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- Publisher Website: 10.1021/acs.est.6b01867
- Scopus: eid_2-s2.0-84985918630
- PMID: 27479138
- WOS: WOS:000382805800070
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Article: In situ reduction of silver by polydopamine: A novel antimicrobial modification of a thin-film composite polyamide membrane
Title | In situ reduction of silver by polydopamine: A novel antimicrobial modification of a thin-film composite polyamide membrane |
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Authors | |
Issue Date | 2016 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag |
Citation | Environmental Science & Technology, 2016, v. 50 n. 17, p. 9543-9550 How to Cite? |
Abstract | We report a facile method for the antimicrobial modification of a thin-film composite polyamide reverse osmosis (RO) membrane. The membrane surface was first coated with polydopamine (PDA), whose reducing catechol groups subsequently immobilized silver ions in situ to form uniformly dispersed silver nanoparticles (AgNPs) inside the coating layer. Agglomeration of AgNPs was not observed despite a high silver loading of 13.3 ± 0.3 μg/cm2 (corresponding to a surface coverage of 18.5% by the nanoparticles). Both diffusion inhibition zone tests and colony formation unit tests showed clear antimicrobial effects of the silver loaded membranes on model bacteria Bacillus subtilis and Escherichia coli. Furthermore, the silver immobilized membrane had significantly enhanced salt rejection compared to the control PDA coated membrane, which is attributed to the preferential formation of AgNPs at defect sides within the PDA layer. This self-healing mechanism can be used to prepare antimicrobial RO membranes with improved salt rejection without scarifying the membrane permeability, which provides a new dimension for membrane surface modification. |
Persistent Identifier | http://hdl.handle.net/10722/247301 |
ISSN | 2023 Impact Factor: 10.8 2023 SCImago Journal Rankings: 3.516 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Yang, Z | - |
dc.contributor.author | Wu, Y | - |
dc.contributor.author | Wang, J | - |
dc.contributor.author | Cao, B | - |
dc.contributor.author | Tang, C | - |
dc.date.accessioned | 2017-10-18T08:25:14Z | - |
dc.date.available | 2017-10-18T08:25:14Z | - |
dc.date.issued | 2016 | - |
dc.identifier.citation | Environmental Science & Technology, 2016, v. 50 n. 17, p. 9543-9550 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.uri | http://hdl.handle.net/10722/247301 | - |
dc.description.abstract | We report a facile method for the antimicrobial modification of a thin-film composite polyamide reverse osmosis (RO) membrane. The membrane surface was first coated with polydopamine (PDA), whose reducing catechol groups subsequently immobilized silver ions in situ to form uniformly dispersed silver nanoparticles (AgNPs) inside the coating layer. Agglomeration of AgNPs was not observed despite a high silver loading of 13.3 ± 0.3 μg/cm2 (corresponding to a surface coverage of 18.5% by the nanoparticles). Both diffusion inhibition zone tests and colony formation unit tests showed clear antimicrobial effects of the silver loaded membranes on model bacteria Bacillus subtilis and Escherichia coli. Furthermore, the silver immobilized membrane had significantly enhanced salt rejection compared to the control PDA coated membrane, which is attributed to the preferential formation of AgNPs at defect sides within the PDA layer. This self-healing mechanism can be used to prepare antimicrobial RO membranes with improved salt rejection without scarifying the membrane permeability, which provides a new dimension for membrane surface modification. | - |
dc.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag | - |
dc.relation.ispartof | Environmental Science & Technology | - |
dc.title | In situ reduction of silver by polydopamine: A novel antimicrobial modification of a thin-film composite polyamide membrane | - |
dc.type | Article | - |
dc.identifier.email | Tang, C: tangc@hku.hk | - |
dc.identifier.authority | Tang, C=rp01765 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acs.est.6b01867 | - |
dc.identifier.pmid | 27479138 | - |
dc.identifier.scopus | eid_2-s2.0-84985918630 | - |
dc.identifier.hkuros | 281274 | - |
dc.identifier.volume | 50 | - |
dc.identifier.issue | 17 | - |
dc.identifier.spage | 9543 | - |
dc.identifier.epage | 9550 | - |
dc.identifier.isi | WOS:000382805800070 | - |
dc.identifier.issnl | 0013-936X | - |