title: Confirmation of hydroxyl radicals (•OH) generated in the presence of TiO2 supported on AC under microwave irradiation.
abstract: In order to study the degradation mechanism of technology of microwave (MW) combined with TiO2 supported on activated carbon (TiO2/AC), the reactive oxygen species (ROS) was explored through oxidation of 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). Furthermore, 2,6-di-tert-butyl-4-methylphenol (BHT), Mannitol (MT) and Vitamin C (VC) were used as radical scavengers to confirm the generation of the hydroxyl radicals ((•)OH). In addition, the influence of some parameters such as TiO2 mass ratio content, irradiation time, material dose, DPCI concentration and MW power on the determination of (•)OH were examined. The results showed that the (•)OH could be generated under MW combined with loaded TiO2/AC. Also, anatase TiO2/AC can generate more (•)OH radicals than rutile TiO2/AC under MW irradiation. This work would provide new mechanistic insights on the enhanced degradation effect of organic pollutants in water using the supported TiO2/AC coupled with MW technology.
authors: School of Environmental Science, Liaoning University, Shenyang 110036, China. Electronic address: lnuhjhx@163.com.
authors: Zhaohong
authors: Z
authors: Zhang
authors: School of Environmental Science, Liaoning University, Shenyang 110036, China.
authors: Fengyang
authors: F
authors: Yu
authors: School of Environmental Science, Liaoning University, Shenyang 110036, China.
authors: Lirong
authors: L
authors: Huang
authors: School of Environmental Science, Liaoning University, Shenyang 110036, China.
authors: Jianaerguli
authors: J
authors: Jiatieli
authors: School of Environmental Science, Liaoning University, Shenyang 110036, China.
authors: Yuanyuan
authors: Y
authors: Li
authors: School of Environmental Science, Liaoning University, Shenyang 110036, China.
authors: Lijun
authors: L
authors: Song
authors: Experiment Center of Environmental Monitoring of Liaoning Province, Shenyang 110161, China.
authors: Ning
authors: N
authors: Yu
authors: Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012, USA. Electronic address: dionysios.d.dionysiou@uc.edu.
authors: Dionysios D
authors: DD
authors: Dionysiou
mesh_terms: D000975:Antioxidants / Q000737:chemistry; D001205:Ascorbic Acid / Q000737:chemistry; D002084:Butylated Hydroxytoluene / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D004160:Diphenylcarbazide / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry*; D008353:Mannitol / Q000737:chemistry; D008872:Microwaves; D010084:Oxidation-Reduction; D012664:Semicarbazones / Q000737:chemistry; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D000975:Antioxidants; D012664:Semicarbazones; C009495:titanium dioxide; D002084:Butylated Hydroxytoluene; D004160:Diphenylcarbazide; D017665:Hydroxyl Radical; D008353:Mannitol; D002244:Carbon; C004844:diphenylcarbazone; D014025:Titanium; D001205:Ascorbic Acid
keywords: Active carbon; Degradation; Hydroxyl radicals ((•)OH); Loaded TiO(2); Microwave