Preparation method and application of heterojunction photocatalyst CaSb2O6/g-C3N4

A photocatalyst, g-c3n4 technology, applied in the field of environmental protection and pollutant degradation, can solve the problems of low quantum efficiency, poor visible light absorption, limited photocatalysis development, etc., to achieve stable catalytic properties, conducive to environmental protection treatment, good catalysis The effect of degradation

Active Publication Date: 2019-08-02
CHONGQING UNIV OF EDUCATION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to intrinsic defects such as poor visible light absorption and...

Method used

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  • Preparation method and application of heterojunction photocatalyst CaSb2O6/g-C3N4
  • Preparation method and application of heterojunction photocatalyst CaSb2O6/g-C3N4
  • Preparation method and application of heterojunction photocatalyst CaSb2O6/g-C3N4

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Embodiment 1

[0037] Embodiment 1 solid-phase method prepares CaSb 2 o 6 / g -C 3 N 4 Heterojunction.

[0038] The preparation process is as follows:

[0039] 1) Weigh 1mmol CaCO respectively 3 , 1.05 mmol Sb 2 o 3 After mixing and grinding for 30 minutes, transfer to a corundum crucible;

[0040] 2) Put the corundum crucible into a high-temperature muffle furnace, sinter at 870°C for 10 hours, and after natural cooling, finally produce CaSb 2 o 6 Precursor;

[0041] 3) Weigh 1g of melamine and mix it evenly, transfer it to a corundum crucible, put the corundum crucible into a muffle furnace, and sinter at 560°C for 2 hours at a heating rate of 4°C / min, and then naturally cool down to obtain g-C 3 N 4 Precursor;

[0042] 4) The prepared g-C 3 N 4 Dilute HNO with 0.1mol / L 3 Wash, stir, then wash with absolute ethanol, finally wash with water, and dry;

[0043] 5) According to the precursor CaSb 2 o 6 , g-C 3 N 4 Mix with absolute ethanol at a mass ratio of 1:19:30 and grin...

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Abstract

The invention discloses a preparation method of a heterojunction photocatalyst CaSb2O6/g-C3N4 and an application of the heterojunction photocatalyst CaSb2O6/g-C3N4 in degradation of antibiotics undervisible light. The method comprises the following steps: preparing CaSb2O6 and g-C3N4 respectively with a solid state sintering method, then, mixing the CaSb2O6 and g-C3N4, adding a certain amount ofabsolute ethyl alcohol, performing mixing and grinding for 30 min, performing sintering at the constant temperature of 480 DEG C in a muffle furnace for 2 h, and naturally cooling a product to room temperature to obtain the heterojunction CaSb2O6/g-C3N4 photocatalyst. The heterojunction CaSb2O6/g-C3N4 photocatalyst prepared with the method has good photocatalytic effects in degradation of antibiotic tetracycline and has stable photocatalytic properties.

Description

technical field [0001] The invention belongs to the field of environmental protection and the technical field of pollutant degradation, in particular to a heterojunction photocatalyst CaSb 2 o 6 / g -C 3 N 4 Preparation and application in visible light photocatalytic degradation of antibiotics and environmental protection. Background technique [0002] In recent years, the problem of water pollution has become more and more serious, especially the concentration of antibiotics remaining in water exceeds the standard, which poses a serious hazard to people's lives. To overcome these challenges, photocatalytic technologies based on semiconductor photocatalysis have attracted extensive attention for the degradation of antibiotic substances in water. When photons with energy greater than or equal to the semiconductor band gap are irradiated on the surface of the photocatalyst, electron-hole pairs will be generated, and photocatalytic reactions will be carried out by using the ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24B01J35/004C02F1/30C02F2305/10C02F2101/38
Inventor 李园园沈金凤
Owner CHONGQING UNIV OF EDUCATION
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