Pretreating of CC with NH3·H2 O and coating of TiO_2 with semi-in-situ sol-gel method over CC-A were propitious to low-temperture catalytic performance of NH3-SCR over monolith catalyst Mn-Ce/( CC-A) @ 12 TiO2,with above 90% conversion of NOxduring 80 ~ 260 ℃. Results of N2-adsorption/desorption,XRD and DSC indicated that TiO_2 mainly existed in intact anatase crystalline which accelerated the generation of labile oxygen species with contribution to activity. SEM images demonstrated that threedimensional st...