In this study, a nano-diamond modified beta-PbO2 electrode with the efficiently electrochemical performance was successfully prepared by electrodeposition method (marked as Ti/SnO2-Sb/PbO2-ND). Chronoamperometric curves for PbO2 deposition reveals that the addition of nano-diamond particles could promote the growth of beta-PbO2 crystallites. This can be ascribed to the enhancement in the electrochemical generation of (OH)-O-center dot in the presence of nano-diamond. Additionally, the presence of nano-diamond could effectively improve the electromigration of Pb2+ toward the anode surface by the formation of negatively charged [Pb2+-nano-diamond] complex. The optimum doping concentration of nano-diamond for beta-PbO2 preparation was 1.5 g/L. As compared with blank beta-PbO2 electrode, Ti/SnO2-Sb/PbO2-1.5ND electrode has smaller grain size, more compact film and higher ratio of Oad/(O-ad+O-L). The electrochemical active area for Ti/SnO2-Sb/PbO2-1.5ND electrode was increased to 4.55 cm(2), while it was only 2.73 cm(2) for beta-PbO2 electrode. Notably, the oxygen evolution overpotential of Ti/SnO2-Sb/PbO2-1.5ND electrode was approximately 2.1 V/SCE, which was higher than blank beta-PbO2 electrode (1.81 V/SCE). The almost complete removal of methylene blue could be attained within 60 min at a current density of 30 mA cm(-2). Generally, the Ti/SnO2-Sb/PbO2-1.5ND shows promise as an efficient and low-cost electrode for electrochemical treatment of industrial wastewater. (C) 2019 The Electrochemical Society.