A facile strategy to fabricate plasmonic Cu modified TiO{sub 2} nano-flower films for photocatalytic reduction of CO{sub 2} to methanol

Journal Article · Sat Aug 15 04:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.03.064· OSTI ID:22475846

Liu, Enzhou; Qi, Lulu; Bian, Juanjuan; Chen, Yihan ^[1]; Hu, Xiaoyun ^[2]; Fan, Jun ^[1]; Liu, Hanchen; Zhu, Changjun; Wang, Qiuping ^[3]

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1. School of Chemical Engineering, Northwest University, No. 229 Taibai North Road, Xi’an 710069 (China)
2. Department of Physics, Northwest University, No. 229 Taibai North Road, Xi'an 710069 (China)
3. School of Science, Xi'an Polytechnic University, No. 19 Jinhua South Road, Xi’an 710048 (China)

Graphical abstract: Photoreduction of CO{sub 2} to CH{sub 3}OH over plasmonic Cu/TiO{sub 2} film. - Highlights: • Cu nanoparticles modified TiO{sub 2} nano-flower film was prepared by a facile strategy. • Cu nanoparticles can enhance the light absorption and the Raman scattering of TiO{sub 2}. • Cu nanoparticles can effectively restrain the recombination of the charge carriers. • A synergistic mechanism is proposed for photocatalytic reduction of CO{sub 2} on Cu/TiO{sub 2} film. - Abstract: Cu nanoparticles (NPs) deposited TiO{sub 2} nano-flower films were fabricated using a combination of a hydrothermal method and a microwave-assisted reduction process. The investigations indicated that Cu NPs and TiO{sub 2} film both exhibit visible light harvesting properties based on localized surface plasmon resonance (LSPR) of Cu NPs and unique nanostructures of TiO{sub 2} film. Fluorescence quenching was observed because the recombination of charge carriers was effectively suppressed by Cu NPs deposition. The experimental results indicate that Cu/TiO{sub 2} films exhibit better activity for the photocatalytic reduction of CO{sub 2} due to the charge transfer property and LSPR effect of Cu NPs. The CH{sub 3}OH production rate reached 1.8 μmol cm{sup −2} h{sup −1} (energy efficiency was 0.8%) over 0.5 Cu/TiO{sub 2} film under UV and visible light irradiation, which was 6.0 times higher than that observed over pure TiO{sub 2} film. In addition, a tentative photocatalytic mechanism is proposed to understand the experimental results over the Cu modified TiO{sub 2} nano-flower films.

• OSTI ID: 22475846
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 68; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
CARBON DIOXIDE
CHARGE CARRIERS
COPPER ADDITIONS
DEPOSITION
FLUORESCENCE
HYDROTHERMAL SYNTHESIS
METHANOL
NANOPARTICLES
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOCATALYSIS
RAMAN EFFECT
RECOMBINATION
REDUCTION
THIN FILMS
TITANIUM OXIDES
VISIBLE RADIATION