Bluff now or later?

[emil3000]

Opponent is too loose and seems too passive. earlier he limped UTG with q9off, checkcalled a 952 twotone flop, checked the turn and checked the river when he hit his Q.
Stats are 42/9/0.75 after few hands.

He raises to $15 UTG, I call in CO with 9Ts, BB calls.

Flop is JQ4, rainbow. He bets 26 into the $47 pot. I think about raising but just call. BB folds.

Turn is a blank. He checks. Bet now, or hope to bluff when I inevitably miss the river?