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Method for uniformly preparing attapulgite-titanium dioxide composite material

A technology of attapulgite and titanium dioxide, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem that the uniformity of titanium dioxide loading cannot be controlled, the advantages and functions of nanomaterials cannot be exerted, and the surface of attapulgite cannot be controlled. The problem of uneven distribution of titanium dioxide

Active Publication Date: 2020-12-22
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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  • Method for uniformly preparing attapulgite-titanium dioxide composite material
  • Method for uniformly preparing attapulgite-titanium dioxide composite material
  • 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 (rotating at 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 h (320 rpm) and then ultrasonically disperse for 1 h. After suction filtration, add 10 mL of ethanol to the resulting product, and alternately stir (30 min, 480rpm) and ultrasonic dispersion (30min) each three times to obtain the attapulgite-butyl titanate precursor dispersion;

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

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 (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 h (320 rpm) and then ultrasonically disperse for 1 h. After suction filtration, add 10 mL of ethanol to the resulting product, and alternately stir (30 min, 320rpm) and ultrasonic dispersion (30min) each three times to obtain the attapulgite-butyl titanate precursor dispersion;

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

Embodiment 3

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

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

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

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Abstract

The invention provides a method for uniformly preparing an attapulgite-titanium dioxide composite material, which belongs to the technical field of hybrid materials. A steam hydrolysis method is adopted, magnetic stirring is assisted in the whole hydrolysis process, hydrolysis is conducted through a water bath constant-temperature heating method, meanwhile, the stirring rotating speed and the water bath temperature are controlled, accordingly, the contact speed of attapulgite and water vapor and the hydrolysis degree of butyl titanate are controlled, the uniformity of titanium dioxide can be guaranteed, titanium dioxide in the obtained attapulgite-titanium dioxide composite material is uniformly distributed on the surface of attapulgite, and meanwhile, attapulgite in the composite materialstill keeps 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 materials. Background technique [0002] Attapulgite (ATP) is a natural nano-scale mineral material with a special rod-like fiber structure, and its ideal molecular formula is Mg 5 (H 2 O) 4 [Si 4 o 10 ](OH) 2 , which is composed of two silicon-oxygen tetrahedral structures sandwiching aluminum-oxygen tetrahedrons, and connected by oxygen to form a channel-like crystal structure. Because attapulgite has a special chain-layer crystal structure and its unique colloidal properties such as dispersion, water absorption and salt-alkali resistance, and because attapulgite has nano-scale pores and small crystal size, it has good Catalytic and heat resistance properties. [0003] Titanium dioxide is a white solid or powdery amphoteric oxide with good opacity and smoothness, and also has the advantages ...

Claims

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Application Information

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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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