I personally don't raise them, but from my reading BrianS does... For Tityus serrulatus and most other Tityus he typically sets up a Gladware plastic box with moist peat, tree bark and a soda bottle cap for water. Hope this gets you in the right direction...
Here is a Quote from "Ythier" from somewhere else...
"Most of the Tityus spp need cool temperatures (I mean not to warm, 25°C is more than enough) and an extremely well ventilated tank (or not too much humid). I've lost a lot of specimens in the past keeping them too much warm and humid, but in the forest, temperature is moderate, and as they leave in the trees, the air is humid but very well ventilated. I recently tried to keep a group of stigmurus in very humid and bad ventilated tanks (some small holes), and another one on totally dry peat (only one pulverization in a corner per week), in very well ventilated tanks (wire netting): 50% of (unexplained) deaths in the 1st group, all alive in the 2nd one. I've also keep too gravid females in different conditions : the 1st one quite warm (30°C L, 27°C D), the other one cooler (23°C L, 20°C D), the 1st one had a gestation of 2 months and gave birth to 6 babies, the second one gave birth to 28 babies after 4 months.
Well, just some observations, if it can help..