Preparation method of hexagonal trumpet flower shape sodium hexafluorisilicate crystal

A technology of sodium hexafluorosilicate and morning glory, which is applied in the direction of silicate, alkali metal silicate, etc., can solve the problem of single crystal shape of sodium hexafluorosilicate, achieve low cost, easy to obtain materials, and simple preparation method Effect

Inactive Publication Date: 2010-09-22
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the problem that the shape of the existing sodium hexafluorosilicate...

Method used

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  • Preparation method of hexagonal trumpet flower shape sodium hexafluorisilicate crystal
  • Preparation method of hexagonal trumpet flower shape sodium hexafluorisilicate crystal
  • Preparation method of hexagonal trumpet flower shape sodium hexafluorisilicate crystal

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specific Embodiment approach 1

[0008] Embodiment 1: The preparation method of the hexagonal trumpet-shaped sodium hexafluorosilicate crystal in this embodiment is carried out according to the following steps: 1. First, soak the glass substrate in concentrated sulfuric acid with a concentration ≥ 98% (mass) for 24 hours to 48h, then rinsed with deionized water and dried to obtain a clean glass substrate; 2. According to the concentration of silicon dioxide as 8% to 12% (mass), silicon dioxide particles with a particle size of 380nm to 450nm Add it to absolute ethanol, and place it in an ultrasonic cleaner for 5-15 minutes to obtain a silica emulsion; 3. Stand the clean glass substrate obtained in step 1 in a container containing the silica emulsion, Stand still, and after the ethanol volatilizes, the silica colloidal crystal template is obtained; 4. Weigh the polymer and solvent according to the concentration of the polymer at 8% to 12% (mass) and prepare a solution, and then drop the polymer solution to two ...

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment is different from Embodiment 1 in that: in step 1, the glass substrate is soaked in concentrated sulfuric acid for 28h-45h. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the glass substrate is soaked in concentrated sulfuric acid for 36 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of hexagonal trumpet flower shape sodium hexafluorisilicate crystal, relating to a preparation method of sodium hexafluorisilicate crystal. The invention solves the problem of single shape of the existing sodium hexafluorisilicate. The method of the invention comprises the following steps: erecting a clean glass substrate in ethanol emulsion of silicon dioxide, volatilizing ethanol after standing to obtain a silicon dioxide colloid crystal template; adding the polymer solution or melt on the template; removing the solvent or solidifying the melt to obtain a composite membrane; placing the composite membrane in hydrofluoric acid solution for 3-10min; and taking out of the composite membrane and washing to obtain the hexagonal trumpet flower shape sodium hexafluorisilicate crystal. The sodium hexafluorisilicate crystal prepared by the invention is of a hexagonal trumpet flower shape, has simple preparation method, easily obtained materials and low cost, and can be used as functional materials or used for water treatment.

Description

technical field [0001] The invention relates to a preparation method of sodium hexafluorosilicate crystal. Background technique [0002] Sodium hexafluorosilicate crystal, as an inorganic crystal material, especially a micron-scale crystal material, is widely used in the fields of functional materials, devices and water treatment. For reasons of bionics, crystals in the shape of flowers, plants and trees have received more attention. The existing silicon hexafluorosilicate is prepared by adding sodium carbonate and hydrofluoric acid during the crystallization process of sodium hexafluorosilicate, controlling the pH value to 2.5~3.5, and reacting for 45 minutes at a temperature of 25°C and a magnetic field strength of 5T. The shape of the sodium hexafluorosilicate crystal is a hexagonal prism; and the sodium hexafluorosilicate crystal grown in the carbon nanotube composite solution is a hexagonal tubular shape, and there is no report on the trumpet-shaped sodium hexafluorosi...

Claims

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Application Information

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IPC IPC(8): C01B33/32
Inventor 孙立国汪成赵冬梅战阴旭李佰林
Owner HEILONGJIANG UNIV
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