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Preparation and application of CdSe/BiOCl-based composite photocatalyst

A photocatalyst and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as limiting the effective development of photocatalytic performance, and achieve uniform size, separation, and good stability. Effect

Inactive Publication Date: 2018-03-06
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two composite photocatalysts exhibit excellent photocatalytic degradation performance under visible light, BiOCl itself is not excited by visible light, which limits the effective development of its photocatalytic performance.

Method used

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  • Preparation and application of CdSe/BiOCl-based composite photocatalyst
  • Preparation and application of CdSe/BiOCl-based composite photocatalyst
  • Preparation and application of CdSe/BiOCl-based composite photocatalyst

Examples

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Effect test

Embodiment 1

[0035] (1) Preparation of CdSe quantum dots: first weigh 0.4567g cadmium chloride (CdCl 2 2.5H 2 O) put into the there-necked flask, add 200mL deionized water to dissolve fully, and keep logical N 2 After half an hour, 0.341 mL of stabilizer methacrylic acid was added, and after thorough stirring, the pH of the solution was adjusted to 7 with 1 mol / L sodium hydroxide solution. Simultaneously weigh 0.1579g of selenium powder (Se) and 0.75g of sodium borohydride (NaBH 4 ) into a 10mL small beaker, add 7mL deionized water to dissolve completely, and pass N 2 Protect against oxidation, wait until the white precipitate appears and the precipitation is complete, use the dropper to absorb the supernatant liquid, drop by drop into the above three-necked flask solution, and react in a water bath at 80°C for 4 hours, take out the flask to cool naturally, centrifuge the solution, wash with water and alcohol CdSe quantum dots can be obtained after drying in an oven at 60° C. for 6 hour...

Embodiment 2

[0041] (1) Preparation of CdSe quantum dots: first weigh 0.4567g cadmium chloride (CdCl 2 2.5H 2 O) put into the there-necked flask, add 200mL deionized water to dissolve fully, and keep logical N 2 After half an hour, 0.341 mL of stabilizer methacrylic acid was added, and after thorough stirring, the pH of the solution was adjusted to 7 with 1 mol / L sodium hydroxide solution. Simultaneously weigh 0.2369g of selenium powder (Se) and 0.75g of sodium borohydride (NaBH 4 ) into a 10mL small beaker, add 7mL deionized water to dissolve completely, and pass N 2 Protect against oxidation, wait until the white precipitate appears and the precipitation is complete, use the dropper to absorb the supernatant liquid, drop by drop into the above three-necked flask solution, and react in a water bath at 80°C for 4 hours, take out the flask to cool naturally, centrifuge the solution, wash with water and alcohol CdSe quantum dots can be obtained after drying in an oven at 60° C. for 6 hour...

Embodiment 3

[0047] (1) Preparation of CdSe quantum dots: first weigh 0.4567g cadmium chloride (CdCl 2 2.5H 2 O) put into the there-necked flask, add 200mL deionized water to dissolve fully, and keep logical N 2 After half an hour, 0.341 mL of stabilizer methacrylic acid was added, and after thorough stirring, the pH of the solution was adjusted to 7 with 1 mol / L sodium hydroxide solution. Simultaneously weigh 0.3158g of selenium powder (Se) and 0.75g of sodium borohydride (NaBH 4 ) into a 10mL small beaker, add 7mL deionized water to dissolve completely, and pass N 2 Protect against oxidation, wait until the white precipitate appears and the precipitation is complete, use the dropper to absorb the supernatant liquid, drop by drop into the above three-necked flask solution, and react in a water bath at 80°C for 4 hours, take out the flask to cool naturally, centrifuge the solution, wash with water and alcohol CdSe quantum dots can be obtained after drying in an oven at 60° C. for 6 hour...

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Abstract

The invention discloses a preparation method of a CdSe / BiOCl composite photocatalyst, belonging to the technical field of environmental material preparation. The method comprises the following concrete steps: dissolving cadmium chloride and methacrylic acid by using deionized water, stirring, then adjusting a pH value, injecting supernate formed after selenium powder and sodium borohydride are dissolved in deionized water, introducing nitrogen gas, heating, then cooling naturally, centrifugalizing, washing, and drying to obtain CdSe quantum dots; dissolving bismuth nitrate pentahydrate into amannitol solution, dropwise adding a saturated sodium chloride solution, stirring, then pouring the mixture into a reaction kettle, performing hydrothermal reaction, then cooling naturally, centrifugalizing, washing, drying and stoving to obtain BiOCl nanosheets; weighing the prepared CdSe quantum dots and BiOCl nanosheets, mixing and stirring the CdSe quantum dots and the BiOCl nanosheets in a water solution, then centrifugalizing, washing, drying and stoving to obtain the CdSe / BiOCl composite photocatalyst. The photocatalyst has a relatively good shape and stability, and visible light can beeffectively utilized to degrade tetracycline in antibiotic wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to the preparation and application of a composite photocatalyst based on CdSe / BiOCl Background technique [0002] Tetracycline antibiotics have a good effect on the treatment of livestock bacterial diarrhea and respiratory diseases of livestock and poultry, and long-term medication at low concentrations can promote growth, increase egg production and promote milk secretion. However, with the widespread use of this antibiotic, the resistance of bacteria has also increased significantly. In addition, it is easy to cause superinfection, allergic reactions, affect the growth of teeth and bones, and damage the liver. Adverse reactions have directly affected ecology and human health. Therefore, it is an important link to deal with tetracycline residues in life and production reasonably and effectively. Many experts and scholars use physical, chemical and biolog...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F101/38
CPCC02F1/30B01J27/06C02F2101/38B01J35/39
Inventor 黄海马长畅朱志汪涛姚鑫于洋闫永胜
Owner JIANGSU UNIV
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