Abstract
Gold-nanoparticles (Au-NPs) incorporated TiO2-nanowires (TiO2-NWs) of controlled sizes prepared via hydrothermal and chemical reduction method have been investigated for CO2 photoreduction with H2 under visible light irradiations. The nanocatalysts have been characterized by XRD, FESEM, TEM, N2 adsorption–desorption, XPS, UV–vis and PL spectroscopy. Highly crystalline TiO2 nanowires of mesoporous structure were obtained in Au-deposited TiO2 NWs. Au-NPs, uniformly distributed over TiO2-NWs as Au-metal state, hindered charges recombination rate and increased TiO2 activity under visible light through plasmon excitation. With the deposition of Au-NPs, the efficiency of CO2 reduction to CO was greatly enhanced under lower energy visible light irradiations. The maximum CO and CH3OH yield rate over 0.5wt.% Au-NPs/TiO2 NWs reached to 1237 and 12.65μmolegcatal.−1h−1, respectively. High quantum yield was also observed over Au-NPs/TiO2 NWs using H2 as reductant. The significantly improved photoactivity was evidently due to efficient electron–hole separation and surface plasmon response of Au-NPs. The reaction-pathway is proposed to provide insights over the mechanism of Au-plasmon-enhanced CO2 conversion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
