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Preparation method of Bi2O2.33 nano-sheets

A nanosheet, H2SO4 technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of difficult to achieve industrialized production, complex process, small output, etc., and achieve energy reduction, simple preparation process, and large output. Effect

Active Publication Date: 2018-06-22
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Bi 2 o 2.33 Nanosheet is also a kind of Bi-based oxide. The current preparation method is mainly electrocorrosion method, which uses bismuth foil metal as the anode and nickel foil as the cathode material, and then puts it into the electrolyte, and under the action of direct current, the Electrolyzed to get Bi 2 o 2.33 Nanosheets, but this method has the disadvantages of complex process, small output, and difficulty in realizing industrial production, which limits its application

Method used

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  • Preparation method of Bi2O2.33 nano-sheets

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Embodiment 1

[0022] Solution A was prepared by ultrasonically mixing 0.6M bismuth nitrate aqueous solution and 2.0M nitric acid solution at a volume ratio of 1:1. After mixing surfactant CTAB and 0.3M sodium carbonate solution at a mass volume ratio of 1:200g / ml, liquid B was prepared.

[0023] According to the volume ratio of liquid A to liquid B is 1:10, slowly add liquid A to liquid B, stir magnetically for 2 hours, then add 1.0M HNO 3 Solution (HNO 3 The volume ratio of the solution to the B liquid is 1:3), after continuing to stir and react for 60min, filter, wash and dry to obtain a white solid (Oxygen deficient Bi 2 o 2 CO 3 ). Place the white solid in a muffle furnace, raise the temperature to 500°C at a rate of 5°C / min, and calcinate at this temperature for 2 hours to obtain Bi 2 o 2.33 Nanosheets.

[0024] Bi prepared by SEM 2 o 2.33 The microscopic morphology analysis was carried out, and the results were as follows figure 1 As shown, it can be seen from the figure tha...

Embodiment 2

[0028] Solution A was prepared by ultrasonically mixing 0.8M bismuth chloride aqueous solution and 0.5M sulfuric acid solution at a volume ratio of 1:5. After mixing surfactant Tween 20 and 0.5M sodium hypochlorite solution at a mass volume ratio of 1:100, liquid B was prepared.

[0029] According to the volume ratio of A liquid and B liquid is 1:15, slowly add A liquid to B liquid, after magnetic stirring for 3 hours, add 1.0M HCl solution (the volume ratio of HCl solution and B liquid is 1:2), After continuing to stir and react for 30 min, filter, wash and dry to obtain a white solid (oxygen-deficient BiOCl). Place the white solid in a muffle furnace, raise the temperature to 350°C at a rate of 10°C / min, and calcinate at this temperature for 1 hour to obtain Bi 2 o 2.33 Nanosheets.

[0030] Bi 2 o 2.33 The evaluation method of the catalytic activity of the nanosheets is the same as in Example 1, and the degradation rate of the rhodamine B solution after 2 hours of react...

Embodiment 3

[0032]Solution A was prepared by ultrasonically mixing 1.0M bismuth vanadate aqueous solution and 0.1M sulfuric acid solution at a volume ratio of 1:10. After mixing the surfactant PVP and 1.0M sodium oxalate solution at a mass volume ratio of 1:150, liquid B was prepared.

[0033] According to the volume ratio of A solution and B solution is 1:20, slowly add A solution to B solution, after magnetically stirring for 5 hours, add 5.0M acetic acid solution (the volume ratio of acetic acid solution and B solution is 1:5), After continuing to stir and react for 10min, filter, wash and dry to obtain a white solid (Oxygen deficient Bi 2 (C 2 o 4 ) 3 ). Put the white solid in a muffle furnace, raise the temperature to 650°C at a rate of 1°C / min, and calcinate at this temperature for 1.5h to obtain Bi 2 o 2.33 Nanosheets.

[0034] Bi 2 o 2.33 The evaluation method of the catalytic activity of the nanosheets is the same as in Example 1, and the degradation rate of the rhodamin...

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Abstract

The invention discloses a preparation method of Bi2O2.33 nano-sheets. The preparation method comprises the following steps: 1) carrying out ultrasonic mixing on a bismuth salt water solution and an acid solution to obtain a solution A; 2) dissolving a surfactant into a strong-alkali and weak-acid salt water solution; after uniformly mixing, obtaining a solution B; 3) dropwise adding the solution Ainto the solution B; carrying out magnetic stirring and reacting; then adding an acid solution and continually stirring and reacting; after reaction is finished, filtering, washing and drying to obtain a white solid; 4) roasting the white solid in a muffle furnace to obtain the Bi2O2.33 nano-sheets. The preparation method disclosed by the invention has the advantages of simple preparation technology, great yield and easiness for realizing industrial production; a whole reaction system is a waterborne system and an organic solvent is not used so that pollution is not easy to generate; the Bi2O2.33 nano-sheets contain Bi<2+> and Bi<3+> at the same time and two Bi atoms have a coupling effect to generate an impurity energy level, so that energy needed by optical excitation in a photo-catalytic reaction process is reduced, and furthermore, the performance of a photocatalyst is improved; the degradation rate of rhodamine B can reach 82 percent or more.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, in particular to a Bi 2 o 2.33 Preparation methods of nanosheets. Background technique [0002] With the development of human science and technology, organic dyes are widely used in textile, leather, food, daily chemical and other industries. During the use of dyes, about 10% are directly discharged into the water body, causing serious pollution to the color of the water body. Because organic dyes are usually aromatic compounds, they have high chemical stability and low biodegradability, and most dyes and their metabolic intermediates are mutagenic and carcinogenic. [0003] Using the photocatalytic properties of semiconductor materials to degrade organic dyes in water is a new water treatment technology. Commonly used semiconductor photocatalysts are mainly Ti-based oxides, with an absorption band gap of about 3.2eV and a spectral absorption threshold of 387nm, which can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y30/00B82Y40/00B01J23/18
CPCB82Y30/00B82Y40/00C01G29/00B01J23/18C01P2002/72C01P2004/61B01J35/39
Inventor 王建秀黄雅亮梁栋
Owner CENT SOUTH UNIV