Fig. 2From: Functionalization of hydroxyapatite derived from cockle (Anadara granosa) shells into hydroxyapatite–nano TiO2 for photocatalytic degradation of methyl violetXRD pattern of (a) HAp-nTiO2, (b) HAp, and (c) CaO derived from Cockle shell (d) nano-TiO2Back to article page