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Iron-nitrogen-doped titanium dioxide-loaded carbon fiber composite photocatalyst and preparation method thereof

A technology of titanium dioxide and carbon fiber, which is applied in the field of photocatalysis, can solve the problems of difficult recycling of powdered materials, wide band gap, and low photon quantum efficiency, and achieve the effect of low cost, easy realization of conditions, and improvement of quantum efficiency

Inactive Publication Date: 2016-05-25
BINZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But TiO 2 There are problems such as photogenerated electrons-holes are easy to recombine, low photon quantum efficiency, wide bandgap (Eg>3.2eV), cannot be excited by visible light, and powdery materials are not easy to recycle, which limits TiO 2 Wide application of photocatalytic materials

Method used

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  • Iron-nitrogen-doped titanium dioxide-loaded carbon fiber composite photocatalyst and preparation method thereof
  • Iron-nitrogen-doped titanium dioxide-loaded carbon fiber composite photocatalyst and preparation method thereof
  • Iron-nitrogen-doped titanium dioxide-loaded carbon fiber composite photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 19mL of butyl titanate to 30mL of absolute ethanol, stir for 1h, and mix well to prepare solution A; add 0.02g of Fe(NO 3 ) 3 ?9H 2 O and 0.25g of urea were added to 2mL of acetic acid to prepare solution B; slowly add solution B to solution A under stirring conditions, and continue stirring for 1 hour to obtain solution C; 5.0mL of acetic acid and 6.2mL of absolute ethanol were added Add solution D to 3-4mL deionized water; slowly add solution D to solution C under stirring conditions, and continue stirring for 2.5 hours to obtain iron and nitrogen titanium dioxide precursor gel;

[0033] In order to improve the TiO 2 The load rate and load fastness on the carbon fiber surface, the carbon fiber surface is pretreated as follows:

[0034] Cut the carbon fibers into 5.0cm / bundle (0.1g / bundle), put 20 bundles into a round bottom flask, reflux with acetone at 60°C for 45min, wash with deionized water, and dry in the air. Then add 200mL of nitric acid with a concentr...

Embodiment 2

[0037] Add 19mL of butyl titanate to 30mL of absolute ethanol, stir for 1h, and mix well to prepare solution A; add 0.025g of Fe(NO 3 ) 3 ?9H 2 O and 0.1026g of urea were added to 2mL of acetic acid to prepare solution B; slowly add solution B to solution A under stirring conditions, and continue stirring for 1 hour to obtain solution C; 5.0mL of acetic acid and 6.2mL of absolute ethanol were added Add solution D to 3-4mL deionized water; slowly add solution D to solution C under stirring conditions, and continue stirring for 2.5 hours to obtain iron and nitrogen titanium dioxide precursor gel;

[0038] In order to improve the TiO 2 The load rate and load fastness on the carbon fiber surface, the carbon fiber surface is pretreated as follows:

[0039] Cut the carbon fibers into 5.0cm / bundle (0.1g / bundle), put 20 bundles into a round bottom flask, reflux with acetone at 60°C for 45min, wash with deionized water, and dry in the air. Then add 200mL of nitric acid with a conce...

Embodiment 3

[0042] Add 19mL of butyl titanate to 30mL of absolute ethanol, stir for 1h, and mix well to prepare solution A; add 0.03g of Fe(NO 3 ) 3 ?9H 2O and 0.1539g of urea were added to 2mL of acetic acid to prepare solution B; slowly add solution B to solution A under stirring conditions, and continue stirring for 1 hour to obtain solution C; 5.0mL of acetic acid and 6.2mL of absolute ethanol were added Add solution D to 3-4mL deionized water; slowly add solution D to solution C under stirring conditions, and continue stirring for 2.5 hours to obtain iron and nitrogen titanium dioxide precursor gel;

[0043] In order to improve the TiO 2 The load rate and load fastness on the carbon fiber surface, the carbon fiber surface is pretreated as follows:

[0044] Cut the carbon fibers into 5.0cm / bundle (0.1g / bundle), put 20 bundles into a round bottom flask, reflux with acetone at 60°C for 45min, wash with deionized water, and dry in the air. Then add 200mL of nitric acid with a concent...

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Abstract

The invention discloses an iron-nitrogen-doped titanium dioxide-loaded carbon fiber composite photocatalyst and a preparation method thereof, and belongs to the technical field of photocatalysts. The iron-nitrogen-codoped titanium dioxide-loaded carbon fiber composite photocatalyst ((Fe,N) / TiO2@CF for short) is prepared through sol and gel and an impregnating method; by introducing iron atoms and nitrogen atoms into the photocatalyst, the impurity energy level is introduced between a conduction band and a valence band of TiO2, the band-gap energy of the photocatalyst is reduced, and the visible photocatalytic performance of the photocatalyst is improved; loaded carbon fibers (CF for short) are utilized, therefore, the material is easy to recycle, the reuse performance of the photocatalyst is improved, effective migration of photo-induced electrons is improved, the recombination probability of electron holes is decreased, and the photo quantum efficiency of a catalytic material is improved.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to an iron and nitrogen-doped titanium dioxide-supported carbon fiber composite photocatalyst and a preparation method thereof. Background technique [0002] Semiconductor photocatalysis technology uses light-sensitized semiconductor materials as catalysts. Under the irradiation of light sources, the energy of photons is absorbed to generate free electrons or holes, which are further reflected in specific environments to generate free radicals with oxidation properties. These free radicals oxidize target pollutants. Degraded into non-toxic and harmless substances. [0003] Due to their unique electronic and energy band structures, semiconductor photocatalytic materials have attracted extensive attention for the treatment of refractory organic pollutants. where TiO 2 Photocatalytic materials have become one of the research hotspots in the field of photocatalytic materials in...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J21/18B01J27/24B01J35/39
Inventor 商希礼李长海刘美玲段永正杜平郑晶静
Owner BINZHOU UNIV
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