Effect of reduced graphene oxide load into TiO2 P25 on the generation of reactive oxygen species in a solar photocatalytic reactor. Application to antipyrine degradation

•Effects of rGO on TiO2 band gap and absorption were studied.•The ROS generation by solar TiO2 and TiO2/rGO was discussed.•Antipyrine solar degradation-ROS generation relation was evaluated.•TiO2 holes were also found to be responsible primary species.