. As shown in Fig. 1(b), obvious shift in the XRD peaks for Bi1xFexOCl photocatalysts is observed, due to the smaller radius of Fe3+ (0.65 Å) than that of Bi3+ (1.03 Å). This implies that Fe3+ cations were incorporated into the BiOCl lattice, and Bi1xFexOCl solid solutions were successfully synthesized by the combustion method.