{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T23:02:35Z","timestamp":1791414155534,"version":"4.3.3"},"reference-count":57,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2018,10,23]],"date-time":"2018-10-23T00:00:00Z","timestamp":1540252800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>A simple, low-cost method was applied to prepare hybrid photocatalysts of copper (I) oxide\/titania. Five different TiO2 powders were used to perform the study of the effect of titania matrix on the photocatalytic and antimicrobial properties of prepared nanocomposites. The photocatalytic efficiency of such a dual heterojunction system was tested in three reaction systems: ultraviolet-visible (UV-Vis)-induced methanol dehydrogenation and oxidation of acetic acid, and 2-propanol oxidation under visible light irradiation. In all the reaction systems considered, the crucial enhancement of photocatalytic activity in relation to corresponding bare titania was observed. The reaction mechanism for a specific reaction and the influence of titania matrix were discussed. Furthermore, antimicrobial (bactericidal and fungicidal) properties of Cu2O\/TiO2 materials were analyzed. The antimicrobial activity was found under UV, visible and solar irradiation, and even for dark conditions. The origin of antimicrobial properties with emphasis on the role of titania matrix was also discussed.<\/jats:p>","DOI":"10.3390\/ma11112069","type":"journal-article","created":{"date-parts":[[2018,10,24]],"date-time":"2018-10-24T02:59:40Z","timestamp":1540349980000},"page":"2069","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":64,"title":["Enhanced Photocatalytic and Antimicrobial Performance of Cuprous Oxide\/Titania: The Effect of Titania Matrix"],"prefix":"10.3390","volume":"11","author":[{"given":"Marcin","family":"Janczarek","sequence":"first","affiliation":[{"name":"Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan"},{"name":"Department of Chemical Technology, Gdansk University of Technology, 80-233 Gdansk, Poland"},{"name":"Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, 60-965 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maya","family":"Endo","sequence":"additional","affiliation":[{"name":"Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kunlei","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0955-9268","authenticated-orcid":false,"given":"Ewa","family":"Kowalska","sequence":"additional","affiliation":[{"name":"Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2018,10,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"445","DOI":"10.1016\/j.solener.2004.03.031","article-title":"Photocatalytic water treatment: Solar energy applications","volume":"77","author":"Bahnemann","year":"2004","journal-title":"Sol. Energy"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1016\/j.catcom.2009.11.007","article-title":"Fabrication of ternary zinc cadmium sulfide photocatalysts with highly visible-light photocatalytic activity","volume":"11","author":"Song","year":"2010","journal-title":"Catal. Commun."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"7485","DOI":"10.1021\/acscatal.6b02089","article-title":"Recent advances in heterogeneous photocatalytic CO2 conversion to solar fuels","volume":"6","author":"Li","year":"2016","journal-title":"ACS Catal."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"269","DOI":"10.1126\/science.1061051","article-title":"Visible-light photocatalysis in nitrogen-doped titanium oxides","volume":"293","author":"Asahi","year":"2001","journal-title":"Science"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"29076","DOI":"10.1039\/C5RA01819F","article-title":"Plasmon-enhanced light harvesting: Applications in enhanced photocatalysis, photodynamic therapy and photovoltaics","volume":"5","author":"Zhou","year":"2015","journal-title":"RSC Adv."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"628","DOI":"10.1016\/j.jcis.2011.06.024","article-title":"Interfacial chemical bonding effect on the photocatalytic activity of TiO2\u2013SiO2 nanocoupling systems","volume":"361","author":"Fujishima","year":"2011","journal-title":"J. Colloid Interface Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"13392","DOI":"10.1039\/c2cp42055d","article-title":"How TiO2 crystallographic surfaces influence charge injection rates from a chemisorbed dye sensitiser","volume":"14","author":"Martsinovich","year":"2012","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"9919","DOI":"10.1021\/cr5001892","article-title":"Understanding TiO2 photocatalysis: Mechanisms and materials","volume":"114","author":"Schneider","year":"2014","journal-title":"Chem. Rev."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"812","DOI":"10.1002\/anie.201201200","article-title":"Semiconductor photocatalysis\u2014Mechanistic and synthetic aspects","volume":"52","author":"Kisch","year":"2013","journal-title":"Angew. Chem. Int. Ed."