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Floating polypyrrole-TiO2/floating bead photocatalyst, and preparation method and application thereof

A catalyst, polypyrrole technology, used in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problems of difficulty in recycling, waste of resources, etc. , easy to recycle, improve the effect of photocatalytic effect

Inactive Publication Date: 2012-01-04
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TiO involved in the wastewater treatment process 2 Most of them are nano-scale particles, which are difficult to recycle and easily cause waste of resources

Method used

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  • Floating polypyrrole-TiO2/floating bead photocatalyst, and preparation method and application thereof
  • Floating polypyrrole-TiO2/floating bead photocatalyst, and preparation method and application thereof
  • Floating polypyrrole-TiO2/floating bead photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Pretreatment of floating beads: Soak the floating beads extracted from fly ash with dilute nitric acid for 8 hours, then rinse with distilled water until the outflowing water is neutral, and dry them for later use;

[0024] 2) Using butyl titanate, absolute ethanol, acetylacetone, and ultrapure water as raw materials, the molar ratio of butyl titanate, absolute ethanol, acetylacetone, and ultrapure water is 1:26:1:1. Adjust the pH to 5 with concentrated nitric acid, stir to make it fully react, then add polyethylene glycol so that the molar ratio of butyl titanate to polyethylene glycol is 1000:1, heat and stir to fully dissolve it, and then obtain yellow Transparent TiO 2 Sol;

[0025] 3) To TiO 2 Add the pretreated floating bead carrier in step 1) to the sol, so that the mass ratio of butyl titanate to floating beads is 7:1, stir to mix evenly, and after immersing for 24 h, filter off the excess sol, and filter out The sample was dried, then placed in a muffle f...

Embodiment 2

[0038] 1) Fly ash floating bead pretreatment: Soak in 10% by weight dilute nitric acid for 8 hours, rinse with a large amount of distilled water until the outflowing water is neutral, and dry it for later use.

[0039] 2) Using butyl titanate, absolute ethanol, acetylacetone, and ultrapure water as raw materials, the molar ratio of butyl titanate, absolute ethanol, acetylacetone, and ultrapure water is 1:26:1:1. Adjust the pH to 5 with concentrated nitric acid, stir to make it fully react, then add polyethylene glycol so that the molar ratio of butyl titanate to polyethylene glycol is 1000:1, heat and stir to fully dissolve it, and then obtain yellow Transparent TiO 2 Sol;

[0040] 3) To TiO 2 Add the pretreated floating bead carrier in step 1) to the sol, so that the mass ratio of butyl titanate to floating beads is 7:1, stir to mix evenly, and after immersing for 24 h, filter off the excess sol, and filter out The sample was dried, then placed in a muffle furnace for calc...

Embodiment 3

[0049] 1) Fly ash floating bead pretreatment: Soak in 10% by weight dilute nitric acid for 8 hours, rinse with a large amount of distilled water until the outflowing water is neutral, and dry it for later use.

[0050] 2) Using butyl titanate, absolute ethanol, acetylacetone, and ultrapure water as raw materials, the molar ratio of butyl titanate, absolute ethanol, acetylacetone, and ultrapure water is 1:26:1:1. Adjust the pH to 5 with concentrated nitric acid, stir to make it fully react, then add polyethylene glycol so that the molar ratio of butyl titanate to polyethylene glycol is 1000:1, heat and stir to fully dissolve it, and then obtain yellow Transparent TiO 2 Sol;

[0051] 3) To TiO 2 Add the pretreated floating bead carrier in step 1) to the sol, so that the mass ratio of butyl titanate to floating beads is 7:1, stir to mix evenly, and after immersing for 24 h, filter off the excess sol, and filter out The sample was dried, then placed in a muffle furnace for calc...

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Abstract

The invention discloses a floating polypyrrole-TiO2 / floating bead photocatalyst with a light responding range capable of being extended to a visible light area, and a preparation method and application of the floating polypyrrole-TiO2 / floating bead photocatalyst. The preparation method comprises the steps of: adding distilled water in a mixed solution of butyl titanate and absolute ethyl alcohol and stirring to form TiO5 collosol; mixing and stirring fly ash floating beads and the collosol for loading; introducing polymethyl diallyl ammonium chloride and sodium polystytrene sulfonate to preprocess the mixture of the fly ash floating beads and the collosol; and loading a moderate polypyrrole on TiO2 / floating beads by adopting an in-situ polymerization process to obtain the composite polypyrrole-TiO2 / floating beads photocatalyst. Tests prove that the light responding range of the photocatalyst is extended to the visible light area, which has great significance in improving the using rate of the sun lights; and in comparison with the TiO2 / floating beads, the polypyrrole-TiO2 / floating beads can improve the degrading efficiency of methylene blue in visible lights.

Description

[0001] technical field [0002] The present invention relates to a kind of photocatalyst, especially a kind of floating polypyrrole-TiO 2 / The preparation method of the bleached pearlescent catalyst, the present invention also relates to the photoresponse performance of the photocatalyst in the visible light wavelength range and the degradation performance to methylene blue under visible light irradiation. Background technique [0003] Among oxide semiconductors, anatase nano-TiO 2 Photocatalytic activity is the strongest, and it has the advantages of good chemical stability, wear resistance, low cost, and direct use of sunlight. It has been gradually used in environmental fields such as wastewater 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. Modified TiO 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/30C02F101/38
Inventor 李琴王冰庞建峰李闯翟建平
Owner NANJING UNIV
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