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Magnetically Separable Fe3 O4 @CdS Type-II Nanohybrids with Excellent Photocatalytic Activity and Antibacterial Properties.
ChemPlusChem ( IF 3.0 ) Pub Date : 2018-07-16 , DOI: 10.1002/cplu.201800315
Abdolraouf Samadi-Maybodi 1 , Mohammad Reza Shariati 1 , Abasalt Hosseinzadeh Colagar 2
Affiliation  

A magnetically separable Fe3 O4 @CdS type-II core-shell nanohybrid (NH) photocatalyst, with excellent antibacterial properties and photocatalytic activity, was synthesized and characterized by means of structural, elemental, and morphological analyses. Steady-state and time-resolved emission and absorption spectroscopy were also exploited to realize the location of charge-carrier wave functions in the NHs. The antibacterial activity of NHs was then evaluated against Escherichia coli (1.4×108  CFU mL-1 ; CFU=colony forming units) and Staphylococcus saprophyticus (1.2×108  CFU mL-1 ) as model strains of Gram-negative and -positive microbes. Compared with CdS and Fe3 O4 , the as-synthesized Fe3 O4 @CdS composite exhibited highly improved bactericidal activity and recyclability. Concentration values of 5.0 and 4.0 mg mL-1 were required for Fe3 O4 @CdS NHs to inhibit the growth of E. coli and S. saprophyticus, respectively. The contribution of OH. radicals to photocatalysis at the Fe3 O4 @CdS surface was also considered. Moreover, thiobarbituric acid reactive substances and protein carbonyl assay protocols have been exploited to monitor levels of oxidative damage to lipids and proteins in cells. Additionally, the photocatalytic activity of Fe3 O4 @CdS NHs was monitored for the degradation of xylenol orange dye. Compared with CdS and Fe3 O4 , as-synthesized Fe3 O4 @CdS displayed superior performances in the photodegradation of xylenol orange. Possible mechanisms involved in the degradation of xylenol orange are also discussed.

中文翻译:

具有出色的光催化活性和抗菌性能的磁性可分离Fe3 O4 @CdS II型纳米杂化物。

通过结构,元素和形态分析,合成并表征了具有优异抗菌性能和光催化活性的磁性可分离的Fe3O4 @ CdS II型核壳纳米杂化(NH)光催化剂。还利用稳态和时间分辨的发射光谱和吸收光谱来实现NHs中电荷载流子功能的定位。然后评估作为革兰氏阴性和阳性微生物模型菌株的大肠杆菌(1.4×108 CFU mL-1; CFU =菌落形成单位)和腐生葡萄球菌(1.2×108 CFU mL-1)的抗菌活性。与CdS和Fe3 O4相比,合成后的Fe3 O4 @CdS复合材料具有更高的杀菌活性和可回收性。浓度值为5.0和4。Fe3 O4 @CdS NHs分别需要0 mg mL-1来抑制大肠杆菌和腐生链球菌的生长。OH的贡献。Fe3 O4 @CdS表面的光催化自由基也被考虑在内。而且,已经开发了硫代巴比妥酸反应性物质和蛋白质羰基测定方案来监测细胞中脂质和蛋白质的氧化损伤水平。另外,监测了Fe3O4 @ CdS NHs的光催化活性,以检测二甲酚橙染料的降解。与CdS和Fe3 O4相比,合成后的Fe3 O4 @CdS在对二甲酚橙的光降解方面表现出优异的性能。还讨论了降解二甲苯酚橙的可能机理。Fe3 O4 @CdS表面的光催化自由基也被考虑在内。而且,已经开发了硫代巴比妥酸反应性物质和蛋白质羰基测定方案来监测细胞中脂质和蛋白质的氧化损伤水平。另外,监测了Fe3O4 @ CdS NHs的光催化活性,以检测二甲酚橙染料的降解。与CdS和Fe3 O4相比,合成后的Fe3 O4 @CdS在对二甲酚橙的光降解方面表现出优异的性能。还讨论了降解二甲苯酚橙的可能机理。Fe3 O4 @CdS表面的光催化自由基也被考虑在内。而且,已经开发了硫代巴比妥酸反应性物质和蛋白质羰基测定方案来监测细胞中脂质和蛋白质的氧化损伤水平。另外,监测了Fe3O4 @ CdS NHs的光催化活性,以检测二甲酚橙染料的降解。与CdS和Fe3 O4相比,合成后的Fe3 O4 @CdS在对二甲酚橙的光降解方面表现出优异的性能。还讨论了降解二甲苯酚橙的可能机理。监测了Fe3O4 @ CdS NHs的光催化活性,研究了其对二甲苯酚橙染料的降解。与CdS和Fe3 O4相比,合成后的Fe3 O4 @CdS在对二甲酚橙的光降解方面表现出优异的性能。还讨论了降解二甲苯酚橙的可能机理。监测了Fe3O4 @ CdS NHs的光催化活性,研究了其对二甲苯酚橙染料的降解。与CdS和Fe3 O4相比,合成后的Fe3 O4 @CdS在对二甲酚橙的光降解方面表现出优异的性能。还讨论了降解二甲苯酚橙的可能机理。
更新日期:2018-07-16
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