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Supported N-TiO2 photocatalyst, and preparation method and application of supported N-TiO2 photocatalyst

A photocatalyst, supported technology, applied in chemical instruments and methods, other chemical processes, adsorbed water/sewage treatment, etc., to facilitate recycling, improve photocatalytic activity, and improve electrical conductivity.

Inactive Publication Date: 2018-01-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since TiO 2 The forbidden band width is 3.2ev, and it can only be excited by ultraviolet light with a wavelength less than 380nm; and only about 4% of ultraviolet light in sunlight

Method used

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  • Supported N-TiO2 photocatalyst, and preparation method and application of supported N-TiO2 photocatalyst
  • Supported N-TiO2 photocatalyst, and preparation method and application of supported N-TiO2 photocatalyst

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Effect test

Embodiment 1

[0023] Loaded N-TiO of the present invention 2 The preparation method of photocatalyst comprises the steps:

[0024] Step 1, preparation of N-TiO 2 Composite sol: Slowly drop 5mL of butyl titanate into 10mL of absolute ethanol, then add 3mL of glacial acetic acid to the absolute ethanol, adjust the pH of the mixed solution to 2 with nitric acid, mix and stir for 30min to obtain the mixed solution A; Slowly drop 10 mL of absolute ethanol into the mixed solution A, stir for 15 minutes to obtain the mixed solution B; add 0.5 mL of ammonium chloride with a concentration of 1 M to the mixed solution B, stir rapidly for 30 minutes and then let it stand for 20 minutes to obtain N- TiO 2 Composite sol;

[0025] Step 2, immerse the pretreated catalyst carrier conductive glass plate in the N-TiO prepared in step 1 2 In the composite sol, N-TiO will be loaded after soaking for 60min 2 The conductive glass plate of the photocatalytic material is slowly taken out, and the conductive g...

Embodiment 2

[0028] Loaded N-TiO of the present invention 2 The preparation method of photocatalyst comprises the steps:

[0029] Step 1, preparation of N-TiO 2 Composite sol: Slowly drop 5mL of butyl titanate into 10mL of absolute ethanol, then add 3mL of glacial acetic acid to the absolute ethanol, adjust the pH value of the mixed solution to 1.5 with nitric acid, mix and stir for 30min to obtain the mixed solution A; Slowly drop 10mL of absolute ethanol into the mixed solution A, stir for 15min to obtain the mixed solution B; add 1mL of ammonium chloride with a concentration of 1M to the mixed solution B, stir rapidly for 30min and then let it stand for 20min to obtain N-TiO 2 Composite sol;

[0030] Step 2, immerse the pretreated catalyst carrier conductive glass plate in the N-TiO prepared in step 1 2 In the composite sol, N-TiO will be loaded after soaking for 60min 2 The conductive glass plate of the photocatalytic material is slowly taken out, and the conductive glass plate is ...

Embodiment 3

[0032] Loaded N-TiO of the present invention 2 The preparation method of photocatalyst comprises the steps:

[0033] Step 1, preparation of N-TiO 2 Composite sol: Slowly drop 5mL of butyl titanate into 10mL of absolute ethanol, then add 3mL of glacial acetic acid to the absolute ethanol, adjust the pH value of the mixed solution to 2.5 with nitric acid, mix and stir for 30min to obtain the mixed solution A; Slowly drop 10 mL of absolute ethanol into the mixed solution A, stir for 15 minutes to obtain the mixed solution B; add 1.5 mL of ammonium chloride with a concentration of 1 M to the mixed solution B, stir rapidly for 30 minutes and then let it stand for 20 minutes to obtain N- TiO 2 Composite sol;

[0034] Step 2, immerse the pretreated catalyst carrier conductive glass plate in the N-TiO prepared in step 1 2 In the composite sol, N-TiO will be loaded after soaking for 60min 2The conductive glass plate of the photocatalytic material is slowly taken out, and the condu...

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Abstract

The invention discloses a supported N-TiO2 photocatalyst and further discloses a preparation method and application of the supported N-TiO2 photocatalyst. The supported N-TiO2 photocatalyst is prepared by a sol gel method. The method comprises the steps of preparing an N doped TiO2 photocatalysis material, immersing a catalyst carrier in N-TiO2 compound collosol, and performing drying and high temperature calcination to form the supported N-TiO2 photocatalyst. The supported N-TiO2 photocatalyst enlarges a photoresponse scope of TiO2; the adsorptive capacity and conductivity are improved; the photocatalytic activity of the supported N-TiO2 photocatalyst is greatly improved; the supported N-TiO2 photocatalyst can adsorb and degrade organic pollutant dye molecules under visible light; in addition, compared with a powder photocatalyst, the supported N-TiO2 photocatalyst is convenient to recycle; and the secondary pollution of the photocatalyst to a water body can be effectively reduced.

Description

technical field [0001] The invention relates to a titanium dioxide photocatalyst, in particular to a supported N-TiO 2 Photocatalyst, also related to the above-mentioned supported N-TiO 2 The preparation method and application of photocatalyst belong to the technical field of photocatalyst. Background technique [0002] Dye wastewater has become a kind of industrial wastewater that is difficult to treat due to its high concentration, poor biodegradability, and large chroma. With the rapid development of the printing and dyeing industry, there has been an increase in the amount of discharge and an increase in the variety of dyes, resulting in water pollution. The quality dropped drastically. In addition, if the dye substances are discharged into the environment without timely treatment, a series of chemical reactions will occur to generate toxic by-products, which will further deteriorate the ecological environment. Compared with the traditional physical chemical method an...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J20/06B01J20/30C02F1/30C02F1/28C02F101/38C02F101/30
Inventor 杨汉培毛静涛朱鸿宇高照郭润强尤晓慧
Owner HOHAI UNIV
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