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Preparation method of three-dimensional flower-like Bi12O17Cl2 photocatalyst

A bi12o17cl2, three-dimensional flower-like technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve unreported problems, achieve good safety, low preparation cost, and strong practicability Effect

Active Publication Date: 2020-05-22
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, by preparing the three-dimensional structure of Bi 12 o 17 Cl 2 It is of great significance to the research and development of new non-stoichiometric ratio bismuth oxyhalide-based photocatalysts, but it has not been reported so far

Method used

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  • Preparation method of three-dimensional flower-like Bi12O17Cl2 photocatalyst
  • Preparation method of three-dimensional flower-like Bi12O17Cl2 photocatalyst
  • Preparation method of three-dimensional flower-like Bi12O17Cl2 photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Bi(NO 3 ) 3 ·5H 2 O was dissolved in glacial acetic acid to prepare 0.15mol / L Bi(NO 3 ) 3 solution in glacial acetic acid, stirred at room temperature until Bi(NO 3 ) 3 ·5H 2 O is all dissolved; The mass fraction of glacial acetic acid is 99.8%;

[0030] 2) Add the pre-prepared 0.5mol / L KCl solution dropwise to the mixed solution obtained in step 1), and react at room temperature for 1h; the amount of KCl solution added is such that Bi(NO 3 ) 3 The molar ratio to KCl is 6:1.

[0031] 3) adding dropwise to the mixture a Na concentration of 0.895mol / L 2 CO 3 solution until the H in solution + Completely neutralized, react at room temperature for 1.5h;

[0032] 4) Suction filter, wash and dry the reaction solution in step 3) to obtain the precursor; the drying conditions are: centrifugal speed: 1000r / min, drying temperature 60°C, drying time 6h.

[0033] 5) Put the precursor obtained in step 4) in the ark, and calcined at a constant temperature of 400°C for...

Embodiment 2

[0038] 1) Bi(NO 3 ) 3 ·5H 2 O was dissolved in glacial acetic acid to prepare 0.1mol / LBi(NO 3 ) 3 solution in glacial acetic acid, stirred at room temperature until Bi(NO 3 ) 3 ·5H 2 O is all dissolved; The mass fraction of glacial acetic acid is 99.0%;

[0039] 2) Add the pre-prepared 0.1mol / L KCl solution dropwise to the mixed solution obtained in step 1), and react at room temperature for 1 h; the amount of KCl solution added is such that Bi(NO 3 ) 3 The molar ratio to KCl is 6:5.

[0040] 3) adding dropwise to the mixture a Na concentration of 0.895mol / L 2 CO 3 solution until the H in solution + Completely neutralized, react at room temperature for 1.5h;

[0041] 4) Suction filter, wash and dry the reaction solution in step 3) to obtain the precursor; the drying conditions are: centrifugal speed: 1000r / min, drying temperature 60°C, drying time 8h.

[0042] 5) Put the precursor obtained in step 4) in the ark, and calcined at a constant temperature of 200°C for ...

Embodiment 3

[0044] 1) Bi(NO 3 ) 3 ·5H 2 O was dissolved in glacial acetic acid to prepare 0.2mol / L Bi(NO 3 ) 3 solution in glacial acetic acid, stirred at room temperature until Bi(NO 3 ) 3 ·5H 2 O is all dissolved; The mass fraction of glacial acetic acid is 99.8%;

[0045] 2) Add the pre-prepared 1.0mol / L KCl solution dropwise to the mixed solution obtained in step 1), and react at room temperature for 1h; the amount of KCl solution added is such that Bi(NO 3 ) 3 The molar ratio to KCl is 3:5.

[0046] 3) adding dropwise to the mixture a Na concentration of 0.895mol / L 2 CO 3 solution until the H in solution + Completely neutralized, react at room temperature for 1.5h;

[0047] 4) Suction filter, wash and dry the reaction solution in step 3) to obtain the precursor; the drying conditions are: centrifugal speed: 1000r / min, drying temperature 60°C, drying time 12h.

[0048] 5) Put the precursor obtained in step 4) in the ark, and calcine at a constant temperature of 600°C for ...

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Abstract

The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a three-dimensional flower-like Bi12O17Cl2 photocatalyst, which comprises the following steps: 1) dissolving Bi(NO3)<3>.5H2O in glacial acetic acid; 2) adding a KCl solution, and reacting at room temperature; 3) adding a Na2CO3 solution, and reacting at room temperature; 4) performing suction filtration, washing and drying on the reaction solution to obtain a precursor; and 5) placing the precursor in an ark, and calcining the precursor in a muffle furnace at a certain temperature toobtain the three-dimensional flower-like Bi12O17Cl2. The Bi12O17Cl2 prepared by the method disclosed by the invention is special in morphology, a novel method is provided for synthesizing the Bi12O17Cl2 with the three-dimensional flower-like morphology, the preparation cost is low, the safety is good, the practicability is high, the prepared precursor is in a three-dimensional flower shape, and the flower-like morphology can still be kept after high-temperature calcination. The prepared product is high in purity, good in stability and relatively good in photocatalytic performance.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a three-dimensional flower-like Bi 12 o 17 Cl 2 Preparation method of photocatalyst. Background technique [0002] Bi 12 o 17 Cl 2 It is a new type of non-stoichiometric photocatalytic material, which belongs to the class of bismuth oxyhalide BiOX (X=Cl, Br, I). Because of its special layered structure, suitable band gap and excellent photoelectric characteristics, it makes It exhibits good photocatalytic activity and is widely used in the fields of dye degradation, selective oxidation catalyst and cosmetics. [0003] It is well known that the catalytic activity of photocatalysts is closely related to their morphology and structure. However, currently against Bi 12 o 17 Cl 2 There are not many studies on photocatalysts, especially in terms of improving their photocatalytic performance by tuning their morphology. According to existing literature reports, th...

Claims

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Application Information

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IPC IPC(8): B01J27/06
CPCB01J27/06B01J35/39
Inventor 石磊方可欣姚丽珠
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY