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A kind of preparation method of zirconia-silicon dioxide composite adsorption material

A composite adsorption material, silica technology, applied in chemical instruments and methods, silicon compounds, adsorbed water/sewage treatment, etc., can solve the problems of slow adsorption rate, low adsorption rate, etc., to improve the adsorption rate and improve the adsorption rate. , the effect of the simple method

Active Publication Date: 2020-06-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to provide a preparation method of zirconia-silicon dioxide composite adsorption material, which solves the problem of existing common SiO2 2 The problem of slow adsorption rate and low adsorption rate of nanomaterials

Method used

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  • A kind of preparation method of zirconia-silicon dioxide composite adsorption material

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preparation example Construction

[0025] A kind of preparation method of zirconium dioxide-silicon dioxide composite adsorption material of the present invention comprises the following steps:

[0026] Step 1, prepare SiO 2 sol

[0027] Take an appropriate amount of tetraethyl orthosilicate and anhydrous ethanol and fully mix it into a homogeneous solution, place it in an ice-water mixture, stir the homogeneous solution while slowly adding water and HCl or HNO 3 The mixture is stirred and refluxed at a temperature of 50-75°C for 2-5h and then cooled to room temperature to obtain SiO 2 Sol, ready for use, in which tetraethyl orthosilicate (TEOS), absolute ethanol (EtOH), water, HCl or HNO 3 The molar ratio is 1.0: 3.0-9.0:3.0-8.0:0.04-0.12, HCl or HNO 3 The concentration is 1.0-2.0mol / L;

[0028] Step 2, prepare ZrO 2 sol

[0029] Take the oxalic acid solution and the zirconium nitrate pentahydrate solution with a molar ratio of 1:4-5, add the oxalic acid solution dropwise to the zirconium nitrate pentahy...

Embodiment 1

[0034] (1) Preparation of SiO 2 sol

[0035] Thoroughly mix ethyl orthosilicate and absolute ethanol to form a homogeneous solution, put it in the ice-water mixture, add water and HCl with a concentration of 1.0mol / L while stirring, and stir and reflux at a temperature of 50°C for 5 hours Cool to room temperature to get SiO 2 Sol; wherein the molar ratio of ethyl orthosilicate, absolute ethanol, water, and HCl is 1:3:3:0.04.

[0036] (2) Preparation of ZrO 2 sol

[0037] Take zirconium nitrate pentahydrate solution and oxalic acid with a molar ratio of 4.5:1, add 0.2mol / L oxalic acid solution dropwise into 0.6mol / L zirconium nitrate pentahydrate solution, stir rapidly and heat to 50°C, keep the temperature and Add glycerol dropwise, stir and reflux for 4h and cool to room temperature to obtain clear and transparent ZrO 2 Sol, wherein the volume of glycerol is 30% of the sum of the volumes of zirconium nitrate pentahydrate solution and oxalic acid solution.

[0038] (3) Pre...

Embodiment 2

[0042] (1) Preparation of SiO 2 sol

[0043] Thoroughly mix tetraethyl orthosilicate and absolute ethanol to form a homogeneous solution, place it in ice-water mixture, add water and HCl with a concentration of 1.5mol / L while stirring, and stir and reflux at a temperature of 65°C for 3 hours Cool to get SiO 2 Sol; wherein the molar ratio of ethyl orthosilicate, absolute ethanol, water, and HCl is 1:8.3:7.6:0.1.

[0044] (2) Preparation of ZrO 2 sol

[0045] Take zirconium nitrate pentahydrate solution and oxalic acid with a molar ratio of 4:1, add 0.15mol / L oxalic acid solution dropwise into 0.4mol / L zirconium nitrate pentahydrate solution, stir rapidly and heat to 60°C, keep the temperature and Add glycerol dropwise, stir and reflux for 3h and cool to room temperature to obtain clear and transparent ZrO 2 Sol, wherein the volume of glycerol is 20% of the sum of the volumes of zirconium nitrate pentahydrate solution and oxalic acid solution.

[0046] (3) Preparation of Z...

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Abstract

The invention discloses a preparation method of a zirconium dioxide-silicon dioxide composite adsorption material. SiO2 sol and ZrO2 sol are respectively prepared, then, the SiO2 sol and the ZrO2 sol are mixed and dried and are calcined at a certain temperature to obtain the ZrO2-SiO2 composite adsorption material. ZrO2 with a catalytic action is imported into a common SiO2 material to improve both the adsorption speed of an SiO2 material and the adsorption rate of the SiO2 material. The method is simple and has a good practical value.

Description

technical field [0001] The invention belongs to the technical field of dyeing wastewater adsorption treatment, and in particular relates to a preparation method of a zirconium dioxide-silicon dioxide composite adsorption material. Background technique [0002] At present, with the rapid development of the textile industry and related industries, dyes have been widely used in textiles, plastics, cosmetics and papermaking. The pollution of printing and dyeing wastewater to the environment is also becoming more and more serious. However, due to its complex composition, high content of toxic substances, high chroma, and high content of organic matter, if it is directly discharged into the environment, it will cause great pollution to the water environment. poses a major threat to the health of organisms. At present, the treatment methods for printing and dyeing wastewater can be roughly divided into two categories: physical and chemical treatment and biochemical treatment. The ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/06B01J20/30C02F1/28C02F101/30
CPCB01J20/06B01J20/103C02F1/281C02F2101/308
Inventor 杨靖李淋钰贾德宝
Owner XI'AN POLYTECHNIC UNIVERSITY
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