PVDF ultrafiltration membrane modified with visible light photocatalyst and preparation method and application thereof

A photocatalyst and nano-photocatalyst technology, applied in the field of PVDF ultrafiltration membrane and its preparation, achieves the effects of remarkable photocatalytic performance, avoiding photocorrosion and promoting visible light responsiveness
CN110787645AActive Publication Date: 2020-02-14TONGJI UNIV
2 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2020-02-14

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a PVDF ultrafiltration membrane modified with a visible light photocatalyst and a preparation method and application thereof. The ultrafiltration membrane is a PVDF ultrafiltration membrane modified by a CdS / g-C3N4 / rGO nano photocatalyst. In the ultrafiltration membrane, PVDF is used as a matrix, the CdS / g-C3N4 / rGO nano photocatalyst is used as an active component, and theactive component is uniformly distributed in the matrix. The ultrafiltration membrane is prepared from the following components by weight: 17 to 19 parts of polyvinylidene fluoride, 2.5 to 3.5 partsof polyvinylpyrrolidone, 77 to 79 parts of N,N-dimethylacetamide, and 0.3 to 1.3 parts of the CdS / g-C3N4 / rGO nano photocatalyst. The modified PVDF ultrafiltration membrane is applied to resisting membrane organic pollutants or resisting bacteria. Compared with the prior art, the modified membrane provided by the invention is high in hydrophilicity and good in photocatalytic activity, membrane poreblocking caused by organic pollutants can be effectively reduced under visible light irradiation, the good killing effect is provided for Gram-negative bacteria represented by Escherichia coli and Gram-positive bacteria represented by Staphylococcus aureus, the formation of biological film on the membrane surface can be significantly inhibited, and the good synchronous anti-pollution and antibacterial effects are provided.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of membrane separation in water treatment, and relates to a CdS / g-C 3 N 4 / rGO visible light photocatalyst modified PVDF ultrafiltration membrane and its preparation method and application. Background technique

[0002] Membrane separation technology is one of the preferred technologies in the field of water pollution control engineering. Due to its low cost, good effluent quality, high degree of intensification, simple equipment, and convenient operation, it is widely used in drinking water purification and sewage, wastewater treatment and reuse. middle. However, membrane fouling, especially membrane biofouling, often leads to the attenuation of membrane flux, the increase of operating costs and the shortening of membrane service life, which has become the main obstacle to the wide application of membrane separation technology in drinking water and sewage and wastewater treatment.

[0003] Polyvinylidene...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More