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Alpha-Fe2O3 photocatalyst rich in cationic defect cluster and preparation method and application thereof

A photocatalyst, cation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Photocatalytic degradation activity, the effect of superior organic degradation activity

Active Publication Date: 2019-08-30
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are a small number of literatures on cation defects, these reports all focus on the analysis and investigation of single-atom vacancy defects in metals, and the investigation of cation defect clusters has not yet been seen.

Method used

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  • Alpha-Fe2O3 photocatalyst rich in cationic defect cluster and preparation method and application thereof
  • Alpha-Fe2O3 photocatalyst rich in cationic defect cluster and preparation method and application thereof
  • Alpha-Fe2O3 photocatalyst rich in cationic defect cluster and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Α-Fe rich in cationic defect clusters 2 O 3 The preparation of the photocatalyst includes the following steps:

[0040] (1) α-Fe rich in cationic defect clusters 2 O 3 Nanoparticle preparation

[0041] 1.6g of Fe 2 (SO 4 ) 3 ·7H 2 O was placed in 20ml of deionized water and stirred for 20min; 0.96g of NaOH was placed in 20ml of deionized water and stirred for 20min; the above two solutions were mixed, stirred for 10min to mix them thoroughly, and then 1.4g of NaOH was added to the mixed solution Sodium dodecylbenzene sulfonate and 0.16g 2,2'-bipyridine, continue to stir for 20min; transfer the fully mixed solution to a high-temperature reactor, place the reactor in a blast oven and heat it at 180℃ 12h, take out the reaction kettle and let it cool down naturally.

[0042] Use deionized water and absolute ethanol to wash the product three times by centrifugation at 6000 rpm, and dry the washed product at 60°C;

[0043] (2) α-Fe rich in cationic defect clusters 2 O 3 Preparation ...

Embodiment 2

[0047] Α-Fe rich in cationic defect clusters 2 O 3 The preparation of the photocatalyst includes the following steps:

[0048] (1) α-Fe rich in cationic defect clusters 2 O 3 Nanoparticle preparation

[0049] 0.8g of Fe 2 (SO 4 ) 3 ·7H 2 O was placed in 10ml deionized water and stirred for 15min; 0.48g of NaOH was placed in 10ml of deionized water and stirred for 15min; the above two solutions were mixed, stirred for 10min to mix them thoroughly, and then 0.7g of NaOH was added to the mixed solution Sodium dodecylbenzene sulfonate and 0.08g 2,2'-bipyridine, continue to stir for 10 minutes; transfer the fully mixed solution to a high temperature reactor, place the reactor in a blast oven, and heat at 150°C 15h, take out the reaction kettle and let it cool down naturally.

[0050] The product was centrifuged and washed 5 times with deionized water and absolute ethanol at 6000 rpm, and the washed product was dried at 60°C;

[0051] (2) α-Fe rich in cationic defect clusters 2 O 3 Prepara...

Embodiment 3

[0054] Α-Fe rich in cationic defect clusters 2 O 3 The preparation of the photocatalyst includes the following steps:

[0055] (1) α-Fe rich in cationic defect clusters 2 O 3 Nanoparticle preparation

[0056] 1.2g of Fe 2 (SO 4 ) 3 ·7H 2 O was placed in 15ml deionized water and stirred for 15min; 0.64g of NaOH was placed in 10ml of deionized water and stirred for 15min; the above two solutions were mixed, stirred for 10min to mix them thoroughly, and then 0.9g of NaOH was added to the mixed solution Sodium dodecylbenzene sulfonate and 0.12g 2,2'-bipyridine, continue to stir for 20min; transfer the fully mixed solution to a high temperature reactor, place the reactor in a blast oven, and heat at 150℃ 15h, take out the reaction kettle and let it cool down naturally.

[0057] Use deionized water and absolute ethanol to wash the product three times by centrifugation at 6000 rpm, and dry the washed product at 60°C;

[0058] (2) α-Fe rich in cationic defect clusters 2 O 3 Preparation of Na...

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Abstract

The invention discloses an alpha-Fe2O3 photocatalyst rich in cationic defect cluster, and relates to the technical field of semiconductor photocatalysis. The alpha-Fe2O3 nanoparticles rich in cationicdefect cluster are in spindle type nanorod shapes having a size distribution of 80 to 500 nm. The invention also discloses a preparation method and application of the photocatalyst. The invention hasthe beneficial effects of being able to solve the problem that a TiO2 catalyst is difficult in utilizing visible light and has organic matter degradation activity under visible light irradiation, is82%, 47% and 70% higher than alpha-Fe2O3 nanoparticles having no defect, alpha-Fe2O3 nanoparticles rich in iron atom vacancy defect and alpha-Fe2O3 nanoparticles rich in iron atom vacancy defects in the photocatalytic activity respectively, has good cycle stability and can be reused many times.

Description

Technical field [0001] The invention relates to the technical field of semiconductor photocatalysis, in particular to an α-Fe rich in cationic defect clusters 2 O 3 Photocatalyst and its preparation method and application. Background technique [0002] With the advancement of global industrialization, severe water environment issues are facing people. When faced with the problem of how to degrade pollutants in the water environment, photocatalytic technology has attracted wide attention due to its obvious advantages such as low cost, fast degradation speed, and high degradation degree. Among the many photocatalyst materials studied, TiO 2 It is highly valued because of its low cost and easy availability, environmental friendliness, and good photocorrosion resistance and catalytic activity. But TiO 2 There are still its own drawbacks. The most important of these is TiO 2 As a photocatalyst, it is often necessary to use ultraviolet light as an excitation light source, so it is di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/30C02F101/34
CPCB01J23/745C02F1/30C02F2101/345C02F2305/10B01J35/23B01J35/39
Inventor 郭盛祺沈伯雄王栎焱
Owner HEBEI UNIV OF TECH
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