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Preparation method and application of SnS2 quantum dot/Sn3O4 nanosheet composite catalyst

A composite catalyst and nanosheet technology, used in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc. To achieve the effect of increasing active reaction sites and specific surface area, improving utilization efficiency, and high visible light absorption performance

Pending Publication Date: 2022-07-29
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the small size of quantum dot materials is easy to agglomerate and the inherent low separation efficiency of photogenerated carriers is an important factor affecting its industrial application.

Method used

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  • Preparation method and application of SnS2 quantum dot/Sn3O4 nanosheet composite catalyst
  • Preparation method and application of SnS2 quantum dot/Sn3O4 nanosheet composite catalyst
  • Preparation method and application of SnS2 quantum dot/Sn3O4 nanosheet composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 0.4201g Sn 3 O 4 The nanoflowers were dispersed in 50 mL of absolute ethanol, the stirring time was 1-3h, and the cumulative ultrasonic time was 2-4h. After each ultrasonic wave for 30 minutes, the interval was 10 minutes before ultrasonic wave, and the ultrasonic power was 300-500 W until obtaining Sn 3 O 4 Nanosheet dispersion. Among them, Sn 3 O 4 The preparation method of nanoflowers is SnCl 2 .2H 2 O was dissolved in deionized water, to which was added Na 3 CA, adjusted pH to 5-6 with NaOH solution, transferred to the reaction kettle for hydrothermal reaction at 180°C for 8h, after the reaction, the precipitate was centrifuged, washed and dried to obtain Sn 3 O 4 Nano flower.

[0036] (2) Measure 30 mL of ethanol into a beaker, then add 0.1056 g of anhydrous tin tetrachloride and 0.0609 g of thioacetamide, stir to dissolve it completely, and obtain SnCl 4 and TAA in ethanol.

[0037] (3) Sn obtained in step (1) 3 O 4 The nanosheet dispersion...

Embodiment 2

[0042] (1) Weigh 2.1007g Sn 3 O 4 The nanoflowers were dispersed into 60 mL of absolute ethanol, the stirring time was 1-3h, and the cumulative ultrasonic time was 2-4h. After each ultrasonic wave for 30 minutes, the interval was 10 minutes before ultrasonic wave, and the ultrasonic power was 300-500 W until obtaining Sn 3 O 4 Nanosheet dispersion. Among them, Sn 3 O 4 The preparation method of nanoflowers is SnCl 2 .2H 2 O was dissolved in deionized water, to which was added Na 3 CA, adjusted pH to 5-6 with NaOH solution, transferred to the reaction kettle for hydrothermal reaction at 180°C for 8h, after the reaction, the precipitate was centrifuged, washed and dried to obtain Sn 3 O 4 Nano flower.

[0043] (2) Put 60 mL of ethanol into a beaker, then add 0.7482 g of anhydrous tin tetrachloride and 0.4315 g of thioacetamide, stir to dissolve it completely, and obtain SnCl 4 and TAA in ethanol.

[0044] (3) Sn obtained in step (1) 3 O 4 The nanosheet dispersion w...

Embodiment 3

[0048] (1) Weigh 4.2013g Sn 3 O 4 The nanoflowers were dispersed into 120 mL of absolute ethanol, the stirring time was 1-3h, and the cumulative ultrasonic time was 2-4h. After each ultrasonic wave for 30 minutes, the interval was 10 minutes before ultrasonication. The ultrasonic power was 300-500 W until the Sn 3 O 4 Nanosheet dispersion. Among them, Sn 3 O 4 The preparation method of nanoflowers is SnCl 2 .2H 2 O was dissolved in deionized water, to which was added Na 3 CA, adjusted pH to 5-6 with NaOH solution, transferred to the reaction kettle for hydrothermal reaction at 180°C for 8h, after the reaction, the precipitate was centrifuged, washed and dried to obtain Sn 3 O 4 Nano flower.

[0049] (2) Put 120 mL of ethanol into a beaker, then add 1.9951 g of anhydrous tin tetrachloride and 1.1508 g of thioacetamide, stir to dissolve it completely, and obtain SnCl 4 and TAA in ethanol.

[0050] (3) Sn obtained in step (1) 3 O 4 The nanosheet dispersion was slowly ...

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Abstract

The invention discloses a preparation method and application of a SnS2 quantum dot / Sn3O4 nanosheet composite catalyst. The preparation method comprises the following steps: firstly stripping Sn3O4 nanoflowers into a dispersion liquid of Sn3O4 nanosheets by a liquid phase stripping method, then preparing a SnS2 precursor solution, then dropwise adding the dispersion liquid of the Sn3O4 nanosheets into the SnS2 precursor solution, and obtaining the SnS2 quantum dot / Sn3O4 nanosheet composite structure material by an in-situ hydrothermal growth method. And the photocatalyst is used as a photocatalyst for removing harmful MO dye and toxic and harmful heavy metal Cr (VI) ions in a water body under visible light. The SnS2 quantum dots grow on the Sn3O4 nanosheets, so that the SnS2 quantum dots can be uniformly loaded on the surfaces of the Sn3O4 nanosheets, a tight contact interface is formed to improve separation of photo-generated charges, agglomeration of the SnS2 quantum dots is reduced, and the specific surface area and active sites of the composite structure are increased; meanwhile, the light absorption performance can be improved by utilizing the synergistic effect between the SnS2 quantum dot and the Sn3O4 nanosheet, so that the photocatalytic activity of the SnS2 quantum dot / Sn3O4 nanosheet composite structure material is greatly improved, and the SnS2 quantum dot / Sn3O4 nanosheet composite structure material has a great industrial application prospect.

Description

technical field [0001] The invention belongs to the field of water environment protection, relates to the preparation of an inorganic nano-composite catalyst for water environment protection, and in particular relates to a SnS 2 Quantum dot / Sn 3 O 4 Preparation method and application of nanosheet composite catalyst. [0002] Background of the Invention [0003] With the continuous development and expansion of the industry, the problem of water pollution caused by it is becoming more and more serious. A large number of pollutants, such as organic dyes, heavy metal ions, antibiotics, etc., are continuously detected in the water environment, which is a serious threat. Therefore, how to efficiently and greenly remove water pollutants is a key issue for obtaining clear water and sustainable human development. Photocatalytic redox technology is a green, environmentally friendly and most promising water pollutant removal technology. In the photocatalytic process, the photocatalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/22C02F101/30
CPCB01J27/04C02F1/30C02F2101/308C02F2101/22C02F2101/40C02F2305/10B01J35/39
Inventor 徐海青王健李爱平洪坤李进吴彬王金权刘雪梅朱秀芳郭探杨勇
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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