Preparation and properties of water-soluble carbon nitride modified PVDF composite membrane |
Authors: Wang Huiya |
Units: School of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China |
KeyWords: water-soluble; graphitic carbon nitride; PVDF; anti-pollution; photocatalysis |
ClassificationCode:X-1 |
year,volume(issue):pagination: 2022,42(3):41-50 |
Abstract: |
In this study,the photocatalytic water-soluble graphite carbon nitride was synthesized by molten salt method in one step,and dispersed in a certain proportion to the casting solution to obtain K,Na-PHI/PVDF composite membrane.The characteristice of the modified membrane were determined using XRD、FT-IR、SEM、prosity 、water contact angle and water flux measurements.The results showed that the introduction of K, Na-PHI accelerated the phase separation rate of the casting solution and changed the pore structure and pore size of the composite membrane.The pure water flux of composite membrane increased from 49.76 L.m-2.h-1 to 224.4 L.m-2.h-2 ,the contact angle decreased to 53.9°,the flux recovery rate was 83.725%.the total pollution rate decreased,and the proportion of reversibel pollution increased.The separation of BSA and the degradation of MB on composite membrane were 55.53% and 89.88%.Respectively,the K,Na-PHI/PVDF membrane has excellent photocatalytic properties. The photocatalytic degradation of 10 mg.L-1 MB could be reduced to 0.56 mg.L-1 in 270 min and the repeat photocatalytic degradation rate was maintained at about 74.50%. |
Funds: |
江苏省科技厅“含油污泥无害化深度处理关键技术集成装备研发及产业化”(BA2018004 ) |
AuthorIntro: |
王慧雅(1978-),女,江苏宜兴,副教授,研究生,硕士,研究方向PVDF膜改性及应用 |
Reference: |
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