pp. 993-1001
S&M1136 Research Paper of Special Issue https://doi.org/10.18494/SAM.2015.1171 Published: November 11, 2015 Enhanced Photocatalytic Activity of TiO2–CNT Composites for Photoreduction of CO2 [PDF] Kim-Yang Lee, Abdul Rahman Mohamed and Kazunori Sato (Received February 16, 2015; Accepted May 26, 2015) Keywords: photocatalysis, photocatalytic reduction of CO2, TiO2–CNT composite, titanium dioxide
In this work, we present a facile and dopant-free approach using a peroxo-titanium complex as a precursor to synthesize TiO2–carbon nanotube (CNT) composites at various CNT loadings, ranging from 0 to 10 wt% (gram CNT per unit gram of TiO2). The photocatalytic activity of as-synthesized composites on CO2 reduction was studied. The as-synthesized composites were characterized by X-ray diffraction (XRD) and UV–visible spectroscopy. XRD analysis revealed that the as-produced TiO2 was a mixture of anatase and rutile phase TiO2. UV–vis spectra showed that the absorption edge of the as-synthesized composites was redshifted and exhibited an improvement in light absorbance as compared with the commercially available anatase TiO2. Among the synthesized TiO2–CNT composites, TiO2–CNT with 5 wt% CNT loading showed the highest photocatalytic activity on CO2 reduction. A possible reaction mechanism for the photoreduction of CO2 was proposed.
Corresponding author: Abdul Rahman Mohamed, Kazunori SatoCite this article Kim-Yang Lee, Abdul Rahman Mohamed and Kazunori Sato, Enhanced Photocatalytic Activity of TiO2–CNT Composites for Photoreduction of CO2, Sens. Mater., Vol. 27, No. 10, 2015, p. 993-1001. |