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A heterojunction photocatalyst casb 2 o 6 /g-c 3 no 4 The preparation method and its application

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

Active Publication Date: 2022-03-08
CHONGQING UNIV OF EDUCATION +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, due to intrinsic defects such as poor visible light absorption and low quantum efficiency, the development of its photocatalysis is largely limited.

Method used

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  • A heterojunction photocatalyst casb <sub>2</sub> o <sub>6</sub> /g-c <sub>3</sub> no <sub>4</sub> The preparation method and its application
  • A heterojunction photocatalyst casb <sub>2</sub> o <sub>6</sub> /g-c <sub>3</sub> no <sub>4</sub> The preparation method and its application
  • A heterojunction photocatalyst casb <sub>2</sub> o <sub>6</sub> /g-c <sub>3</sub> no <sub>4</sub> The preparation method and its application

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Experimental program
Comparison scheme
Effect test

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 After mixing and grinding with absolute ethanol at a certain ...

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Abstract

The invention discloses a heterojunction photocatalyst CaSb 2 o 6 / g‑C 3 N 4 The preparation method and its application in the degradation of antibiotics under visible light, the method includes: using solid-phase sintering method to prepare CaSb 2 o 6 and g‑C 3 N 4 , then the CaSb 2 o 6 and g‑C 3 N 4 Mix and add a certain amount of absolute ethanol to mix and grind for 30 minutes, then sinter in a muffle furnace at a constant temperature of 480°C for 2 hours, and then naturally cool down to room temperature to obtain a heterojunction CaSb 2 o 6 / g‑C 3 N 4 Photocatalyst, heterojunction CaSb prepared by this method 2 o 6 / g‑C 3 N 4 The photocatalyst has a good photocatalytic effect in degrading the antibiotic tetracycline, and the photocatalytic property is stable.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24C02F1/30C02F2305/10C02F2101/38B01J35/39
Inventor 李园园沈金凤
Owner CHONGQING UNIV OF EDUCATION
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