Photocatalytic reduction of carbon dioxide to methanol and formic acid by graphene-TiO₂

Figures & data

Figure 1. Infrared spectra of various catalysts.

Figure 2. XRD patterns of various catalysts.

Figure 3. TEM images of GN-TiO₂.

Figure 4. UV-Vis spectra of the TiO₂ catalysts.

Table 1. Surface areas, pore volumes, and pore widths of various GN-TiO₂ samples

Sample	Specific surface area (m^2 g^−1)	Total pore volume (cm^3 g^−1)	Average pore width (nm)
2.21% TiO2-GN	64.92	0.38	23.74
8.50% TiO2-GN	101.05	0.29	11.53
16.39% TiO2-GN	115.84	0.24	8.29

Figure 5. N₂ adsorption-desorption isotherms of the catalysts.

Figure 6. Photocatalytic reduction of carbon dioxide by the various catalysts.

Figure 7. Photocatalytic reduction of carbon dioxide under various pH.

Figure 8. The mechanism of carbon dioxide reduction.