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Method for efficiently degrading organic pollutants by using WSe2 nano-sheets piezoelectric catalyst

A technology of organic pollutants and nanosheets, applied in water pollutants, chemical instruments and methods, electrochemical water/sewage treatment, etc., can solve the problems of fast degradation speed, cumbersome operation, good degradation effect, etc., and solve the problems of cumbersome operation. , good degradation effect, high catalytic efficiency

Inactive Publication Date: 2019-07-05
夸克能源工程实验室(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of complicated operation, fast degradation speed and good degradation effect of the prior art, the present invention provides a piezoelectric catalytic technology for degrading pollutants by WSe2 nanosheets with high catalytic activity, which is simple and easy to implement and is conducive to large-scale promotion.

Method used

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  • Method for efficiently degrading organic pollutants by using WSe2 nano-sheets piezoelectric catalyst

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Embodiment 1

[0031] A WSe 2 A method for efficiently degrading organic pollutants with a nanosheet piezoelectric catalyst, the steps are as follows:

[0032] Step (1): Preparation of WSe 2 Nano sheet (catalyst), concrete steps are as follows:

[0033] a. On a molar basis, weigh 7.5m mol of tungsten hexacarbonyl (W(CO) 6 ), 14.5mmol of selenium powder (Se); 470 to 480 parts of anhydrous p-xylene;

[0034] b. Will W(CO) 6 , Add Se powder into a 100mL beaker filled with 50mL of anhydrous p-xylene;

[0035] c. Place the beaker on a magnetic stirrer and stir for 30 minutes until the solute is completely dispersed;

[0036] d. Put the stirred solution into the polytetrafluoroethylene lining of the autoclave, put the lining into a 100mL autoclave, and heat it with water at 250°C for 24 hours;

[0037] e. After cooling to room temperature, centrifuge and wash with distilled water and ethanol for more than three times, and dry in vacuum to obtain a black product, which is WSe 2 Nanosheets. ...

Embodiment 2

[0048] Compared with embodiment 1, the step (1) of embodiment 2 is exactly the same, and the difference is only in steps (2)~(4), specifically as follows:

[0049] Step (2) takes 10mg of WSe 2 Nanosheets (catalyst) were put into a beaker (200mL beaker) filled with 100mL tetracycline solution (the concentration of tetracycline was 1.0×10 -5 mol / L);

[0050] Step (3): will join WSe 2 The solution of the nanosheets was first stirred in the dark for 1 hour, so that the tetracycline reached adsorption / desorption equilibrium (dark reaction) on the catalyst surface;

[0051] Step (4): Ultrasonic irradiation is applied to ultrasonically degrade the solution, and an appropriate amount of ice cubes are added at the same time to keep the temperature of the organic wastewater at about 25°C.

[0052] Experiment 2:

[0053] Operate according to the above steps (1)-(3), prepare two steps and add WSe 2 The tetracycline solution after the dark reaction of the nanosheets; one part (100mL) ...

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Abstract

The invention discloses a method for efficiently degrading organic pollutants by using WSe2 nano-sheets piezoelectric catalyst, which comprises the following steps: (1) adding a certain amount of WSe2nano-sheets into wastewater containing organic pollutants; (2) carrying out light-shielding stirring on the wastewater added with the WSe2 nano-sheets, so that the organic pollutants reach adsorption / desorption balance on the surface of the WSe2 nano-sheets; (3) applying ultrasonic irradiation, and carrying out ultrasonic degradation on a solution. According to the method, the WSe2 nano-sheets are synthesized by a hydrothermal method, a dark reaction is carried out first, so that the organic pollutants reach the adsorption / desorption balance on the surface of the catalyst; then under the action of ultrasonic waves, the catalyst WSe2 nano-sheets convert the mechanical energy of the ultrasonic waves into chemical energy, so that the decomposition of the organic pollutants is efficiently catalyzed. The method has the advantages of simple and easy operation, high catalytic efficiency and contribution to large-scale popularization, thereby effectively solving the problems of complex operation, high degradation speed, good degradation effect and the like in the prior art, and having good application value.

Description

technical field [0001] The invention relates to the technical field of novel piezoelectric catalysts for degrading organic pollutants, in particular to a WSe 2 Nanosheet Piezoelectric Catalyst for Efficient Degradation of Organic Pollutants. Background technique [0002] With the growth of the world economy, the problem of environmental pollution has attracted extensive attention of researchers. Human beings discharge various organic pollutants into nature during production activities, such as levofloxacin, oxytetracycline hydrochloride, tetracycline, bisphenol A and cephalosporin, etc. These organic pollutants have good stability under natural conditions, are difficult to degrade, and are seriously toxic to the human body, seriously endangering people's lives and safety. Therefore, it is imminent to find a technology that can efficiently degrade such organic pollutants. At present, there are some studies on the degradation methods of organic pollutants in water bodies, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/36C02F101/30
CPCC02F1/46C02F1/36C02F2101/30
Inventor 蔡峰赵大伟于洪涛谌佳佳黄家剑谢长彪
Owner 夸克能源工程实验室(深圳)有限公司
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