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Efficient double-Z-type heterojunction material and preparation method and application thereof

A heterojunction, high-efficiency technology, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., to achieve enhanced redox ability, large specific surface area, and high crystallinity

Pending Publication Date: 2021-12-21
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no relevant report on the use of LaOCl for the aforementioned photocatalysts.

Method used

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  • Efficient double-Z-type heterojunction material and preparation method and application thereof
  • Efficient double-Z-type heterojunction material and preparation method and application thereof
  • Efficient double-Z-type heterojunction material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment prepares 60%LaOCl / 40%CeO according to the following steps 2 -g -C 3 N 4 Photocatalyst, the specific steps are as follows:

[0041] 1) Put 3 g of melamine in a mixture of 10 ml of water and 10 ml of ethanol and stir evenly;

[0042] 2) Add 0.36gLa(NO 3 ) 3 ·6H 2 O and 0.24gCe(NO 3 ) 3 ·6H 2 O was dissolved in 5ml of aqueous solution, and was titrated in 1) at a uniform speed, and stirred until the titration was complete until it was evenly mixed;

[0043] 3) Aging the homogeneous solution obtained in 2) at 50°C for 12 hours;

[0044] 4) drying the aged solution obtained in 3) at 80°C;

[0045] 5) Place the dried mixture in a mortar and mix it with 10ml of ethanol for 15 minutes;

[0046] 6) Add 9gKCl and 9gLiCl, grind and mix to form a paste;

[0047] 7) Transfer the paste to a corundum crucible, place the crucible in a muffle furnace and raise the temperature to 520°C / min at 5°C / min, and keep it warm for 4h;

[0048] 8) The cooled product wa...

Embodiment 2

[0050] This embodiment prepares 10%LaOCl / 90%CeO according to the following steps 2 -g -C 3 N 4 Photocatalyst, the specific steps are as follows:

[0051] 1) Put 3 g of melamine in a mixture of 9 ml of water and 6 ml of ethanol and stir evenly;

[0052] 2) Add 0.06gLa(NO 3 ) 3 ·6H 2 O and 0.54gCe(NO 3 ) 3 ·6H 2 O was dissolved in 5ml of aqueous solution, and was titrated in 1) at a uniform speed, and stirred until the titration was complete until it was evenly mixed;

[0053] 3) Aging the homogeneous solution obtained in 2) at 40°C for 10 hours;

[0054] 4) drying the aged solution obtained in 3) at 60°C;

[0055] 5) Place the dried mixture in a mortar and mix it with 10ml of ethanol for 10min;

[0056] 6) Add 9gKCl and 9gLiCl, grind and mix to form a paste;

[0057] 7) Transfer the paste to a corundum crucible, place the crucible in a muffle furnace and raise the temperature from 8°C / min to 500°C / min, and keep it warm for 8h;

[0058] 8) The cooled product was was...

Embodiment 3

[0060] This embodiment prepares 90%LaOCl / 10%CeO according to the following steps 2 -g -C 3 N 4 Photocatalyst, the specific steps are as follows:

[0061] 1) Place 3 g of melamine in a mixture of 24 ml of water and 36 ml of ethanol and stir evenly;

[0062] 2) Add 0.54gLa(NO 3 ) 3 ·6H 2 O and 0.06gCe(NO 3 ) 3 ·6H 2 O was dissolved in 5ml of aqueous solution, and was titrated in 1) at a uniform speed, and stirred until the titration was complete until it was evenly mixed;

[0063] 3) Aging the homogeneous solution obtained in 2) at 80°C for 15 hours;

[0064] 4) drying the aged solution obtained in 3) at 100°C;

[0065] 5) Place the dried mixture in a mortar and mix it with 10ml of ethanol for 30min;

[0066] 6) Add 14.4g KCl and 14.4g LiCl, grind and mix to form a paste;

[0067]7) Transfer the paste to a corundum crucible, place the crucible in a muffle furnace and raise the temperature from 10°C / min to 600°C / min, and keep it warm for 2h;

[0068] 8) The cooled pr...

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Abstract

The invention discloses an efficient double-Z-type heterojunction material and a preparation method and application thereof. The composite material is composed of LaOCl, CeO2 and g-C3N4, namely, the composite material is LaOCl / CeO2-g-C3N4, and the g-C3N4 is used as a matrix. According to preparation method of the LaOCl / CeO2-g-C3N4 double-Z-type heterojunction material, g-C3N4 is taken as the matrix, LaOCl and CeO2 are loaded on the matrix in a mode of combining a hydrothermal method and a salt dissolution method, and then the LaOCl / CeO2-g-C3N4 double-Z-type heterojunction material is prepared. The heterojunction material disclosed by the invention has the characteristics of high crystallinity, large specific surface area, low carrier recombination rate and wide light absorption range, and has relatively strong adsorbability and photocatalytic performance; and the preparation method has the characteristics of simplicity in operation, short period and high purity, and is a clean, efficient and low-energy-consumption photocatalytic degradation material for organic pollutants, which is suitable for popularization and application.

Description

technical field [0001] The invention relates to a heterojunction material and its preparation method and application, in particular to a high-efficiency double Z-type heterojunction photocatalyst material and its preparation method and application. Background technique [0002] Photocatalysis is based on the redox ability of photocatalysts under light conditions to degrade pollutants. It has attracted much attention because of its advantages of high efficiency, simplicity and environmental protection. Photocatalysts can realize self-activation under light conditions, accelerate redox reactions, and thus achieve the degradation of pollutants. g-C 3 N 4 As an emerging photocatalytic material, it has been widely used in water splitting, organic dye degradation, CO 2 Reduction and electrochemical sensors and other fields. Yet all obtain g-C as application publication number CN111715261A patent etc. 3 N 4 Photocatalyst products, because of their shortcomings such as small ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24C02F1/30C02F2305/10C02F2101/40C02F2101/38B01J35/39
Inventor 兰苑培储智尧李军旗陈朝轶宁德阳毛锡嵩刘丰源张俊山王凡邹舟
Owner GUIZHOU UNIV
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