CuO/Cu(OH) 2 hierarchical nanostructures as bactericidal photocatalysts

Various morphologies of CuO/Cu(OH)2 nanostructures with different adsorbed –OH contents were synthesized on an acid-treated Cu foil through variation of NaOH concentration from 0 to 50 mM with an in situoxidation method. X-ray diffractometry and X-ray photoelectron spectroscopy (XPS) indicated formation of CuO on the Cu(OH)2 crystalline phase at a growth temperature of 60 °C for 20 h. Antibacterial activity of the nanostructures against Escherichia coli bacteria was studied in the dark and under light irradiation. The nanostructures grown at a NaOH concentration of 30 mM showed the highest surface area and the strongest antibacterial activity among the samples. After elimination of the contribution of the effective surface area of the nanostructures to the antibacterial activity, it was found that the surface morphology and chemical composition of the nanostructures were the other most important parameters in the antibacterial activity of the nanostructures. Using XPS analysis, the better photocatalytic activity per surface area of the nanostructures prepared at higher NaOH concentrations was substantially attributed to the amount of adsorbed OH bonds on the surface of the nanostructures.

[1]  Omid Akhavan,et al.  Toxicity of graphene and graphene oxide nanowalls against bacteria. , 2010, ACS nano.

[2]  Angelo Taglietti,et al.  Self-assembled monolayers of silver nanoparticles firmly grafted on glass surfaces: low Ag+ release for an efficient antibacterial activity. , 2010, Journal of Colloid and Interface Science.

[3]  O. Akhavan,et al.  Cu and CuO nanoparticles immobilized by silica thin films as antibacterial materials and photocatalysts , 2010 .

[4]  O. Akhavan,et al.  Visible light photo-induced antibacterial activity of CNT–doped TiO2 thin films with various CNT contents , 2010 .

[5]  O. Akhavan,et al.  Self-accumulated Ag nanoparticles on mesoporous TiO2 thin film with high bactericidal activities , 2010 .

[6]  N. Durán,et al.  Development of nanostructured silver vanadates decorated with silver nanoparticles as a novel antibacterial agent , 2010, Nanotechnology.

[7]  Wen Chen,et al.  Field emission properties of one-dimensional single CuO nanoneedle by in situ microscopy , 2010 .

[8]  R. P. Wijesundera.  Fabrication of the CuO/Cu2O heterojunction using an electrodeposition technique for solar cell applications , 2010 .

[9]  A. P. L. Batista,et al.  Preparation of CuO/SiO2 and photocatalytic activity by degradation of methylene blue , 2010 .

[10]  Z. Rozynek,et al.  Carbonate-Assisted Hydrothermal Synthesis of Nanoporous CuO Microstructures and Their Application in Catalysis , 2010 .

[11]  O. Akhavan,et al.  Hydrothermal synthesis of ZnO nanorod arrays for photocatalytic inactivation of bacteria , 2009 .

[12]  W. Ho,et al.  Interfacial Hydrothermal Synthesis of Cu@Cu2O Core−Shell Microspheres with Enhanced Visible-Light-Driven Photocatalytic Activity , 2009 .

[13]  O. Akhavan,et al.  Photocatalytic property of Fe2O3 nanograin chains coated by TiO2 nanolayer in visible light irradiation , 2009 .

[14]  S. Mohajerzadeh,et al.  Synthesis of titania/carbon nanotube heterojunction arrays for photoinactivation of E. coli in visible light irradiation , 2009 .

[15]  O. Akhavan,et al.  Bactericidal effects of Ag nanoparticles immobilized on surface of SiO2 thin film with high concentration , 2009 .

[16]  O. Akhavan,et al.  Synthesis and electrochromic study of sol–gel cuprous oxide nanoparticles accumulated on silica thin film , 2009 .

[17]  Omid Akhavan,et al.  Photocatalytic Reduction of Graphene Oxide Nanosheets on TiO2 Thin Film for Photoinactivation of Bacteria in Solar Light Irradiation , 2009 .

[18]  Georg M. Guebitz,et al.  CuO–cotton nanocomposite: Formation, morphology, and antibacterial activity , 2009 .

[19]  O. Akhavan,et al.  Lasting antibacterial activities of Ag-TiO2/Ag/a-TiO2 nanocomposite thin film photocatalysts under solar light irradiation. , 2009, Journal of colloid and interface science.

[20]  O. Akhavan,et al.  Capping antibacterial Ag nanorods aligned on Ti interlayer by mesoporous TiO2 layer , 2009 .

[21]  F. Gao,et al.  Copper-based nanostructures: promising antibacterial agents and photocatalysts. , 2009, Chemical communications.

[22]  O. Akhavan,et al.  Storage of Ag nanoparticles in pore-arrays of SU-8 matrix for antibacterial applications , 2009 .

[23]  Laigui Yu,et al.  Fabrication of Functionalized Copper Compound Hierarchical Structure with Bionic Superhydrophobic Properties , 2009 .

[24]  Feng Gao,et al.  Morphology effect on antibacterial activity of cuprous oxide. , 2009, Chemical communications.

[25]  M. Abdel Rafea,et al.  Determination of the optical band gap for amorphous and nanocrystalline copper oxide thin films prepared by SILAR technique , 2009 .

[26]  O. Akhavan,et al.  Enhancement of antibacterial properties of Ag nanorods by electric field , 2009, Science and technology of advanced materials.

[27]  O. Akhavan.  Chemical durability of metallic copper nanoparticles in silica thin films synthesized by sol–gel , 2008 .

[28]  Jinping Liu,et al.  Formation of hierarchical CuO microcabbages as stable bionic superhydrophobic materials via a room-temperature solution-immersion process , 2008 .

