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Preparation method of bi3o4br single crystal nano ring photocatalytic material with square hole structure

A single-crystal nanometer and catalytic material technology, applied in the field of nanomaterials and solar photocatalysis, to achieve the effect of high photocatalytic activity

Inactive Publication Date: 2019-09-10
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the square pore structure Bi with higher photocatalytic activity 3 o 4 Br single crystal nano ring material has not been reported at home and abroad so far

Method used

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  • Preparation method of bi3o4br single crystal nano ring photocatalytic material with square hole structure
  • Preparation method of bi3o4br single crystal nano ring photocatalytic material with square hole structure
  • Preparation method of bi3o4br single crystal nano ring photocatalytic material with square hole structure

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Experimental program
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Effect test

Embodiment 1

[0039] A square hole structure Bi 3 o 4 The preparation method of Br single crystal nano ring photocatalytic material, the steps are as follows:

[0040] 1) Weigh 1.5mmol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) be dissolved in 7.5mL acetic acid, constantly stir to obtain solution A after bismuth nitrate dissolves completely;

[0041] 2) Add the above solution A into 60mL methanol, add 1.5mmol NaBr and 0.6g PEI, and stir to obtain solution B;

[0042] 3) Transfer the above solution B to a polytetrafluoroethylene-lined reactor, and react at a constant temperature at 100°C for 2 hours;

[0043] 4) After the reaction, wash the obtained precipitate with deionized water and absolute ethanol for 3-4 times respectively, and then dry the product in an oven at 60°C to obtain a square hole Bi 3 o 4 Br single crystal nano-ring photocatalytic material, the XRD pattern is as follows figure 1 As shown, the SEM image as figure 2 As shown, the UV-visible solid diffuse refl...

Embodiment 2

[0045] A square hole structure Bi 3 o 4 The preparation method of Br single crystal nano ring photocatalytic material, the steps are as follows:

[0046] 1) Weigh 1mmol bismuth citrate (Bi(C 5 h 7 o 5 COO) 3 ) was dissolved in 7mL formic acid, and was continuously stirred to obtain solution A after bismuth citrate was completely dissolved;

[0047] 2) Add the above solution A into 60mL methanol, add 1mmol CTAB and 0.6g PVP, and stir to obtain solution B;

[0048] 3) Transfer the above solution B to a polytetrafluoroethylene-lined reactor, and react at a constant temperature of 180°C for 5 hours;

[0049] 4) After the reaction, wash the obtained precipitate with deionized water and absolute ethanol for 3-4 times respectively, and then dry the product in an oven at 60°C to obtain a square hole Bi 3 o 4 Br single crystal nanoring photocatalytic materials. XRD patterns such as Figure 7 As shown, the SEM image as Figure 8 As shown, the crystallinity is good, there are ...

Embodiment 3

[0051] A square hole structure Bi 3 o 4 The preparation method of Br single crystal nano ring photocatalytic material, the steps are as follows:

[0052] 1) Weigh 1.3mmol bismuth sulfate (Bi 2 (SO 4 ) 3 ) was dissolved in 7.5mL acetic acid, and was continuously stirred to obtain solution A after bismuth sulfate was completely dissolved;

[0053] 2) Add the above solution A to 45mL of absolute ethanol, add 1.3mmol NaBr and 0.6g PVP, and stir to obtain solution B;

[0054] 3) Transfer the above solution B to a polytetrafluoroethylene-lined reactor, and react at a constant temperature of 150°C for 5 hours;

[0055] 4) After the reaction, wash the obtained precipitate with deionized water and absolute ethanol for 3-4 times respectively, and then dry the product in an oven at 60°C to obtain a square hole Bi 3 o 4 Br single crystal nanoring photocatalytic materials. XRD patterns such as Figure 9 As shown, the SEM image as Figure 10 As shown, the crystallinity is good, th...

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Abstract

The invention discloses a square hole-shaped structure Bi 3 O 4 Preparation method of Br single crystal nanoring photocatalytic material. Using soluble bismuth salts and bromine-containing compounds as the main raw materials, Bi with a square pore structure was prepared by solvothermal method through the control of two surfactants. 3 O 4 Br single crystal nanoring photocatalytic material. Scanning electron microscopy image shows the synthesized square pore-like structure Bi 3 O 4 The microstructure of the Br single crystal nanoring is a multi-layer Bi 3 O 4 A relatively regular square hole-like structure formed by the accumulation of Br sheets. The square hole structure Bi prepared by the present invention 3 O 4 The Br single crystal nanoring photocatalytic material can absorb visible light well, and has shown high photocatalytic activity in experiments that simulate visible light oxygen production and degradation of salicylic acid and methyl orange. The square hole structure Bi synthesized by the present invention 3 O 4 The method of Br single crystal nanoring photocatalytic material is simple, the synthesis conditions are mild, and it is conducive to large-scale industrial production.

Description

technical field [0001] The invention relates to the field of nanomaterials and solar photocatalysis, in particular to a square hole structure Bi 3 o 4 Preparation method of Br single crystal nano ring photocatalytic material. Background technique [0002] Bi 3 o 4 Due to its unique optical and electrical properties, Br nanomaterials have been widely used in the field of photocatalysis as a new type of semiconductor material. [0003] However, in recent years, little has been written about Bi 3 o 4 A report on the growth of Br nanostructures. The ones that have been reported mainly include one-dimensional nanobelts, two-dimensional nanosheets and nanodisks. Among them, Li Yadong's research group used the surfactant CTAB as the bromine source, and synthesized nanoribbon-shaped Bi by controlling the pH value and reaction temperature of the system by hydrothermal method. 24 o 31 Br 10 、 Bi 3 o 4 Br, Bi 12 o 17 Br 2 [Yadong Li et al.Chem.Eur.J. 2005,11,6519-6524]; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06
CPCB01J27/06B01J35/39
Inventor 胡军成熊旭阳刘修凡
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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