Preparation method for lignin reduced gold nanoparticle modified carbon nitride for efficiently treating organic pollution

A nano-gold particle, organic pollution technology, applied in the field of materials, can solve the problems of catalytic efficiency limitation, low carrier transport efficiency hindrance, poor electrical conductivity, etc. Effect

Active Publication Date: 2017-10-10
NANTONG TEXTILE & SILK IND TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low carrier transport efficiency due to its fast electron-hole recombination efficiency and poor electrical conductivity hinders its catalytic efficiency and limits its large-scale application.

Method used

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  • Preparation method for lignin reduced gold nanoparticle modified carbon nitride for efficiently treating organic pollution
  • Preparation method for lignin reduced gold nanoparticle modified carbon nitride for efficiently treating organic pollution
  • Preparation method for lignin reduced gold nanoparticle modified carbon nitride for efficiently treating organic pollution

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preparation example Construction

[0033] The invention provides a method for preparing carbon nitride modified by lignin-reduced nano-gold particles for efficient treatment of organic pollution, comprising the following steps:

[0034] (1) Carbon nitride semiconductors are prepared by high-temperature calcination in a muffle furnace, and carbon nitride powders with better catalytic performance are prepared by controlling the type of precursor, heating rate, calcination temperature, calcination time, and annealing method;

[0035] (2) By mixing a certain amount of lignin with calcined carbon nitride powder and adding chloroaurate, under the condition of heating in a water bath, control the pH of the solution, the heating temperature and time, and obtain it by X-ray energy spectrometer Optimal carbon nitride deposited by precious metal nanogold;

[0036] (3) The carbon nitride composite material deposited by the noble metal was centrifuged at high speed, dried under vacuum conditions, and placed in a muffle furn...

Embodiment 1

[0056] This implementation case demonstrates a method for preparing carbon nitride modified by lignin reduction nano-gold particles for efficient treatment of organic pollution according to the following steps:

[0057] Step 1: Preparation of high temperature calcined carbon nitride powder

[0058] In one embodiment, this step can be specifically performed as follows: Weigh 10 mg of urea into a 15 ml alumina crucible, heat up at 2°C / min, calcinate at 550°C for 2 hours, and anneal at 3-5°C to treat the powder.

[0059] Step 2: Reduction of gold nanoparticles by heating in a water bath

[0060] In one embodiment, this step can be specifically performed as follows: Weigh 100 mg of lignin and mix it with 500 mg of carbon nitride powder, prepare 50 ml of 20 mM hydrochloric acid solution and add chloroaurate (2 mM), under the action of magnetic stirring, Heat in a water bath at 80°C for 12h, centrifuge at 4000r / min for 15min, and vacuum dry at 60°C for 12h.

[0061] Step 3: Second...

Embodiment 2

[0065] This implementation case demonstrates a method for preparing carbon nitride modified by lignin reduction nano-gold particles for efficient treatment of organic pollution according to the following steps:

[0066] Step 1: Preparation of high temperature calcined carbon nitride powder

[0067] In one embodiment, this step can be specifically performed as follows: Weigh 10 mg of urea into a 15 ml alumina crucible, heat up at 2°C / min, calcinate at 550°C for 2 hours, and anneal at 3-5°C to treat the powder.

[0068] Step 2: Reduction of gold nanoparticles by heating in a water bath

[0069] In one embodiment, this step can be specifically performed as follows: Weigh 200 mg of lignin and mix it with 1 g of carbon nitride powder, prepare 50 ml of 20 mM hydrochloric acid solution and add chloroaurate (4 mM), under the action of magnetic stirring, Heat in a water bath at 80°C for 12h, centrifuge at 4000r / min for 15min, and vacuum dry at 60°C for 12h.

[0070] Step 3: Secondary...

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Abstract

The invention discloses a preparation method for lignin reduced gold nanoparticle modified carbon nitride for efficiently treating organic pollution. The method comprises the following steps: firstly, utilizing a precursor to prepare semiconductor carbon nitride powder by calcining at high temperature in a muffle furnace; preparing lignin at a certain ratio and mixing with the carbon nitride powder under an acidic condition; adding noble metal salt and reacting for a period of time under a water bath condition; performing centrifugal vacuum drying treatment; and finally, placing the dried powder into the muffle furnace and calcining for the second time. The method has the advantages of simple process, low energy cost and raw material cost and outstanding effect of treating the organic pollution.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing carbon nitride modified by lignin reduction nano-gold particles for efficient treatment of organic pollution. Background technique [0002] As a hot material, semiconductor carbon nitride (C3N4) has been deeply studied in the scientific community and is widely used in various fields: such as the use of photocatalysis to purify air, water and other substances, cell imaging, detection of biomolecules, gas phase detection, biological Medical applications, among others, have played a very prominent role. Graphite carbon nitride is a class of two-dimensional polymeric materials composed of carbon atoms and single atoms. In addition to having the same surface effect, low size effect, quantum size effect and macroscopic quantum tunneling effect as ordinary nanomaterials, it also has other special properties. nature. Such as: photoluminescence, electrochemilumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J20/02B01J20/30C02F1/28C02F101/30
Inventor 赖跃坤董佳宁黄剑莹
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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