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. 2017 May 31;7(6):130. doi: 10.3390/nano7060130

Figure 1.

Figure 1

(A) UV-vis-NIR absorption of as-prepared carbon quantum dots (CQDs) in water and CQDs/TiO2 on fluorine-doped tin oxide (FTO) glass. Insets are photos of the CQDs aqueous solution and CQDs/TiO2-coated photoanode; (B) PL spectra of CQDs in water and CQDs/TiO2 on FTO glass, excited at 440 nm; (C) FTIR spectra of solid CQDs, TiO2- and CQDs/TiO2-coated FTO glass; (D) XRD pattern of solid CQDs and CQDs/TiO2-coated FTO glass.