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Preparation method of visible light response high-efficiency composite photocatalyst g-C3N4/alpha-FeOOH/Ag

A technology of g-c3n4 and composite light, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low reduction ability of photogenerated electrons, low photocatalytic activity, and difficult separation of electrons and holes and other problems, to achieve the effect of facilitating degradation, high photocatalytic activity, and improving photocatalytic activity

Inactive Publication Date: 2019-04-12
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, goethite (α-FeOOH) cannot reduce the electron acceptor O due to its low photogenerated electron reduction ability. 2 , leading to the difficulty of electron-hole separation, resulting in lower photocatalytic activity

Method used

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  • Preparation method of visible light response high-efficiency composite photocatalyst g-C3N4/alpha-FeOOH/Ag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] High-efficiency composite photocatalyst g-C responsive to visible light of the present invention 3 N 4 The preparation method of / α-FeOOH / Ag, comprises the steps:

[0031] 1) Mechanical grinding: Weigh 0.1g of α-FeOOH nanoparticles and 0.8g of g-C 3 N 4 Nanoparticles (by mass ratio α-FeOOH nanoparticles: g-C 3 N 4 Nanoparticles = 1:8) Grind in an agate mortar for 5 minutes to fully compound the two materials and form g-C 3 N 4 / α-FeOOH composite solid material;

[0032] 2) Photorecombination: Take 0.4g of g-C obtained in the above step 1) 3 N 4 / α-FeOOH composite solid material in a beaker, add 50ml deionized water, then add 0.01gAgNO 3 Powder (AgNO 3 powder with g-C 3 N 4 / α-FeOOH solid composite material with a mass ratio of 1:40), stirred for 90min under visible light conditions and then separated from solid to liquid to obtain a solid phase;

[0033] 3) Drying and grinding: Dry the solid phase obtained in step 2) at 70°C for 10 hours, and finally grind...

Embodiment 2

[0037] High-efficiency composite photocatalyst g-C responsive to visible light of the present invention 3 N 4 The preparation method of / α-FeOOH / Ag, comprises the steps:

[0038] 1) Mechanical grinding: Weigh 0.1g of α-FeOOH nanoparticles and 0.2g of g-C 3 N 4 Nanoparticles (by mass ratio α-FeOOH nanoparticles: g-C 3 N 4 Nanoparticles = 1:2) Grind in an agate mortar for 10 minutes to fully compound the two materials and form g-C 3 N 4 / α-FeOOH composite solid material;

[0039] 2) Photorecombination: take 0.5g of g-C obtained in the above step 1) 3 N 4 / α-FeOOH composite solid material in a beaker, add 60ml deionized water, then add 0.01gAgNO 3 Powder (AgNO 3 powder with g-C 3 N 4 The mass ratio of / α-FeOOH solid composite material is 1:50), using a xenon lamp as the light source, the light wavelength range is 400nm, stirring under light conditions for 90-120min and then undergoing solid-liquid separation to obtain a solid phase;

[0040] 3) Drying and grinding: ...

Embodiment 3

[0044] High-efficiency composite photocatalyst g-C responsive to visible light of the present invention 3 N 4 The preparation method of / α-FeOOH / Ag, comprises the steps:

[0045] 1) Mechanical grinding: Weigh 0.1g of α-FeOOH nanoparticles and 0.6g of g-C 3 N 4 Nanoparticles (by mass ratio α-FeOOH nanoparticles: g-C 3 N 4 Nanoparticles = 1:6) Grind in an agate mortar for 10 minutes to fully compound the two materials and form g-C 3 N 4 / α-FeOOH composite solid material;

[0046] 2) Photorecombination: Take 0.6g of g-C obtained in the above step 1) 3 N 4 / α-FeOOH composite solid material in a beaker, add 80ml deionized water, then add 0.01gAgNO 3 Powder (AgNO 3 powder with g-C 3 N 4 The mass ratio of / α-FeOOH solid composite material is 1:60), using a xenon lamp as the light source, the light wavelength range is 800nm, stirring for 120min under light conditions and then undergoing solid-liquid separation to obtain a solid phase;

[0047] 3) Drying and grinding: Dry...

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Abstract

The invention discloses a preparation method of a visible light response high-efficiency composite photocatalyst g-C3N4 / alpha-FeOOH / Ag, which comprises the following steps of: 1) mechanical grinding:uniformly mixing g-C3N4 nanoparticles with alpha-FeOOH nanoparticles, grinding to fully mix the mixture to form a g-C3N4 / alpha-FeOOH composite solid material; 2) carrying out illumination compounding:pouring the g-C3N4 / alpha-FeOOH composite solid material obtained in step 1) into deionized water, adding AgNO3 powder, stirring and reacting for 90-120min under the condition of illumination, and performing solid-liquid separation to obtain a solid phase; 3) drying and grinding: drying and grinding the solid phase obtained in step 2) to obtain a g-C3N4 / alpha-FeOOH / Ag composite material. The preparation method not only widens the absorption of visible light, but also can effectively inhibit charge recombination, has higher photocatalytic activity and is beneficial to the degradation of organicmatters.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a high-efficiency composite photocatalyst g-C that responds to visible light 3 N 4 The preparation method of / α-FeOOH / Ag. Background technique [0002] Goethite (α-FeOOH) is a visible light-responsive semiconductor with a band gap of 2.15-2.6eV. Compared with other photocatalysts, α-FeOOH has mild preparation conditions, simple process, low price, and non-toxic properties. , rich natural reserves and other advantages. α-FeOOH is an environmentally friendly material, so it has many applications in the field of environmental restoration, such as photocatalytic degradation of dyes, organic acids, and aldehydes. [0003] However, goethite (α-FeOOH) cannot reduce the electron acceptor O due to its low photogenerated electron reduction ability. 2 , leading to the difficulty of electron-hole separation, resulting in low photocatalytic activity. Based on the above reasons, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30B01J27/24C02F101/38C02F101/36C02F101/34C02F101/30
CPCC02F1/30B01J27/24C02F2305/10C02F2101/38C02F2101/36C02F2101/34C02F2101/308B01J35/39
Inventor 张英陈怡
Owner YANGTZE UNIVERSITY
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