[29]  J. S. Lee,et al.  Flower-shaped CuO nanostructures: Structural, photocatalytic and XANES studies , 2008 .

[30]  Youfei Zheng,et al.  Synthesis of flower-like CuO nanostructures as a sensitive sensor for catalysis , 2008 .

[31]  P. Bowen,et al.  Inactivation of E. coli mediated by high surface area CuO accelerated by light irradiation >360 nm , 2008 .

[32]  Fan Yang,et al.  Excellent antimicrobial properties of mesoporous anatase TiO2 and Ag/TiO2 composite films , 2008 .

[33]  Byung-Joo Kim,et al.  Antibacterial behavior of transition-metals-decorated activated carbon fibers. , 2008, Journal of colloid and interface science.

[34]  M. Krunks,et al.  Surface analysis of spray deposited copper indium disulfide films , 2008 .

[35]  Menachem Elimelech,et al.  Antibacterial effects of carbon nanotubes: size does matter! , 2008, Langmuir : the ACS journal of surfaces and colloids.

[36]  Anne Kahru,et al.  Toxicity of nanosized and bulk ZnO, CuO and TiO2 to bacteria Vibrio fischeri and crustaceans Daphnia magna and Thamnocephalus platyurus. , 2008, Chemosphere.

[37]  Jana Soukupova,et al.  Effect of Surfactants and Polymers on Stability and Antibacterial Activity of Silver Nanoparticles (NPs) , 2008 .

[38]  A. Millis,et al.  Optical conductivity and the correlation strength of high-temperature copper-oxide superconductors , 2007, 0712.2392.

[39]  J. Kiwi,et al.  Raschig rings-Fe2O3 composite photocatalyst activate in the degradation of 4-chlorophenol and Orange II under daylight irradiation , 2007 .

[40]  Menachem Elimelech,et al.  Single-walled carbon nanotubes exhibit strong antimicrobial activity. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[41]  Meiye Li,et al.  In situ synthesis and assembly of copper oxide nanocrystals on copper foil via a mild hydrothermal process , 2006 .

[42]  Jinping Liu,et al.  Hierarchical nanostructures of cupric oxide on a copper substrate: controllable morphology and wettability , 2006 .

[43]  Milan Kolar,et al.  Silver colloid nanoparticles: synthesis, characterization, and their antibacterial activity. , 2006, The journal of physical chemistry. B.

[44]  Oleg M. Sarkisov,et al.  Laser kinetic spectroscopy of the interfacial charge transfer between membrane cell walls of E. coli and TiO2 , 2006 .

[45]  Shihe Yang,et al.  Room temperature growth of CuO nanorod arrays on copper and their application as a cathode in dye-sensitized solar cells , 2005 .

[46]  J. Knowles,et al.  Characterisation of antibacterial copper releasing degradable phosphate glass fibres. , 2005, Biomaterials.

[47]  Xiaoyuan Li,et al.  Copper-based nanowire materials: templated syntheses, characterizations, and applications. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[48]  V. Nadtochenko,et al.  Dynamics of E. coli membrane cell peroxidation during TiO2 photocatalysis studied by ATR-FTIR spectroscopy and AFM microscopy , 2005 .

[49]  E. Başaran,et al.  The preparation of copper(II) oxide thin films and the study of their microstructures and optical properties , 2004 .

[50]  Sophia V. Kyriacou,et al.  Using nanoparticle optics assay for direct observation of the function of antimicrobial agents in single live bacterial cells. , 2004, Biochemistry.

[51]  Craig A. Grimes,et al.  Synthesis of CuO and Cu_2O crystalline nanowires using Cu(OH)_2 nanowire templates , 2003 .

[52]  K. Hashimoto,et al.  Bactericidal activity of copper-deposited TiO2 thin film under weak UV light illumination. , 2003, Environmental science & technology.

[53]  J. Pierson,et al.  Cuprite, paramelaconite and tenorite films deposited by reactive magnetron sputtering , 2003 .

[54]  Parmanand Sharma,et al.  H2S gas sensing mechanism of SnO2 films with ultrathin CuO dotted islands , 2002 .

[55]  Thomas J. Richardson,et al.  Electrochromism in copper oxide thin films , 2000 .

[56]  Akira Fujishima,et al.  Titanium dioxide photocatalysis , 2000 .

[57]  D. Goodman,et al.  Correlation of Relative X-ray Photoelectron Spectroscopy Shake-up Intensity with CuO Particle Size , 1999 .

[58]  H. Tosine,et al.  Photodechlorination of PCB's in the presence of titanium dioxide in aqueous suspensions , 1976, Bulletin of environmental contamination and toxicology.

[59]  M. J. Howes,et al.  Electroforming and switching in copper oxide films , 1974 .

[60]  N. Hebalkar,et al.  Silica-silver core-shell particles for antibacterial textile application. , 2011, Colloids and surfaces. B, Biointerfaces.

[61]  S. Mohajerzadeh,et al.  Silver nanoparticles within vertically aligned multi-wall carbon nanotubes with open tips for antibacterial purposes , 2011 .

[62]  Yu Zhou,et al.  Self-assembled synthesis of hierarchical nanostructured CuO with various morphologies and their application as anodes for lithium ion batteries , 2010 .

[63]  P. B. Punjabi,et al.  Photocatalytic Degradation of Crystal Violet by Use of Copper Oxide as Semiconductor , 2009 .

[64]  John T. L. Thong,et al.  Large-scale synthesis and field emission properties of vertically oriented CuO nanowire films , 2004 .

[65]  M. Kokkoris,et al.  Study of Antibacterial Composite Cu/SiO2 Thin Coatings , 2003 .

[66]  W. Stickle,et al.  Handbook of X-Ray Photoelectron Spectroscopy , 1992 .