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Graphite-phase carbon nitride photocatalyst for sewage treatment as well as preparation method and application thereof

A graphite phase carbon nitride, phase carbon nitride light technology, applied in catalyst activation/preparation, physical/chemical process catalyst, light water/sewage treatment, etc., can solve problems such as low yield, achieve high yield, Good performance, easy to repeat the effect of the operation

Pending Publication Date: 2021-11-23
中化学朗正环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above hydrothermal treatment is usually carried out in the sealed tetrafluoroethylene lining, the hydrothermal temperature is usually 100-190°C, the treatment time is usually 6-8h, and there is hydrothermal g-C 3 N 4 Defects with lower yield

Method used

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  • Graphite-phase carbon nitride photocatalyst for sewage treatment as well as preparation method and application thereof
  • Graphite-phase carbon nitride photocatalyst for sewage treatment as well as preparation method and application thereof
  • Graphite-phase carbon nitride photocatalyst for sewage treatment as well as preparation method and application thereof

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preparation example Construction

[0025] The invention discloses a method for preparing a graphite-phase carbon nitride photocatalyst for sewage treatment, comprising: performing a temperature-programmed hydrothermal reaction on a system dispersed with graphite-phase carbon nitride in a closed environment to obtain a graphite-phase carbon nitride photocatalyst .

[0026] Specifically, the temperature-programmed hydrothermal reaction includes: raising the temperature to 200°C-250°C within ≤30min, and keeping it for 10min-40min; It can be 200°C, 210°C, 220°C or 250°C, and the holding time can be 10min, 20min, 30min or 40min; the graphite phase carbon nitride is treated higher than its decomposition temperature by rapid heating and hydrothermal treatment, so that the graphite phase nitrogen Carbon nitride can be modified without decomposing, endowing the modified graphite phase carbon nitride with good photocatalytic activity.

[0027] Preferably, the mass volume ratio of the graphite phase carbon nitride to the...

Embodiment 1

[0033] This embodiment provides a method for preparing a graphite-phase carbon nitride photocatalyst for sewage treatment, including:

[0034] Step 1. Disperse 500mg of graphitic carbon nitride (CN) in 5mL of pure water to obtain a dispersion system;

[0035] Step 2, placing the dispersion system described in step 1 in a hydrothermal reactor and sealing it;

[0036] Step 3. Introduce argon gas into the hydrothermal reactor described in step 2 to remove the air, then raise the temperature to 200° C. in 25 minutes, and keep it for 20 minutes; rise to 200°C;

[0037] Step 4. Keep the system in step 3 with water cooling, centrifuge, wash, and dry to obtain the graphite phase carbon nitride photocatalyst CN-200-20; in CN-T-t, T represents the hydrothermal treatment temperature °C, and t represents after reaching the target temperature The retention time min.

Embodiment 2

[0039] This embodiment is the same as Embodiment 1, except that the retention time is 10 min.

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Abstract

The invention discloses a graphite-phase carbon nitride photocatalyst for sewage treatment as well as a preparation method and application thereof. The preparation method of the graphite-phase carbon nitride photocatalyst for sewage treatment comprises the following step: carrying out a temperature-programmed hydrothermal reaction on a system dispersed with graphite-phase carbon nitride in a closed environment to obtain the graphite-phase carbon nitride photocatalyst. According to the invention, the graphite-phase carbon nitride is modified based on the temperature-programmed hydrothermal reaction in the closed environment, and yield is 80% or above; the photocatalytic degradation activity test result of the photocatalyst shows that the activity is improved by 4 times compared with the activity before modification, and the advantages of high yield and good performance of the graphite-phase carbon nitride photocatalyst are obtained.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a graphite-phase carbon nitride photocatalyst for sewage treatment and a preparation method and application thereof. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is a photocatalyst with visible light photocatalytic reactivity, which has the advantages of good thermal / chemical stability, non-toxicity and pollution-free, etc. Research extensively. in g-C 3 N 4 In the application of removing organic pollutants, since the pure g-C 3 N 4 Small specific surface area, low utilization efficiency of visible light, low electrical conductivity, fast recombination efficiency of photogenerated carriers, few interface (light) reaction active sites, slow surface reaction kinetics, medium oxidation ability, and low catalytic activity. Therefore, it is necessary to pass the g-C 3 N 4 Targeted modification was carried out to enhance its phot...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/10C02F1/30C02F101/34C02F101/38
CPCB01J27/24B01J37/10C02F1/30C02F2305/10C02F2101/34C02F2101/38B01J35/39
Inventor 朱龙海杨国祥于再基
Owner 中化学朗正环保科技有限公司
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