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. 2019 Aug 28;10(42):9801–9806. doi: 10.1039/c9sc03492g

Fig. 2. (a) The powder XRD pattern, (b) a TEM image of the W-CNQDs after ultrasonic dispersion in water, (c) elemental mapping images, (d) the XPS survey spectrum and (e) C 1s, (f) N 1s, and (g) O 1s spectra, (h) the FT-IR spectrum, and (i) the solid 13C NMR spectrum of the W-CNQDs.

Fig. 2