title: Interstratified nanohybrid assembled by alternating cationic layered double hydroxide nanosheets and anionic layered titanate nanosheets with superior photocatalytic activity.
abstract: Oppositely charged 2D inorganic nanosheets of ZnAl-layered double hydroxide and layered titanate were successfully assembled into an interstratified nanohybrid through simply mixing the corresponding nanosheet suspensions. Powder X-ray diffraction and high-resolution transmission electron microscope clearly revealed that the component nanosheets in the as-obtained nanohybrid ZnAl-Ti3O7 retain the 2D sheet skeletons of the pristine materials and that the two kinds of nanosheets are well arranged in a layer-by-layer alternating fashion with a basal spacing of about 1.3 nm, coincident with the thickness summation of the two component nanosheets. The effective interfacial heterojunction between them and the high specific surface area resulted in that the nanohybrid exhibits a superior photocatalytic activity in the degradation of methylene blue with a reaction constant k of 2.81 × 10(-2)min(-1), which is about 9 and 4 times higher than its precursors H2Ti3O7 and ZnAl-LDH, respectively. Based on UV-vis, XPS and photoelectrochemical measurements, a proposed photoexcitation model was provided to understand its photocatalytic behavior.
authors.affiliation: Fujian Key Laboratory of Functional Materials, College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, PR China. Electronic address: bzlin@hqu.edu.cn.
authors.forename: Bizhou
authors.initials: B
authors.lastname: Lin
authors.affiliation: Fujian Key Laboratory of Functional Materials, College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Sun
authors.affiliation: Fujian Key Laboratory of Functional Materials, College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Fujian Key Laboratory of Functional Materials, College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, PR China.
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Jiang
authors.affiliation: Fujian Key Laboratory of Functional Materials, College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, PR China.
authors.forename: Bifen
authors.initials: B
authors.lastname: Gao
authors.affiliation: Fujian Key Laboratory of Functional Materials, College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, PR China.
authors.forename: Yilin
authors.initials: Y
authors.lastname: Chen
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry; D008751:Methylene Blue; D049329:Nanostructures / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry*; D009584:Nitrogen; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D017607:Aluminum Compounds; D002254:Carbonates; D009566:Nitrates; D014874:Water Pollutants, Chemical; D017967:Zinc Compounds; C009495:titanium dioxide; C005686:sodium carbonate; D014025:Titanium; C042103:zinc nitrate; C050609:aluminum nitrate; D009584:Nitrogen; D008751:Methylene Blue
keywords: Interstratified nanohybrid; Layered double hydroxide; Nanosheets; Photocatalysis; Titanate