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Two-dimensional layered porous hexagonal nanometer titanium dioxide and preparation method and application thereof

A nano-titanium dioxide, two-dimensional layered technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as no two-dimensional layered porous hexagonal nano-TiO2, etc., to achieve repeatability Good and photocatalytic performance

Active Publication Date: 2019-06-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Each method has its own advantages and disadvantages, but unfortunately, no relevant two-dimensional layered porous hexagonal nano-TiO 2 related reports

Method used

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  • Two-dimensional layered porous hexagonal nanometer titanium dioxide and preparation method and application thereof
  • Two-dimensional layered porous hexagonal nanometer titanium dioxide and preparation method and application thereof
  • Two-dimensional layered porous hexagonal nanometer titanium dioxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] First, pour TiSe into a quartz crucible 2 Powder, put it on the heating table; then, feed nitrogen flow rate 80mL / min, air flow rate 20mL / min, set heating temperature to 500°C, heat preservation time to 2h, after the reaction, cool to room temperature with the furnace, white The powder is the target product TiO 2 .

[0036] figure 1 It is the TiO grown according to Example 1 2 In the X-ray diffraction spectrum of nanosheets, no impurity peaks appear, indicating that the product is pure TiO 2 .

[0037] figure 2 It is the TiO grown according to Example 1 2 SEM topography photos, it can be seen that TiO 2 It has a distinct hexagonal outline and a nanoparticle-like surface.

[0038] image 3 It is the visible light absorption picture of Example 1. As the visible light time increases, it is obvious that the absorption peak decreases, indicating that Rh B is constantly being degraded.

[0039] Figure 4 It is the absorptivity picture of Example 1, and it can be s...

Embodiment 2

[0041]Pour TiSe into a quartz crucible 2 Put the powder on the heating platform; the flow rate of argon gas is 30mL / min; the air flow rate is 10mL / min, the heating temperature is set to 300°C, and the holding time is 1h. After the reaction is completed, it is cooled to room temperature with the furnace, white The powder is the target product TiO 2 .

[0042] Figure 5 It is TiO grown according to Example 2 2 X-ray diffraction spectrum, no impurity peaks appear, indicating that the product is pure TiO 2 .

[0043] Figure 6 is the TiO corresponding to Example 2 2 The SEM topography photos, it can be seen that the layered stacked hexagonal TiO 2 There are obvious particles and holes.

Embodiment 3

[0045] Pour TiSe into a quartz crucible 2 Put the powder on the heating platform; the nitrogen flow rate is 10mL / min; the air flow rate is 100mL / min, the heating temperature is set to 450 °C, and the holding time is 5h. After the reaction is completed, it is cooled to room temperature with the furnace, and the white powder body is the target product TiO 2 .

[0046] Figure 7 It is the TiO grown according to Example 3 2 X-ray diffraction spectrum, no impurity peaks appear, indicating that the product is pure TiO 2 , and good crystallinity.

[0047] Figure 8 It is the TiO grown according to Example 3 2 SEM image of nanosheets.

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Abstract

The invention discloses two-dimensional layered porous hexagonal nanometer titanium dioxide and a preparation method and application thereof. A simple one-step heating method is adopted to prepare layered porous hexagon TiO2, which takes two-dimensional nano flake TiSe2 powder as raw materials, and a muffle furnace or a heating platform as heating equipment, in order to perform simple heating to obtain pure two-dimensional layered porous nanostructure hexagon TiO2. Compared with a traditional P25 nanometer powder, under the same illumination time, P25 degrades by 51.3%, and the prepared TiO2 degrades by 82.9%, so the prepared TiO2 has better catalytic degradation ability. The method does not require complex equipment, so the method is simple, efficient, highly repeatable, and does not involve harmful reagents. The prepared titanium dioxide is safe and harmless to a human body, and is especially suitable for industrial mass production.

Description

technical field [0001] The invention belongs to the field of nano-material preparation, and at the same time relates to the application of nano-materials to the field of photocatalysis, in particular to a two-dimensional layered porous hexagonal nano-titanium dioxide and its preparation method and application. Background technique [0002] Nano-TiO 2 It is a very important semiconductor material. It has the advantages of chemical stability, strong oxidation-reduction resistance, corrosion resistance, and non-toxicity, and has become an important functional material in the development of modern industry. It has a particularly important position in the fields of batteries, gas sensors, photocatalysis, electronic components, and high-end cosmetics. Especially in the field of photocatalysis, it can degrade industrial wastewater and dyes harmful to human body and environment into non-toxic and harmless substances under the irradiation of sunlight. Therefore, titanium dioxide h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08B82Y40/00B01J21/06
Inventor 葛万银焦思怡常哲徐美美张塨凡施金豆高文兴阿里
Owner SHAANXI UNIV OF SCI & TECH
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