride sulfide nanobelt photocatalyst and separating uranium from 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 method for preparing an ethylenediamine-coated cadmium telluride sulfide nanobelt photocatalyst and separating uranium from radioactive wastewater. The method comprises the following step: preparation of a cadmium telluride sulfide nanobelt: adding cadmium chloride into ethylenediamine, conducting uniform stirring, then adding sulfur powder and tellurium powder, continuing uniform stirring, adding hydrazine hydrate, conducting stirring for 25-35 minutes to obtain a mixed solution, transferring the mixed solution into a stainless steel reaction kettle, conducting reacting at 115-125 DEG C for 6-10 hours, conducting centrifuging to collect a product after the reaction is finished, performing washing with pure water and ethanol three times respectively, and carrying out vacuum drying on a final precipitate at 55-65 DEG C to obtain the cadmium telluride sulfide nanobelt photocatalyst. According to the invention, a ethylenediamine-coated cadmium telluride sulfide nanobelt photocatalyst material is prepared, an amino group is provided as an adsorption site, the band gap structure of the cadmium sulfide nanobelt is improved through introduction of tellurium, and the efficient hexavalent uranium photocatalytic reduction catalyst is obtained by balancing modification of the amino groups and the band gap structure on the cadmium telluride sulfide nanobelt.

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 Applications(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 SOUTHWEAT UNIV OF SCI & TECH
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