Inactivation of Salmonella Typhi using Fe~(3+) Doped TiO_2/3SnO_2 Photocatalytic Powders and Films

Lek Sikong; Budsabakorn Kongreong; Duangporn Kantachote; Weerawan Sutthisripok

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Inactivation of Salmonella Typhi using Fe~(3+) Doped TiO_2/3SnO_2 Photocatalytic Powders and Films

机译：Fe〜（3+）掺杂TiO_2 / 3SnO_2光催化粉末和薄膜灭活鼠伤寒沙门氏菌

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The aim of the present study is to synthesize Fe~(3+)doped TiO_2/3SnO_2 powder and evaluate its antibacterial performance coated on polyvinylchloride films for fresh food packaging. Fe~(3+)doped TiO_2/3SnO_2 nanoparticles were prepared as a photocatalyst through the sol-gel method with concentrations of 0.3-1.2 mol% and a calcination temperature of 400℃. It was found that calcination temperatures strongly affect the phases and phase transformation of TiO_2. According to XRD analysis, the anatase crystalline was formed at the calcination temperature of 400℃. In the present work, the photocatalytic performance was determined through methylene blue degradation. The antibacterial activity against Salmonella typhi was investigated with a vitro test, from which the mixture of conidial suspension and Fe~(3+)doped TiO_2/3SnO_2 powder was added to Nutrient agar (NA) plates under UV and visible light irradiation, respectively. It was found that Fe~(3+)doped TiO_2/3SnO_2 nanoparticles enhance photocatalytic activity and bacterial inactivation efficiency. In addition, Fe~(3+)doped TiO_2/3SnO_2 thin films can destroy the cell walls of bacteria within 240 min. Furthermore, the disinfection efficiency of TiO_2/3SnO_2/0.5 Fe~(3+) is greater under UV irradiation than it is under visible light.

机译：本研究的目的是合成Fe〜（3+）掺杂的TiO_2 / 3SnO_2粉末，并评价其在新鲜食品包装用聚氯乙烯薄膜上的抗菌性能。通过溶胶-凝胶法制备了Fe〜（3+）掺杂的TiO_2 / 3SnO_2纳米粒子作为光催化剂，其浓度为0.3〜1.2mol％，煅烧温度为400℃。发现煅烧温度强烈影响TiO_2的相和相变。根据XRD分析，在400℃的煅烧温度下形成了锐钛矿晶体。在目前的工作中，通过亚甲基蓝降解来确定光催化性能。通过体外试验研究了对鼠伤寒沙门氏菌的抗菌活性，分别在紫外和可见光照射下，将分生孢子悬浮液和Fe〜（3+）掺杂的TiO_2 / 3SnO_2粉末的混合物分别加入到营养琼脂平板上。结果表明，Fe〜（3+）掺杂的TiO_2 / 3SnO_2纳米粒子增强了光催化活性和细菌灭活效率。另外，Fe〜（3+）掺杂的TiO_2 / 3SnO_2薄膜可以在240min内破坏细菌的细胞壁。此外，TiO_2 / 3SnO_2 / 0.5 Fe〜（3+）的杀菌效率在紫外光照射下比在可见光下要高。

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来源
《Journal of nano research》 |2010年第2010期|p.89-97|共9页
作者
Lek Sikong; Budsabakorn Kongreong; Duangporn Kantachote; Weerawan Sutthisripok;
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作者单位

Department of Mining and Materials Engineering, Faculty of Engineering,NANOTEC Center of Excellence at Prince of Songkla University, Hat Yai, Songkhla, Thailand;

Department of Mining and Materials Engineering, Faculty of Engineering;

Department of Microbiology Science, Faculty of Science, Prince of Songkla University (PSU) Songkhla, Thailand;

Department of Mining and Materials Engineering, Faculty of Engineering,NANOTEC Center of Excellence at Prince of Songkla University, Hat Yai, Songkhla, Thailand;

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正文语种 eng
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关键词
photocatalytic; TiO_2 coated film; antibacterial; Fe~(3+)doped TiO_2/3SnO_2; anatase phase; salmonella typhi;

机译：光催化TiO_2涂层膜;抗菌;Fe〜（3+）掺杂的TiO_2 / 3SnO_2;锐钛矿相伤寒沙门氏菌;

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Inactivation of Salmonella Typhi using Fe~(3+) Doped TiO_2/3SnO_2 Photocatalytic Powders and Films

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