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Preparation method of bismuth titanate nanosheet

A technology of nanosheets and bismuth titanate, which is applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as troublesome product handling, and achieve the optimization of preparation process conditions, easy large-scale production, and simple preparation process. Effect

Inactive Publication Date: 2018-10-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, the preparation of Bi by hydrothermal method 4 Ti 3 o 12 In the process of nanosheets, it is often necessary to add additional surface modifiers, which makes the subsequent processing of the product more troublesome.

Method used

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  • Preparation method of bismuth titanate nanosheet
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  • Preparation method of bismuth titanate nanosheet

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 1) Measure and weigh 6mmol tetrabutyl titanate and dissolve it in 60mL of absolute ethanol solvent to form a tetrabutyl titanate absolute ethanol solution with a concentration of 0.1mol / L, then drop in deionized water to hydrolyze to obtain the hydroxyl group of titanium Oxide precipitation, wash with absolute ethanol and deionized water;

[0042] 2) Disperse the precipitated titanium oxyhydroxide prepared in step 1) in a small amount of deionized water, add KOH tablet, and after stirring fully, adjust the volume to 40ml with deionized water to form a potassium hydroxide concentration of 8mol / L, Ti 4+ A suspension with an ion concentration of 0.15mol / L;

[0043] 3) Transfer the suspension prepared in step 2) to a hydrothermal reaction kettle, place it in a hydrothermal reaction at 200°C for 16 hours, and then obtain fresh potassium titanate nanowire powder through subsequent treatment. The SEM of potassium titanate nanowires photos such as figure 1 shown;

[0044] 4...

Embodiment 2

[0049] 1) Measure and weigh 9 mmol tetrabutyl titanate and dissolve it in 60 mL of absolute ethanol solvent to form a tetrabutyl titanate absolute ethanol solution with a concentration of 0.15 mol / L, then drop in deionized water to hydrolyze to obtain the hydroxyl group of titanium Oxide precipitation, wash with absolute ethanol and deionized water;

[0050] 2) Disperse the precipitated titanium oxyhydroxide prepared in step 1) in a small amount of deionized water, add KOH tablet, and after stirring fully, adjust the volume to 40ml with deionized water to form a potassium hydroxide concentration of 10mol / L, Ti 4+ A suspension with an ion concentration of 0.225mol / L;

[0051] 3) Transfer the suspension prepared in step 2) to a hydrothermal reaction kettle, place it in a hydrothermal reaction at 200°C for 24 hours, and then obtain fresh potassium titanate nanowire powder through subsequent treatment;

[0052] 4) Disperse the potassium titanate nanowires obtained in step 3) in ...

Embodiment 3

[0057] 1) Measure and weigh 9 mmol tetrabutyl titanate and dissolve it in 60 mL of absolute ethanol solvent to form a tetrabutyl titanate absolute ethanol solution with a concentration of 0.15 mol / L, then drop in deionized water to hydrolyze to obtain the hydroxyl group of titanium Oxide precipitation, wash with absolute ethanol and deionized water;

[0058] 2) Disperse the precipitated titanium oxyhydroxide prepared in step 1) in a small amount of deionized water, add KOH tablet, and after stirring fully, adjust the volume to 40ml with deionized water to form a potassium hydroxide concentration of 10mol / L, Ti 4+ A suspension with an ion concentration of 0.225mol / L;

[0059] 3) Transfer the suspension prepared in step 2) to a hydrothermal reaction kettle, place it in a hydrothermal reaction at 200°C for 20 hours, and then obtain fresh potassium titanate nanowire powder through subsequent treatment;

[0060] 4) Disperse the potassium titanate nanowires obtained in step 3) in ...

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Abstract

The invention relates to a preparation method of bismuth titanate nanosheet. The preparation method comprises the following steps: (1) adding oxyhydroxide of titanium and KOH into water, uniformly stirring to obtain suspension liquid, performing the primary hydrothermal reaction, and obtaining a potassium titanate nanowire; (2) dispersing the potassium titanate nanowire into water, adding Bi(NO3)3and KOH, uniformly stirring to obtain a precursor solution, performing a second hydrothermal reaction, and obtaining the Bi4Ti3O12 nanosheet. By adopting the preparation method, no surfactant is needed, the subsequent treatment process of a product is reduced, and the preparation method is simple in preparation process, easy to control, low in cost and easy in mass production.

Description

technical field [0001] The invention relates to the field of preparation of bismuth titanate, in particular to a preparation method of bismuth titanate nanosheets. Background technique [0002] The problem of environmental pollution is becoming more and more serious, among which the problem of water pollution is the top priority of environmental pollution. The development of effective sewage treatment technology has always been the focus of environmental protection. Among the many solutions, semiconductor photocatalytic degradation technology is particularly outstanding. Using the principle of semiconductor photocatalysis, organic pollutants can be degraded into non-toxic small molecules. The actual operation is simple and the secondary pollution is very small. This technology has great potential. Looking for new and efficient photocatalysts is the key to the large-scale development of this technology. [0003] Bi 4 Ti 3 o 12 Due to its special layered crystal structure,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G29/00C01P2002/72C01P2004/03C01P2004/62C01P2004/64
Inventor 徐刚江婉陈同舟皇甫统帅韩高荣
Owner ZHEJIANG UNIV
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