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. 2013 Mar 7;3:1399. doi: 10.1038/srep01399

Figure 4. Fluorescence and photocatalytic properties of the semiconductor NP-NC hydrogels.

Figure 4

(a) The UV-Vis absorbance and PL spectra of the CdTe-NC hydrogel and the CdTe quantum dot solution with the same concentration of CdTe. (b–d) Images of three different CdTe-NC hydrogels under an ultraviolet lamp. The average diameters of the CdTe quantum dots are estimated to be 2.8 nm (b, green), 3.3 nm (c, yellow), and 4.0 nm (d, red). (e) The recyclable application of the TiO2-NC hydrogel for the treatment of polluted water and images of the TiO2-NC hydrogels at various stages are shown (the scale is 1 cm). (f) The amount of MB adsorbed by the TiO2-NC gel in the three reusing cycles.