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Hierarchical nanostructure bi 2 o 3 /(bio) 2 co 3 preparation of

A nanostructured and hierarchical technology, applied in the field of preparation of hierarchical nanostructured Bi2O3/2CO3 composite photocatalytic materials, can solve the problems of wide band gap and low light utilization rate, and achieve stable performance, simple reaction method, and increased light utilization rate. Effect

Active Publication Date: 2021-09-28
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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  • Hierarchical nanostructure bi <sub>2</sub> o <sub>3</sub> /(bio) <sub>2</sub> co <sub>3</sub> preparation of
  • Hierarchical nanostructure bi <sub>2</sub> o <sub>3</sub> /(bio) <sub>2</sub> co <sub>3</sub> preparation of
  • Hierarchical nanostructure bi <sub>2</sub> o <sub>3</sub> /(bio) <sub>2</sub> co <sub>3</sub> preparation of

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[0017] The temperature-programmed hydrothermal synthesis method of 2323 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, and 96.0% NaOH with a mass of 0.2±0.010 g purchased from Tianjin Kaitong Chemical Reagent Co., Ltd. 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 tempera...

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Abstract

The present invention relates to a Bi 2 o 3 / (BiO) 2 CO 3 The invention relates to a synthesis method of a composite photocatalytic material, which belongs to the technical field of chemical industry. Using Na 2 CO 3 , bismuth citrate, and NaOH three kinds of chemical reagent raw materials are weighed according to the molar ratio, mixed into double distilled water and stirred for a certain period of time. After drying to obtain the final product Bi 2 o 3 / (BiO) 2 CO 3 Composite photocatalytic materials. Its surface morphology, microstructure, and photocatalytic activity were measured, and the hierarchical rosette Bi 2 o 3 / (BiO) 2 CO 3 The composite photocatalytic material has a great improvement in the degradation of rhodamine B and other dyes under different light sources. The production process of this product is simple and practical, the product performance is stable, and it has considerable applicability to various 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 ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232B01J35/02B01J37/10B01J35/00
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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