title: Layered double hydroxides as efficient photocatalysts for visible-light degradation of Rhodamine B.
abstract: A series of Zn/M-NO3-LDHs (M=Al, Fe, Ti, and Fe/Ti) have been synthesized by two different methods, and their activities for visible-light photocatalytic degradation on Rhodamine B (RB) were tested. Solids were analyzed by XRD, FT-IR, and ICP characterization, confirming the formation of pure LDH phase with good crystal structure. It was observed that the band gap of these nitrate LDH materials was following this order: Zn/Fe-NO3-LDHs (2.55 eV)>Zn/Fe/Ti-NO3-LDHs (2.88 eV)>Zn/Ti-NO3-LDHs (3.0 3eV)>Zn/Al-NO3-LDHs (3.23 eV); however, the degradation performance of RB by four materials followed the order: Zn/Ti-NO3-LDHs (98%)>Zn/Al-NO3-LDHs (96%)>Zn/Fe/Ti-NO3-LDHs (88%)>Zn/Fe-NO3-LDHs (72%). In addition, a possible mechanism for photocatalytic degradation on RB has also been presumed. Moreover, after three regeneration cycles, the percentage of RB degradation rate was still close to 90%.
authors.affiliation: College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, PR China.
authors.forename: Sheng-Jie
authors.initials: SJ
authors.lastname: Xia
authors.forename: Feng-Xian
authors.initials: FX
authors.lastname: Liu
authors.forename: Zhe-Ming
authors.initials: ZM
authors.lastname: Ni
authors.forename: Ji-Long
authors.initials: JL
authors.lastname: Xue
authors.forename: Ping-Ping
authors.initials: PP
authors.lastname: Qian
mesh_terms: D000535:Aluminum / Q000737:chemistry; D002384:Catalysis; D004396:Coloring Agents / Q000032:analysis / Q000302:isolation & purification*; D006878:Hydroxides; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry; D008027:Light; D010777:Photochemistry; D012235:Rhodamines / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013784:Textiles; D014025:Titanium / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D006878:Hydroxides; D007220:Industrial Waste; D012235:Rhodamines; D014874:Water Pollutants, Chemical; D000535:Aluminum; D014025:Titanium; D007501:Iron; D015032:Zinc; C029773:rhodamine B