Preparation method for electron beam irradiation modified graphite-like-phase carbon nitride for visible-light-driven photocatalyst

A technology of graphite phase carbon nitride and electron beam irradiation, which is applied in chemical instruments and methods, physical/chemical process catalysts, light water/sewage treatment, etc., can solve the problem of low direct photocatalytic efficiency and achieve effective promotion Separation, easy operation, enhanced absorption effect

Active Publication Date: 2015-12-16
上海峤岳环境科技合伙企业(有限合伙)
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Problems solved by technology

[0003] However, pure graphite-like carbon nitride has a relatively high recombination probability of photogenerated electron-hole pairs, so the direct photocatalytic efficiency is not too high.

Method used

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  • Preparation method for electron beam irradiation modified graphite-like-phase carbon nitride for visible-light-driven photocatalyst
  • Preparation method for electron beam irradiation modified graphite-like-phase carbon nitride for visible-light-driven photocatalyst
  • Preparation method for electron beam irradiation modified graphite-like-phase carbon nitride for visible-light-driven photocatalyst

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Embodiment

[0018] The process and steps of this embodiment are as follows:

[0019] a. First prepare graphite-like carbon nitride according to existing known technology: get 4.0g urea and add a 25mL crucible with a cover, and put it into a muffle furnace, dry at 80°C for 24 hours, and then heat up to 550°C °C thermal polymerization for 3 hours, then naturally cooled to room temperature. The resulting yellow solid was washed several times with water and dilute nitric acid solution, and finally dried at 60 °C overnight.

[0020] b. Mix 60 mg of the graphite-like carbon nitride synthesized above, 30 g of water, 3 g of isopropanol and 60 mg of concentrated ammonia water and seal them in a polyethylene bag. The bag is placed under an electron accelerator for room temperature irradiation treatment. The irradiation dose was set at 800kGy.

[0021] c. After conventional centrifugation, washing and drying of the suspension after irradiation in the previous step, the graphite-like carbon nitrid...

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Abstract

The invention relates to a method for modifying graphite-like-phase carbon nitride by irradiation of electron beams. The method comprises the following steps: firstly preparing graphite-like-phase carbon nitride by adopting a known technical method in the prior art; preparing a suspension liquid by adopting the graphite-like-phase carbon nitride, alcohol, alkali and water according to a certain ratio; putting the suspension liquid in an electron beam generation device; performing electron beam irradiation with certain amount on the suspension liquid, wherein the irradiation amount is 200-1200kGy; and performing centrifugal separation to obtain a solid, washing and drying so as to obtain the electron beam irradiation modified graphite-like-phase carbon nitride. The modified material, namely the electron beam irradiation modified graphite-like-phase carbon nitride, has the excellent visible-light photocatalytic activity, and can be used for effectively solving problems of environment pollution and the like; simultaneously other dopants are not used in modifying, the method is simple, the operation is convenient, and the large-scale production is facilitated.

Description

technical field [0001] The invention relates to a method for modifying graphite-like carbon nitride, in particular to a method for modifying graphite-like carbon nitride by electron beam irradiation. Background technique [0002] Recently, a metal-free photocatalyst, graphitic carbon nitride, has attracted much attention. Due to its suitable bandgap width, high specific surface area and excellent chemical stability, scholars have tried to use it in many fields such as solar light energy conversion, photosynthesis, electrocatalysis and biological imaging. Photocatalytic technology is an environmentally friendly catalytic technology, which has the characteristics of clean energy utilization, low energy consumption, mild reaction conditions, no secondary pollution, and easy operation. It is currently a research hotspot in the field of environmental governance and energy regeneration. [0003] However, pure graphite-like carbon nitride has a relatively high recombination probab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/38
Inventor 焦正张云龙程伶俐浦娴娟丁国际
Owner 上海峤岳环境科技合伙企业(有限合伙)
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