Tss, you guys are seeing plot holes everywhere..
-> Hollows disappeared only when they are purified by a Shinigami zanpakutou
( for exemple, one of the Hollow sliced by Ichigo in the beginning of the manga did not disappeared because he was sent to the Hell world and was not purified )
-> Starrk spiritual pressure can kill simple hollows right away, but the vice-captains are a completly different level.
( Even the little girl soul and the strawhat Shinigami at the very beginning of the battle could stand the pressure of everybody from the battlefield )
Though I must admit that the black hole thing was a little cheating
But well, even if you apply logical physic, he must have shadow on the interior of his hole and so enough black for being cut by Shunsui attack