Recently, carbon quantum dots have become the best candidates for photocatalyst activities due to their abundant functional groups, fluorescent properties, and high active sites on their surface. Since quantum dots are homogeneous, they cannot be separated from the reaction solution after the end of the reaction and therefore cannot be reused, which limited their applications [1]. In this work, a new nanocomposite resulting from the coating of Cl-CQDs [2] on the surface of NiFe2O4 [3] particles, was synthesized by the convenient co-precipitation method [4]. The Cl-CQDs/NiFe2O4 nanocomposite was characterized by VSM, TGA, EDX, XRD, UV-Vis, FT-IR, and PL techniques. All of them confirm the successful synthesis of this nanocomposite [4]. Decreased value of MS in Cl-CQDs/NiFe2O4 versus NiFe2O4 is mainly due to the presence of Cl-CQDs, which is a non-magnetic substance. In spite of the fact that the value of MS decreased but the nanocomposite expresses considerable magnetic properties that provide facile separation of catalyst from the reaction solution by an external magnet, which makes it a good candidate as a photocatalyst.
