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Lattice defect-containing difunctional bismuth subcarbonate catalyst and preparation method thereof

A kind of bismuth oxycarbonate catalyst, lattice defect technology, applied in the field of catalysis

Inactive Publication Date: 2015-03-11
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although photocatalysis and room temperature catalysis have significant technical advantages, so far, the coupling of photocatalysis and room temperature catalysis to catalyze the removal of air pollutants, and the further development of catalysts with dual functions of room temperature catalysis and photocatalysis have not been reported.

Method used

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  • Lattice defect-containing difunctional bismuth subcarbonate catalyst and preparation method thereof
  • Lattice defect-containing difunctional bismuth subcarbonate catalyst and preparation method thereof
  • Lattice defect-containing difunctional bismuth subcarbonate catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Put 1.5 g of pure-phase bismuth oxycarbonate in a vacuum treatment tube, and heat-treat it for 3 hours at a vacuum degree of 50 mmHg and a heat treatment temperature of 225° C. to obtain light black bismuth oxycarbonate. After the heat treatment, wait for it to cool down to room temperature, and put it in a sample tube for use.

[0033] The present invention carries out XRD analysis to the bismuth oxycarbonate catalyst obtained after vacuum heat treatment, as figure 1 Shown, the bismuth oxycarbonate catalyst that present embodiment prepares has (BiO) 2 CO 3 phase and a small amount of bismuth elemental phase; the present invention carries out SEM scanning analysis to the bismuth oxycarbonate catalyst prepared by the present embodiment, and the result shows that the morphology of the bismuth oxycarbonate catalyst prepared by the present embodiment is consistent with the morphology of the pure phase bismuth oxycarbonate, so The vacuum heat treatment did not destroy the ...

Embodiment 2

[0036] Put 1.5g of pure-phase bismuth oxycarbonate in a vacuum treatment tube, and heat-treat it for 3 hours under the conditions of a vacuum degree of 50mmHg and a heat treatment temperature of 250°C to obtain black bismuth oxycarbonate. After the heat treatment, wait for it to cool down to room temperature, and put it in a sample tube for use.

[0037] The present invention carries out XRD analysis to the bismuth oxycarbonate catalyst obtained after vacuum heat treatment, and the result shows that the bismuth oxycarbonate catalyst prepared by the present embodiment has (BiO) 2 CO 3 phase and bismuth single substance phase; the present invention carries out SEM scanning analysis to the bismuth oxycarbonate catalyst prepared by the present embodiment, as figure 2 , image 3 As shown, the result shows that the morphology of the bismuth oxycarbonate catalyst prepared by the present embodiment is consistent with the morphology of the pure phase bismuth oxycarbonate, so the vac...

Embodiment 3

[0040] Put 1.5g of pure-phase bismuth oxycarbonate in a vacuum treatment tube, and heat-treat it for 3 hours under the conditions of vacuum degree of 50mmHg and heat treatment temperature of 275°C to obtain black bismuth oxycarbonate. After the heat treatment, wait for it to cool down to room temperature, and put it in a sample tube for use.

[0041] The present invention carries out XRD analysis to the bismuth oxycarbonate catalyst obtained after vacuum heat treatment, as Figure 5 As shown, the result shows that the bismuth oxycarbonate catalyst prepared by the present embodiment has (BiO) 2 CO 3 phase and bismuth single substance phase; the present invention carries out SEM scanning analysis to the bismuth oxycarbonate catalyst prepared by the present embodiment, and the result shows that the morphology of the bismuth oxycarbonate catalyst prepared by the present embodiment is consistent with the morphology of the pure phase bismuth oxycarbonate, so vacuum heat treatment ...

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Abstract

The invention discloses a lattice defect-containing difunctional bismuth subcarbonate catalyst and a preparation method thereof. The preparation method comprises that pure-phase bismuth subcarbonate is subjected to vacuum heat treatment to form the lattice defect-containing difunctional bismuth subcarbonate catalyst. The lattice defect-containing difunctional bismuth subcarbonate catalyst has normal-temperature catalysis effects and substantial visible light photocatalysis effects. An experiment result shows that the lattice defect-containing difunctional bismuth subcarbonate catalyst has a NO removal rate of 40-60% at a normal temperature under visible light irradiation. The preparation method has simple processes and obvious effects, effectively improves photocatalysis performances of bismuth subcarbonate and gives normal-temperature catalysis performances for bismuth subcarbonate.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a bifunctional bismuth oxycarbonate catalyst containing lattice defects and a preparation method thereof. Background technique [0002] In recent years, indoor air pollution has seriously endangered the health of the population, not only causing serious diseases such as respiratory system and cardiovascular system, but even leading to death. NO X It is a typical pollutant in indoor air pollution. Although its concentration is low, it is a highly harmful acid gas, and it is transmitted through the air, transformed and participates in the formation of secondary pollutants such as photochemical smog and PM2.5. Therefore, the removal of indoor low Concentration of NO X It is an important part of indoor air purification. High concentrations of NO from industrial emissions X Generally, it is removed by selective catalytic reduction (SCR), chemical absorption, biological filtratio...

Claims

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Application Information

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IPC IPC(8): B01J27/232B01J37/08B01D53/56B01D53/86
Inventor 董帆熊婷孙艳娟倪紫琳
Owner CHONGQING TECH & BUSINESS UNIV
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