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A kind of poly-o-phenylenediamine modified agcl/g-c 3 n 4 Composite photocatalyst and its preparation and application

A technology of poly-o-phenylenediamine and o-phenylenediamine, which is applied in the field of poly-o-phenylenediamine modified AgCl/g-C3N4 composite photocatalyst, can solve the problems of high electron-hole recombination rate and slow electron transfer rate, and achieves The effect of increasing the contact area, increasing the photocatalytic efficiency, and being easy to prepare in large quantities

Active Publication Date: 2021-05-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

g-C 3 N 4 As a new type of two-dimensional semiconductor photocatalytic material, due to its excellent physical properties and chemical stability, easy modification, abundant raw material sources and low price, and suitable energy band structure, it can be used in photocatalytic water splitting to produce hydrogen and photocatalytic degradation. The field of organic pollutants has great research and application value, however pure g-C 3 N 4 There is a high electron-hole recombination rate and a slow electron transport rate, so it is necessary to optimize the g-C 3 N 4 modify

Method used

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  • A kind of poly-o-phenylenediamine modified agcl/g-c <sub>3</sub> n <sub>4</sub> Composite photocatalyst and its preparation and application
  • A kind of poly-o-phenylenediamine modified agcl/g-c <sub>3</sub> n <sub>4</sub> Composite photocatalyst and its preparation and application
  • A kind of poly-o-phenylenediamine modified agcl/g-c <sub>3</sub> n <sub>4</sub> Composite photocatalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Lumpy g-C 3 N 4 Preparation: Melamine was calcined in a muffle furnace at a temperature of 600 °C and a rate of 2.5 °C / min for 4 h, and the obtained product was fully ground to obtain a block of g-C 3 N 4 ;Such as figure 1 Visible, g-C 3 N 4 The morphology is blocky and the contact area is small, which is not conducive to photocatalytic degradation;

[0039] (2) Flake g-C 3 N 4 Preparation: The product prepared in step (1) was calcined for the second time in a muffle furnace at a temperature of 500 °C and a rate of 5 °C / min for 2 h, and the obtained product was fully ground, and the concentration of the product was 6 mol / L hydrochloric acid for acidification treatment, per 1 g block g-C 3 N 4 Add 80 mL of hydrochloric acid to obtain flake g-C 3 N 4 .

Embodiment 2

[0041] (1) AgCl / g-C 3 N 4 Preparation of composite photocatalyst: Weigh 6 parts of 1.0g g-C prepared in Example 1 respectively 3 N 4 And dissolved in 30mL of deionized water, after stirring well, add 0.1631g, 0.2040g, 0.2460g, 0.2854g, 0.3261g, 0.4077g solid NaCl respectively, after stirring for 4h, add 14mL, 17mL, 21mL, 24.4mL, 27.9mL, 34.8mL AgNO with a concentration of 1mol / L 3 solution, fully stirred to make the reaction complete, centrifuged, washed and put into an oven for drying to obtain AgCl g-C 3 N 4 The mass percentages are respectively AgCl-10 / g-C 3 N 4 , AgCl-20 / g-C 3 N 4 , AgCl-30 / g-C 3 N 4 , AgCl-35 / g-C 3 N 4 , AgCl-40 / g-C 3 N 4 , AgCl-50 / g-C 3 N 4 AgCl / g-C 3 N 4 Composite photocatalyst; such as figure 2 As shown in the figure, as the amount of AgCl increases, the position of the peak shifts to the right, and there is a peak of AgCl at the corresponding position, which proves that AgCl has been successfully loaded on g-C 3 N 4 superior.

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Embodiment 3

[0044] (1) Flake g-C 3 N 4 Preparation: Melamine was calcined for the first time in a muffle furnace with a temperature of 600°C and a rate of 2.5°C / min for 4 hours, and the obtained product was fully ground, and then heated in a muffle furnace with a temperature of 500°C and a rate of 5°C / min. Calcined for the second time in the Furnace for 2 hours, the obtained product was fully ground, and the product was acidified with hydrochloric acid with a concentration of 6 mol / L to obtain flake g-C 3 N 4 ;

[0045] (2) AgCl / g-C 3 N 4 Preparation of composite photocatalyst: Weigh 1.0g flake g-C 3 N 4 Dissolve in 30mL deionized water, add 0.2040g solid NaCl after stirring well, add 17mL AgNO with a concentration of 1mol / L dropwise after stirring for 4h 3 solution, fully stirred to make the reaction complete, centrifuged, washed and dried in an oven to obtain AgCl / g-C 3 N 4 Composite photocatalyst;

[0046] (3) AgCl / g-C 3 N 4 Preparation of / POPD composite photocatalyst: Wei...

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Abstract

The present invention relates to poly-o-phenylenediamine modified AgCl / g-C 3 N 4 The preparation and application of composite photocatalysts belong to the technical field of environmental material preparation. The present invention adopts template-free method to synthesize flake g-C 3 N 4 The contact area is increased, the transport distance of carriers is shortened, and the photocatalytic efficiency is increased; AgCl is loaded onto g‑C 3 N 4 After that, the forbidden band width is shortened, and the energy required to excite electronic transition in the photocatalytic process is lower; the AgCl / g-C3N4 / POPD composite photocatalyst is obtained by further modification with poly-o-phenylenediamine, which can effectively transfer electrons and improve The separation efficiency of photogenerated electrons and hole pairs; the catalyst degraded antibiotics obtained by the method of the present invention will not cause waste of resources and the formation of additional pollution, and is easy to operate, and is a green and environmentally friendly efficient treatment technology.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, in particular to a poly-o-phenylenediamine modified AgCl / g-C 3 N 4 Composite photocatalyst and its preparation and application. Background technique [0002] Antibiotics are a class of chemicals produced by microorganisms that inhibit or kill other microorganisms at low concentrations. For a long time, antibiotics have been widely used in the treatment of human and animal diseases, and are added to animal feed in sub-therapeutic doses to prevent animal diseases and promote their growth. However, most antibiotics cannot be completely absorbed by the body. About 90% of antibiotics are excreted into the environment in the form of prototype or metabolites through the feces and urine of patients, livestock and poultry, and pollute soil and water through different channels. Tetracycline is a broad-spectrum antibiotic widely used, and there are a lot of residues in water, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C02F1/30C02F1/72C02F103/34
CPCC02F1/30C02F1/725B01J31/06C02F2305/10C02F2305/023C02F2103/343B01J35/39
Inventor 孙林林周亚举李金择刘重阳王会琴马长畅霍鹏伟闫永胜
Owner JIANGSU UNIV