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1232","DOI":"10.1002\/smll.201402295","article-title":"1D copper nanostructures: Progress, challenges and opportunities","volume":"11","author":"Bhanushali","year":"2015","journal-title":"Small"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"16812","DOI":"10.1016\/j.ijhydene.2014.08.037","article-title":"Copper modified-TiO2 catalysts for hydrogen generation through photoreforming of organics. A short review","volume":"39","author":"Clarizia","year":"2014","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1016\/j.cej.2016.05.138","article-title":"Noble metal-modified octahedral anatase titania particles with enhanced activity for decomposition of chemical and microbiological pollutants","volume":"318","author":"Wei","year":"2017","journal-title":"Chem. Eng. J."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"012008","DOI":"10.1117\/1.JPE.7.012008","article-title":"Silver- and copper-modified decahedral anatase titania particles as visible light-responsive plasmonic photocatalyst","volume":"7","author":"Janczarek","year":"2017","journal-title":"J. Photonics Energy"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"547","DOI":"10.1016\/j.apcatb.2018.06.027","article-title":"Noble metal-modified faceted anatase titania photocatalysts: Octahedron versus decahedron","volume":"237","author":"Wei","year":"2018","journal-title":"Appl. Catal. B Environ."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"317","DOI":"10.3390\/catal7110317","article-title":"On the origin of enhanced photocatalytic activity of copper-modified titania in the oxidative reaction systems","volume":"7","author":"Janczarek","year":"2017","journal-title":"Catalysts"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"5143","DOI":"10.1021\/acs.jpcc.5b10703","article-title":"Surface modification of TiO2 with Ag nanoparticles and CuO nanoclusters for application in photocatalysis","volume":"120","author":"Kowalska","year":"2016","journal-title":"J. Phys. Chem. C"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"11720","DOI":"10.1039\/C7NR04805J","article-title":"Oxidation-stable plasmonic copper nanoparticles in photocatalytic TiO2 nanoarchitectures","volume":"9","author":"DeSario","year":"2017","journal-title":"Nanoscale"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1609","DOI":"10.1021\/nn2045888","article-title":"Hybrid CuxO\/TiO2 nanocomposites as risk-reduction materials in indoor environments","volume":"6","author":"Qiu","year":"2012","journal-title":"ACS Nano"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"5629","DOI":"10.1021\/am500131b","article-title":"Synthesis of Cu2O nanospheres decorated with TiO2 nanoislands, their enhanced photoactivity and stability under visible light illumination, and their post-illumination catalytic memory","volume":"6","author":"Liu","year":"2014","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1184","DOI":"10.1016\/j.matchemphys.2011.06.004","article-title":"Architecture of Cu2O@TiO2 core-shell heterojunction and photodegradation for 4-nitrophenol under simulated sunlight irradiation","volume":"129","author":"Chu","year":"2011","journal-title":"Mater. Chem. Phys."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1016\/j.cattod.2005.03.038","article-title":"Photocatalytic activity of Cu2O\/TiO2, Bi2O3\/TiO2 and ZnMn2O4\/TiO2 heterojunctions","volume":"101","author":"Bessekhouad","year":"2005","journal-title":"Catal. Today"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"7641","DOI":"10.1021\/es101711k","article-title":"High efficient photocatalytic degradation of p-nitrophenol on a unique Cu2O\/TiO2 p-n heterojunction network catalyst","volume":"44","author":"Yang","year":"2010","journal-title":"Environ. Sci. Technol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1104","DOI":"10.1016\/j.jpcs.2011.06.016","article-title":"Bifunctional photocatalysis of TiO2\/Cu2O composite under visible light: Ti3+ in organic pollutant degradation and water splitting","volume":"72","author":"Xiong","year":"2011","journal-title":"J. Phys. Chem. Solids"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"6351","DOI":"10.1039\/c2nr31859h","article-title":"In situ loading of ultra-small Cu2O particles on TiO2 nanosheets to enhance the visible-light photoactivity","volume":"4","author":"Liu","year":"2012","journal-title":"Nanoscale"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1465","DOI":"10.1021\/am505861c","article-title":"Creation of Cu2O@TiO2 composite photocatalysts with p\u2212n heterojunctions formed on exposed Cu2O facets, their energy band alignment study, and their enhanced photocatalytic activity under illumination with visible light","volume":"7","author":"Liu","year":"2015","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"17","DOI":"10.1016\/j.catcom.2013.11.011","article-title":"Cu2O\/TiO2 heterostructure nanotube arrays prepared by an electrodeposition method exhibiting enhanced photocatalytic activity for CO2 reduction to methanol","volume":"46","author":"Wang","year":"2014","journal-title":"Catal. Commun."