Applied Catalysis B: Environmental, volume 37, issue 1, pages 37-48
Photoreduction of CO2 using sol–gel derived titania and titania-supported copper catalysts
Publication type: Journal Article
Publication date: 2002-04-01
Journal:
Applied Catalysis B: Environmental
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 22.1
ISSN: 09263373, 18733883
Catalysis
Process Chemistry and Technology
General Environmental Science
Abstract
Carbon dioxide was photocatalytically reduced to produce methanol in an aqueous solution using 254 nm UV irradiation. Titania and Cu-loaded titania were synthesized by an improved sol–gel method using a homogeneous hydrolysis technique. The grain size of TiO 2 and Cu/TiO 2 were uniform and average diameters were approximately 20 nm. Photocatalytic reduction was conducted in a quartz reactor with a UV lamp irradiating at the center. XPS analysis reveals that Cu 2p 3/2 is 933.4 eV indicating primary Cu 2 O species on the TiO 2 supports. EDX and XPS revealed that most copper clusters were on the TiO 2 surface. The optimum amount of copper loading was 2.0 wt.% for the highest dispersion among catalysts. The methanol yield of 2.0 wt.% Cu/TiO 2 was 118 μmol/g following 6 h of UV illumination. The yield was much higher than those of sol–gel TiO 2 and Degussa P25, whose yields were 4.7 and 38.2 μmol/g, respectively. The methanol yield reached a steady-state 250 μmol/g after 20 h of irradiation. Experimental results indicated that the methanol yield was significantly increased by adding NaOH. The caustic solution dissolved more CO 2 than did pure water. In addition, the OH − in aqueous solution also served as a strong hole scavenger. The redistribution of the electric charge and the Schottky barrier of Cu and TiO 2 facilitates electron trapping via supported Cu. The photocatalytic efficiency of Cu/TiO 2 was markedly increased because of the lowering the re-combination probability for hole–electron pairs. The highest quantum and energy efficiencies achieved were 10 and 2.5%, respectively.
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Tseng I., Chang W., Wu J. K. Photoreduction of CO2 using sol–gel derived titania and titania-supported copper catalysts // Applied Catalysis B: Environmental. 2002. Vol. 37. No. 1. pp. 37-48.
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Tseng I., Chang W., Wu J. K. Photoreduction of CO2 using sol–gel derived titania and titania-supported copper catalysts // Applied Catalysis B: Environmental. 2002. Vol. 37. No. 1. pp. 37-48.
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TY - JOUR
DO - 10.1016/S0926-3373(01)00322-8
UR - https://doi.org/10.1016/S0926-3373(01)00322-8
TI - Photoreduction of CO2 using sol–gel derived titania and titania-supported copper catalysts
T2 - Applied Catalysis B: Environmental
AU - Tseng, I-Hsiang
AU - Chang, Wan-Chen
AU - Wu, Jeffrey K.
PY - 2002
DA - 2002/04/01 00:00:00
PB - Elsevier
SP - 37-48
IS - 1
VL - 37
SN - 0926-3373
SN - 1873-3883
ER -
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@article{2002_Tseng,
author = {I-Hsiang Tseng and Wan-Chen Chang and Jeffrey K. Wu},
title = {Photoreduction of CO2 using sol–gel derived titania and titania-supported copper catalysts},
journal = {Applied Catalysis B: Environmental},
year = {2002},
volume = {37},
publisher = {Elsevier},
month = {apr},
url = {https://doi.org/10.1016/S0926-3373(01)00322-8},
number = {1},
pages = {37--48},
doi = {10.1016/S0926-3373(01)00322-8}
}
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Tseng, I-Hsiang, et al. “Photoreduction of CO2 using sol–gel derived titania and titania-supported copper catalysts.” Applied Catalysis B: Environmental, vol. 37, no. 1, Apr. 2002, pp. 37-48. https://doi.org/10.1016/S0926-3373(01)00322-8.
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