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High-activity composite bismuth vanadate photocatalyst and preparation method thereof

A technology of compounding bismuth vanadate and photocatalyst is applied in the field of photocatalysis to achieve the effects of increasing specific surface area, improving removal rate, and degrading wastewater efficiently and quickly

Active Publication Date: 2018-10-19
江苏海川卓越密封材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a high-activity composite bismuth vanadate photocatalyst and its preparation method, which solves the problems of having good catalytic activity, degrading coal chemical industry wastewater quickly and efficiently, and being easy to recycle and environmentally friendly.

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  • High-activity composite bismuth vanadate photocatalyst and preparation method thereof
  • High-activity composite bismuth vanadate photocatalyst and preparation method thereof
  • High-activity composite bismuth vanadate photocatalyst and preparation method thereof

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Embodiment 1

[0022] One, the preparation of embodiment 1 highly active composite bismuth vanadate photocatalyst

[0023] (1) Nano-bismuth vanadate and magnetic particles were prepared according to the mass ratios described in Table 1, respectively, to obtain 3 groups of highly active composite bismuth vanadate photocatalysts I-III.

[0024] Table 1 Highly active composite bismuth vanadate photocatalysts I-III composed of two components in different proportions (mass ratio)

[0025] catalyst of light

Mass ratio of bismuth vanadate precursor (A) to magnetic particles (B)

I

A:B=1.5:0.08

II

A:B=3:0.5

III

A:B=2:0.15

[0026] (2) The preparation method of highly active composite bismuth vanadate photocatalyst I

[0027] Step 1. Magnetic particle SiO 2 / NiFe 2 o 4 Preparation: FeCl with a molar ratio of 2:1 3 and NiCl 2 Dissolve in deionized water, add NaOH solution dropwise under high-speed stirring, adjust the pH value to 10, stir and react...

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Abstract

The invention discloses a high-activity composite bismuth vanadate photocatalyst which is prepared from magnetic particle SiO2 / NiFe2O4-loaded nano bismuth vanadate; and the mass ratio of nano bismuthvanadate to magnetic particles is (1.5-3):(0.08-0.5). Compared with the prior art, the high-activity composite bismuth vanadate photocatalyst has the advantages that lignin amine is taken as a template, the direct contact among particles is reduced by a steric-hinerance effect, agglomeration generated under a hydrogen bond or a Vander Wale force is avoided, the magnetic particles are introduced, acatalyst is fast separated from a solution through an external magnetic field, the recycling of the photocatalyst is realized, the addition of the magnetic particles can cause distortion of bismuth vanadate lattices, increase the specific surface area of the catalyst and improve the photocatalytic activity; and compared with a conventional single ozone oxidation technology, the removal rate of pollutants is remarkably increased, visible light irradiation accelerates ozone to fast generate OH, the degradation of intermediate products with higher toxicity and difficultly-degraded small molecular substances is accelerated, the catalyst dosage is small, the raw materials are rich and easily available, the photocatalyst can be repeatedly used, and the sewage treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a high-activity composite bismuth vanadate photocatalyst and a preparation method thereof. Background technique [0002] Modern coal chemical industry mainly refers to coal-to-gas, coal-to-oil, coal-to-olefin, coal-to-ethylene glycol, etc. Modern coal chemical industry is an important way to realize the clean and efficient utilization of coal, and is an important direction encouraged by the state. With the gradual improvement of people's awareness of environmental protection, they no longer meet the standard discharge of wastewater, but pay more attention to the recycling of wastewater and the protection of water resources. This makes the treatment of high-salt wastewater a priority for coal chemical companies. Key research questions. [0003] The high-salt wastewater of coal chemical industry mainly comes from the concentrated brine produced by membrane concentration or ...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J35/00C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725B01J23/22C02F2101/30C02F2305/023B01J35/33B01J35/39
Inventor 吴德斌
Owner 江苏海川卓越密封材料有限公司