A method for uniformly preparing attapulgite-titanium dioxide composite material

A technology of attapulgite and titanium dioxide, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem that the advantages and functions of nanomaterials cannot be brought into play, and the distribution of titanium dioxide on the surface of attapulgite is uneven and uncontrollable Issues such as the uniformity of titanium dioxide loading

Active Publication Date: 2022-05-27
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current commonly used sol-gel method, acid-base neutralization co-current method and ultrasonic dispersion-reprecipitation method all have the problem that the loading amount of titanium dioxide on the surface of attapulgite (that is, the degree of uniformity) cannot be controlled. At this stage of titanium hydroxide, the excess precursor will hydrolyze and self-agglomerate, completely wrapping the attapulgite, forming micron-sized particles, which cannot play the advantages and functions of nanomaterials (quoted from An Qingzhen: Preparation of nano-titanium dioxide , modification and photocatalytic properties
This method can effectively improve the situation of titanium dioxide agglomeration caused by the hydrolysis of excess butyl titanate, but the distribution of titanium dioxide on the surface of the attapulgite is still uneven

Method used

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  • A method for uniformly preparing attapulgite-titanium dioxide composite material
  • A method for uniformly preparing attapulgite-titanium dioxide composite material
  • A method for uniformly preparing attapulgite-titanium dioxide composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Mix 10 mL of butyl titanate with 30 mL of ethanol, then add 2 mL of acetic acid, and magnetically stir the resulting solution for 30 min (rotation speed is 480 rpm) to obtain a butyl titanate precursor solution;

[0060] Add 2 g of purified attapulgite to the butyl titanate precursor solution, stir magnetically for 2 hours (rotation speed is 320 rpm) and then ultrasonically disperse for 1 hour. After suction filtration, add 10 mL of ethanol to the obtained product, and alternately stir (30 min, 480rpm) and ultrasonic dispersion (30min) three times each to obtain attapulgite-butyl titanate precursor dispersion;

[0061] Put the attapulgite-butyl titanate precursor dispersion into a small beaker (100 mL), place the small beaker in a large beaker (500 mL), add 100 mL of deionized water to the periphery, and seal the large beaker with plastic wrap , placed in a water bath with magnetic stirring, rotating speed of 80 rpm, heated at 60 °C at a constant temperature, and steam ...

Embodiment 2

[0063]Mix 10 mL of butyl titanate with 40 mL of ethanol, then add 2 mL of acetic acid, and magnetically stir the resulting solution for 20 min (rotation speed is 320 rpm) to obtain a butyl titanate precursor solution;

[0064] Add 2 g of purified attapulgite to the butyl titanate precursor solution, stir magnetically for 2 hours (rotation speed is 320 rpm) and then ultrasonically disperse for 1 hour. After suction filtration, add 10 mL of ethanol to the obtained product, and alternately stir (30 min, 320rpm) and ultrasonic dispersion (30min) three times each to obtain attapulgite-butyl titanate precursor dispersion;

[0065] Put the attapulgite-butyl titanate precursor dispersion into a small beaker (100 mL), place the small beaker in a large beaker (500 mL), add 100 mL of deionized water to the periphery, and seal the large beaker with plastic wrap , placed in a water bath with magnetic stirring, rotating at 160 rpm, heated at a constant temperature of 40 °C, and subjected to...

Embodiment 3

[0067] Mix 75 mL of butyl titanate with 225 mL of ethanol, then add 15 mL of acetic acid, and magnetically stir the resulting solution for 60 min (rotating speed is 480 rpm) to obtain a butyl titanate precursor solution;

[0068] Add 15 g of purified attapulgite to the butyl titanate precursor solution, stir magnetically for 3 h (rotation speed is 480 rpm), and then ultrasonically disperse for 3 h. After suction filtration, add 50 mL of ethanol to the obtained product, and alternately stir (30 min, 480rpm) and ultrasonic dispersion (30min) three times each to obtain attapulgite-butyl titanate precursor dispersion;

[0069] Put the attapulgite-butyl titanate precursor dispersion into a small beaker (100 mL), place the small beaker in a large beaker (500 mL), add 100 mL of deionized water to the periphery, and seal the large beaker with plastic wrap , placed in a water bath with magnetic stirring, rotating at 240 rpm, heated at 60 °C at a constant temperature, steam hydrolysis, ...

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Abstract

The invention provides a method for uniformly preparing attapulgite-titanium dioxide composite material, which belongs to the technical field of hybrid materials. The present invention adopts the steam hydrolysis method, supplemented by magnetic stirring in the whole hydrolysis process, hydrolysis is carried out through the method of constant temperature heating in water bath, and at the same time, the stirring speed and the temperature of water bath are controlled, so as to control the contact speed of attapulgite and water vapor and the contact speed of butyl titanate The degree of hydrolysis can ensure the uniformity of titanium dioxide, so that the titanium dioxide in the obtained attapulgite-titania composite material is evenly distributed on the surface of the attapulgite, and at the same time, the attapulgite in the composite material still maintains low agglomeration.

Description

technical field [0001] The invention relates to the technical field of hybrid materials, in particular to a method for uniformly preparing attapulgite-titanium dioxide composite material. Background technique [0002] Attapulgite (ATP) is a natural nanoscale mineral material with a special rod-like fibrous structure, and its ideal molecular formula is Mg 5 (H 2 O) 4 [Si 4 O 10 ](OH) 2 , which consists of two silicon-oxygen tetrahedron structures sandwiched by aluminum-oxygen tetrahedrons, which are connected by oxygen to form a channel-like crystal structure. Because attapulgite has a special chain-layered crystal structure and its unique colloidal properties such as dispersion, water absorption, and resistance to salt and alkali, and because attapulgite has nano-scale pores and small crystal size, it has good colloidal properties. Catalytic and heat resistant properties. [0003] Titanium dioxide is a white solid or powdered amphoteric oxide with good opacity and smo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J21/16C01B33/40C01G23/053
CPCB01J21/063B01J21/16C01B33/40C01G23/053C01P2004/80Y02W10/37
Inventor 王云霞孟兆洁阎逢元
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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