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TiO2/sepiolite composite gel with 001 and 101 crystal planes exposed and preparation method of TiO2/sepiolite composite gel

A technology of composite gel and sepiolite, which is applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve problems such as inability to solve the problem of TiO2 aggregation, and achieves the solution of difficult solid-liquid separation, low production cost, Structured novel effect

Active Publication Date: 2018-07-20
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot solve the TiO 2 aggregation problem

Method used

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  • TiO2/sepiolite composite gel with 001 and 101 crystal planes exposed and preparation method of TiO2/sepiolite composite gel
  • TiO2/sepiolite composite gel with 001 and 101 crystal planes exposed and preparation method of TiO2/sepiolite composite gel
  • TiO2/sepiolite composite gel with 001 and 101 crystal planes exposed and preparation method of TiO2/sepiolite composite gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Add a certain amount of titanium source into the acetic acid solution, stir and dissolve at 40°C for 24 hours, wherein the mass ratio of titanium to acetic acid (analytical pure) is 0.28:40, and the titanium source in this example is tetrabutyl titanate ester;

[0053] (2) A certain amount of sepiolite is ultrasonically dispersed in acetic acid solution at 100W for 1h, and then stirred at a stirring speed of 200r / min for 0.5h, wherein the mass ratio of sepiolite to acetic acid is 1:300;

[0054] (3) dissolving CTAB in water at 30°C, wherein the mass ratio of CTAB to water is 9:1000;

[0055] (4) Mix the solutions prepared in steps (1), (2) and (3), and stir at 40°C for 40min;

[0056] (5) Put the solution prepared in step (4) into a polytetrafluoroethylene reactor for solvothermal reaction, the solvothermal temperature is 140° C., and the solvothermal time is 24 hours. Obtain TiO with exposed 001 and 101 crystal planes 2 / Sepiolite Composite Gel.

[0057] The T...

Embodiment 2

[0063] (1) Add a certain amount of titanium source into the acetic acid solution, stir and dissolve at 40°C for 24 hours, wherein the mass ratio of titanium to acetic acid is 0.28:40, and the titanium source in this embodiment is tetrabutyl titanate;

[0064] (2) A certain amount of sepiolite is ultrasonically dispersed in acetic acid solution at 100W for 1h, and then stirred at a stirring speed of 200r / min for 0.5h, wherein the mass ratio of sepiolite to acetic acid is 1:300;

[0065] (3) dissolving CTAB in water at 30°C, wherein the mass ratio of CTAB to water is 9:1000;

[0066] (4) Mix the solutions prepared in steps (1), (2) and (3), and stir at 40°C for 40min;

[0067] (5) Put the solution prepared in step (4) into a polytetrafluoroethylene reactor for solvothermal reaction, the solvothermal temperature is 100° C., and the solvothermal time is 24 hours. Obtain TiO with exposed 001 and 101 crystal planes 2 / Sepiolite Composite Gel.

[0068] figure 2 a is the TiO pre...

Embodiment 3

[0070] (1) Add a certain amount of titanium source into the acetic acid solution, stir and dissolve at 40°C for 24 hours, wherein the mass ratio of titanium to acetic acid is 0.28:40, and the titanium source in this embodiment is tetrabutyl titanate;

[0071] (2) A certain amount of sepiolite is ultrasonically dispersed in acetic acid solution at 100W for 1h, and then stirred at a stirring speed of 200r / min for 0.5h, wherein the mass ratio of sepiolite to acetic acid is 1:300;

[0072] (3) dissolving CTAB in water at 30°C, wherein the mass ratio of CTAB to water is 9:1000;

[0073] (4) Mix the solutions prepared in steps (1), (2) and (3), and stir at 40°C for 40min;

[0074] (5) Put the solution prepared in step (4) into a polytetrafluoroethylene reactor for solvothermal reaction, the solvothermal temperature is 160° C., and the solvothermal time is 24 h. Obtain TiO with exposed 001 and 101 crystal planes 2 / Sepiolite Composite Gel.

[0075] The TiO that this embodiment pr...

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Abstract

The invention relates to TiO2 / sepiolite composite gel and a preparation method thereof. The composite gel is of a 3D net structure, wherein 001 and 101 crystal planes of TiO2 in the composite gel areexposed, and 5%-50% of the 001 crystal plane is exposed. The preparation method of the composite gel comprises the following steps: a Ti source is hydrolyzed; a sepiolite dispersion is prepared; an aqueous surfactant solution is prepared; the three obtained mixed solutions are mixed and subjected to a solvothermal reaction, and the TiO2 / sepiolite composite gel with the 001 and 101 crystal planes exposed is obtained. The TiO2 / sepiolite composite gel is novel in structure, has high adsorptive property and photocatalytic activity and has broad application prospect in the purification field, TiO2dispersion is promoted, and the problem that solid-liquid separation is difficult for pure TiO2 powder is solved.

Description

technical field [0001] The invention belongs to the field of composite material preparation, in particular to a TiO exposed to {001} and {101} crystal planes 2 / Sepiolite composite gel and preparation method thereof. Background technique [0002] Hydrogel-based photocatalysts have attracted extensive attention due to their three-dimensional network structure, large specific surface area, and excellent adsorption capacity, making them one of the best candidates for solar energy conversion or environmental purification. The three-dimensional network gel structure is conducive to the refraction and reflection of light, which can greatly improve the utilization rate of light. It can also provide enough space for molecular adsorption and promote efficient mass transfer. In recent years, many researchers have synthesized TiO with a three-dimensional network structure. 2 / Graphene composite gel (J.Hazard.Mater.205-206(2012)229-235), Bi 2 WO 6 / graphene composite gel (App1.Cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J35/10B01J20/12B01J20/28B01J20/30C02F1/28C02F1/30C02F1/32C02F101/34C02F101/38
CPCB01J20/12C02F1/281C02F1/30C02F1/32B01J20/28047B01J21/16C02F2101/38C02F2101/40C02F2101/34C02F2305/10B01J35/23B01J35/615B01J35/39
Inventor 冀志江刘蕊蕊王静张琎珺
Owner CHINA BUILDING MATERIALS ACAD
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