Preparation method of polypyrrole graphite-phase carbon nitride composite material for treating uranium-containing wastewater through photocatalytic reduction and application thereof

A technology of graphite phase carbon nitride and composite materials, which is applied in the fields of reduced water/sewage treatment, chemical instruments and methods, light water/sewage treatment, etc., can solve the problem of small specific surface area, high electron-hole recombination rate and low light response Application range and other issues, to achieve good photocatalytic performance, avoid cumbersome processing, and mild reaction conditions

Inactive Publication Date: 2020-04-17
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure graphitic carbonitride has shortcomings such as small specific surface area, high electron-hole recombination rate and low photoresponse, which limit its application range.

Method used

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  • Preparation method of polypyrrole graphite-phase carbon nitride composite material for treating uranium-containing wastewater through photocatalytic reduction and application thereof
  • Preparation method of polypyrrole graphite-phase carbon nitride composite material for treating uranium-containing wastewater through photocatalytic reduction and application thereof
  • Preparation method of polypyrrole graphite-phase carbon nitride composite material for treating uranium-containing wastewater through photocatalytic reduction and application thereof

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Effect test

Embodiment 1

[0026] Embodiment 1, the preparation method of polypyrrole graphite phase carbon nitride composite material for photocatalytic reduction treatment of uranium-containing wastewater, comprising the following steps:

[0027] A. Weigh 20g of melamine, place it in a muffle furnace, and evenly raise it to 500°C at 2°C / min. After calcination for 4 hours, take out the yellow solid in the crucible to obtain graphite phase carbon nitride.

[0028] B, take by weighing sodium dodecylbenzenesulfonate and graphite phase carbon nitride according to the mass ratio of 1:18 and put it into the reactor, then add deionized water, place it in an ultrasonic oscillator and vibrate for 30min to obtain the first A mixed solution; wherein the mass ratio of sodium dodecylbenzenesulfonate to deionized water is 1g: 45ml.

[0029] C. Stir the first mixed solution in an environment of 0°C, and add pyrrole while stirring to obtain the second mixed solution, in which the mass of pyrrole and graphite phase car...

Embodiment 2

[0032] Embodiment 2, the preparation method of polypyrrole graphite phase carbon nitride composite material for photocatalytic reduction treatment of uranium-containing wastewater, comprising the following steps:

[0033] A. Weigh 23g of melamine, place it in a muffle furnace, and evenly raise it to 530°C at 3°C / min, and take out the yellow solid in the crucible after calcining for 3.5 hours to obtain graphite phase carbon nitride.

[0034] B, take by weighing sodium dodecylbenzenesulfonate and graphite phase carbon nitride according to the mass ratio of 1:19 and put it into the reactor, then add deionized water, place it in an ultrasonic oscillator and vibrate for 40min to obtain the first A mixed solution; wherein the mass ratio of sodium dodecylbenzenesulfonate to deionized water is 1g:48ml.

[0035] C. Stir the first mixed solution in an environment of 0°C, and add pyrrole while stirring to obtain the second mixed solution, in which the mass of pyrrole and graphite phase c...

Embodiment 3

[0038] Embodiment 3, the preparation method of polypyrrole graphite phase carbon nitride composite material for photocatalytic reduction treatment of uranium-containing wastewater, comprising the following steps:

[0039] A. Weigh 25g of melamine, place it in a muffle furnace, and evenly raise it to 550°C at 5°C / min, and take out the yellow solid in the crucible after calcining for 3 hours to obtain graphite phase carbon nitride.

[0040] B, take by weighing sodium dodecylbenzenesulfonate and graphite phase carbon nitride according to the mass ratio of 1:20 and put it into the reactor, then add deionized water, place it in an ultrasonic oscillator and vibrate for 50min to obtain the first A mixed solution; wherein the mass ratio of sodium dodecylbenzenesulfonate to deionized water is 1g: 50ml.

[0041] C. Stir the first mixed solution in an environment of 0°C, and add pyrrole while stirring to obtain the second mixed solution, in which the mass of pyrrole and graphite phase ca...

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Abstract

The invention discloses a preparation method of a polypyrrole graphite-phase carbon nitride composite material for treating uranium-containing wastewater through photocatalytic reduction and an application thereof. The preparation method comprises the following steps: calcining melamine to obtain graphite phase carbon nitride, mixing and oscillating the graphite phase carbon nitride and sodium dodecyl benzene sulfonate, adding pyrrole with different mass ratios, filtering, washing with water, and drying to obtain the polypyrrole=graphite phase carbon nitride composite material; adjusting the pH value of the uranium-containing wastewater to 4-7, adding the composite material as a uranium removal agent into the uranium-containing wastewater, placing the uranium-containing wastewater in a dark box environment, introducing nitrogen, stirring, irradiating the stirred solid-liquid mixture with a xenon lamp, filtering the irradiated hexavalent uranium-containing wastewater, taking the filtered clear liquid, and calculating the removal rate of uranium in the uranium-containing wastewater. The polypyrrole-graphite-phase carbon nitride composite material prepared by the method is good in catalytic activity in a visible light region, low in cost, simple to operate, relatively high in uranium-containing wastewater removal rate, remarkable in adsorption effect and relatively good in economic benefit.

Description

technical field [0001] The invention relates to the technical field of uranium-containing wastewater treatment, in particular to a preparation method and application of a polypyrrole graphite phase carbon nitride composite material for photocatalytic reduction treatment of uranium-containing wastewater. Background technique [0002] With the rapid development of my country's nuclear technology and atomic energy industry, uranium mining, nuclear power generation and other processes produce a large amount of uranium-containing nuclear waste. Uranium is a toxic and radioactive metal, and a large amount of U(Ⅵ)-containing waste enters the water environment. Among them, uranium-containing wastewater poses an increasingly serious threat to the natural environment and human health. The existing treatment methods mainly include adsorption method, membrane separation method, chemical precipitation method, biological flocculation method and so on. Although these methods have a certain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/70B01J31/06B01J35/10
CPCB01J31/069B01J35/004B01J35/1004C02F1/30C02F1/70C02F2101/006
Inventor 刘金香俞坤葛玉杰何志强吴娇刘迎九
Owner NANHUA UNIV
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