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FeOOH/Cu2O composite microsphere photocatalyst and preparation method thereof

A photocatalyst and composite microsphere technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The effect of enriching, inhibiting recombination, and improving photocatalytic efficiency

Pending Publication Date: 2021-12-24
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cu 2 O photocatalysts also have some problems such as easy recombination of photogenerated charge pairs and easy oxidation to CuO in a humid environment.

Method used

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  • FeOOH/Cu2O composite microsphere photocatalyst and preparation method thereof
  • FeOOH/Cu2O composite microsphere photocatalyst and preparation method thereof
  • FeOOH/Cu2O composite microsphere photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] FeOOH / Cu 2 The preparation method of O composite microsphere photocatalyst comprises the following steps:

[0035] S1. Preparation of FeOOH powder:

[0036] S1-1, 27.8 g ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) with 15.8 g ammonium bicarbonate (NH 4 HCO 3) mixed and ground for 10 minutes, after mixing and ground, 30 g of water was added to make a slurry, then the resulting slurry was stirred for 10 minutes and then filtered to obtain a filter cake;

[0037] S1-2. Add water with 0.5 times the weight of the filter cake to prepare a slurry, and pass ozone gas into the slurry for 10 minutes to carry out the oxidation reaction. At the same time, control the pH value of the slurry to maintain at 9.0, and then perform suction filtration on the slurry to obtain FeOOH, and the obtained FeOOH Drying is carried out to obtain FeOOH powder, and the FeOOH powder is ground for 10 minutes for later use, and the FeOOH is α-FeOOH;

[0038] S2, preparation of nano Cu 2 O dispe...

Embodiment 2

[0044] FeOOH / Cu 2 The preparation method of O composite microsphere photocatalyst comprises the following steps:

[0045] S1. Preparation of FeOOH powder:

[0046] S1-1, 40.0 g iron sulfate (Fe 2 (SO 4 ) 3 ) with 14.4 g ammonium carbonate ((NH 4 ) 2 CO 3 ) was mixed and ground for 60 minutes, after mixing and ground, 60 g of water was added to make a slurry, then the resulting slurry was stirred for 20 minutes and then filtered to obtain a filter cake;

[0047] S1-2. Add water twice the mass of the filter cake to prepare a slurry, and pass air into the slurry for 20 minutes to carry out the oxidation reaction. At the same time, the pH value of the slurry is kept at 10.0. When Fe in the slurry is detected 2+ Stop the reaction when / Fe is less than 4%, then suction filter the slurry to obtain FeOOH, dry the obtained FeOOH to obtain FeOOH powder, grind the FeOOH powder for 10min for later use, and the FeOOH is α-FeOOH;

[0048] S2, preparation of nano Cu 2 O dispersion: ...

Embodiment 3

[0052] FeOOH / Cu 2 The preparation method of O composite microsphere photocatalyst comprises the following steps:

[0053] S1. Preparation of FeOOH powder:

[0054] S1-1, 27.8 g ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O) with 9.6 g ammonium carbonate ((NH 4 ) 2 CO 3 ) was mixed and ground for 40 minutes, after mixing and ground, 60 g of water was added to make a slurry, then the resulting slurry was stirred for 60 minutes and then filtered to obtain a filter cake;

[0055] S1-2. Add water 3 times the weight of the filter cake to prepare a slurry, and inject oxygen into the slurry for 15 minutes to react, while controlling the pH value of the slurry at 7.5, stop the reaction after injecting oxygen for 40 minutes, and then pump the slurry FeOOH was obtained by filtration, and the obtained FeOOH was dried to obtain FeOOH powder, and the FeOOH powder was ground for 10 minutes for later use, and the FeOOH was α-FeOOH;

[0056] S2, preparation of nano Cu 2 O dispersion:

...

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Abstract

The invention relates to a FeOOH / Cu2O composite microsphere photocatalyst and a preparation method thereof, and belongs to the technical field of photocatalysts, FeOOH nanoneedles and Cu2O nanoparticles are compounded to form a solid microsphere photocatalyst, the mass ratio of FeOOH to Cu2O is (0.2-30) / 100, and the preparation method comprises the following steps: preparing FeOOH powder, preparing a nano Cu2O dispersion liquid, mixing the FeOOH powder and the nano Cu2O dispersion liquid, stirring, carrying out centrifugal separation, and repeatedly washing the obtained solid with deionized water and absolute ethyl alcohol for several times, and drying in a drying oven to obtain the FeOOH / Cu2O composite microsphere photocatalyst. The obtained composite microsphere photocatalyst has the advantages of being wide in light absorption wavelength range, better in stability, higher in quantum efficiency, higher in activity and the like, the preparation method is simple, operation is convenient, and application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, in particular to a FeOOH / Cu 2 O composite microsphere photocatalyst and preparation method thereof. Background technique [0002] Cuprous oxide (Cu 2 O) is a typical p-type semiconductor material with a low band gap of about 2.1eV. It can be excited to form photogenerated electrons and hole pairs under visible light irradiation and has good photocatalytic performance, avoiding traditional wide band gap photocatalytic materials ( ZnO, TiO 2 etc.) can not effectively utilize the defects of visible light, therefore, it has the advantages of high sunlight utilization efficiency, no secondary pollution, low price, simple preparation, etc., and is a promising new photocatalytic material. However, Cu 2 O photocatalysts also have some problems such as easy recombination of photogenerated charge pairs and easy oxidation to CuO in humid environment. [0003] Iron oxyhydroxide (FeOOH) is an impo...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/745B01J35/00B01J35/08C02F1/30C02F101/30
CPCB01J23/72B01J23/745C02F1/30C02F2305/10C02F2101/308B01J35/39B01J35/51
Inventor 邹欣伟张风頔王国斌田玉明
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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