Spectral features and antibacterial properties of Cu-doped ZnO nanoparticles prepared by sol-gel method  

作　　者：Alireza Samavati A F Ismail Hadi Nur Z Othaman M K Mustafa 

机构地区：[1]Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research,Universiti Teknologi Malaysia [2]Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia [3]Faculty of Science Technology and Human Development, Universiti Tun Hussein Onn Malaysia

出　　处：《Chinese Physics B》2016年第7期459-465,共7页中国物理B（英文版）

基　　金：Project supported by the Universiti Teknologi Malaysia(UTM)(Grant No.R.J1300000.7809.4F626);RMC for postdoctoral grants

摘　　要：Zn（1-x）Cux O（x=0.00, 0.01, 0.03, and 0.05） nanoparticles are synthesized via the sol-gel technique using gelatin and nitrate precursors. The impact of copper concentration on the structural, optical, and antibacterial properties of these nanoparticles is demonstrated. Powder x-ray diffraction investigations have illustrated the organized Cu doping into ZnO nanoparticles up to Cu concentration of 5%（x = 0.05）. However, the peak corresponding to CuO for x= 0.01 is not distinguishable. The images of field emission scanning electron microscopy demonstrate the existence of a nearly spherical shape with a size in the range of 30–52 nm. Doping Cu creates the Cu–O–Zn on the surface and results in a decrease in the crystallite size. Photoluminescence and absorption spectra display that doping Cu causes an increment in the energy band gap. The antibacterial activities of the nanoparticles are examined against Escherichia coli（Gram negative bacteria）cultures using optical density at 600 nm and a comparison of the size of inhibition zone diameter. It is found that both pure and doped ZnO nanoparticles indicate appropriate antibacterial activity which rises with Cu doping.Zn（1-x）Cux O（x=0.00, 0.01, 0.03, and 0.05） nanoparticles are synthesized via the sol-gel technique using gelatin and nitrate precursors. The impact of copper concentration on the structural, optical, and antibacterial properties of these nanoparticles is demonstrated. Powder x-ray diffraction investigations have illustrated the organized Cu doping into ZnO nanoparticles up to Cu concentration of 5%（x = 0.05）. However, the peak corresponding to CuO for x= 0.01 is not distinguishable. The images of field emission scanning electron microscopy demonstrate the existence of a nearly spherical shape with a size in the range of 30–52 nm. Doping Cu creates the Cu–O–Zn on the surface and results in a decrease in the crystallite size. Photoluminescence and absorption spectra display that doping Cu causes an increment in the energy band gap. The antibacterial activities of the nanoparticles are examined against Escherichia coli（Gram negative bacteria）cultures using optical density at 600 nm and a comparison of the size of inhibition zone diameter. It is found that both pure and doped ZnO nanoparticles indicate appropriate antibacterial activity which rises with Cu doping.

关 键 词：Cu-doped ZnO nanoparticles photoluminescence antibacterial E.coli 

分 类 号：TB383.1[一般工业技术—材料科学与工程]