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CQDs/P photocatalysis composite material and preparation method and application

A composite material and photocatalytic technology, which is applied in the field of CQDs/P photocatalytic composite materials and their preparation, can solve the problems of few active sites for surface catalytic reactions, easy recombination of photogenerated currents, and large particle size, and achieves improved photocatalytic performance. Efficiency, suppression of recombination of electrons and holes, effect of simple preparation method

Active Publication Date: 2019-03-12
ZHENGZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of commercial red phosphorus are also extremely obvious, such as its larger particle size, fewer active sites for catalytic reactions on the surface, and the photogenerated current is easy to recombine, resulting in a lower quantum yield.

Method used

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  • CQDs/P photocatalysis composite material and preparation method and application
  • CQDs/P photocatalysis composite material and preparation method and application
  • CQDs/P photocatalysis composite material and preparation method and application

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preparation example Construction

[0026] The preparation method of the above-mentioned CQDs / P photocatalytic composite material comprises the following steps:

[0027] 1) Prepare carbon quantum dot solids by hydrothermal treatment with pollen as raw material, and then add water to make carbon quantum dot solution;

[0028] 2) Red phosphorus with mesoporous structure was prepared by crystal growth hydrothermal method, and red phosphorus with deionized water was mixed and hydrothermally treated to obtain red phosphorus with mesoporous structure;

[0029] 3) Dissolve the product obtained in step 2) in the carbon quantum dot solution, add polyvinylpyrrolidone (PVP), and stir the mixture at room temperature;

[0030] 4) The product in step 3) was washed with distilled water and dried in an oven to obtain the CQDs / P composite.

[0031] The specific steps for preparing the carbon quantum dot solution in step 1) are: mixing pollen with deionized water, transferring the mixture to a reactor for hydrothermal reaction a...

Embodiment 1

[0040] A CQDs / P photocatalytic composite material is composed of flake red phosphorus and carbon quantum dots. The red phosphorus has a mesoporous structure, the carbon quantum dots are distributed on the surface of the red phosphorus, and the red phosphorus exists in the form of a monoclinic phase.

[0041] The preparation method of CQDs / P photocatalytic composite material comprises the following steps:

[0042] S1. Using pollen as a raw material to prepare carbon quantum dot solids through hydrothermal treatment, and then add deionized water to form a carbon quantum dot solution;

[0043] Specifically: 1 g of pollen was mixed with 40 mL of water under ultrasonic conditions, and after stirring for 6 minutes, the mixture was transferred to a reaction kettle and sealed, heated at 150 °C for 12 hours, and naturally cooled to room temperature. The resulting suspension was dried in a freeze dryer to obtain a solid, which was prepared into a carbon dot solution with a concentration...

Embodiment 2

[0049] A CQDs / P photocatalytic composite material is composed of flake red phosphorus and carbon quantum dots. The red phosphorus has a mesoporous structure, the carbon quantum dots are distributed on the surface of the red phosphorus, and the red phosphorus exists in the form of a monoclinic phase.

[0050] The preparation method of CQDs / P photocatalytic composite material comprises the following steps:

[0051] S1. Using pollen as a raw material to prepare carbon quantum dot solids through hydrothermal treatment, and then add deionized water to form a carbon quantum dot solution;

[0052] Specifically: 2 g of pollen was mixed with 80 mL of water under ultrasonic conditions. After stirring for 7 minutes, the mixture was transferred to a reaction kettle, sealed, heated at 160 °C for 20 hours, and cooled to room temperature naturally. The resulting suspension was dried in a freeze dryer to obtain a solid, which was prepared into a carbon dot solution with a concentration of 8 m...

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Abstract

The invention discloses a CQDs / P photocatalysis composite material. The CQDs / P photocatalysis composite material consists of flaky red phosphor and CQDs, wherein the red phosphor is of a mesoporous structure; the CQDs are distributed at the surface of the red phosphor; the red phosphor exists in a monoclinic phase form. The CQDs / P photocatalysis composite material has the advantages that during visible light photocatalysis reaction, the compounding of electrons and cavities can be effectively inhibited, and the visible light photocatalysis efficiency of the catalyst is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials and visible light catalysis, and in particular relates to a CQDs / P photocatalytic composite material and its preparation method and application. Background technique [0002] Facing the increasingly serious environmental pollution and energy crisis, it is urgent to find new ways to solve this problem related to human survival and development. Among them, the gradually developed semiconductor photocatalysis technology provides a new research direction for us to solve this series of problems. Certain metal oxides, sulfides, nitrides, phosphides and their complexes can take on this "heavy task". These compounds can efficiently degrade many organic pollutants through oxidation reactions. However, most of the components of this type of photocatalyst with good performance contain expensive rare metals, which makes it difficult to achieve large-scale production and application. Therefor...

Claims

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Application Information

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IPC IPC(8): B01J27/14B01J37/10C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/14B01J37/10C02F2305/10C02F2101/308C02F2101/34C02F2101/38C02F2101/40B01J35/23B01J35/39
Inventor 陈建军李永宇孙海杰王鑫陈燕敏
Owner ZHENGZHOU NORMAL UNIV
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