Batman lures the Hulk into a custom designed electromagnetic levitation cell. Hulk is purely physical, if he can’t touch the walls or floor, he can’t move and he can flail all he wants as he rotates helplessly in the middle of the EM chamber.

As long as it has power, Hulk is neutralized.

Edit: As @HessiaNerd mentions below, Hulk Thunderclap. I don’t know if Hulk is immune to vacuum but if he is then that might counter thunderclap. If he’s not immune to vacuum then Batman would not use this as you know, ‘no killing’.