Preparation for visible-light responsible BiVO4 catalyst

A technology of visible light and catalyst, applied in the fields of vanadium compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of insufficient utilization of sunlight, low production of photo-induced electron-hole pairs, high probability of recombination reaction, etc., to achieve Rapid reproducibility, sufficient raw materials, and low cost effects

Inactive Publication Date: 2014-10-22
HAINAN NORMAL UNIV
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Problems solved by technology

However, TiO 2 However, the photocatalytic activity has not reached the effect of practical application. There are two main problems: one is that TiO 2 The band gap is wide (3.0-3.2eV), and the spectral response range is narrow. It can only absorb photons

Method used

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  • Preparation for visible-light responsible BiVO4 catalyst
  • Preparation for visible-light responsible BiVO4 catalyst
  • Preparation for visible-light responsible BiVO4 catalyst

Examples

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Embodiment

[0033] Visible-light-responsive BiVO with different morphologies 4 Preparation of nanomaterials:

[0034] Weigh 0.968g bismuth nitrate, 0.058g ammonium metavanadate, measure solvent diethylene glycol, water, the ratio of the two is 20:20, and the total volume is 160mL. Under the condition of heating and stirring at 55-65° C., ammonium metavanadate was dissolved in 40 mL of water, and bismuth nitrate was dissolved in a diethylene glycol-water mixed solution composed of diethylene glycol and the remaining water. After cooling to room temperature, while stirring, slowly pour the ammonium metavanadate solution into the bismuth nitrate solution, stir for 30 minutes, then transfer the reaction mixture to the reaction kettle, put it in an electric oven, and keep the reaction at a constant temperature of 140°C 12h. Cool naturally to room temperature, collect the powder product, wash the precipitate with water and ethanol three times in turn, and centrifuge. Finally, the collected p...

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Abstract

The invention discloses a preparation method for a visible-light responsible BiVO4 catalyst. The method comprises: taking a bismuth compound and a vanadium compound respectively as a bismuth source and a vanadium source, taking mixtures of water and an organic alcohol with different ratios as reaction solvents, and performing a hydro-thermal synthesis reaction, so as to obtain a catalytic material in the forms of a nanometer small particle, a nanometer ellipsoid, a flower-shaped structure or a branch structure. The visible-light responsible catalyst containing BiVO4 with different morphologies helps to greatly improve the photocatalysis degradation efficiency when being applied to the field of photocatalytic degradation of pollutants. The preparation method has the advantages of simple operation, mild reaction conditions, low equipment cost, relatively strong visible-light absorption, good visible-light catalytic performance and the like.

Description

technical field [0001] The present invention relates to visible light-responsive BiVO 4 The field of nanomaterial preparation and photocatalysis technology, specifically related to the preparation of nanoparticles, nano-ellipsoids, flower-like structures and dendritic structures BiVO by hydrothermal synthesis 4 materials, and the visible light response of BiVO with different morphologies 4 As a photocatalyst, degrades Rhodamine B. Background technique [0002] With the increasing global environmental pollution and energy crisis, the preparation, development and application of visible light-responsive catalytic technology and its materials that can make full use of green and environmentally friendly solar energy to realize photocatalytic degradation of pollutants or hydrogen production have become a major issue in chemistry and materials science. and environmental science and other hot research topics. Since Fujishima discovered TiO in 1972 2 Since the catalytic decomposi...

Claims

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Application Information

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IPC IPC(8): C01G31/00B01J23/22B82Y30/00A62D3/17A62D101/28A62D101/26
Inventor 雷炳新孙振范孙伟李高楠
Owner HAINAN NORMAL UNIV
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