Polypyrrole-sensitized hollow titanium dioxide nanometer 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: 2012-07-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 have been no reports involving polypyrrole-sensitized hollow titanium dioxide nano-photocatalysts.

Method used

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  • Polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst and preparation method thereof
  • Polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0025] 1) Prepare carbon spheres by hydrothermal synthesis of 0.15 g / ml glucose solution at a hydrothermal temperature of 180 °C for 8 h;

[0026] 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, Preparation of C / titania microspheres;

[0027] 3) Calcining the C / titanium dioxide microspheres prepared in step 2) at 350 °C for 2 h to obtain hollow titanium dioxide microspheres;

[0028] 4) Pyrrole was oxidized into polypyrrole by chemical in-situ polymerization in a solution with a hydrochloric acid concentration of 1 mol / l, and it was loaded onto the surface of hollow titanium dioxide microspheres prepared in step 3) by stirring. In the synthesis system, pyrrole and hollow The molar ratio of titanium dioxide microspheres is 1:100, and finally a polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst is ...

Embodiment 3

[0031] 1) Prepare carbon spheres by hydrothermal synthesis of 0.5 g / ml glucose solution at a hydrothermal temperature of 180 °C for 8 h;

[0032] 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;

[0033] 3) Calcining the C / titanium dioxide microspheres prepared in step 2) at 450°C for 2 h to obtain hollow titanium dioxide microspheres;

[0034] 4) Pyrrole was oxidized into polypyrrole by chemical in-situ polymerization in a solution with a hydrochloric acid concentration of 1.5 mol / l, and it was loaded onto the surface of hollow titanium dioxide microspheres prepared in step 3) by stirring. In the synthesis system, pyrrole and hollow The molar ratio of titanium dioxide microspheres is 1:100, and finally a polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst ...

Embodiment 4

[0037] 1) Prepare carbon spheres by hydrothermal synthesis of 0.15 g / ml glucose solution at a hydrothermal temperature of 150 °C for 8 h;

[0038] 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;

[0039] 3) Calcining the C / titanium dioxide microspheres prepared in step 2) at 450 °C for 2 h to obtain hollow titanium dioxide microspheres;

[0040] 4) Pyrrole was oxidized into polypyrrole by chemical in-situ polymerization in a solution with a hydrochloric acid concentration of 0.5 mol / l, and it was loaded onto the surface of hollow titanium dioxide microspheres prepared in step 3) by stirring. In the synthesis system, pyrrole and hollow The molar ratio of titanium dioxide microspheres is 1:100, and finally a polypyrrole-sensitized hollow titanium dioxide nanometer photocatalys...

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Abstract

The invention discloses a polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst and a preparation method thereof. The preparation method comprises the following steps of: carrying out hydro-thermal synthesis to obtain nanometer carbon pellets by utilizing glucose; with the carbon pellets as a template agent, loading a titanium dioxide film layer on the surface through a sol-gel method to prepare carbon/titanium dioxide microspheres; sintering the microspheres to prepare hollow titanium dioxide nanometer microspheres; and loading a suitable amount of polypyrrole on the surface of the hollow titanium dioxide by utilizing a chemical in-situ polymerization method to obtain the polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst. The microspheres prepared by the method disclosed by the invention have adjustable diameters, and the thickness of the titanium dioxide layer can be also adjusted by changing the content of butyl titanate. The polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst disclosed by the invention has better photocatalytic activity, and especially, the response range of lights can be expanded to a visible light area, thus conditions are created for the application of the polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst to carry out photocatalytic degradation on pollutants by utilizing solar lights in the industry. The polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst and the preparation method thereof, disclosed by the invention, have the advantages of simplicity in preparation, environment friendliness, economy and suitability, and are favorable for circular economy and sustainable development.

Description

[0001] technical field [0002] The invention relates to a polypyrrole-sensitized hollow titanium dioxide nanometer photocatalyst and a preparation method thereof, belonging to the field of preparation of novel 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. Modifying titanium dioxide to overcome the above shortcomings has become the main direction of research for researchers. At present, common modification methods include: dopin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38
Inventor 王冰李闯崔皓李琴庞建峰翟建平
Owner NANJING UNIV
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