Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 1, Pages 580-590Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b16704
Keywords
carbon quantum dots (CQDs); dopamine; interlayer; nanofiltration membranes; photocatalytic self-cleaning
Funding
- National Natural Science Foundation of China [21878146]
- Jiangsu Provincial Department of Human Resources and Social Security [JNHB-040]
- Jiangsu Provincial Natural Science Fund Outstanding Youth Project [BK20190037]
- program of Thousand Talents Plan -Distinguished Young Professor
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Performance declination of nanofiltration (NF) membranes caused by concentration polarization (CP) and membrane fouling has severely restricted their practical application in many fields. This work reports the construction of a novel interlayer between the substrate and the selective layer of conventional composite membranes by coordinating regulation of carbon quantum dots (CQDs) and polydopamine (PDA). Unlike traditional methods that treat CP and fouling separately, the new strategy grants the membrane with dual functions at one time. First, the insertion of the PDA-CQDs layer reformulates the interfacial polymerization process that reduces the solute transport resistance and mitigates the CP issue. Second, the sandwiched photoactive CQDs can degrade organic molecules adsorbed on the membrane surface under visible light, which is promising for low-cost fouling remediation. This study may offer valuable insights into the preparation of durable self-cleaning NF membranes for the effective treatment of complex wastewater in various industries.
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