Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction and preparation method and application thereof

A 2H2O, heterojunction technology, applied in chemical instruments and methods, other chemical processes, organic compounds/hydrides/coordination complex catalysts, etc., to achieve novel synthesis methods, excellent visible light catalytic degradation, and excellent adsorption performance Effect

Active Publication Date: 2015-06-03
ANHUI NORMAL UNIV
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Problems solved by technology

However, so far, the synthesis of one-dimensional nanocomposites with excellent photocatalytic and adsorption properties is still a great challenge.

Method used

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  • Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction and preparation method and application thereof
  • Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction and preparation method and application thereof
  • Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction and preparation method and application thereof

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Embodiment Construction

[0033] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0034] In a preferred Bi 2 o 2 CO 3 -Bi(OHC 2 o 4 )·2H 2 The preparation method of the O heterojunction includes the following steps, weighing bismuth salt (2-3g), adding water to dissolve completely, adding an aqueous solution of sodium oxalate (1-2g) dropwise to the zinc nitrate solution, mixing evenly, React at 100-150°C for 30-40 hours. After the reaction, cool naturally to room temperature, wash the product with distilled water and ethanol, and dry to constant weight to obtain a precursor; weigh an appropriate amount of precursor (0.1-1g), surfactant (0.1-1g) and carbonate (0.01-0.1g) are dissolved in a certain amount of water (20-100ml), then add a certain amount of bismuth salt (0.01-0.1g), and stir for a certain period of time (1-10h) , after the reaction, naturally cooled ...

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Abstract

The invention relates to a Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction and a preparation method and application thereof. The method comprises the following steps: (1) dissolving a bismuth salt in water; (2) adding aqueous solution of sodium oxalate into bismuth nitrate solution; (3) reacting at a certain temperature for a certain time; (4) cooling; (5) washing and drying; (6) dissolving a proper amount of precursor, a surfactant and carbonate in a certain amount of water; (7) adding a certain amount of bismuth salt; (8) cooling; and (9) washing and drying, thereby obtaining the Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction. The one-dimensional Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction is synthesized, and the performances of catalysis and adsorption are integrated into a whole. The catalyst has an excellent visible light catalytic degradation effect on high-concentration dye rhodamine B (RhB) and has high optical stability and reusability. More important, the Bi2O2CO3-Bi(OHC2O4).2H2O heterojunction has good adsorption function on the dye rhodamine B (RhB) and methylene blue (MB) in a short time (within 5 minutes), and also has excellent adsorption performance on the dye methyl orange (MO). The saturated adsorption amount of 40mg of Bi2O2CO3-Bi(OHC2O4).2H2O nanometer composite material on MO is 94mg/g, the MO can be desorbed by adding ethanol to wash, and the adsorbent can be repeatedly used.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite material, in particular to a Bi 2 o 2 CO 3 -Bi(OHC 2 o 4 )·2H 2 O heterojunction, its preparation method and use. Background technique [0002] In recent years, with the continuous increase of population, the development and utilization of earth resources by human beings is also increasing day by day, which leads to the shortage of renewable resources and the intensification of environmental pollution (such as water pollution, air pollution, etc.). At present, the sewage treatment methods mainly include the combination of biological treatment, chemical oxidation and activated carbon adsorption. Biological treatment is difficult to adapt to the actual situation of dye wastewater with widely varying water quality, many types of dyes, and high toxicity, and the microorganisms themselves still have safety problems. The chemical oxidation method is easy to cause secondary pollution in th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J31/26C02F1/28C02F1/30
CPCY02W10/37
Inventor 彭银俞翩翩周海燕
Owner ANHUI NORMAL UNIV
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