TY - JOUR
T1 - Photocatalytic reduction of CO2 on copper-doped Titania catalysts prepared by improved-impregnation method
AU - Slamet,
AU - Nasution, Hosna W.
AU - Purnama, Ezza
AU - Kosela, Soleh
AU - Gunlazuardi, Jarnuzi
N1 - Funding Information:
The main financial support from Indonesian Petroleum and Gas Corporation (PERTAMINA), Grant No. 3230/10000/97-SO is highly acknowledged. The authors also would like to thank the Osaka Gas Foundation of International Culture Exchange (OGFICE) Japan for their part in financially supporting this research.
PY - 2005/5
Y1 - 2005/5
N2 - Photocatalytic reduction of CO2 by copper-doped titania catalysts has been investigated. The photocatalysts with various copper species (Cu0, CuI, CuII) were prepared by an improved-impregnation method, where copper nitrate is doped into TiO2 Degussa-P25. It is likely that copper present on the catalyst surface and the grain size of copper-titania catalysts is uniform, with crystallite size approximately 23 nm. The dispersion capacity of CuO in the vacant sites of TiO2 is about 4.16 Cu2+ nm-2(≈2.2 wt% of cu), as indicated by XRD analysis. The activation energy (Ea) for Degussa-P25 and 3%CuO/TiO2 is ca. +26 and +12 kJ/mol, respectively. These Ea values suggest that the desorption event is a rate limiting step, and the lower Ea of 3%CuO/TiO2 may suggest a catalytic role of copper species that enhance the methanol production.
AB - Photocatalytic reduction of CO2 by copper-doped titania catalysts has been investigated. The photocatalysts with various copper species (Cu0, CuI, CuII) were prepared by an improved-impregnation method, where copper nitrate is doped into TiO2 Degussa-P25. It is likely that copper present on the catalyst surface and the grain size of copper-titania catalysts is uniform, with crystallite size approximately 23 nm. The dispersion capacity of CuO in the vacant sites of TiO2 is about 4.16 Cu2+ nm-2(≈2.2 wt% of cu), as indicated by XRD analysis. The activation energy (Ea) for Degussa-P25 and 3%CuO/TiO2 is ca. +26 and +12 kJ/mol, respectively. These Ea values suggest that the desorption event is a rate limiting step, and the lower Ea of 3%CuO/TiO2 may suggest a catalytic role of copper species that enhance the methanol production.
KW - CO
KW - Copper
KW - Photocatalytic reduction
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=17344364106&partnerID=8YFLogxK
U2 - 10.1016/j.catcom.2005.01.011
DO - 10.1016/j.catcom.2005.01.011
M3 - Article
AN - SCOPUS:17344364106
SN - 1566-7367
VL - 6
SP - 313
EP - 319
JO - Catalysis Communications
JF - Catalysis Communications
IS - 5
ER -