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Preparation method of high-activity platinum-loaded TiO2 nanotube photocatalyst

A photocatalyst and nanotube technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as reducing catalyst adsorption and ultraviolet light absorption, and avoid bed effects and photocatalytic efficiency. Improve and improve the effect of photon quantum efficiency

Inactive Publication Date: 2012-01-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the platinum-loaded TiO prepared by this method 2 The platinum particles on the nanotubes are distributed on the inner and outer surfaces of the nanotubes, and the platinum particles on the outer surface will occupy the adsorption active sites, which will reduce the catalyst's adsorption of reactants and absorption of ultraviolet light, and its application is still limited.

Method used

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  • Preparation method of high-activity platinum-loaded TiO2 nanotube photocatalyst
  • Preparation method of high-activity platinum-loaded TiO2 nanotube photocatalyst

Examples

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Effect test

Embodiment 1

[0023] Weigh 1g TiO 2 Powder, add 40mL of 10mol / L NaOH solution, hydrothermally react in the reactor at 150℃ for 5h, then cool to room temperature, grind the solid matter in the reactor, and then continue to react at the same temperature for 48h to obtain After cooling, adjust the pH value of the mixed solution to 2.5 with hydrochloric acid, stir and pickle for 3 hours, wash with distilled water to neutrality and dry, and then roast it at 500°C for 5 hours (heating rate: 1°C / min) to obtain Anatase TiO 2 nanotube.

[0024] Anatase TiO 2 Nanotube is the matrix, add chloroplatinic acid, stir to make it evenly adsorb on TiO 2 The inner and outer surfaces of the nanotubes are then washed with distilled water to remove the chloroplatinic acid adsorbed on the outer surface of the nanotubes, and the amount of platinum on the inner surface of the nanotubes is controlled to 0.57%, and then dried to obtain platinum-loaded TiO 2 Nanotube precursors. Weigh 0.5g of platinum-loaded TiO 2 For th...

Embodiment 2

[0028] In Example 1, other conditions remain unchanged, and the hydrothermal reaction temperature is changed to 110°C. The resulting platinum-loaded TiO 2 The removal rate of the nanotube photocatalyst to the rhodamine B solution was lower than that of Example 1.

Embodiment 3

[0030] In Example 1, other conditions remain unchanged, and the hydrothermal reaction temperature is changed to 180°C. The resulting platinum-loaded TiO 2 The removal rate of the nanotube photocatalyst to the rhodamine B solution was lower than that of Example 1.

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Abstract

The invention discloses a preparation method of a platinum-loaded TiO2 nanotube photocatalyst with high-efficiency photocatalysis activity, which is characterized by comprising the following steps of: taking low-cost TiO2 and sodium hydroxide as raw materials; milling in the process of hydro-thermal reaction; then acid washing and roasting to obtain an anatase TiO2 nanotube as a carrier; enablingthe inner surface of the anatase TiO2 nanotube to absorb chloroplatinic acid; and enabling the inner surface of the nanotube to be loaded with platinum particles by taking ethanol as a hole depletionagent by adopting a photo-reduction settling method. The light quantum efficiency is improved on the premise that the adsorption capacity for pollutants is not influenced. Compared with common TiO2 photocatalysts, the platinum-loaded TiO2 nanotube catalyst has higher photocatalysis activity.

Description

Technical field [0001] The invention belongs to the preparation technology of photocatalyst, especially a kind of high activity platinum-carrying TiO 2 Preparation method of nanotube photocatalyst. Background technique [0002] Photocatalysis technology is a kind of advanced oxidation technology (AOPs), which has received extensive attention in the treatment of organic wastewater, especially high-concentration, refractory wastewater in recent years. The main principle is based on the fact that under ultraviolet light, the valence band and conduction band of the photocatalyst respectively generate highly active hole-electron pairs. The holes can deprive the adsorbed substance on the surface of the catalyst to make the substance that does not absorb light. Being oxidized, the electron acceptor is reduced by accepting electrons on the surface. This technology is not selective to the degraded pollutants and does not produce secondary pollution. [0003] Photocatalyst is an important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J21/06B01J37/08B01J37/16C02F1/32A62D3/176A62D101/28C02F101/38
Inventor 江芳周菊霞安立超孙秀云郑寿荣许昭怡
Owner NANJING UNIV OF SCI & TECH
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