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首页> 外文期刊>Journal of nano research >Synthesis Photocatalytic TiO_2/ZnO Nanocomposite and Investigation through Anatase, Wurtzite and ZnTiO_3 Phases Antibacterial Behaviors
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Synthesis Photocatalytic TiO_2/ZnO Nanocomposite and Investigation through Anatase, Wurtzite and ZnTiO_3 Phases Antibacterial Behaviors

机译：合成光催化TiO_2 / ZnO纳米复合材料及其锐钛矿，纤锌矿和ZnTiO_3相的抗菌行为研究

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Titanium dioxide is prepared by sol gel method from titanium tetraisopropoxide (TTIP) as precursor and likewise zinc oxide is prepared by sol gel method from zinc acetate dehydrate (ZAD) as precursor. The composite sols are prepared in three different molar ratios 90TiO2: 10ZnO, 70TiO2: 30ZnO and 50TiO2: 50ZnO. Thin film deposition is carried out by dip coating technique. Crystal structure, surface morphology and photocatalytic activity of the prepared nanocomposite thin films are investigated. The antibacterial activity of the prepared nanocomposite thin film against E-coli ATCC 25922 bacteria is examined by placing the thin film in standard aqueous E-coli medium under UV light for 1, 2, 3 and 4 hours and then counting the bacteria with Standard Plate Count Agar (SPC) technique. The prepared thin films have shown strong antibacterial activity in the presence of UV light and by increasing the ZnO molar ratio from 10 to 50, antibacterial activity of the thin films decreases because of decreases in the anatase phase of the TiO2. In the dark conditions by increasing the molar ratio of ZnO, the antibacterial activity of the thin films increases and this phenomenon is related to increasing the zinc ions in the thin films.
机译：通过溶胶凝胶法由四异丙氧基钛（TTIP）作为前体制备二氧化钛，同样通过溶胶凝胶法由乙酸锌脱水物（ZAD）作为前体制备氧化锌。以三种不同的摩尔比90TiO 2 ∶10ZnO，70TiO 2 ∶30ZnO和50TiO 2 ∶50ZnO制备复合溶胶。薄膜沉积通过浸涂技术进行。研究了制备的纳米复合薄膜的晶体结构，表面形貌和光催化活性。制备的纳米复合薄膜对大肠杆菌ATCC 25922细菌的抗菌活性可通过将薄膜置于标准水性大肠杆菌培养基中，在紫外线灯下照射1、2、3和4小时，然后用标准平板计数细菌来检查计数琼脂（SPC）技术。所制备的薄膜在紫外光的存在下显示出强的抗菌活性，并且通过将ZnO摩尔比从10增加到50，由于TiO 2的锐钛矿相的减少，薄膜的抗菌活性降低。在黑暗条件下，通过增加ZnO的摩尔比，薄膜的抗菌活性增加，并且这种现象与增加薄膜中的锌离子有关。

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