Tungsten-acidified cerium-doped zirconium dioxide coated titanium dioxide solid super acid filler

A solid super acid, zirconium dioxide technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. It can improve the anti-pollution ability and improve the photocatalytic efficiency.

Inactive Publication Date: 2019-06-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the monoclinic crystal form of ZrO at room temperature 2 cannot be acidified to form a solid superacid, and SO 4 2- / ZrO 2 SO on the surface of solid superacid 4 2- Contact with water for a long time will gradually lose the number of acid centers on the surface of the catalyst, resulting in weakened acid strength and loss of catalytic activity

Method used

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  • Tungsten-acidified cerium-doped zirconium dioxide coated titanium dioxide solid super acid filler
  • Tungsten-acidified cerium-doped zirconium dioxide coated titanium dioxide solid super acid filler
  • Tungsten-acidified cerium-doped zirconium dioxide coated titanium dioxide solid super acid filler

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Experimental program
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Effect test

Embodiment 1

[0019] The preparation method of cerium tungstate-doped zirconia-coated titanium dioxide solid superacid filler comprises the following steps:

[0020] 1) Take 0.2gTiO 2 , mixed with 100mL of anhydrous methanol, stirred evenly, transferred to a container containing 400mL of deionized water, and then added 0.1g of lignin amine to it, ultrasonically dispersed for 45min to obtain a dispersion, took it out, and added concentrated ammonia water to the dispersion, Let the pH be 10, add 80mL of solution 1 at a feeding rate of 10mL / min, stir for 3h, stop stirring, leave to age at room temperature for 4.5h, centrifuge, filter, wash with deionized water until neutral, take out the filter cake ; Vacuum drying at 60°C for 8h; Grinding and calcining at 550°C for 3h to obtain a light yellow precursor; 2 ·8H 2 O and 0.0025gCe(SO 4 ) 2 4H 2 O was dissolved in deionized water to make the total volume 80mL, and mixed evenly to prepare;

[0021] 2) Immerse the precursor in 3g / L ammonium tu...

Embodiment 2

[0027] The preparation method of cerium tungstate-doped zirconia-coated titanium dioxide solid superacid filler comprises the following steps:

[0028] 1) Take 0.1gTiO 2 , mixed with 20mL of anhydrous methanol, stirred evenly, transferred to a container containing 100mL of deionized water, and then added 0.01g of lignin amine to it, ultrasonically dispersed for 30min to obtain a dispersion, took it out, and added concentrated ammonia water to the dispersion, Make the pH to 9, add 20mL of solution 1 at a feeding rate of 1mL / min, stir for 2h, stop stirring, leave to age at room temperature for 4h, centrifuge, filter, wash with deionized water until neutral, and take out the filter cake; Vacuum drying at 50°C for 5h; Grinding and calcining at 500°C for 4h to obtain a light yellow precursor; the first solution is to mix 0.1428g ZrOCl 2 ·8H 2 O and 0.0144g Ce(SO 4 ) 2 4H 2 O was dissolved in deionized water to make the total volume 20mL, and mixed evenly to prepare;

[0029] ...

Embodiment 3

[0034] The preparation method of cerium tungstate-doped zirconia-coated titanium dioxide solid superacid filler comprises the following steps:

[0035] 1) Take 5gTiO 2 , mixed with 200mL of anhydrous methanol, stirred evenly, transferred to a container containing 700mL of deionized water, and then added 0.5g of lignin amine to it, ultrasonically dispersed for 60min to obtain a dispersion, took it out, and added concentrated ammonia water to the dispersion, Make the pH to 11, add 200mL of solution 1 at a feeding rate of 20mL / min, stir for 4 hours, stop stirring, leave to age at room temperature for 5 hours, centrifuge, filter, wash with deionized water until neutral, and take out the filter cake; Vacuum drying at 70°C for 10 hours; finely ground, calcined at 600°C for 2 hours to obtain a light yellow precursor; the first solution is to mix 7.296g of ZrOCl 2 ·8H 2 O and 5.4g Ce(SO 4 ) 2 4H 2 O was dissolved in deionized water to make the total volume 200mL, and mixed evenly...

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Abstract

The invention discloses a tungsten-acidified cerium-doped zirconium dioxide coated titanium dioxide solid super acid filler. A preparation method comprises the following steps: 1) mixing TiO2 with absolute methanol, uniformly stirring the mixture, transferring the mixture into water, adding lignin amine, performing dispersion, adding stronger ammonia water and a solution I, conducting a stirring reaction, performing standing and aging at room temperature, performing centrifugation, filtration and washing, taking out a filter cake, performing drying, and performing calcination to obtain a lightyellow precursor; 2) impregnating the precursor in an ammonium tungstate aqueous solution, taking out and drying the precursor, and performing calcination to obtain the tungsten-acidified cerium-doped zirconium dioxide coated titanium dioxide solid super acid filler. The filler has better acidity, water stability and heat stability, can be applied to liquid phase reactions and can inhibit membrane pollution phenomena under the action of photocatalysis and solid super acid and improve pollution resistance of membranes. Pore size distribution of core-shell particles is centralized in the mesoporous range, adsorption and transfer processes of pollutants on particle surfaces are facilitated, and photocatalytic efficiency can be improved.

Description

technical field [0001] The invention relates to a cerium tungstate-doped zirconium dioxide-coated titanium dioxide solid superacid filler and a preparation method thereof. It belongs to the preparation technology of inorganic filling materials. Background technique [0002] At present, ultrafiltration technology has been widely used in the fields of chemical industry, food, medicine and electronics. However, during the use of ultrafiltration membranes, suspended solids, colloids, solute macromolecules, and microbial bacteria in the feed Adsorption and deposition on the membrane surface or in the membrane pores will block the membrane pores and form membrane fouling, seriously affecting the flux and separation efficiency of the membrane. In view of the problem of membrane fouling, most of the current research focuses on improving the hydrophilicity of the membrane, and improving the hydrophilicity of the membrane by grafting, coating, and blending hydrophilic polymers or ino...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01J23/30
Inventor 张裕卿孙帅
Owner TIANJIN UNIV
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