Highly pure brookite type titanium dioxide nanosheet, and preparation method and application thereof

A technology of titanium dioxide and brookite, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of harsh reaction conditions, complicated preparation process, and difficult synthesis, and achieve low alkalinity of the solution, The effect of good repeatability and simple method

Active Publication Date: 2014-12-17
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because brookite is difficult to synthesize, there are few reports on its application and theoretical research.
Although brookite phase synthesis has also been ...

Method used

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  • Highly pure brookite type titanium dioxide nanosheet, and preparation method and application thereof
  • Highly pure brookite type titanium dioxide nanosheet, and preparation method and application thereof
  • Highly pure brookite type titanium dioxide nanosheet, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Potassium titanium oxalate was used as the initial raw material of the titanium source. At room temperature, 5.31 g of potassium titanium oxalate was dissolved in a beaker containing 60 mL of deionized water. After fully stirring, add 10 g of urea, adjust the pH to 8.5, and continue stirring until all the raw materials are dissolved. Then, the above mixed solution was put into a 100 mL reaction kettle, and placed in an oven at 200° C. to react for 12 h. After the reaction was completed, it was fully washed with ethanol and deionized water, and the obtained powder was dried in an oven at 80 °C for 12 h to obtain a white product.

[0033] figure 1 The X-ray diffraction pattern of the titanium dioxide material prepared for this example shows that it is a pure phase brookite structure. figure 2 The transmission electron microscope photograph of the product shows that the product is flake-like particles with a particle size of 100-200 nanometers in length, 20-40 nanomete...

Embodiment 2

[0035] Potassium titanium oxalate was used as the initial raw material of the titanium source. At room temperature, 5.31 g of potassium titanium oxalate was dissolved in a beaker containing 60 mL of deionized water. After fully stirring, add 10 g of urea, adjust the pH to 9, and continue stirring until all the raw materials are dissolved. Then, the above mixed solution was put into a 100 mL reaction kettle and placed in an oven at 160° C. to react for 12 h. After the reaction was completed, it was fully washed with ethanol and deionized water, and the obtained product was dried in an oven at 80° C. for 12 h to obtain a white product.

[0036] The titania material prepared in this example is tested by X-ray diffraction pattern, which shows that the product is a pure-phase brookite structure. The transmission electron microscope photograph of the product shows that the obtained product is flake-like particles with a particle size of 100-180 nm in length, 20-35 nm in width and ...

Embodiment 3

[0038] Ammonium titanium oxalate was used as the initial raw material of the titanium source. At room temperature, 4.14 g of ammonium titanium oxalate was dissolved in a beaker with 60 mL of deionized water. After fully stirring, add 10 g of urea, adjust the pH to 9.5, and continue stirring until all the raw materials are dissolved. Then, the above mixed solution was put into a 100 mL reaction kettle, and placed in an oven at 200° C. to react for 12 h. After the reaction was completed, it was fully washed with ethanol and deionized water, and the obtained powder was dried in an oven at 80 °C for 12 h to obtain a white product.

[0039] Figure 4 The X-ray diffraction pattern of the titanium dioxide material prepared for this example shows that it is a pure phase brookite structure. Figure 5 The transmission electron microscope photograph of the product shows that the product is flake-like particles with a length of 100-200 nm, a width of 30-50 nm and a height of 15-30 nm. ...

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Abstract

The invention discloses a highly pure brookite type titanium dioxide nanosheet photocatalysis material, a preparation method thereof, and an application of the photocatalysis material in the photocatalysis field. The above brookite type titanium dioxide nanosheet is prepared through a hydrothermal technique, has the advantages of mild reaction conditions, low reaction temperature, short reaction time, low solution alkalinity, simple synthetic method, cheap and easily available raw materials and the like, and is suitable for large scale production and application. The brookite type titanium dioxide has high photocatalytic activity in an ultraviolet region in hydrogen production through water photolysis or the field of photodegradation of organic dyes.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and relates to a high-purity brookite-type titanium dioxide nanometer photocatalytic material, a preparation method thereof, and an application in the field of photocatalysis. Background technique [0002] Since 1972 Fujishima and Honda published on TiO in the journal Nature 2 Since the paper on photo-splitting water on electrodes, TiO 2 The use as a catalyst has been intensively studied. In nature, titanium dioxide mainly has three crystal forms, namely anatase, rutile and brookite. Due to anatase and rutile phase TiO 2 The preparation is simple, the theoretical research has been in-depth, and it has been widely used in practical applications. Such as commercialized P25 titanium dioxide. However, due to its difficulty in synthesis, brookite has rarely been reported in application and theoretical research. Although brookite phase synthesis has also been reported in previous studies, these metho...

Claims

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Application Information

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IPC IPC(8): B01J21/06C02F1/30C01G23/053B82Y40/00B82Y30/00
Inventor 李广社车相立李莉萍
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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