Square-like　B　doped　TiO2　nanocrystals　were　first　synthesized　by　a　mild　solvothermal　method　with　H3BO4　and　titanium　isopropoxide　as　the　precursors,　and　isopropyl　alcohol　as　reaction　medium.　Then,　Ag　nanoparticles　were　deposited　on　TiO2-B　nanosquares　by　photo-deposition.　The　as-synthesized　products　have　been　investigated　by　photocatalytic　reaction　test　and　characterized　by　powder　X-ray　diffraction　(XRD),　transmission　electron　microscopy　(TEM),　X-ray　photoelectron　spectroscopy　(XPS),　and　UV-vis　diffuse　reflectance　spectra　(DRS).　The　results　showed　that　boron　was　successfully　doped　into　TiO2　nanosquares　under　solvothermal　condition.　The　obtained　Ag/TiO2-B　composite　showed　high　efficiency　in　degradation　of　acid　orange　II　under　visible　light　irradiation.　The　high　photocatalytic　performance　could　be　attributed　to　the　synergistic　effect　of　B　doping　and　the　plasmon　photocatalysis　role　of　the　deposited　silver　nanoparticles　over　TiO2.　©　2013　Elsevier　B.V.　All　rights　reserved.