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a kind of cuins 2 Quantum dot/bioi composite photocatalyst and its preparation method and application

A photocatalyst, cuins2 technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor stability, limited application, difficult recovery, etc., achieve good contact, easy operation, and improved The effect of effective contact

Active Publication Date: 2022-05-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the help of modification, CuInS 2 The photocatalytic performance of quantum dots was further improved, but in CuInS 2 During the modification process of quantum dots, there are problems such as poor stability, easy to fall off, difficult to recycle, etc., which limit its application in photocatalytic technology

Method used

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  • a kind of cuins <sub>2</sub> Quantum dot/bioi composite photocatalyst and its preparation method and application
  • a kind of cuins <sub>2</sub> Quantum dot/bioi composite photocatalyst and its preparation method and application
  • a kind of cuins <sub>2</sub> Quantum dot/bioi composite photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) CuInS 2 Preparation of quantum dot photocatalyst:

[0029] Put 0.17g of copper chloride dihydrate and 20mL of ethylenediamine into a small beaker, dissolve them all, add 0.22g of indium chloride and 0.24g of L-cysteine, add 20ml of deionized water and magnetically stir to assist the reaction 30min; Pour into a high-pressure reaction kettle and heat at 180°C for 12h in a blast drying oven, take it out and let it cool naturally, centrifuge, wash with deionized water and ethanol three times each, put it into a blast drying oven to dry, and obtain CuInS 2 Quantum dot photocatalyst.

[0030] (2) CuInS 2 Preparation of quantum dot-supported BiOI composite photocatalyst:

[0031] Weigh 0.485mg of bismuth nitrate and 0.166g of potassium iodide into a small beaker, respectively, add 20ml of absolute ethanol, 30ml of deionized water, stir magnetically until completely dissolved, then mix the above two solutions, and then add 0.025g of step (1 ) CuInS prepared in2 Quantum ...

Embodiment 2

[0034] (1) CuInS 2 Preparation of quantum dot photocatalyst:

[0035] Put 0.17g of copper chloride dihydrate and 20mL of ethylenediamine into a small beaker, dissolve them all, add 0.22g of indium chloride and 0.24g of L-cysteine, add 20ml of deionized water and magnetically stir to assist the reaction 30min; Pour into a high-pressure reaction kettle and heat at 200°C for 18h in a blast drying oven, take it out and let it cool naturally, then centrifuge, wash with deionized water and ethanol three times each, put it into a blast drying oven to dry, and obtain CuInS 2 Quantum dot photocatalyst.

[0036] (2) CuInS 2 Preparation of quantum dot-supported BiOI composite photocatalyst:

[0037] Weigh 0.485mg of bismuth nitrate and 0.166g of potassium iodide into a small beaker, respectively, add 20ml of absolute ethanol, 20ml of deionized water, stir magnetically until completely dissolved, and then mix the above two solutions. Then add 0.05g of CuInS 2 The quantum dots were fu...

Embodiment 3

[0043] (1) CuInS 2 Preparation of quantum dot photocatalyst:

[0044] Put 0.17g of copper chloride dihydrate and 30mL of ethylenediamine into a small beaker, dissolve them all, add 0.22g of indium chloride and 0.24g of L-cysteine, add 30ml of deionized water and magnetically stir to assist the reaction 30min; Pour into a high-pressure reaction kettle and heat at 190°C for 15h in a blast drying oven, take it out and let it cool naturally, centrifuge, wash with deionized water and ethanol three times each, put it into a blast drying oven to dry, and obtain CuInS 2 Quantum dot photocatalyst.

[0045] (2) CuInS 2 Preparation of quantum dot-supported BiOI composite photocatalyst:

[0046] Weigh 0.485mg of bismuth nitrate and 0.166g of potassium iodide into a small beaker, respectively, add 20ml of absolute ethanol, 40ml of deionized water, stir magnetically until completely dissolved, and then mix the above two solutions. Then add 0.1g of CuInS 2 After the quantum dots were fu...

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PUM

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Abstract

The invention belongs to the technical field of environmental material preparation, in particular to a CuInS 2 Quantum dot / BiOI composite photocatalyst and its preparation method and application. In the present invention, CuInS 2 Quantum dots and BiOI loading form CuInS 2 The quantum dot / BiOI heterojunction greatly reduces the recombination efficiency of electrons and greatly enhances the photoresponse ability of the catalyst. Compared with pure CuInS 2 Quantum dot photocatalysts have superior photocatalytic activity and higher recovery. Prepared CuInS 2 The quantum dot / BiOI composite photocatalyst has good stability, can efficiently degrade tetracycline wastewater, will not cause waste of resources and the formation of additional pollution, and is easy to operate. It is a green and efficient treatment technology.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to a CuInS 2 Quantum dot / BiOI composite photocatalyst and its preparation method and application. Background technique [0002] Tetracyclines (TCs) are among the most widely used antibiotics in aquaculture and veterinary medicine. Due to the poor absorption of tetracycline, most of them are excreted through the metabolic system as unmetabolized parent compounds, causing pollution to soil and water through different channels. In recent years, evidence shows that tetracycline is partially removed in sewage treatment plants (STP), but there are still a large number of residues in water, soil and other media, and even detected in drinking water. The overspending of tetracycline and other antibiotics has caused many serious cases. Problems, including interference with photosynthesis of aquatic plants and metabolism of microbial communities. and have potentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/125B01J37/10B01J37/08C02F1/30C02F101/38C02F101/34
CPCB01J27/125B01J35/004B01J37/10B01J37/08C02F1/30C02F2101/38C02F2101/34C02F2305/10Y02W10/37
Inventor 门秋月汪涛马长畅刘锡清王文娟闫永胜杨丽丽霍鹏伟
Owner JIANGSU UNIV
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