Photocatalytical Inactivation of Enterococcus faecalis from Water Using Functional Materials Based on Natural Zeolite and Titanium Dioxide

doi:10.1016/S1004-9541(14)60031-8

Chin.J.Chem.Eng. ›› 2014, Vol. 22 ›› Issue (1): 38-43.DOI: 10.1016/S1004-9541(14)60031-8

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Photocatalytical Inactivation of Enterococcus faecalis from Water Using Functional Materials Based on Natural Zeolite and Titanium Dioxide

Cornelia Bandas (Ratiu)^1,2, Corina Orha², Corina Misca³, Carmen Lazau², Paula Sfirloaga², Sorin Olariu⁴

1 National Institute for Research and Development in Microtechnologies, Bucharest 077190, Romania;
2 National Institute for Research and Development in Electrochemistry and Condensed Matter, Condensed Matter Department, Timisoara 300254, Romania;
3 Banat's University of Agricultural Sciences and Veterinary Medicine of Timisoara, Faculty of Food Products Technology, Timisoara 300645, Romania;
4 Medical and Pharmaceutical University "Victor Babes", Timisoara 300041, Romania

Received:2012-10-04 Revised:2013-06-28 Online:2014-01-04 Published:2014-01-05
Contact: Carmen Lazau
Supported by:
Supported by the Sectoral Operational Programme Human Resources Development (SOP HRD) Financed from the European Social Fund and by the Romanian Government under the Contract Number POSDRU/89/1.5/S/63700.

Photocatalytical Inactivation of Enterococcus faecalis from Water Using Functional Materials Based on Natural Zeolite and Titanium Dioxide

Cornelia Bandas (Ratiu)^1,2, Corina Orha², Corina Misca³, Carmen Lazau², Paula Sfirloaga², Sorin Olariu⁴

1 National Institute for Research and Development in Microtechnologies, Bucharest 077190, Romania;
2 National Institute for Research and Development in Electrochemistry and Condensed Matter, Condensed Matter Department, Timisoara 300254, Romania;
3 Banat's University of Agricultural Sciences and Veterinary Medicine of Timisoara, Faculty of Food Products Technology, Timisoara 300645, Romania;
4 Medical and Pharmaceutical University "Victor Babes", Timisoara 300041, Romania

通讯作者: Carmen Lazau
基金资助:
Supported by the Sectoral Operational Programme Human Resources Development (SOP HRD) Financed from the European Social Fund and by the Romanian Government under the Contract Number POSDRU/89/1.5/S/63700.

Abstract

Abstract: The functional materials based on natural zeolite (clinoptilolite), TiO₂-zeolite and Ag-TiO₂-zeolite have been successfully synthesized by solid-state reaction in fast-hydrothermal conditions. The obtained functional materials were investigated by X-ray diffraction (XRD), FT-IR (Fourier transform infrared) spectroscopy, DRUV-VIS (diffuse reflectance ultraviolet-visible) spectroscopy, BET (Brunauer-Emmett-Teller) and SEM/EDX (scanning electron microscope/energy dispersive X-ray spectrometer) analyses. The XRD results indicated that the clinoptilolite structure has a good thermal stabilization after the fast-hydrothermal treatment. Also, the high specific surface area about 92.55 m²·g^-1 was noticed for Ag-TiO₂-zeolite functional material. The presence of dopants was evidenced from EDX spectra. The enhanced bactericidal activity of Ag-TiO₂-zeolite catalyst is proved through damaging of Enterococcus faecalis colonies under visible irradiation, at different material doses and irradiation times.

Key words: titanium dioxide, composite, catalytic properties, Enterococcus faecalis

摘要： The functional materials based on natural zeolite (clinoptilolite), TiO₂-zeolite and Ag-TiO₂-zeolite have been successfully synthesized by solid-state reaction in fast-hydrothermal conditions. The obtained functional materials were investigated by X-ray diffraction (XRD), FT-IR (Fourier transform infrared) spectroscopy, DRUV-VIS (diffuse reflectance ultraviolet-visible) spectroscopy, BET (Brunauer-Emmett-Teller) and SEM/EDX (scanning electron microscope/energy dispersive X-ray spectrometer) analyses. The XRD results indicated that the clinoptilolite structure has a good thermal stabilization after the fast-hydrothermal treatment. Also, the high specific surface area about 92.55 m²·g^-1 was noticed for Ag-TiO₂-zeolite functional material. The presence of dopants was evidenced from EDX spectra. The enhanced bactericidal activity of Ag-TiO₂-zeolite catalyst is proved through damaging of Enterococcus faecalis colonies under visible irradiation, at different material doses and irradiation times.

关键词: titanium dioxide, composite, catalytic properties, Enterococcus faecalis

Cornelia Bandas (Ratiu), Corina Orha, Corina Misca, Carmen Lazau, Paula Sfirloaga, Sorin Olariu. Photocatalytical Inactivation of Enterococcus faecalis from Water Using Functional Materials Based on Natural Zeolite and Titanium Dioxide[J]. Chin.J.Chem.Eng., 2014, 22(1): 38-43.

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Photocatalytical Inactivation of Enterococcus faecalis from Water Using Functional Materials Based on Natural Zeolite and Titanium Dioxide

Photocatalytical Inactivation of Enterococcus faecalis from Water Using Functional Materials Based on Natural Zeolite and Titanium Dioxide

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