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Sol-gel method for preparing water treatment metal oxide film

A technology of water treatment membrane and gel method, which is applied in chemical instruments and methods, permeation/dialysis water/sewage treatment, membrane technology, etc. It can solve problems such as difficult to control operation and high temperature exceeding 1000°C, and achieve low synthesis temperature, The effect of low preparation cost and easy reaction process

Inactive Publication Date: 2017-10-20
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the traditional solid-state sintering method requires a high temperature exceeding 1000°C and is difficult to control the operation, and provides a method for preparing metal oxide water treatment membranes by the sol-gel method

Method used

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  • Sol-gel method for preparing water treatment metal oxide film
  • Sol-gel method for preparing water treatment metal oxide film
  • Sol-gel method for preparing water treatment metal oxide film

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specific Embodiment approach 1

[0020] Specific embodiment one: In this embodiment, a method for preparing a metal oxide water treatment membrane by a sol-gel method is specifically carried out according to the following steps:

[0021] 1. Add metal nitrate to deionized water, then add citric acid, heat and stir evenly with magnetic force, then add ethylene glycol, heat and stir evenly with magnetic force, control the temperature at 95°C, heat and stir in an oil bath to obtain a sol;

[0022] 2. Clean and dry the stainless steel mesh; the pore size of the stainless steel mesh is 3 μm;

[0023] 3. Put the stainless steel mesh processed in step 2 into a glue homogenizer, spin-coat the sol obtained in step 1, then dry, and repeat the spin-coating and drying for 3 to 5 times to obtain a coated stainless steel mesh;

[0024] 4. Put the stainless steel mesh coated in step 3 into a muffle furnace, heat it to 700-900°C by means of temperature programming, keep it warm for 0.5h-2h, and cool it to room temperature wit...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment differs from Embodiment 1 in that the metal nitrate in step 1 is one or a mixture of any two of iron nitrate, copper nitrate, manganese nitrate, aluminum nitrate and calcium nitrate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: metal nitrate is the mixing of ferric nitrate and copper nitrate in step one, wherein Cu(NO 3 ) 2 ·3H 2 O and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 1:2. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to the technical field of water treatment, in particular to a sol-gel method for preparing a water treatment metal oxide film. The invention solves the technical problems that in the conventional solid-state sintering method for preparing the metal oxide film, over 1000 DEG C high temperature is needed, and the operation is difficult to control. The sol-gel method comprises the following steps: 1, preparing sol; 2, treating a stainless steel mesh; 3, performing spin coating on the stainless steel mesh by using the sol; 4, putting the coated stainless steel mesh into a muffle furnace, and calcinating to obtain the metal oxide film. The sol-gel method for preparing the metal oxide film has the characteristics of low synthesis temperature, convenient operation, low preparation cost and the like, and the characteristic metal oxide film has the characteristics of a catalytic property, magnetism and the like besides an interception filtration characteristic of a film. The sol-gel method has a relatively important significance for a combined film process-water treatment technology, and has a wide application prospect in the field of water treatment.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to synthesizing a metal oxide film by a sol-gel method. Background technique [0002] In the field of membrane water treatment technology, organic membranes are widely used. However, compared with commonly used organic membranes, inorganic ceramic membranes have outstanding advantages such as chemical corrosion resistance, high mechanical strength, and long service life, so they are often used in harsh environments. For example, ceramic membranes are often used effectively in the treatment of oily wastewater. application. Compared with organic membrane materials, ceramic membrane materials used in water treatment are very limited, mainly TiO 2 , SiO 2 、Al 2 o 3 , ZrO 2 Mainly. [0003] The main technologies for the preparation of inorganic ceramic membranes are: the traditional solid particle sintering method, which mainly prepares base membranes and carriers; chemica...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/10B01D69/02B01D67/00C02F1/44
Inventor 马军吕东伟赵雨萌
Owner HARBIN INST OF TECH
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