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Noble metal silver deposition-polypyrrole sensitization hollow titanium dioxide nano photocatalyst and preparation method thereof

A nano-photocatalyst, titanium dioxide technology, applied in the field of preparation of new photocatalytic materials, can solve the problems that have not yet been seen and limit the application of industrialization, and achieve the effects of low cost, simple preparation and cost reduction

Inactive Publication Date: 2012-08-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its large forbidden band width, the photoresponse range only stays in the ultraviolet region, and this part of energy accounts for less than 4% of sunlight, which limits industrial applications.
However, there has been no report on noble metal silver deposition-polypyrrole sensitized hollow titanium dioxide nanophotocatalysts

Method used

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  • Noble metal silver deposition-polypyrrole sensitization hollow titanium dioxide nano photocatalyst and preparation method thereof
  • Noble metal silver deposition-polypyrrole sensitization hollow titanium dioxide nano photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0026] 1) Prepare carbon spheres by hydrothermal synthesis of 0.15 g / ml glucose solution at a hydrothermal temperature of 180 °C for 8 h;

[0027] 2) Hydrolyze butyl titanate into titanium dioxide sol by sol-gel method, and load it on the surface of carbon spheres prepared in step 1) by stirring, the mass ratio of butyl titanate to carbon spheres is 10:1, prepare C / titanium dioxide microspheres;

[0028] 3) Calcining the C / titanium dioxide microspheres prepared in step 2) at 350 °C for 2 h to obtain hollow titanium dioxide microspheres;

[0029] 4) Add silver nitrate to the solution of hydrochloric acid with a concentration of 1 mol / l to oxidize pyrrole, and finally produce polypyrrole and silver by chemical in situ polymerization, and load the reaction product into the hollow titanium dioxide microstructure prepared in step 3) by stirring. On the surface of the sphere, the molar ratios of pyrrole and hollow titanium dioxide microspheres in the synthesis system, pyrrole and ...

Embodiment 3

[0032] 1) Prepare carbon spheres by hydrothermal synthesis of 0.5 g / ml glucose solution at a hydrothermal temperature of 180 °C for 8 h;

[0033] 2) Hydrolyze butyl titanate into titanium dioxide sol by sol-gel method, and load it on the surface of carbon spheres prepared in step 1) by stirring, the mass ratio of butyl titanate to carbon spheres is 10:1, prepare C / titanium dioxide microspheres;

[0034] 3) Calcining the C / titanium dioxide microspheres prepared in step 2) at 450°C for 2 h to obtain hollow titanium dioxide microspheres;

[0035] 4) Add silver nitrate to the solution with a hydrochloric acid concentration of 1.5 mol / l to oxidize pyrrole, and finally produce polypyrrole and silver by chemical in situ polymerization, and load the reaction product to the hollow titanium dioxide microstructure prepared in step 3) by stirring. On the surface of the sphere, the molar ratios of pyrrole and hollow titanium dioxide microspheres in the synthesis system, pyrrole and silve...

Embodiment 4

[0038] 1) Prepare carbon spheres by hydrothermal synthesis of 0.15 g / ml glucose solution at a hydrothermal temperature of 150 °C for 8 h;

[0039] 2) Hydrolyze butyl titanate into titanium dioxide sol by sol-gel method, and load it on the surface of carbon spheres prepared in step 1) by stirring, the mass ratio of butyl titanate to carbon spheres is 10:1, prepare C / titanium dioxide microspheres;

[0040] 3) Calcining the C / titanium dioxide microspheres prepared in step 2) at 450 °C for 2 h to obtain hollow titanium dioxide microspheres;

[0041] 4) Add silver nitrate to the solution with a hydrochloric acid concentration of 0.5 mol / l to oxidize pyrrole, and finally produce polypyrrole and silver as the product by chemical in situ polymerization, and load the reaction product into the hollow titanium dioxide microstructure prepared in step 3) by stirring. The surface of the sphere, the molar ratio of pyrrole and hollow titanium dioxide microspheres in the synthesis system, py...

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Abstract

The invention discloses a preparation method of a noble metal silver deposition-polypyrrole sensitization hollow titanium dioxide nano photocatalyst, which comprises the following steps: hydrothermally synthesizing nano carbon spheres from glucose; by using the carbon spheres as a template, supporting a titanium dioxide film on the surface of the carbon spheres by a sol-gel method to prepare C-titanium dioxide microspheres; calcining the microspheres to prepare hollow titanium dioxide nano microspheres; and supporting metal silver and polypyrrole onto the surface of the hollow titanium dioxide by a chemical in-situ polymerization method to obtain the photocatalyst. The diameter of the prepared microspheres is adjustable, and the thickness of the titanium dioxide layer can be adjusted by changing the content of tetrabutyl titanate. The invention has favorable photocatalysis activity, and the optical response range can be extended to visible light area, thereby creating conditions for industrial photocatalytic degradation of pollutants with sunlight. The invention is simple to prepare, is environment-friendly, and is beneficial to circular economy and sustainable development.

Description

[0001] technical field [0002] The invention relates to a noble metal silver deposition-polypyrrole sensitized hollow titanium dioxide nanometer photocatalyst and a preparation method thereof, belonging to the field of preparation of new photocatalytic materials. Background technique [0003] Among oxide semiconductors, anatase-type nano-titanium dioxide has the strongest photocatalytic activity, and has the advantages of good chemical stability, wear resistance, low cost, and direct use of sunlight. It has been gradually used in wastewater Environmental fields such as treatment, water purification and air purification. However, due to its large forbidden band width, the photoresponse range only stays in the ultraviolet region, and this part of energy accounts for less than 4% of sunlight, which limits industrial applications. At present, the modification technology to improve the photocatalytic performance of titanium dioxide under visible light has become a research hots...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/08
Inventor 王冰李闯李琴崔皓庞建峰翟建平
Owner NANJING UNIV
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