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Hollow porous microspherical biocl photocatalytic material assembled by nanocrystals and preparation method thereof

A technology of photocatalytic materials and nanocrystals, which is applied in the field of nanocomposite materials and photocatalysis, can solve problems such as complex reaction systems, long preparation cycles, and slow reaction speeds, and achieve high photocatalytic activity, low density, and increased speed.

Active Publication Date: 2021-04-20
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystals and a preparation method to solve the problem that the existing solution combustion synthesis reaction system still has a complex reaction system, slow reaction speed, high cost, and long preparation period. long question

Method used

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  • Hollow porous microspherical biocl photocatalytic material assembled by nanocrystals and preparation method thereof
  • Hollow porous microspherical biocl photocatalytic material assembled by nanocrystals and preparation method thereof
  • Hollow porous microspherical biocl photocatalytic material assembled by nanocrystals and preparation method thereof

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preparation example Construction

[0020] A method for preparing a hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystals, comprising the following steps:

[0021] (1) Configuration solution: Add 1.94-2.91g of Bi(NO 3 ) 3 ·5H 2 O, 0.6~1g of C 4 h 6 o 6 , 0.3~0.5g of C 2 h 5 NO 2 and 0.107~0.321g of NH 4 Cl, mixed into a homogeneous clear solution;

[0022] (2) Transfer the solution prepared in step (1) to an ultrasonic sprayer, and spray it into a preheated tube furnace through the ultrasonic sprayer. The furnace temperature is 500-700°C. The entire reaction is carried out in an air atmosphere The reaction time is 30-100 minutes; after the reaction is completed, it is cooled to room temperature with the furnace, and the obtained powder is collected as the BiOCl photocatalytic material.

Embodiment 1

[0024] Embodiment 1: This embodiment provides a kind of hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystal, figure 2 For the SEM figure of the hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystals prepared by the present invention, wherein, figure 2 (a) and figure 2 (d) is the concrete SEM figure of embodiment 1.

[0025] image 3 It is the TEM image of the hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystals prepared by the present invention, wherein Figure (a), Figure (b) and Figure (c) are specific TEM images of Example 1.

[0026] Table 1 is the BET and porediameter table of the hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystals prepared in the present invention.

[0027] Table 1

[0028]

[0029] The preparation method of this catalyst comprises the following steps:

[0030] Take 2.91g of Bi(NO 3 ) 3 ·5H 2 O, 0.214 g of NH 4 Cl, ...

Embodiment 2

[0031] Embodiment 2: This embodiment provides a kind of hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystal, the preparation method of this catalyst comprises the following steps:

[0032] Take 2.91g of Bi(NO 3 ) 3 ·5H 2 O, 0.321g of NH 4 Cl, 0.6g of C 4 h 6 o 6 , 0.4g of C 2 h 5 NO 2 , dissolve it in 10ml, 4.5mol / L dilute nitric acid solution, stir until a clear and transparent solution, transfer the prepared solution into an ultrasonic nebulizer, and spray the solution into a 600°C tube furnace through the ultrasonic nebulizer to continue the reaction After 90 minutes, the entire reaction was completed in an air atmosphere. After the reaction was completed, it was cooled to room temperature with the furnace, and the obtained powder was collected as hollow porous microspherical BiOCl.

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Abstract

A hollow porous microspherical BiOCl photocatalytic material assembled by nanocrystals and a preparation method thereof belong to the technical field of nanocomposite materials and photocatalysis. The preparation method comprises the following steps: (1) configuring the solution: adding 1.94 to 2.91 g of Bi(NO 3 ) 3 ·5H 2 O, 0.6~1g of C 4 h 6 o 6 , 0.3~0.5g of C 2 h 5 NO 2 and 0.107~0.321g of NH 4 Cl, mixed into a uniform and clear solution; (2) Transfer the solution prepared in step (1) to an ultrasonic sprayer, and spray it into a preheated tube furnace through the ultrasonic sprayer, and the furnace temperature is 500-700°C , the whole reaction is carried out in an air atmosphere, and the reaction time is 30-100 minutes; after the reaction is completed, it is cooled to room temperature with the furnace, and the obtained powder is collected as the BiOCl photocatalytic material. Advantages: the present invention can shorten the reaction time through the combination of ultrasonic spraying and solution combustion method, and obtain hollow porous microspherical BiOCl assembled by nanocrystals with high specific surface area, high photocatalytic activity and not easy to agglomerate, which is beneficial in photocatalysis, water It is widely used in pollution treatment and other fields.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials and photocatalysis, in particular to a hollow porous microspherical BiOCl photocatalyst material assembled by nanocrystals and a preparation method thereof. Background technique [0002] Photocatalytic technology uses solar energy to drive oxidation-reduction reactions, which can degrade organic pollutants into H in a short time. 2 O and CO 2 And other small molecular inorganic substances, will not produce secondary pollution, so it has attracted widespread attention. Recently, BiOCl has been considered as a promising catalyst due to its special layered structure. The layered structure of BiOCl consists of double chlorine atomic layers and [Bi 2 o 2 ] 2+ The layers are formed along the c-axis by van der Waals interaction, which can effectively separate the light-induced charges. [0003] Xie et al. synthesized nanoplate-like and microsphere-like BiOCl by solid-phase chemistry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06C01G29/00B01J35/08
CPCC01G29/00B01J27/06C01P2004/34C01P2004/03C01P2004/04C01P2006/12C01P2006/16C01P2002/72B01J35/51B01J35/39
Inventor 王晓虹杨忠翔商智超李周俊任宣儒张保敬沈承金
Owner CHINA UNIV OF MINING & TECH
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