title: Detection of reactive oxygen species (ROS) generated by TiO2(R), TiO2(R/A) and TiO2(A) under ultrasonic and solar light irradiation and application in degradation of organic dyes.
abstract: In the present work, the rutile, anatase and mixed (rutile and anatase) crystal phase TiO(2) powders were irradiated by ultrasound and solar light, respectively, and the generation of reactive oxygen species (ROS) were detected through the oxidation reaction from 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). The DPCO can be extracted by the mixed solvent of benzene and carbon tetrachloride and the extract liquors display an obvious absorption peak around 563nm. In addition, the influences of (ultrasonic or solar light) irradiation time, TiO(2) addition amount and DPCI concentration on the quantities of generated ROS were also reviewed. The kinds of generated ROS were determined by using several radical scavengers. At last, the researches on the sonocatalytic and photocatalytic degradation of several organic dyes were also performed. It is wished that this paper might offer some important subjects for broadening the applications of sonocatalytic and photocatalytic technologies.
authors.affiliation: College of Chemistry, Liaoning University, Shenyang 110036, PR China.
authors.forename: Yuwei
authors.initials: Y
authors.lastname: Guo
authors.forename: Chunping
authors.initials: C
authors.lastname: Cheng
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Zhiqiu
authors.initials: Z
authors.lastname: Wang
authors.forename: Xudong
authors.initials: X
authors.lastname: Jin
authors.forename: Kai
authors.initials: K
authors.lastname: Li
authors.forename: Pingli
authors.initials: P
authors.lastname: Kang
authors.forename: Jingqun
authors.initials: J
authors.lastname: Gao
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; D009930:Organic Chemicals; D017382:Reactive Oxygen Species; C009495:titanium dioxide; D014025:Titanium