A kind of preparation method of bi5o7br nanometer photocatalytic material with ribbon structure

A ribbon structure and catalytic material technology, which is applied in the field of nanomaterials and solar photocatalysis, can solve the problems of product impurity, irregular and uniform microscopic morphology, and achieve the effect of regular and uniform morphology and high photocatalytic activity

Inactive Publication Date: 2019-10-08
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent has defects such as impure products and irregular and uniform microscopic morphology. 5 o 7 Br nanomaterials, this ribbon-shaped Bi 5 o 7 Br nanomaterials have not been reported at home and abroad so far

Method used

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  • A kind of preparation method of bi5o7br nanometer photocatalytic material with ribbon structure
  • A kind of preparation method of bi5o7br nanometer photocatalytic material with ribbon structure
  • A kind of preparation method of bi5o7br nanometer photocatalytic material with ribbon structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Bi with a ribbon structure 5 o 7 The preparation method of Br nanometer photocatalytic material, its step is as follows:

[0037] (1) Weigh 2mmol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) be dissolved in 25ml of anhydrous methanol, constantly stir to obtain solution A after bismuth nitrate dissolves completely;

[0038] (2) Weigh 2mmol CTAB and 0.6g polyvinylpyrrolidone and dissolve them in 25ml of anhydrous methanol, stir well to obtain solution B;

[0039] (3) Add solution A to solution B, stir well to obtain solution C, then slowly add 1mol / L sodium hydroxide solution to solution C, adjust pH=13.10 to obtain solution D;

[0040] (4) Transfer the solution D to a polytetrafluoroethylene-lined reactor, and react at a constant temperature at 180°C for 5 hours;

[0041] (5) After the reaction, the obtained precipitate was first washed 3 times with deionized water, and then washed 4 times with absolute ethanol, and then the product was dried in an oven at 60...

Embodiment 2

[0043] Bi with a ribbon structure 5 o 7 The preparation method of Br nanometer photocatalytic material, its step is as follows:

[0044] (1) Weigh 2mmol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) be dissolved in 30ml dehydrated alcohol, constantly stir to obtain solution A after bismuth nitrate dissolves completely;

[0045] (2) Weigh 2mmol CTAB and 0.8g polyvinylpyrrolidone and dissolve them in 30ml of absolute ethanol, stir well to obtain solution B;

[0046] (3) Add solution A to solution B, stir well to obtain solution C, then slowly add 2 mol / L sodium hydroxide solution to solution C, adjust pH=12.91 to obtain solution D;

[0047] (4) Transfer the solution D to a polytetrafluoroethylene-lined reactor, and react at a constant temperature of 180° C. for 24 hours;

[0048] (5) After the reaction, the obtained precipitate was first washed 5 times with deionized water, then washed 3 times with absolute ethanol, and then the product was dried in a 60°C oven to obt...

Embodiment 3

[0050] Bi with a ribbon structure 5 o 7 The preparation method of Br nanometer photocatalytic material, its step is as follows:

[0051] (1) Weigh 2mmol bismuth sulfate (Bi 2 (SO 4 ) 3 ) was dissolved in 40ml of anhydrous methanol, and was continuously stirred to obtain solution A after bismuth sulfate was completely dissolved;

[0052] (2) Weigh 2mmol potassium bromide and 1.2g polyvinylpyrrolidone and dissolve them in 40ml of anhydrous methanol, stir to obtain solution B;

[0053] (3) Add solution A to solution B, stir well to obtain solution C, then slowly add 1 mol / L potassium hydroxide solution to solution C, adjust pH=13.21 to obtain solution D;

[0054] (4) Transfer the solution D to a polytetrafluoroethylene-lined reactor and react at a constant temperature of 150°C for 12 hours;

[0055] (5) After the reaction, the obtained precipitate was first washed 3 times with deionized water, then washed 3 times with absolute ethanol, and then the product was dried in an o...

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Abstract

The invention belongs to the fields of nanomaterials and solar energy photocatalysis and particularly discloses a preparation method of a strip-structured Bi5O7Br nano-photocatalytic material. The strip-structured Bi5O7Br nano-photocatalytic material is prepared from the mainly raw materials of soluble bismuth salt and a bromine-containing component by virtue of a solvothermal method, is good in crystalline state and high in purity and does not have an obvious impurity phase, and a synthesized Bi5O7Br microstructure displayed by a scanning electron microscope image is of a particularly regular strip structure. The strip-structured Bi5O7Br nano-photocatalytic material prepared by virtue of the preparation method has relatively good visible-light activity and presents high photocatalytic activity in an experiment for simulating visible light degradation of methyl orange. The synthetic method of the strip-structured Bi5O7Br nano-photocatalytic material is simple, simple and convenient to operation and beneficial to large-scale industrial production.

Description

technical field [0001] The invention relates to the field of nanomaterials and solar photocatalysis, in particular to a strip-structured Bi 5 o 7 Preparation method of Br nanometer photocatalytic material. Background technique [0002] Bi x o y Br z Due to their unique optical and electrical properties, nanomaterials have been widely used in the field of photocatalysis as a new type of semiconductor material. [0003] In recent years, there have been many reports about Bi x o y Br z Research reports on synthesis methods and characteristic morphology. The synthesis methods mainly include solid-phase synthesis, hydrothermal method, microwave-assisted method, etc. The characteristic morphology mainly includes one-dimensional nanobelts, nanotubes, two-dimensional nanosheets, and nanodisks. and three-dimensional nanospheres, etc. Among them, Li Yadong's research group used the surfactant CTAB as a chlorine source, and synthesized nanoribbon and tubular BiOBr, Bi 24 o 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/06C02F2305/08C02F2305/10C02F2101/34C02F2101/345C02F2101/40C02F2101/38B01J35/39
Inventor 胡军成刘修凡熊旭阳
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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