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Preparation method and application for palladium-modified titanium dioxide with three-dimensional flower-like structure exposure [001] crystal face

A three-dimensional flower-shaped, titanium dioxide technology, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low photocatalytic activity of titanium dioxide, limiting the practical application of titanium dioxide, and low solar energy utilization , to achieve good photodegradation effect, inhibit photogenerated electron-hole recombination, and broaden the absorption range

Inactive Publication Date: 2015-11-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the bandgap of titanium dioxide is wide, and the utilization rate of solar energy is low; the photogenerated electrons and holes of titanium dioxide are easy to recombine, and these defects lead to low photocatalytic activity of titanium dioxide, which limits the practical application of titanium dioxide as a photocatalyst

Method used

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  • Preparation method and application for palladium-modified titanium dioxide with three-dimensional flower-like structure exposure [001] crystal face
  • Preparation method and application for palladium-modified titanium dioxide with three-dimensional flower-like structure exposure [001] crystal face
  • Preparation method and application for palladium-modified titanium dioxide with three-dimensional flower-like structure exposure [001] crystal face

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Effect test

Embodiment 1

[0032] Such as Figure 1-10Shown, the preparation method of the titanium dioxide that the palladium-modified three-dimensional flower-like structure exposes [001] crystal face is characterized in that: comprising: adding 10mL isobutanol, 1mL butyl titanate in the beaker, magnetic stirring 30min, after mixing uniformly Then add 30mL of isobutanol and 0.4mL of hydrofluoric acid, continue to stir for 30min, mix evenly, transfer to a 50mL autoclave lined, seal the reaction kettle, heat at a constant temperature of 200°C for 20h, and cool the autoclave to room temperature naturally. The obtained sample was washed with deionized water, and washed with 0.1M NaOH solution to remove surface fluorine, adjusted to neutral pH, and dried to obtain TiO 2 -001 photocatalyst.

[0033] Such as Figure 1~2 As shown, the TiO was observed with a scanning electron microscope (SEM) 2 Morphology of -001 catalyst. The three-dimensional flower-like TiO obtained by the above method 2 It is compose...

Embodiment 2

[0041] The preparation method of the titanium dioxide with the palladium-modified three-dimensional flower-like structure exposing the [001] crystal plane, is characterized in that: comprising: adding 10mL isobutanol and 3mL butyl titanate into a beaker, magnetically stirring for 30min, and then adding 30mL Isobutanol, 0.4mL hydrofluoric acid, continue to stir for 30min, mix evenly, transfer to a 50mL autoclave lined, seal the reaction kettle, heat at 200°C for 20h, cool the autoclave to room temperature naturally, and use the obtained sample Wash with deionized water, and wash with 0.1M NaOH solution to remove surface fluorine, adjust pH to neutral, and dry to obtain TiO 2 catalyst of light.

[0042] Such as image 3 As shown, the TiO was observed with a scanning electron microscope (SEM) 2 Morphology of the catalyst, the prepared TiO 2 TiO presents sheet-like stacking and fails to form a uniformly dispersed three-dimensional flower-like structure 2 .

Embodiment 3

[0044] Such as Figure 1~2 Shown, the preparation method of the titanium dioxide that the palladium-modified three-dimensional flower-like structure exposes [001] crystal face is characterized in that: comprising: adding 10mL isobutanol, 1mL butyl titanate in the beaker, magnetic stirring 30min, after mixing uniformly Then add 30mL of isobutanol and 0.4mL of hydrofluoric acid, continue to stir for 30min, mix evenly, transfer to a 50mL autoclave lined, seal the reaction kettle, heat at a constant temperature of 200°C for 20h, and cool the autoclave to room temperature naturally. The obtained sample was washed with deionized water, and washed with 0.1M NaOH solution to remove surface fluorine, adjusted to neutral pH, and dried to obtain TiO 2 catalyst of light.

[0045] Weigh 7.084mgPdCl 2 , add 6M HCl solution to prepare 1g / LH 2 PdCl 4 solution, add 50mgTiO to the three-necked flask 2 -001, 100mL ethanol, use 300W xenon lamp (λ=365nm) ultraviolet light reduction irradiatio...

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Abstract

The invention discloses a preparation method and an application for palladium-modified titanium dioxide with a three-dimensional flower-like structure exposure [001] crystal face. The preparation method is characterized by comprising: a step I, preparing titanium dioxide with a three-dimensional flower-like structure exposure [001] crystal face; and a step II, preparing palladium-modified titanium dioxide with a three-dimensional flower-like structure exposure [001] crystal face. According to the preparation method and the application for the palladium-modified titanium dioxide with the three-dimensional flower-like structure exposure [001] crystal face provided by the invention, the method is simple and easy to implement; conditions are gentle; operation is simple; the preparation period is short; the preparation success rate is high; photocatalytic activity under a visible light condition is high; raw materials are economical and available; and the palladium-modified titanium dioxide can realize mass production, is easy to recycle and reuse, and can be applied to photocatalytic degradation on wastewater pollutants.

Description

technical field [0001] The invention relates to a preparation method and application of a palladium-modified titanium dioxide with a three-dimensional flower-like structure exposed to a [001] crystal plane, and belongs to the technical field of photocatalytic materials and degradation of organic pollutants. Background technique [0002] With the vigorous development of industry, the problem of wastewater pollution is becoming more and more serious. Photocatalytic technology is a wastewater treatment technology developed in recent years, and its application research in environmental protection and new energy has developed rapidly. Photocatalyst is a substance that causes a catalytic reaction under light irradiation. Through the photocatalytic reaction, hydroxyl radicals and super oxygen ions with strong oxidizing ability are generated to degrade and decompose organic pollutants. [0003] Titanium dioxide (TiO 2 ) is a well-studied semiconductor photocatalyst, which is widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/02C02F1/30B01J35/00
CPCY02W10/37
Inventor 白雪华祖林吕玲玲黄欣张琪张佳楠
Owner HOHAI UNIV
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