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Expose the tio of the 001 and 101 crystal planes 2 / sepiolite composite gel and preparation method thereof

A composite gel, sepiolite technology, applied in chemical instruments and methods, water/sludge/sewage treatment, other chemical processes, etc., can solve problems such as the inability to solve the problem of TiO2 aggregation, and achieve solid-liquid separation difficulties, The effect of novel structure and strong photocatalytic performance

Active Publication Date: 2021-02-05
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot solve the TiO 2 aggregation problem

Method used

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  • Expose the tio of the 001 and 101 crystal planes <sub>2</sub> / sepiolite composite gel and preparation method thereof
  • Expose the tio of the 001 and 101 crystal planes <sub>2</sub> / sepiolite composite gel and preparation method thereof
  • Expose the tio of the 001 and 101 crystal planes <sub>2</sub> / sepiolite composite gel and preparation method thereof

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 hours. Obtain TiO with exposed 001 and 101 crystal planes 2 / Sepiolite Composite Gel.

[0075] The TiO that this embodimen...

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Abstract

The present invention relates to a kind of TiO 2 / Sepiolite composite gel and preparation method thereof. The composite gel provided by the invention is a three-dimensional network structure, wherein the TiO in the gel 2 The 001 crystal plane and the 101 crystal plane are exposed, and the exposure ratio of the 001 crystal plane is 5‑50%. The preparation method of the composite gel of the present invention comprises: hydrolysis of titanium source, preparation of sepiolite dispersion, preparation of surfactant aqueous solution, mixing the above three kinds of mixed solutions, and performing solvothermal reaction, that is, to obtain the exposed 001 and 101 crystal planes TiO 2 / Sepiolite Composite Gel. TiO provided by the invention 2 / Sepiolite composite gel structure is novel, and promotes TiO 2 dispersion, has strong adsorption performance and photocatalytic activity, and overcomes the pure TiO 2 The problem of powder solid-liquid separation is difficult, and it has broad application prospects in the field of purification.

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 Patents(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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