Sulaimon drained six 3-pointers while Mason Plumlee (19 points, seven rebounds), Seth Curry (13), Amile Jefferson and Quinn Cook (11 each) also played big roles for Duke (17-2, 4-2 ACC), which rebounded from a Wednesday loss to Miami-Florida.
The victory enabled the Blue Devils to remain unbeaten at home this season.
Maryland (15-5, 3-4) was led by Charles Mitchell and Dez Wells with 13 points each.
Alex Len helped out with eight points and 10 rebounds in the Terrapins' loss.
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