title: Removing organic contaminants with bifunctional iron modified rectorite as efficient adsorbent and visible light photo-Fenton catalyst.
abstract: Iron-modified rectorite (FeR) was prepared as both adsorbent and catalyst. The iron modification increased layer-to-layer spacing and surface area of rectorite, leading to much increased adsorption of Rhodamine B (RhB) on rectorite. The maximum adsorption capacity of RhB on FeR reached 101mgg(-1) at pH 4.5, being 11 folds of that on the unmodified one. The iron modification also enabled rectorite to have efficient visible light photocatalytic ability. The apparent rate constant for the degradation of RhB (80μM) at 298K and pH 4.5 in the presence of H(2)O(2) (6.0mM) and FeR (0.4gL(-1)) was evaluated to be 0.0413min(-1) under visible light and 0.122min(-1) under sunlight, respectively. The analysis with electron spin resonance spin-trapping technique supported that the iron modified rectorite effectively catalyzed the decomposition of H(2)O(2) into hydroxyl radicals. On the basis of the characterization and analysis, the new bifunctional material was well clarified as both adsorbent and photocatalyst in the removing of organic pollutants.
authors.affiliation: College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Zhao
authors.forename: Lihua
authors.initials: L
authors.lastname: Zhu
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jingchun
authors.initials: J
authors.lastname: Yan
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Lu
authors.forename: Yingping
authors.initials: Y
authors.lastname: Huang
authors.forename: Heqing
authors.initials: H
authors.lastname: Tang
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects; D007474:Ion Exchange; D007501:Iron / Q000737:chemistry*; D008027:Light; D008903:Minerals / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry* / Q000528:radiation effects; D014465:Ultrasonics; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods
chemical_list: D000538:Aluminum Silicates; D004396:Coloring Agents; D008903:Minerals; D012235:Rhodamines; D014874:Water Pollutants, Chemical; C546376:rectorite; D007501:Iron; C029773:rhodamine B