Fig. 2From: Enhanced Photocatalytic Activity of the Carbon Quantum Dot-Modified BiOI MicrosphereThe TEM images of CQD/BiOI 1.5 wt.% sample (a, b). FT-IR spectra of pure BiOI and CQD/BiOI 1.5 wt.% samples (c). the XPS C 1s spectra of the CQD/BiOI 1.5 wt.% samples (d)Back to article page