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An α-Fe enriched in cation-deficient clusters 2 o 3 Photocatalyst and its preparation method and application

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: 2022-02-01
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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  • An α-Fe enriched in cation-deficient clusters <sub>2</sub> o <sub>3</sub> Photocatalyst and its preparation method and application
  • An α-Fe enriched in cation-deficient clusters <sub>2</sub> o <sub>3</sub> Photocatalyst and its preparation method and application
  • An α-Fe enriched in cation-deficient clusters <sub>2</sub> o <sub>3</sub> Photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] α-Fe enriched in cation-deficient clusters 2 o 3 The preparation of photocatalyst comprises the following steps:

[0040] (1) α-Fe rich in cation-deficient clusters 2 o 3 Preparation of nanoparticles

[0041] 1.6g of Fe 2 (SO 4 ) 3 ·7H 2 O was placed in 20ml of deionized water, stirred for 20min; 0.96g of NaOH was placed in 20ml of deionized water, stirred for 20min; the above two solutions were mixed, stirred for 10min to make it fully mixed, and then 1.4g of NaOH was added to the mixed solution Sodium dodecylbenzenesulfonate and 0.16g 2,2'-bipyridine, continue to stir for 20min; transfer the fully mixed solution to a high-temperature reaction kettle, place the reaction kettle in a blast oven, at 180°C Heating for 12 hours, taking out the reactor, and cooling down naturally.

[0042] The product was centrifuged and washed three times at a speed of 6000 rpm with deionized water and absolute ethanol respectively, and the washed product was dried at 60°C;

[004...

Embodiment 2

[0047] α-Fe enriched in cation-deficient clusters 2 o 3 The preparation of photocatalyst comprises the following steps:

[0048] (1) α-Fe rich in cation-deficient clusters 2 o 3 Preparation of nanoparticles

[0049] 0.8g of Fe 2 (SO 4 ) 3 ·7H 2 O was placed in 10ml of deionized water, stirred for 15min; 0.48g of NaOH was placed in 10ml of deionized water, stirred for 15min; the above two solutions were mixed, stirred for 10min to fully mix, and then 0.7g of Sodium dodecylbenzenesulfonate and 0.08g 2,2'-bipyridine, continue to stir for 10min; transfer the fully mixed solution to a high-temperature reaction kettle, place the reaction kettle in a blast oven, Heating for 15h, taking out the reactor, and cooling down naturally.

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

[0051] (2) α-Fe rich in cation-deficient clusters 2 o 3 Preparation...

Embodiment 3

[0054] α-Fe enriched in cation-deficient clusters 2 o 3 The preparation of photocatalyst comprises the following steps:

[0055] (1) α-Fe rich in cation-deficient clusters 2 o 3 Preparation of nanoparticles

[0056] 1.2g of Fe 2 (SO 4 ) 3 ·7H 2 O was placed in 15ml of deionized water and stirred for 15min; 0.64g of NaOH was placed in 10ml of deionized water and stirred for 15min; Sodium dodecylbenzenesulfonate and 0.12g 2,2'-bipyridine, continue to stir for 20min; transfer the fully mixed solution to a high-temperature reaction kettle, place the reaction kettle in a blast oven, at 150°C Heating for 15h, taking out the reactor, and cooling down naturally.

[0057] The product was centrifuged and washed three times at a speed of 6000 rpm with deionized water and absolute ethanol respectively, and the washed product was dried at 60°C;

[0058] (2) α-Fe rich in cation-deficient clusters 2 o 3 Preparation of Nanoparticle Photocatalysts

[0059] The above-mentioned α-Fe...

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Abstract

The invention discloses an α-Fe rich in cationic defect clusters 2 O 3 A photocatalyst relates to the technical field of semiconductor photocatalysis. α-Fe rich in cationic defect clusters 2 O 3 The nanoparticle is in the shape of a spindle-shaped nanorod with a size distribution of 80-500 nm. The invention also discloses a preparation method and application of the above-mentioned photocatalyst. The beneficial effect of the present invention is that it can solve the problem of TiO 2 The catalyst is difficult to utilize the deficiency of visible light, and has organic degradation activity under visible light irradiation, which is better than defect-free α-Fe 2 O 3 Nanoparticles enriched with oxygen atomic vacancy defect α-Fe 2 O 3 Nanoparticles and α-Fe rich in iron atomic vacancy defects 2 O 3 The photocatalytic activities of the nanoparticles are 82%, 47% and 70% higher, respectively, and they have 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 cation defect clusters 2 o 3 Photocatalyst and its preparation method and application. Background technique [0002] With the advancement of global industrialization, severe water environment problems are facing people. When faced with the problem of how to degrade water environmental pollutants, photocatalytic technology has attracted widespread 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 has been highly valued due to its cheap availability, environmental friendliness, good photocorrosion resistance and catalytic activity. But TiO 2 It still has its own disadvantages. 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 diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745C02F1/30C02F101/34
CPCB01J23/745B01J35/004B01J35/0013C02F1/30C02F2101/345C02F2305/10
Inventor 郭盛祺沈伯雄王栎焱
Owner HEBEI UNIV OF TECH
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