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Preparation method and application of a photocatalytic sewage treatment membrane

A technology for sewage treatment and photocatalysis, which is applied in the fields of illumination water/sewage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc. It can solve the problem that the catalytic activity cannot meet the large-scale application and achieve excellent Effects of membrane flux, accelerated transfer, and improved electrical conductivity

Active Publication Date: 2022-05-10
HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, photogenerated charges are easy to recombine, making g-C 3 N 4 The catalytic activity cannot meet the needs of large-scale applications

Method used

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  • Preparation method and application of a photocatalytic sewage treatment membrane
  • Preparation method and application of a photocatalytic sewage treatment membrane
  • Preparation method and application of a photocatalytic sewage treatment membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of photocatalytic materials:

[0030] Weigh 500mg of g-C 3 N 4 Add to a 250mL beaker containing 100mL deionized water to form a suspension and ultrasonically disperse for 30min; add dopamine hydrochloride (dopamine hydrochloride and g-C 3 N 4 The mass ratio of dopamine hydrochloride to 8-mercaptoguanosine is 1:11.5), and magnetically stirred at room temperature for 60min to make it evenly mixed; The solid-to-liquid ratio of 8-mercaptoguanosine to Tris-HCl buffer solution was 1 g:2.5 mL), and the pH was adjusted to 8.5 with 1 M NaOH solution, and the reaction was performed under magnetic stirring at 60° C. for 24 h. The reacted suspended sample was cooled to room temperature, centrifuged for 10 min (4000 r / min) in a centrifuge, and then the solid sample was collected and washed with deionized water for 3 times, and baked at 60° C. for 12 h to obtain the photocatalytic material.

[0031] Preparation of a photocatalytic sewage treatment membrane:

[0032] ...

Embodiment 2

[0034] The difference between the preparation of photocatalytic material and embodiment 1 is: dopamine hydrochloride and g-C 3 N 4 The mass ratio of dopamine hydrochloride to 8-mercaptoguanosine is 1:1; the solid-liquid ratio of 8-mercaptoguanosine to Tris-HCl buffer solution is 1g:2mL; g-C 3 N 4 The concentration of the suspension was 4.5 mg / mL.

[0035] The preparation of a photocatalytic sewage treatment membrane is the same as in Example 1.

Embodiment 3

[0037] The difference between the preparation of photocatalytic material and embodiment 1 is: dopamine hydrochloride and g-C 3 N 4 The mass ratio of dopamine hydrochloride to 8-mercaptoguanosine is 1:1.4; the solid-liquid ratio of 8-mercaptoguanosine to Tris-HCl buffer solution is 1g:3mL; g-C 3 N 4 The concentration of the suspension was 5.4 mg / mL.

[0038] The preparation of a photocatalytic sewage treatment membrane is the same as in Example 1.

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PUM

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Abstract

The invention discloses a preparation method and application of a photocatalytic sewage treatment film, and relates to the technical field of sewage treatment. The preparation method of the photocatalytic sewage treatment membrane comprises, by means of decompression suction filtration, modifying g-C with 8-mercaptoguanosine-polydopamine 3 N 4 and / or 5‑mercaptomethyluracil‑polydopamine modified g‑C 3 N 4 Suction filter onto cellulose acetate membrane. The photocatalytic sewage treatment membrane prepared by the present invention has excellent membrane flux, improves the interception of organic pollutants, enhances the degradation of organic pollutants under the condition of visible light, effectively prevents membrane fouling, and improves membrane flux , Enhance membrane separation performance, especially in oil-water separation, it has excellent separation effect, and has great application prospects in water purification treatment.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a preparation method and application of a photocatalytic sewage treatment membrane. Background technique [0002] With the development of industrialization in the world, water pollution is becoming more and more serious, and the pollutants in water are also showing a trend of diversification. Common pollutants include toxic heavy metals, natural toxins, drugs, organic pollutants, etc. Common purification technologies include chlorine gas, ozone and ultraviolet disinfection, filtration, adsorption, standing, etc., but these methods are often not very effective for new pollutants and may cause secondary pollution. In recent years, due to the pollution-free and safe characteristics of photocatalytic technology, the use of photocatalytic technology to treat and degrade pollutants has become a research hotspot in the field of environment. [0003] The combined pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/02B01D67/00B01J31/06B01J35/06C02F1/30C02F1/44C02F1/40C01B3/04
CPCB01D69/02B01D67/0079B01J31/069C01B3/042C02F1/30C02F1/44C02F1/40C02F2101/30C02F2101/308C01B2203/0277C01B2203/1041B01J35/39B01J35/59Y02E60/36
Inventor 徐坚麟付源洪宗虎艾亮建
Owner HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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