Ordered　mesoporous　γ-alumina　with　high　surface　area　and　large　pore　volume　has　been　successfully　synthesized　via　a　simple　sol-gel　method　using　urea　as　pore-enlarging　agent　and　acetic　acid　as　interfacial　protector.　The　boron　dopant　stabilizes　the　mesostructure　and　the　introduction　of　urea　enlarges　the　pore　volume,　which　effectively　improves　the　surface　area　and　thermal　stability　of　the　as-synthesized　ordered　mesoporous　alumina.　The　obtained　boron-doped　γ-alumina　prepared　with　urea　maintains　ordered　hexagonal　mesostructure　with　a　large　pore　size　(11.8　nm)　and　large　pore　volume　(0.88　cm3　g-1)　after　calcined　at　1000　°C,　indicating　its　excellent　performance　of　resistance　to　sintering　under　high　temperature.　©　2016　Elsevier　B.V.　All　rights　reserved.