Bismuth oxyhalide and its composite belong to a new family of visible light driven photocatalysts and attract more and more attention because of their interesting structures dependent on the photocatalytic performance arisen from their layered structures interleaved with [Bi2O2] slabs and double halogen atoms slabs. An effective and simple strategy to improve the photocatalytic activity of a photocatalyst is the construction of a heterostructure, as the heterojunction has great potential in tuning the desired electronic properties of the composite photocatalysts and efficiently separating the photogenerated electron-hole pairs. This is the first report that a series of BiOxCly/BiOmBrn heterojunctions are prepared using controlled hydrothermal methods. The compositions and morphologies of BiOxCly/BiOmBrn could be controlled by adjusting some growth parameters, including reaction pH, time, and temperature. The products are characterized by XRD, SEM-EDS, HR-TEM, DR-UV, BET, CL, and HR-XPS. (C) 2014 Elsevier B.V. All rights reserved.