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Method for loading gold nanoparticles on titanium dioxide nanotube

A technology of gold nanoparticles and titanium dioxide, which is applied in the field of preparation of nano-titanium dioxide catalysts, can solve the problems of low loading rate, cumbersome methods, and high reaction conditions, and achieve the effects of controllable loading, simple process, and simple equipment

Inactive Publication Date: 2014-03-26
HEFEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the purpose of the present invention is to basically overcome the defects that the existing method of loading gold nanoparticles on titanium dioxide nanotubes is relatively complicated, the reaction conditions are high, and the load rate is low, and a kind of process is simple, and the equipment A New Method for Loading Gold Nanoparticles on Titanium Dioxide Nanotubes with Low Requirements and High Loading Rate

Method used

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  • Method for loading gold nanoparticles on titanium dioxide nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 150ml ethyl titanate and 75ml n-butanol evenly and add to 1000ml HNO with a pH value of 3.5 3 solution, stirred at room temperature for 15 hours, transferred to a reaction kettle for 5 hours at 180°C, and the product was cooled, filtered, washed, and dried to obtain rutile TiO 2 Nanoparticles; 20g rutile TiO 2 Add nanoparticles into 1000ml of 10mol / L NaOH solution, stir evenly, transfer to a sealed reaction kettle, heat to 110°C for 36 hours, cool the product after taking it out, ultrasonically disperse, filter, wash, and dry to obtain TiO 2 Nanotube; 20gTiO 2 Add nanotubes to 1000ml 50% thioglycolic acid solution, stir for 3h, then add 30ml0.1mol / lHAuCl 4 solution, stirred for 3 hours, added 400ml of 1% trisodium citrate solution, transferred to a reaction kettle at 120°C for 5 hours, the product was cooled, filtered, washed, and dried to obtain TiO doped with precious metal gold. 2 nanotube.

Embodiment 2

[0018] Mix 200ml ethyl titanate and 80ml n-butanol evenly and add to 1000ml HNO with a pH value of 4 3 solution, stirred at room temperature for 15 h, transferred to a reaction kettle at 200 ° C for 6 h, and the product was cooled, filtered, washed, and dried to obtain rutile TiO 2 Nanoparticles; 50g rutile TiO 2 Add nanoparticles into 1000ml of 10mol / L NaOH solution, stir evenly, transfer to a sealed reaction kettle, heat to 110°C for 48 hours, cool the product after taking it out, ultrasonically disperse, filter, wash, and dry to obtain TiO 2 Nanotube; 50gTiO 2 Add nanotubes to 1000ml 50% thioglycolic acid solution, stir for 3h, then add 50ml0.1mol / lHAuCl 4 solution, stirred for 3 hours, added 500ml of 1% trisodium citrate solution, transferred to a reaction kettle at 120°C for 5 hours, the product was cooled, filtered, washed, and dried to obtain TiO doped with precious metal gold. 2 nanotube.

[0019]

Embodiment 3

[0021] Mix 50ml ethyl titanate and 20ml n-butanol evenly and add to 1000ml HNO with a pH value of 3 3 solution, stirred at room temperature for 10 h, transferred to a reaction kettle for 4 h at 120 ° C, and the product was cooled, filtered, washed, and dried to obtain rutile TiO 2 nanoparticles; 1 g of rutile TiO 2 Add nanoparticles into 1000ml of 10mol / L NaOH solution, stir evenly, transfer to a sealed reaction kettle, heat to 110°C for 12 hours, cool the product after taking it out, ultrasonically disperse, filter, wash, and dry to obtain TiO 2 Nanotubes; 1gTiO 2 Add nanotubes to 1000ml 50% thioglycolic acid solution, stir for 1h, then add 10ml0.1mol / lHAuCl 4 solution, stirred for 1h, added 200ml of 1% trisodium citrate solution, transferred to a reaction kettle at 120°C for 1h, the product was cooled, filtered, washed, and dried to obtain TiO doped with precious metal gold. 2 nanotube.

[0022]

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Abstract

The invention discloses a method for loading gold nanoparticles on a titanium dioxide nanotube. Butyl titanate and butanol are used as raw materials to prepare rutile phase titanium dioxide powder, a hydrothermal method is adopted for synthesizing the rutile phase titanium dioxide powder into the titanium dioxide nanotube, HAuCl4 solution and trisodium citrate solution are added into mercaptoacetic acid solution containing the rutile phase titanium dioxide powder for reaction under an acidic condition to obtain the titanium dioxide nanotube with the surface loaded with Au. According to the method, the process is simple, the equipment requirement is low, the loading rate is high.

Description

technical field [0001] The invention relates to a preparation method of nano titanium dioxide catalyst. Background technique [0002] Titanium dioxide nanotubes are a kind of titanium dioxide nanomaterials. Compared with titanium dioxide nanopowders and titanium dioxide nanofilms, they have a larger specific surface area and stronger adsorption capacity, so they have excellent photocatalytic properties. Titanium dioxide nanotubes have strong photocatalytic properties and can be made into catalysts. They have good degradation ability for most pollutants in water. After the titanium dioxide nanotubes are doped with metal, the surface area of ​​the titanium dioxide photocatalyst is increased and the photocatalytic efficiency of the titanium dioxide catalyst is improved; the carrier is fixed to be more convenient to use and improve the use efficiency of light energy, and facilitate the recycling of the catalyst. There are many methods for depositing precious metals on the surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J35/02B01J35/00
Inventor 朱金苗李双
Owner HEFEI NORMAL UNIV
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