Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method
Preparation of photocatalysts of TiO2 and Ag-TiO2 was carried out by coprecipitation method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), SEM, EDX, and XRF analysis. The disinfection of E. coli, a model indicator organism for the safe water supply, was investigated by u...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/640487 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832545455422046208 |
|---|---|
| author | Robert Liu H. S. Wu Ruth Yeh C. Y. Lee Yungtse Hung |
| author_facet | Robert Liu H. S. Wu Ruth Yeh C. Y. Lee Yungtse Hung |
| author_sort | Robert Liu |
| collection | DOAJ |
| description | Preparation of photocatalysts of TiO2 and Ag-TiO2 was carried out by coprecipitation method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), SEM, EDX, and XRF analysis. The disinfection of E. coli, a model indicator organism for the safe water supply, was investigated by using TiO2 and Ag-TiO2 under different light sources. The treatment efficacy for the inactivation of E. coli would be UV/Ag-TiO2; visible/Ag-TiO2; dark/Ag-TiO2; UV (all 100%) > UV/TiO2 (99%) > visible/TiO2 (96%) > dark/TiO2 (87%) > visible (23%) > dark (19%). The order of disinfection efficiency by their corresponding kinetic initial apparent rate constants, 𝑘app, (min−1) would be UV/Ag-TiO2; visible/Ag-TiO2 (both 6.67) > UV (6.6) > dark/Ag-TiO2 (6.56) > UV/TiO2 (1.62) > visible/TiO2 (1.08) > dark/TiO2 (0.7) > visible (0.28) > dark (0.03). The application of TiO2 doped with silver strongly improved the ability of disinfection treatment. The study of mineralization of E. coli by measurement of TOC (total organic carbon) removal percentage showed that the visible light may effectively be applied for the disinfection unit of water and wastewater treatment system by using photocatalysts of Ag-TiO2. |
| format | Article |
| id | doaj-art-9271fbffe14843e1b0b45fc3253a620b |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-9271fbffe14843e1b0b45fc3253a620b2025-02-03T07:25:50ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/640487640487Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation MethodRobert Liu0H. S. Wu1Ruth Yeh2C. Y. Lee3Yungtse Hung4Department of Chemical and Materials Engineering, Minghsin University of Science and Technology, Hsinchu 30401, TaiwanDepartment of Chemical and Materials Engineering, Minghsin University of Science and Technology, Hsinchu 30401, TaiwanDepartment of Chemical and Materials Engineering, Minghsin University of Science and Technology, Hsinchu 30401, TaiwanDepartment of Chemical and Materials Engineering, Minghsin University of Science and Technology, Hsinchu 30401, TaiwanDepartment of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH 44115-2214, USAPreparation of photocatalysts of TiO2 and Ag-TiO2 was carried out by coprecipitation method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), SEM, EDX, and XRF analysis. The disinfection of E. coli, a model indicator organism for the safe water supply, was investigated by using TiO2 and Ag-TiO2 under different light sources. The treatment efficacy for the inactivation of E. coli would be UV/Ag-TiO2; visible/Ag-TiO2; dark/Ag-TiO2; UV (all 100%) > UV/TiO2 (99%) > visible/TiO2 (96%) > dark/TiO2 (87%) > visible (23%) > dark (19%). The order of disinfection efficiency by their corresponding kinetic initial apparent rate constants, 𝑘app, (min−1) would be UV/Ag-TiO2; visible/Ag-TiO2 (both 6.67) > UV (6.6) > dark/Ag-TiO2 (6.56) > UV/TiO2 (1.62) > visible/TiO2 (1.08) > dark/TiO2 (0.7) > visible (0.28) > dark (0.03). The application of TiO2 doped with silver strongly improved the ability of disinfection treatment. The study of mineralization of E. coli by measurement of TOC (total organic carbon) removal percentage showed that the visible light may effectively be applied for the disinfection unit of water and wastewater treatment system by using photocatalysts of Ag-TiO2.http://dx.doi.org/10.1155/2012/640487 |
| spellingShingle | Robert Liu H. S. Wu Ruth Yeh C. Y. Lee Yungtse Hung Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method International Journal of Photoenergy |
| title | Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method |
| title_full | Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method |
| title_fullStr | Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method |
| title_full_unstemmed | Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method |
| title_short | Synthesis and Bactericidal Ability of TiO2 and Ag-TiO2 Prepared by Coprecipitation Method |
| title_sort | synthesis and bactericidal ability of tio2 and ag tio2 prepared by coprecipitation method |
| url | http://dx.doi.org/10.1155/2012/640487 |
| work_keys_str_mv | AT robertliu synthesisandbactericidalabilityoftio2andagtio2preparedbycoprecipitationmethod AT hswu synthesisandbactericidalabilityoftio2andagtio2preparedbycoprecipitationmethod AT ruthyeh synthesisandbactericidalabilityoftio2andagtio2preparedbycoprecipitationmethod AT cylee synthesisandbactericidalabilityoftio2andagtio2preparedbycoprecipitationmethod AT yungtsehung synthesisandbactericidalabilityoftio2andagtio2preparedbycoprecipitationmethod |