Preparation and application method of titanium dioxide loaded highly dispersed platinum composite photocatalytic material

A composite photocatalysis and titanium dioxide technology, which is applied in the field of titanium dioxide nanosheet-loaded noble metal composite materials and titanium dioxide photocatalysis, can solve the problems of cumbersome methods and high reagent consumption, achieve good repeatability, improve separation efficiency, and uniform particle size distribution Effect

Inactive Publication Date: 2016-12-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is cumbersome, and consumes a lot of reagents, so

Method used

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  • Preparation and application method of titanium dioxide loaded highly dispersed platinum composite photocatalytic material
  • Preparation and application method of titanium dioxide loaded highly dispersed platinum composite photocatalytic material
  • Preparation and application method of titanium dioxide loaded highly dispersed platinum composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) 5ml of hydrofluoric acid with a mass fraction of 40% was added to 25ml of tetrabutyl titanate, stirred evenly at 25°C, put into a 100ml autoclave, and reacted at 200°C for 20 hours. After the reaction is completed, it is washed with deionized water and ethanol until neutral, and dried to obtain titanium dioxide nanosheet powder.

[0027] (2) Measure 10 ml of ethylene glycol in a round-bottomed flask and heat it in an oil bath at 110° C. for 30 min, then condense and reflux to remove excess water. Next, weigh 0.25 g of the prepared titanium dioxide nanosheet powder, disperse it into 5 ml of ethylene glycol and disperse it uniformly with ultrasonic waves, then add it to the above round-bottomed flask and heat at 110 °C for 30 min, and condense and reflux to remove excess water. At the same time, 0.033g of chloroplatinic acid and 0.225g of polyvinylpyrrolidone were weighed, and then added to 1ml of ethylene glycol solution respectively, ultrasonicated for 30min, and ch...

Embodiment 2

[0031] The preparation method of the highly dispersed platinum quantum dot-supported titanium dioxide nanosheet composite catalyst, the steps are the same as those in Example 1, the difference is: the mass of chloroplatinic acid used is 0.017g

[0032] Weigh 0.02 g of the titanium dioxide nanosheet-supported highly dispersed platinum quantum dot composite catalyst prepared above for the photocatalytic degradation of rhodamine B. The concentration of rhodamine B is 5 mg·L. -1 , the degradation rate of Rhodamine B was 91.0% after UV irradiation for 80 min.

Embodiment 3

[0034] The preparation method of the highly dispersed platinum quantum dot-supported titanium dioxide nanosheet composite catalyst has the same steps as those in Example 1, except that the mass of chloroplatinic acid used is 0.083 g.

[0035]Weigh 0.02 g of the titanium dioxide nanosheet-supported highly dispersed platinum quantum dot composite catalyst prepared above for the photocatalytic degradation of rhodamine B. The concentration of rhodamine B is 5 mg·L. -1 , the degradation rate of Rhodamine B was 66.4% after UV irradiation for 80 min.

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Abstract

The invention discloses a preparation and application method of a titanium dioxide loaded highly dispersed platinum composite photocatalytic material, and belongs to the field of titanium dioxide photocatalysis. The preparation method comprises following steps: tetrabutyl titanate and hydrofluoric acid are stirred to be uniform at room temperature, an obtained mixture is reacted for 15 to 24h at 150 to 220 DEG C in a hydrothermal reaction kettle, and titanium dioxide nanosheets are obtained via separation, washing, and drying; the titanium dioxide nanosheets are dispersed in absolute ethanediol uniformly, and is subjected to reflux condensation stirring for 10 to 60min at 80 to 150 DEG C, polyvinylpyrrolidone and chloroplatinic acid are added, an obtained mixed material is subjected to reflux condensation stirring for 3 to 10h at 80 to 150 DEG C, and the titanium dioxide nanosheet loaded platinum nanoparticle composite material is obtained via separation, washing, and drying. The preparation method is capable of obtaining titanium dioxide nanosheets with a morphology easy to control; ethanediol is taken as a reducing agent, and 2 to 3nm platinum quantum dots with uniform particle size and high dispersity are obtained; the preparation parameters are easy to control; and repeatability is high. The titanium dioxide loaded highly dispersed platinum composite photocatalytic material is especially suitable to be used for catalytic degradation organic dyes under ultraviolet irradiation, and relatively high degradation rate is achieved.

Description

technical field [0001] The invention relates to the field of titanium dioxide photocatalysis, in particular to the field of titanium dioxide nanosheet-supported precious metal composite materials. The catalyst prepared by the method is particularly suitable for catalytic degradation of organic dyes (such as rhodamine B) under ultraviolet light irradiation, and achieves a high degradation rate. Background technique [0002] At present, titanium dioxide photocatalyst has attracted extensive attention of researchers at home and abroad due to its advantages of stability, non-toxicity, and low price. It has broad application prospects in the fields of wastewater treatment, air purification, antibacterial deodorization, and self-cleaning. Anatase-phase single-crystal TiO2 nanosheets have attracted much attention due to the large proportion of high-energy active surfaces (001). Theoretical and experimental studies show that compared with other active surfaces, the (001) surface ca...

Claims

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Application Information

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IPC IPC(8): B01J23/42C02F1/32C02F101/30
CPCB01J23/42B01J35/004B01J35/0093B01J35/023C02F1/32C02F2101/308
Inventor 王戈刘欣党蕊王芃刘丽萍高鸿毅董文钧
Owner UNIV OF SCI & TECH BEIJING
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