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PDI-loaded biochar photocatalyst and preparation method and use method thereof

A technology of photocatalyst and biochar, applied in the direction of physical/chemical process catalyst, chemical instrument and method, organic compound/hydride/coordination complex catalyst, etc., can solve the threat of ecological environment and human health, iohexol wastewater Standard discharge, effective removal and other problems, to achieve the effect of practical operability, no secondary pollution, energy saving

Active Publication Date: 2020-11-10
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After being inhaled by the human body, IOH will be discharged into the public drainage system in a short period of time. Due to its stable structure, traditional sewage treatment plants cannot effectively remove it, and its discharge into the environment poses a threat to the ecological environment and human health
Traditional water treatment processes are difficult to discharge iohexol wastewater up to standard, so finding an efficient and stable iohexol wastewater treatment technology has become an urgent problem

Method used

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  • PDI-loaded biochar photocatalyst and preparation method and use method thereof
  • PDI-loaded biochar photocatalyst and preparation method and use method thereof
  • PDI-loaded biochar photocatalyst and preparation method and use method thereof

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Effect test

Embodiment 1

[0030] The PDI-loaded biochar photocatalyst of this embodiment is a persulfate system activated by the PDI-loaded biochar photocatalyst under visible light, and the mass ratio of the PDI-loaded biochar photocatalyst to the persulfate is 25:17.9.

[0031] The preparation method of the PDI loaded biochar photocatalyst of the present embodiment comprises the steps:

[0032] (1) Put perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine and imidazole at a mass ratio of 1:1.8:10 in a four-necked flask under a nitrogen atmosphere at a temperature of 110°C Organic synthesis, adding ethanol and HCl at a mass ratio of 150:18 and stirring to obtain a stirred product;

[0033] (2) Filtrating and washing the stirred product to neutrality and drying to obtain PDI powder, wherein the filter membrane pore size is 0.22 μm, and the drying temperature is 60° C.;

[0034] (3) Prepare 50mL PDI stock solution, add triethylamine, stir for 30min, add BC and then add 5mL HNO 3 solution, heated to...

Embodiment 2

[0037] The PDI-loaded biochar photocatalyst of this embodiment is a persulfate system activated by the PDI-loaded biochar photocatalyst under visible light, and the mass ratio of the PDI-loaded biochar photocatalyst to the persulfate is 25:5.37.

[0038] The preparation method of the PDI loaded biochar photocatalyst of the present embodiment comprises the steps:

[0039] (1) Put perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine and imidazole at a mass ratio of 1:1.8:10 in a four-necked flask under a nitrogen atmosphere at a temperature of 100°C Organic synthesis, adding ethanol and HCl at a mass ratio of 160:18 and stirring to obtain a stirred product;

[0040] (2) Filtrating, washing to neutrality and drying the stirred product to obtain PDI powder, wherein the filter membrane pore size is 0.45 μm, and the drying temperature is 50° C.;

[0041] (3) Prepare 50mL of PDI stock solution, add triethylamine, stir for 30min, add BC and then add 3mL HNO 3 solution, heated to...

Embodiment 3

[0044] The PDI-loaded biochar photocatalyst of this embodiment is a persulfate system activated by the PDI-loaded biochar photocatalyst under visible light, and the mass ratio of the PDI-loaded biochar photocatalyst to the persulfate is 25:53.7.

[0045] The preparation method of the PDI loaded biochar photocatalyst of the present embodiment comprises the steps:

[0046] (1) Put perylene-3,4,9,10-tetracarboxylic dianhydride, β-alanine and imidazole at a mass ratio of 1:1.8:15 in a four-necked flask under a nitrogen atmosphere at a temperature of 105°C Organic synthesis, adding ethanol and HCl at a mass ratio of 155:18 and stirring to obtain a stirred product;

[0047] (2) Filtrating, washing to neutrality and drying the stirred product to obtain PDI powder, wherein the filter membrane pore size is 0.22 μm, and the drying temperature is 70° C.;

[0048] (3) Prepare 50mL of PDI stock solution, add triethylamine, stir for 30min, add BC and then add 7mL HNO 3 solution, heated to...

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Abstract

The invention discloses a PDI-loaded biochar photocatalyst and a preparation method and a use method thereof. The photocatalyst is prepared from the following raw material components: PDI, charcoal and acid in a mass ratio of 1 to 45: 1: 3000 to 7000. According to the invention, perylene-3, 4, 9, 10-tetracarboxylic dianhydride, beta alanine, imidazole and biochar are used as raw materials, an organic synthesis method is adopted to obtain PDI, the photocatalyst is obtained through synchronous acidification, and the application method of the photocatalyst is provided, so that the PDI-loaded biochar photocatalyst prepared by the invention is simple in preparation process and high in yield, and has good application prospects under the condition of not introducing metal elements. A system can perform efficient catalytic degradation on iohexol in water.

Description

technical field [0001] The invention relates to a biochar-loaded photocatalyst and a preparation method and a use method thereof, in particular to a PDI-loaded biochar photocatalyst and a preparation method and a use method thereof. Background technique [0002] PDI is an n-type organic semiconductor that can absorb visible light due to its narrow bandgap (~1.69eV). PDI can form ordered π-π stacking and hydrogen bonding structures through molecular self-assembly. Self-assembled PDI has better photocatalytic activity than bulk PDI due to its shorter electron transport channel and red-shifted absorption sideband, but its photocatalytic ability is limited due to its easy recombination of electrons and holes. Most of the inventions about PDI are about constructing heterojunction photocatalysts, preventing the recombination of electrons and holes to improve photocatalytic performance. However, due to the inherent positions of valence and conduction bands of PDI, its composites ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/04B01J31/02C02F1/30C02F101/38
CPCB01J31/0271B01J31/04B01J31/0244B01J31/069C02F1/30C02F2101/38C02F2305/10C02F2103/003B01J35/39
Inventor 何欢季秋忆张利民孙敦宇武怡洁徐哲杨绍贵李时银
Owner NANJING NORMAL UNIVERSITY
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