Carbon Dot Functionalized Papers for the Selective Detection of 2,4,6-Trinitrophenol in Aqueous Solutions

Figure 3

(a) FT-IR spectra of the CDs. (b) XPS survey of CDs. The high resolution of C 1s (c) and O 1s (d) spectra of the CDs.

(a)

(b)

(c)

(d)