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Method for preparing regular-triangular-pyramid-shaped bismuth germinate visible-light catalyst

A technology of regular triangular pyramid and bismuth germanate is applied in the field of environmental purification to achieve the effect of simple preparation process, low cost and good visible light catalytic activity

Active Publication Date: 2014-02-19
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] So far, there is no literature or patent report on the preparation of regular triangular pyramid structure Bi by hydrothermal method using CTAB as surfactant. 12 GeO 20 catalyst of light

Method used

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  • Method for preparing regular-triangular-pyramid-shaped bismuth germinate visible-light catalyst
  • Method for preparing regular-triangular-pyramid-shaped bismuth germinate visible-light catalyst
  • Method for preparing regular-triangular-pyramid-shaped bismuth germinate visible-light catalyst

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Embodiment 2

[0025] 1) Under normal temperature (25 °C) and magnetic stirring conditions, 12 mmol of bismuth nitrate pentahydrate and 1 mmol of germanium oxide were dissolved in 70 mL of 5 mol / L sodium hydroxide solution to obtain a mixed solution A; Add 0.5 g cetyltrimethylammonium bromide (CTAB) to mixed solution A to obtain mixed solution B;

[0026] 2) Transfer the above mixed liquid B to a 100 mL stainless steel reaction kettle lined with polytetrafluoroethylene (volume filling degree is 75%), and heat it in a constant temperature oven at 180 °C for 12 h. Cool to room temperature;

[0027] 3) The product obtained in step 2) was centrifuged and washed 5 times with pure water and absolute ethanol, and then dried at a constant temperature of 70 °C for 5 h to obtain regular triangular pyramid Bi 12 GeO 20 catalyst of light.

[0028] The XRD spectrogram of the product obtained in this embodiment is shown in figure 1 (b). figure 1 (b) shows that all its XRD peaks are consistent with the ...

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Abstract

The invention relates to a method for preparing a regular-triangular-pyramid-shaped bismuth germinate visible-light catalyst. The method is characterized by comprising the following steps: (1) under a stirring condition, according to the mole number 12:1:350 of bismuth nitrate pentahydrate: germanium oxide: sodium hydroxide, dissolving the bismuth nitrate pentahydrate and the germanium oxide into a 5mol / L sodium hydroxide solution to obtain a mixed solution A; according to the mole number 1:0.0039 of cetyl trimethyl ammonium bromide: sodium hydroxide, adding the cetyl trimethyl ammonium bromide into the obtained mixed solution A to obtain a mixed solution B; (2) carrying out heat treatment for 12 hours at 180 DEG C in a constant temperature oven; (3) after washing for 5 times, drying for 5 hours under the condition of constant temperature of 70 DEG C to obtain the regular-triangular-pyramid-shaped bismuth germinate visible-light catalyst. The method has the advantages that the preparation process is simple and easy to operate, the used raw materials are free from pollution and low in cost, the morphology and the crystal structure of the target product particles are controllable and the like. The prepared light catalyst has better visible-light catalytic activity for organic pollutants.

Description

technical field [0001] The present invention relates to regular triangular pyramid-shaped bismuth germanate (Bi 12 GeO 20 ) The preparation method of visible light catalyst belongs to the field of photocatalyst new material technology and environmental purification. Background technique [0002] Photocatalytic oxidation technology, as an emerging green environmental protection technology, can directly use sunlight to deeply mineralize pollutants without causing secondary pollution, and has broad application prospects in environmental governance. Among many semiconductor photocatalytic materials, titanium dioxide (TiO 2 ) has attracted the attention of many experts and scholars due to its strong light corrosion resistance, high stability, relatively low price and non-toxicity to the human body. However, from the perspective of the utilization rate of solar energy, the current TiO 2 It has not yet been widely applied in the actual industrial water treatment, which is due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18
Inventor 张高科万震
Owner WUHAN UNIV OF TECH
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