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Recoverable float type Pt-TiO2/ floating bead photocatalyst and preparation method thereof

A pt-tio2, floating type technology, applied in the field of photocatalytic materials, can solve the problems of waste of resources and difficulty in recycling, and achieve the effects of reducing industrial application costs, simple preparation and easy recycling

Inactive Publication Date: 2013-09-04
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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  • Recoverable float type Pt-TiO2/ floating bead photocatalyst and preparation method thereof
  • Recoverable float type Pt-TiO2/ floating bead photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0031] 1) Pretreatment of floating beads: soak the floating beads extracted from fly ash with 10% dilute nitric acid for 4 hours, and then rinse with distilled water until the outflowing water is neutral, and then use after drying;

[0032] 2) Using butyl titanate, absolute ethanol, acetylacetone and distilled water as raw materials, the molar ratio of butyl titanate, absolute ethanol, acetylacetone and distilled water is 1:25:1:3, and the pH is adjusted with concentrated nitric acid To 5, stir to make it fully react, then add polyethylene glycol 20000 to make the molar ratio of butyl titanate and polyethylene glycol to be 800:1, heat and stir to fully dissolve, that is, to obtain yellow and transparent TiO 2 sol;

[0033] 3) To TiO 2 Add the floating bead carrier pretreated in step 1) to the sol, so that the mass ratio of butyl titanate to the floating beads is 7:1, stir to mix evenly, soak for 12 hours, filter, store the filtrate at a constant temperature, and filter out th...

Embodiment 3

[0038] 1) Pretreatment of floating beads: soak the floating beads extracted from fly ash with 10% dilute nitric acid for 4 hours, and then rinse with distilled water until the outflowing water is neutral, and then use after drying;

[0039] 2) Using butyl titanate, absolute ethanol, acetylacetone and distilled water as raw materials, the molar ratio of butyl titanate, absolute ethanol, acetylacetone and distilled water is 1:25:1:2, and the pH is adjusted with concentrated nitric acid To 6, stir to make it fully react, then add polyethylene glycol 20000 to make the molar ratio of butyl titanate to polyethylene glycol 1000:1, heat and stir to fully dissolve, that is, to obtain yellow and transparent TiO 2 sol;

[0040] 3) To TiO 2 Add the floating bead carrier pretreated in step 1) to the sol, so that the mass ratio of butyl titanate to the floating beads is 10:1, stir to mix evenly, soak for 24 hours, filter, store the filtrate at a constant temperature, and filter out the sampl...

Embodiment 4

[0045] 1) Pretreatment of floating beads: soak the floating beads extracted from fly ash with 10% dilute nitric acid for 4 hours, and then rinse with distilled water until the outflowing water is neutral, and then use after drying;

[0046] 2) Using butyl titanate, absolute ethanol, acetylacetone and distilled water as raw materials, the molar ratio of butyl titanate, absolute ethanol, acetylacetone and distilled water is 1:25:1:1, and the pH is adjusted with concentrated nitric acid To 5, stir to make it fully react, then add polyethylene glycol 20000 to make the molar ratio of butyl titanate to polyethylene glycol 1200:1, heat and stir to fully dissolve, that is, to obtain yellow and transparent TiO 2 sol;

[0047] 3) To TiO 2 Add the floating bead carrier pretreated in step 1) to the sol, so that the mass ratio of butyl titanate to the floating beads is 10:1, stir to mix evenly, soak for 36 hours, filter, store the filtrate at a constant temperature, and filter out the sam...

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Abstract

The invention discloses a recoverable float type Pt-TiO2 / floating bead photocatalyst and a preparation method thereof. The carrier of the catalyst is regular cenosphere, and TiO2 with the deposition of Pt is loaded on in a film layer form. The preparation comprises the steps that at a room temperature, defined amount of distilled water is added into a butyl titanate and absolute ethyl alcohol mixed solution, and the mixture is stirred to form a TiO2 sol; the floating beads are taken as the carrier, a titanium dioxide film layer is loaded on the surface through a sol-gel method, and TiO2 / floating bead is prepared after drying and calcination; and TiO2 / floating bead is mixed with a chloroplatinic acid solution, and platinum is loaded to the surface of TiO2 / floating bead through a photodeposition method to obtain the photocatalyst. According to the recoverable float type Pt-TiO2 / floating bead photocatalyst and the preparation method thereof, the particle size of the carrier is adjustable, the thickness of the titanium dioxide layer is controllable, good photocatalytic activity is provided, UV-vis results prove that the photoresponse range is expanded to a visible region, so that conditions are created for photocatalytic degradation of pollutants by using sunlight in industry.

Description

[0001] technical field [0002] The invention relates to the field of photocatalytic materials, in particular to a recyclable floating Pt-TiO 2 / bleached pearlescent catalyst and preparation method thereof. Background technique [0003] Among oxide semiconductors, anatase TiO 2 Its photocatalytic activity is the strongest, and it is a cheap, non-toxic, energy-saving and efficient material for photocatalytic degradation of organic pollutants in air and water. But due to TiO 2 The wide bandgap can only be excited by ultraviolet light, and the solar spectrum only contains about 4% of ultraviolet light, which greatly limits its practical application in environmental purification, thus improving the TiO 2 The modification technology of photocatalytic properties under visible light has become a research hotspot. Platinum modification affects TiO by changing the electron distribution in the system 2 Surface properties, thereby improving the efficiency of photocatalytic reacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J35/00
Inventor 李琴李闯王冰崔皓张进李保菊翟建平
Owner NANJING UNIV
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