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Preparation of hierarchical nanostructure Bi2O3/(BiO)2CO3

A hierarchical and composite photocatalytic technology, applied in the direction of catalyst activation/preparation, chemical/physical process, physical/chemical process catalyst, etc., can solve the problems of wide band gap and low light utilization rate, achieve stable performance and simple reaction method , Increase the effect of light utilization

Active Publication Date: 2017-04-26
QIQIHAR UNIVERSITY
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Problems solved by technology

However, pure semiconductor materials have defects such as wide band gap and low light utilization rate. Most photocatalytic materials can only use ultraviolet light in sunlight, and ultraviolet light only accounts for 3%-5% of sunlight.
At the same time, the types of pollutants in the real environment are gradually increasing, and a single photocatalytic material can no longer meet the actual needs. Therefore, it is meaningful to prepare photocatalytic materials that can respond to visible light and degrade various pollutants.

Method used

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  • Preparation of hierarchical nanostructure Bi2O3/(BiO)2CO3
  • Preparation of hierarchical nanostructure Bi2O3/(BiO)2CO3
  • Preparation of hierarchical nanostructure Bi2O3/(BiO)2CO3

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Embodiment Construction

[0017] 2323 The temperature-programmed hydrothermal synthesis method of composite photocatalytic materials, weighing 99.8% anhydrous sodium carbonate purchased from Tianjin Kaitong Chemical Reagent Co., Ltd. Bismuth citrate, with a mass of 1.6±0.010 g, was purchased from Tianjin Kaitong Chemical Reagent Co., Ltd. 96.0% NaOH, with a mass of 0.2±0.010 g. Measure 60 mL of double distilled water, add 0.46±0.001 g Na 2 CO 3 , to fully dissolve it. Then add 1.6±0.010 g of bismuth citrate and stir for 30 min. After the solution is clarified, add a quantitative NaOH (0.2±0.010 g NaOH, 5 mL deionized water) solution drop by drop, and continue stirring for 0.5 h. The above mixed solution was transferred to a polytetrafluoroethylene reactor, the temperature was programmed to rise at 2 °C / min to 160 °C, and kept under water heat for 24 h. Then, the resulting product was washed three times with deionized water and ethanol. Filter the sediment and put it in a drying box, set the tempe...

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Abstract

The invention relates to a method for synthesizing a Bi2O3 / (BiO)2CO3 composite photocatalytic material and belongs to the technical field of chemical industry. The method comprises the steps of weighing three kinds of chemical reagent raw materials, i.e., Na2CO3, bismuth citrate and NaOH according to a mole ratio, carrying out mixing, stirring the mixture in secondary distilled water for certain time, carrying out treatment by a programmed-heating hydrothermal process, then, carrying out repeated washing separately with deionized water and anhydrous ethanol, and carrying out baking, thereby obtaining the final product, i.e., the Bi2O3 / (BiO)2CO3 composite photocatalytic material. The surface morphology, microscopic structure and photocatalytic activity of the composite photocatalytic material are assayed, and the degradation of a variety of dyes such as rhodamine B under different light sources by the hierarchical garland-shaped Bi2O3 / (BiO)2CO3 composite photocatalytic material is greatly improved. The product is simple and practical in preparation process and stable in performance and has considerable applicability to a variety of dyes.

Description

technical field [0001] The invention relates to a hierarchical nanostructure Bi 2 o 3 / (BiO) 2 CO 3 The invention discloses a method for preparing a composite photocatalytic material, which belongs to the technical field of the chemical industry. Background technique [0002] Semiconductor photocatalytic technology has been continuously researched and expanded due to its advantages of greenness and environmental friendliness. However, pure semiconductor materials have defects such as wide band gap and low light utilization rate. Most photocatalytic materials can only use ultraviolet light in sunlight, and ultraviolet light only accounts for 3%-5% of sunlight. At the same time, the types of pollutants in the real environment are gradually increasing, and a single photocatalytic material can no longer meet the actual needs. Therefore, it is meaningful to prepare photocatalytic materials that can respond to visible light and degrade various pollutants. Simple (BiO) 2 CO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01J35/02B01J37/10
CPCB01J27/232B01J37/10B01J35/40B01J35/39
Inventor 李莉宋强禚娜刘雁南安明泽
Owner QIQIHAR UNIVERSITY
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