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首页> 外文期刊>International Journal of Environmental Research and Public Health >Disinfection of the Water Borne Pathogens Escherichia coli and Staphylococcus aureus by Solar Photocatalysis Using Sonochemically Synthesized Reusable Ag@ZnO Core-Shell Nanoparticles
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Disinfection of the Water Borne Pathogens Escherichia coli and Staphylococcus aureus by Solar Photocatalysis Using Sonochemically Synthesized Reusable Ag@ZnO Core-Shell Nanoparticles

机译：声化学合成的可重复使用的Ag @ ZnO核壳纳米粒子的太阳光催化消毒水生病原性大肠杆菌和金黄色葡萄球菌。

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Water borne pathogens present a threat to human health and their disinfection from water poses a challenge, prompting the search for newer methods and newer materials. Disinfection of the Gram-negative bacterium Escherichia coli and the Gram-positive coccal bacterium Staphylococcus aureus in an aqueous matrix was achieved within 60 and 90 min, respectively, at 35 °C using solar-photocatalysis mediated by sonochemically synthesized Ag@ZnO core-shell nanoparticles. The efficiency of the process increased with the increase in temperature and at 55 °C the disinfection for the two bacteria could be achieved in 45 and 60 min, respectively. A new ultrasound-assisted chemical precipitation technique was used for the synthesis of Ag@ZnO core-shell nanoparticles. The characteristics of the synthesized material were established using physical techniques. The material remained stable even at 400 °C. Disinfection efficiency of the Ag@ZnO core-shell nanoparticles was confirmed in the case of real world samples of pond, river, municipal tap water and was found to be better than that of pure ZnO and TiO 2 (Degussa P25). When the nanoparticle- based catalyst was recycled and reused for subsequent disinfection experiments, its efficiency did not change remarkably, even after three cycles. The sonochemically synthesized Ag@ZnO core-shell nanoparticles thus have a good potential for application in solar photocatalytic disinfection of water borne pathogens.
机译：水传播的病原体对人类健康构成威胁，用水消毒会带来挑战，促使人们寻求更新的方法和材料。使用声光化学合成的Ag @ ZnO核壳介导的太阳光催化分别在35°C下于60和90分钟内在水性基质中实现革兰氏阴性细菌大肠杆菌和革兰氏阳性球菌金黄色葡萄球菌的消毒。纳米粒子。该过程的效率随着温度的升高而增加，在55°C时，两种细菌的​​消毒分别可在45分钟和60分钟内完成。一种新的超声辅助化学沉淀技术用于合成Ag @ ZnO核壳纳米粒子。使用物理技术建立了合成材料的特性。该材料即使在400°C下也保持稳定。在实际的池塘，河流，市政自来水样品中，证实了Ag @ ZnO核壳纳米颗粒的消毒效率，发现其优于纯ZnO和TiO 2（Degussa P25）。当基于纳米颗粒的催化剂被回收并重新用于随后的消毒实验时，即使经过三个循环，其效率也没有明显变化。声化学合成的Ag @ ZnO核壳纳米粒子因此具有很好的潜力，可用于水生病原体的太阳光催化消毒。

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