Photocatalytic reduction of carbon dioxide over Cu/TiO2 photocatalysts
Jazyk angličtina Země Německo Médium print-electronic
Typ dokumentu časopisecké články
Grantová podpora
033RC003
Federal Ministry of Education and Research of Germany
PubMed
29285696
DOI
10.1007/s11356-017-0944-8
PII: 10.1007/s11356-017-0944-8
Knihovny.cz E-zdroje
- Klíčová slova
- CH4, CO2 reduction, Cu/TiO2, Photocatalysis,
- MeSH
- chemické modely MeSH
- difrakce rentgenového záření MeSH
- fotochemické procesy * MeSH
- katalýza MeSH
- měď chemie MeSH
- oxid uhličitý chemie MeSH
- Ramanova spektroskopie MeSH
- spektroskopie infračervená s Fourierovou transformací MeSH
- titan chemie MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- měď MeSH
- oxid uhličitý MeSH
- titan MeSH
- titanium dioxide MeSH Prohlížeč
The photocatalytic reduction of CO2 with H2O was investigated using Cu/TiO2 photocatalysts in aqueous solution. For this purpose, Cu/TiO2 photocatalysts (with 0.2, 0.9, 2, 4, and 6 wt.% of Cu) have been synthesized via sol-gel method. The photocatalysts were extensively characterized by means of inductively coupled plasma optical emission spectrometry (ICP-OES), N2 physisorption (BET), XRD, UV-vis DRS, FT-IR, Raman spectroscopy, TEM-EDX, and photoelectrochemical measurements. The as-prepared photocatalysts contain anatase as a major crystalline phase with a crystallite size around 13 nm. By increasing the amount of Cu, specific surface area and band gap energy decreased in addition to the formation of large agglomeration of CuO. Results revealed that the photocatalytic reduction of CO2 decreased in the presence of Cu/TiO2 in comparison to pure TiO2, which might be associated to the formation of CuO phase acting as a recombination center of generated electron-hole pair. Decreasing of photoactivity can also be connected with a very low position of conduction band of photocatalysts with high Cu content, which makes H2 production necessary for CO2 reduction more difficult.