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1211","DOI":"10.1039\/c3ee24162a","article-title":"p\u2013n Heterojunction photoelectrodes composed of Cu2O-loaded TiO2 nanotube arrays with enhanced photoelectrochemical and photoelectrocatalytic activities","volume":"6","author":"Wang","year":"2013","journal-title":"Energy Environ. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2111","DOI":"10.1021\/am900463g","article-title":"TiO2 Film\/Cu2O microgrid heterojunction with photocatalytic activity under solar light irradiation","volume":"1","author":"Zhang","year":"2009","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"13866","DOI":"10.1016\/j.ijhydene.2013.08.081","article-title":"The influence of the electrodeposition potential on the morphology of Cu2O\/TiO2 nanotube arrays and their visible-light-driven photocatalytic activity for hydrogen evolution","volume":"38","author":"Zhang","year":"2013","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1839","DOI":"10.1016\/j.catcom.2009.06.011","article-title":"Preparation and characterization of Cu2O\/TiO2 nano\u2013nano heterostructure photocatalysts","volume":"10","author":"Huang","year":"2009","journal-title":"Catal. Commun."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1016\/j.solidstatesciences.2008.04.013","article-title":"Preparation of cuprous oxides with different sizes and their behaviors of adsorption, visible-light driven photocatalysis and photocorrosion","volume":"11","author":"Huang","year":"2009","journal-title":"Solid State Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"6039","DOI":"10.1039\/C7NR08388B","article-title":"Oxygen-deficient photostable Cu2O for enhanced visible light photocatalytic activity","volume":"10","author":"Singh","year":"2018","journal-title":"Nanoscale"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"816","DOI":"10.1016\/j.ijhydene.2012.10.064","article-title":"Facile preparation and size-dependent photocatalytic activity of Cu2O nanocrystals modified titania for hydrogen evolution","volume":"38","author":"Li","year":"2013","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1002\/cctc.201300681","article-title":"Cu2O-decorated mesoporous TiO2 beads as a highly efficient photocatalyst for hydrogen production","volume":"6","author":"Cheng","year":"2014","journal-title":"ChemCatChem"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"6345","DOI":"10.1016\/j.ijhydene.2014.01.209","article-title":"Synergistic effect of Cu2O\/TiO2 heterostructure nanoparticle and its high H2 evolution activity","volume":"39","author":"Xi","year":"2014","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"736","DOI":"10.1016\/j.apsusc.2014.11.027","article-title":"Synthesis and characterization of Cu2O\/TiO2 photocatalysts for H2 evolution from aqueous solution with different scavengers","volume":"324","author":"Li","year":"2015","journal-title":"Appl. Surf. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1016\/j.solmat.2015.01.009","article-title":"Cu2O-sensitized TiO2 nanorods with nanocavities for highly efficient photocatalytic hydrogen production under solar irradiation","volume":"136","author":"Kumar","year":"2015","journal-title":"Sol. Energy Mater. Sol. Cells"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"22181","DOI":"10.1021\/jp107405u","article-title":"Highly stabilized and finely dispersed Cu2O\/TiO2: A promising visible sensitive photocatalyst for continuous production of hydrogen from glycerol:water mixtures","volume":"114","author":"Lalitha","year":"2010","journal-title":"J. Phys. Chem. C"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"257","DOI":"10.1016\/j.jphotochem.2004.10.018","article-title":"Water photoreduction with Cu2O quantum dots on TiO2 nano-particles","volume":"171","author":"Senevirathna","year":"2005","journal-title":"J. Photochem. Photobiol. A Chem."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"265","DOI":"10.1016\/j.jhazmat.2012.07.052","article-title":"Highly efficient antiviral and antibacterial activities of solid-state cuprous compounds","volume":"235","author":"Sunada","year":"2012","journal-title":"J. Hazard. Mater."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1016\/j.chemosphere.2017.05.118","article-title":"Graphene sponge decorated with copper nanoparticles as a novel bactericidal filter for inactivation of Escherichia coli","volume":"184","author":"Deng","year":"2017","journal-title":"Chemosphere"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"245","DOI":"10.1016\/j.watres.2014.06.022","article-title":"Incorporation of copper nanoparticles into paper for point-of-use water purification","volume":"63","author":"Dankovich","year":"2014","journal-title":"Water Res."