Antibacterial properties of photochemically prepared AgTiO2 membranes
Biofouling reduces the membrane performance and has become a problem in many applications. One of the strategies to reduce biofouling is to apply antibacterial materials to the membrane surface, which prevents the attachment and growth of microorganisms. In this study, the surface of flat ceramic su...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-01-01
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| Series: | Water Science and Technology |
| Subjects: | |
| Online Access: | http://wst.iwaponline.com/content/87/2/381 |
| _version_ | 1797903708312305664 |
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| author | Azzah Nazihah Che Abdul Rahim Hisashi Hoshida Sergio Mestre Izumi Kumakiri |
| author_facet | Azzah Nazihah Che Abdul Rahim Hisashi Hoshida Sergio Mestre Izumi Kumakiri |
| author_sort | Azzah Nazihah Che Abdul Rahim |
| collection | DOAJ |
| description | Biofouling reduces the membrane performance and has become a problem in many applications. One of the strategies to reduce biofouling is to apply antibacterial materials to the membrane surface, which prevents the attachment and growth of microorganisms. In this study, the surface of flat ceramic supports was covered with TiO2 powder, and silver was applied by photoreduction using a CH3COOAg solution at room temperature. After the photoreduction, AgOx and metallic silver were found on the TiO2 as analyzed by XPS. While a negligible amount of silver was released from the prepared AgTiO2 membranes into water, the dissolution of silver was enhanced in a 0.09 M NaCl solution. The AgTiO2 membranes inhibited the growth of Escherichia coli in dark conditions. The inhibition cannot be explained only by the concentration of silver ions released from the membranes. Microscopic observation showed that direct contact with AgTiO2 kills E. coli. The results showed the possibility of improving the antibacterial activity of membranes by applying an AgTiO2 coating.
HIGHLIGHTS
AgTiO2 membranes were prepared by photoreduction using the CH3COOAg solution.;
Silver oxide was formed by photoreduction with a light intensity of 3.3 mW/cm2.;
Silver leaching from the AgTiO2 membranes was negligible in water but enhanced in 0.09 M NaCl solution.;
AgTiO2 membranes inhibited the growth of E. coli under dark conditions.;
The results showed potential antibacterial activity of silver oxide.; |
| first_indexed | 2024-04-10T09:37:13Z |
| format | Article |
| id | doaj.art-1dacdbea1cb34c479e9354798b618f4e |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-04-10T09:37:13Z |
| publishDate | 2023-01-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-1dacdbea1cb34c479e9354798b618f4e2023-02-17T16:51:18ZengIWA PublishingWater Science and Technology0273-12231996-97322023-01-0187238139210.2166/wst.2023.003003Antibacterial properties of photochemically prepared AgTiO2 membranesAzzah Nazihah Che Abdul Rahim0Hisashi Hoshida1Sergio Mestre2Izumi Kumakiri3 Graduate School of Sciences and Technology for Innovation, Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, 755-8611, Japan Graduate School of Sciences and Technology for Innovation, Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, 755-8611, Japan University Institute of Ceramic Technology/Chemical Engineering Department, Universitat Jaume I, Avda. Vicent Sos Baynat, 12071, Castellón, Spain Graduate School of Sciences and Technology for Innovation, Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, 755-8611, Japan Biofouling reduces the membrane performance and has become a problem in many applications. One of the strategies to reduce biofouling is to apply antibacterial materials to the membrane surface, which prevents the attachment and growth of microorganisms. In this study, the surface of flat ceramic supports was covered with TiO2 powder, and silver was applied by photoreduction using a CH3COOAg solution at room temperature. After the photoreduction, AgOx and metallic silver were found on the TiO2 as analyzed by XPS. While a negligible amount of silver was released from the prepared AgTiO2 membranes into water, the dissolution of silver was enhanced in a 0.09 M NaCl solution. The AgTiO2 membranes inhibited the growth of Escherichia coli in dark conditions. The inhibition cannot be explained only by the concentration of silver ions released from the membranes. Microscopic observation showed that direct contact with AgTiO2 kills E. coli. The results showed the possibility of improving the antibacterial activity of membranes by applying an AgTiO2 coating. HIGHLIGHTS AgTiO2 membranes were prepared by photoreduction using the CH3COOAg solution.; Silver oxide was formed by photoreduction with a light intensity of 3.3 mW/cm2.; Silver leaching from the AgTiO2 membranes was negligible in water but enhanced in 0.09 M NaCl solution.; AgTiO2 membranes inhibited the growth of E. coli under dark conditions.; The results showed potential antibacterial activity of silver oxide.;http://wst.iwaponline.com/content/87/2/381agtio2antibacterial activityescherichia coliimmobilizationphotoreduction |
| spellingShingle | Azzah Nazihah Che Abdul Rahim Hisashi Hoshida Sergio Mestre Izumi Kumakiri Antibacterial properties of photochemically prepared AgTiO2 membranes Water Science and Technology agtio2 antibacterial activity escherichia coli immobilization photoreduction |
| title | Antibacterial properties of photochemically prepared AgTiO2 membranes |
| title_full | Antibacterial properties of photochemically prepared AgTiO2 membranes |
| title_fullStr | Antibacterial properties of photochemically prepared AgTiO2 membranes |
| title_full_unstemmed | Antibacterial properties of photochemically prepared AgTiO2 membranes |
| title_short | Antibacterial properties of photochemically prepared AgTiO2 membranes |
| title_sort | antibacterial properties of photochemically prepared agtio2 membranes |
| topic | agtio2 antibacterial activity escherichia coli immobilization photoreduction |
| url | http://wst.iwaponline.com/content/87/2/381 |
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