Enhancement of Photocatalytic and Antibacterial Activities of ZnO:Ag Nanopowders Through the Addition of Bamboo Charcoal:An Efficient Natural Adsorbent
来源期刊：Acta Metallurgica Sinica2017年第12期
论文作者：K.Nithiyadevi K.Ravichandran
文章页码：1249 - 1256
摘 要：This research article explains the removal of methylene blue（MB）and malachite green（MG）from aqueous solution using adsorption/photodegradation activity of Zn O:Ag/bamboo charcoal（BC）nanocomposite.In addition,the antibacterial studies of the prepared samples were tested against Staphylococcus aureus（S.aureus）Gram-positive and Escherichia coli（E.coli）Gram-negative bacteria by the well diffusion method.The Zn O:Ag/BC nanocomposite exhibits superior photocatalytic activity compared with Zn O:Ag.Remarkable degradation efficiencies of 93.95%（MB）and 95.75%（MG）were recorded for Zn O:Ag/BC nanocomposite after 45 min.The degradation process follows a pseudo-first-order kinetics.The rate constant of Zn O:Ag/BC nanocomposite is two times greater than that of pristine Zn O nanopowder for the degradation of MB dye,while for MG dye degradation,it is three times.It is found that the Zn O:Ag/BC nanocomposite shows a higher rate of dye removal due to excellent adsorbing properties of bamboo charcoal（BC）.The Zn O:Ag/BC nanocomposite showed better antibacterial properties compared to Zn O:Ag.In this study,the samples were prepared using a simple and low-cost soft chemical route and they were characterized by optical,structural,surface morphological,antibacterial and photocatalytic properties.These characterization studies substantiate the discussions on the photocatalytic and antibacterial activities of the synthesized samples.
K.Nithiyadevi1,2，K.Ravichandran1
1. PG Research and Department of Physics,AVVM Sri Pushpam College (Autonomous)2. Department of Physics,Bharathidasan University Constituent College (Women)
摘 要：This research article explains the removal of methylene blue（MB）and malachite green（MG）from aqueous solution using adsorption/photodegradation activity of Zn O:Ag/bamboo charcoal（BC）nanocomposite.In addition,the antibacterial studies of the prepared samples were tested against Staphylococcus aureus（S.aureus）Gram-positive and Escherichia coli（E.coli）Gram-negative bacteria by the well diffusion method.The Zn O:Ag/BC nanocomposite exhibits superior photocatalytic activity compared with Zn O:Ag.Remarkable degradation efficiencies of 93.95%（MB）and 95.75%（MG）were recorded for Zn O:Ag/BC nanocomposite after 45 min.The degradation process follows a pseudo-first-order kinetics.The rate constant of Zn O:Ag/BC nanocomposite is two times greater than that of pristine Zn O nanopowder for the degradation of MB dye,while for MG dye degradation,it is three times.It is found that the Zn O:Ag/BC nanocomposite shows a higher rate of dye removal due to excellent adsorbing properties of bamboo charcoal（BC）.The Zn O:Ag/BC nanocomposite showed better antibacterial properties compared to Zn O:Ag.In this study,the samples were prepared using a simple and low-cost soft chemical route and they were characterized by optical,structural,surface morphological,antibacterial and photocatalytic properties.These characterization studies substantiate the discussions on the photocatalytic and antibacterial activities of the synthesized samples.
关键词：
