V2O5/C3N4 composite photocatalyst as well as preparation method and application thereof

A technology of C3N4 and composite light, which is applied in the field of photocatalysis, can solve the problems of long degradation time of organic dyes, complicated preparation methods, and low degradation efficiency, and achieve excellent photocatalytic degradation activity, solve dye pollution, and simple operation

Pending Publication Date: 2022-05-27
鞍钢集团北京研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The V prepared by the current existing technology 2 o 5 / C 3 N 4 The degradation time of organic dyes is long, the degradation efficiency is low, and its preparation method is relatively complicated and the cost is high

Method used

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  • V2O5/C3N4 composite photocatalyst as well as preparation method and application thereof

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preparation example Construction

[0026] Embodiments of the present invention provide a V 2 O 5 / C 3 N 4 The preparation method of composite photocatalyst comprises the following steps:

[0027] a. Filter and dilute the failed vanadium battery electrolyte;

[0028] b, adding activated carbon adsorbent to the diluted electrolyte, and performing vibration treatment to obtain vanadium-containing activated carbon after adsorption, filtration and drying;

[0029] c. Add melamine to the vanadium-containing activated carbon, after grinding and mixing, the mixed sample is calcined in one step to obtain V 2 O 5 / C 3 N 4 composite photocatalyst.

[0030] A V according to an embodiment of the present invention 2 O 5 / C 3 N 4In the preparation method of the composite photocatalyst, in step a, the failed vanadium battery electrolyte includes a positive electrode electrolyte mainly composed of tetravalent vanadium and pentavalent vanadium and / or a negative electrode electrolyte composed of divalent vanadium and ...

Embodiment 1

[0037] a V 2 O 5 / C 3 N 4 The preparation method of composite photocatalyst comprises the following steps:

[0038] Take 1L of the vanadium battery electrolyte that has failed, filter to remove solid insolubles and suspended solids; then dilute it and place it in a conical flask, and measure the total vanadium ion concentration in the electrolyte by potentiometric titration to 1.4×10 -3 M; Weigh 0.05g of activated carbon and add it to the conical flask. After mixing evenly, place the conical flask in a constant temperature shaker, shake it at 20°C for 24 hours, and filter it; then put it in an oven for drying to obtain vanadium-containing Activated carbon powder.

[0039] Weigh 22g of melamine, place the melamine and the above-mentioned vanadium-containing activated carbon powder in an agate mortar, fully grind and evenly put it into a crucible; then place the crucible in a muffle furnace, and heat up to 5°C / min. 500 ℃, hold for 5h; after cooling to room temperature, get ...

Embodiment 2

[0042] a V 2 O 5 / C 3 N 4 The preparation method of composite photocatalyst comprises the following steps:

[0043] Take 1L of the vanadium battery electrolyte that has failed, filter to remove solid insolubles and suspended solids; then dilute it and place it in a conical flask, and measure the total vanadium ion concentration in the electrolyte by potentiometric titration to 1.4×10 -3 M; then weigh 0.05g of activated carbon and add it to the conical flask, after mixing evenly, place the conical flask in a constant temperature shaker, shake it at 30°C for 18 hours, and filter it; then put it in an oven for drying to obtain vanadium-containing Activated carbon powder.

[0044] Weigh 17.6 g of melamine, place the melamine and the above-mentioned vanadium-containing activated carbon powder in an agate mortar, fully grind them evenly, and put them into a crucible; then place the crucible in a muffle furnace, and heat up at a heating rate of 5°C / min. to 550°C and kept for 4h;...

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Abstract

The invention discloses a V2O5 / C3N4 composite photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: a, filtering and diluting a failed vanadium battery electrolyte; b, adding activated carbon into the diluted electrolyte, and carrying out oscillation treatment, adsorption, filtration and drying to obtain vanadium-containing activated carbon; and c, adding melamine into the vanadium-containing activated carbon, grinding, mixing, and carrying out one-step calcination to obtain the V2O5 / C3N4 composite photocatalyst. The V2O5 / C3N4 composite photocatalyst prepared by the method disclosed by the invention shows excellent photocatalytic degradation activity; the method can be used for synthesizing the product only through one-step calcination, and is simple to operate and suitable for industrial production; in addition, the invalid vanadium battery electrolyte is used as a vanadium source, so that the recycling of the waste electrolyte is realized, and the production cost is saved.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular, the invention relates to a kind of V 2 O 5 / C 3 N 4 Composite photocatalyst and preparation method and application thereof. Background technique [0002] With the rapid development of textile, leather and other industries, various dyes have been successfully developed and widely used. However, all kinds of dyes will inevitably produce a large amount of pollutants after use, especially all kinds of dye wastewater, which have the characteristics of dark color, high concentration, complex composition and not easy to be biochemically degraded. According to incomplete statistics, 1-20% of the total amount of dyes in the world will be discharged into water and soil, causing serious dye pollution. It is worth noting that most dye molecules contain aromatic rings, which are seriously toxic to organisms, especially strong mutagenicity to humans. In addition, dye pollutants generally have...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/38
CPCB01J27/24C02F1/30C02F2101/40C02F2101/38C02F2305/10C02F2101/308B01J35/39Y02E60/50
Inventor 高荣荣尹翔鹭曾泽华代宇滕艾均张东彬
Owner 鞍钢集团北京研究院有限公司
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