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1016\/j.jcis.2011.01.101","article-title":"Photocatalytic hydrogen production over CuO-modified titania","volume":"357","author":"Yu","year":"2011","journal-title":"J. Colloid Interface Sci."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"417","DOI":"10.1016\/j.apcatb.2017.03.007","article-title":"High photocatalytic hydrogen production on Cu (II) pre-grafted Pt\/TiO2","volume":"209","author":"Dozzi","year":"2017","journal-title":"Appl. Catal. B Environ."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"7424","DOI":"10.1021\/acscatal.5b01562","article-title":"On oxygen activation at rutile- and anatase-TiO2","volume":"5","author":"Buchalska","year":"2015","journal-title":"ACS Catal."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"798","DOI":"10.1038\/nmat3697","article-title":"Band alignment of rutile and anatase TiO2","volume":"12","author":"Scanlon","year":"2013","journal-title":"Nat. Mater."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"10829","DOI":"10.1039\/c3ta11684k","article-title":"Modification of TiO2 by bimetallic Au\u2013Cu nanoparticles for wastewater treatment","volume":"1","author":"Hai","year":"2013","journal-title":"J. Mater. Chem. A"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"6431","DOI":"10.1016\/j.ijhydene.2012.01.075","article-title":"Cu2O\/Cu\/TiO2 nanotube Ohmic heterojunction arrays with enhanced photocatalytic hydrogen production activity","volume":"37","author":"Li","year":"2012","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"13017","DOI":"10.1016\/j.ijhydene.2013.03.128","article-title":"Controllable proton and CO2 photoreduction over Cu2O with various morphologies","volume":"38","author":"Handoko","year":"2013","journal-title":"Int. J. Hydrogen Energy"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1016\/j.cej.2016.01.008","article-title":"Decahedral-shaped anatase titania photocatalyst particles: Synthesis in a newly developed coaxial-flow gas-phase reactor","volume":"289","author":"Janczarek","year":"2016","journal-title":"Chem. Eng. J."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"12304","DOI":"10.1021\/la301813v","article-title":"Plasmon-enhanced photocatalytic properties of Cu2O nanowire\u2013Au nanoparticle assemblies","volume":"28","author":"Pan","year":"2012","journal-title":"Langmuir"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1016\/1010-6030(94)03906-B","article-title":"Exploiting the interparticle electron transfer process in the photocatalysed oxidation of phenol, 2-chlorophenol and pentachlorophenol: Chemical evidence for electron and hole transfer between coupled semiconductors","volume":"85","author":"Serpone","year":"1995","journal-title":"J. Photochem. Photobiol. A Chem."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"238","DOI":"10.1246\/cl.2009.238","article-title":"Correlation between photocatalytic activities and structural and physical properties of titanium(IV) oxide powders","volume":"38","author":"Murakami","year":"2009","journal-title":"Chem. Lett."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"2344","DOI":"10.1039\/b917399d","article-title":"Visible-light-induced photocatalysis through surface plasmon excitation of gold on titania surfaces","volume":"12","author":"Kowalska","year":"2010","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"5234","DOI":"10.1021\/am301153j","article-title":"Innovative TiO2\/Cu nanosurfaces inactivating bacteria in the minute range under low-intensity actinic light","volume":"4","author":"Baghriche","year":"2012","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1006\/emyc.1994.1013","article-title":"The electrostatic nature of the cell surface of Candida albicans: A role in adhesion","volume":"18","author":"Jones","year":"1994","journal-title":"Exp. Mycol."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"2397","DOI":"10.5897\/AJMR2014.6738","article-title":"Characterization of cellulase producing from Aspergillus melleus by solid state fermentation using maize crop residues","volume":"8","author":"Danmek","year":"2014","journal-title":"Afr. J. Microbiol. Res."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/11\/11\/2069\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:25:37Z","timestamp":1760196337000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/11\/11\/2069"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,10,23]]},"references-count":57,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2018,11]]}},"alternative-id":["ma11112069"],"URL":"https:\/\/doi.org\/10.3390\/ma11112069","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,10,23]]}}}