Ce-Zr-V-O complex oxide catalysts with different Ce/Zr molar ratio and V doping contents were prepared by co-precipitation method,and their catalytic performance for catalytic combustion of dichloromethane were evaluated in a conventional fixed bed reactor.The catalysts were characterized by BET,XRD,XPS and H2-TPR.The results showed that V and Ce-Zr formed Ce-Zr-V-O solid solution;V doping increased the surface area and pore size of the catalysts,and formed more lattice defects and activity sites,so the cat...