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Noble metal palladium deposited-polypyrrole sensitized hollow type 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 problems that have not been seen yet, achieve low cost, reduce industrial application cost, and simple preparation

Inactive Publication Date: 2013-03-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Noble metal platinum deposition-polypyrrole sensitized hollow titania nanophotocatalysts have been reported

Method used

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  • Noble metal palladium deposited-polypyrrole sensitized hollow type titanium dioxide nanometer photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 2

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

[0026] 2) Hydrolyze butyl titanate into titania sol by sol-gel method, and load it onto the surface of carbon spheres prepared in step 1) by stirring to form C / TiO 2 Microspheres, wherein the mass ratio of butyl titanate and carbon spheres is 10:1;

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

[0028] 4) Infuse nitrogen gas into deionized water for half an hour to remove dissolved oxygen, then add chloroplatinic acid to oxidize pyrrole, use chemical in situ polymerization to generate polypyrrole and platinum, and load the reaction product to the prepared in step 3) by stirring On the surface of hollow titanium dioxide microspheres, chloroplatinic acid is measured by platinum in the synthesis system, wherein the mass ratio of platinum t...

Embodiment 3

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

[0032] 2) Hydrolyze butyl titanate into titania sol by sol-gel method, and load it onto the surface of carbon spheres prepared in step 1) by stirring to form C / TiO 2 Microspheres, wherein the mass ratio of butyl titanate and carbon spheres is 10:1;

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

[0034] 4) Infuse nitrogen gas into deionized water for half an hour to remove dissolved oxygen, then add chloroplatinic acid to oxidize pyrrole, use chemical in situ polymerization to generate polypyrrole and platinum, and load the reaction product to the prepared in step 3) by stirring On the surface of hollow titanium dioxide microspheres, chloroplatinic acid is measured by platinum in the synthesis system, wherein the mass ratio of platinum an...

Embodiment 4

[0037] 1) The 0.15 g / ml glucose solution was prepared into carbon spheres by hydrothermal synthesis at a hydrothermal temperature of 150 °C for 8 hours;

[0038] 2) Hydrolyze butyl titanate into titania sol by sol-gel method, and load it onto the surface of carbon spheres prepared in step 1) by stirring to form C / TiO 2 Microspheres, wherein the mass ratio of butyl titanate and carbon spheres is 10:1;

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

[0040] 4) Infuse nitrogen gas into deionized water for half an hour to remove dissolved oxygen, then add chloroplatinic acid to oxidize pyrrole, use chemical in situ polymerization to generate polypyrrole and platinum, and load the reaction product to the prepared in step 3) by stirring On the surface of hollow titanium dioxide microspheres, chloroplatinic acid is measured by platinum in the synthesis system, wherein the mass ratio of platin...

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Abstract

The invention discloses a noble metal palladium deposited-polypyrrole sensitized hollow type titanium dioxide nanometer photocatalyst and a preparation method thereof. The noble metal palladium deposited-polypyrrole sensitized hollow type titanium dioxide nanometer photocatalyst adopts hollow titania microspheres as a carrier for carrying polypyrrole and platinum. The preparation method comprises the following steps in sequence: carrying out glucose-based hydro-thermal synthesis to obtain carbon nanospheres; loading a titanium dioxide film coating onto the surface of the carbon nanospheres through a sol-gel method so as to obtain C / TiO2 microspheres, wherein the carbon nanospheres serve as the template agent; roasting the microspheres to prepare into hollow titanium dioxide nanospheres; loading platinum and polypyrrole on the surface of the hollow titanium dioxide through an in-situ chemical polymerizing method; and transferring to the ultraviolet rays to irradiate, thus obtaining the hollow type titanium dioxide nanometer photocatalyst. The grain size of the hollow type titanium dioxide nanometer photocatalyst can be adjusted, and the thickness of the titanium dioxide coating can be controlled. The noble metal palladium deposited-polypyrrole sensitized hollow type titanium dioxide nanometer photocatalyst is higher in photocatalytic activity; and as shown in UV-vis results, the photo response area is expanded to the visible region, so that the condition is provided for industrially degrading the pollutant through photochemical catalysis under the sunshine.

Description

[0001] technical field [0002] The invention relates to a noble metal platinum deposition-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] Nano-TiO 2 Based photocatalyst is a cheap, non-toxic, energy-saving and efficient material for photocatalytic degradation of organic pollutants in air and water. At present, researchers have prepared TiO with different sizes and special structures. 2 , where the hollow TiO 2 Microspheres have attracted the most attention. TiO with this structure 2 With a large specific surface area, it can not only absorb a large amount of degradation products, but also the large number of mesopores on the surface of the shell is conducive to the inward diffusion of reactants; the highly active photogenerated electrons and holes generated by light excitation are easier to separate and migrate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38
Inventor 李琴李闯王冰崔皓翟建平
Owner NANJING UNIV
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