title: Controllable solvothermal synthesis and photocatalytic properties of complex (oxy)fluorides K2TiOF4, K3TiOF5, K7Ti4O4F7 and K2TiF6.
abstract: Complex (oxy)fluorides K(2)TiF(6), K(2)TiOF(4), K(3)TiOF(5) and K(7)Ti(4)O(4)F(7) have been successfully synthesized for the first time through a controllable solvothermal route involving different solvents, for example, methanol, methanol-H(2)O and methanol-H(2)O(2). The as-prepared products were characterized by X-ray powder diffraction, N(2) surface area adsorption, scanning electron microscope, Fourier transform infrared spectroscopy, UV-vis absorption spectra and X-ray fluorescence. The influences of reaction conditions such as the ratio of methanol to H(2)O(2) or methanol to H(2)O, reaction temperature on the phase, crystallizability and purity of the (oxy)fluorides products were discussed in detail. Meanwhile, the photocatalytic behaviors of the as-prepared K(2)TiF(6), K(2)TiOF(4), K(3)TiOF(5) and K(7)Ti(4)O(4)F(7) were evaluated by degradation of rhodamine B molecules, and the results showed that all of the products possessed photocatalytic activities in the order of K(2)TiOF(4)>K(2)TiF(6)>K(7)Ti(4)O(4)F(7)>K(3)TiOF(5) at room temperature under the UV light.
authors: Division of Nanomaterials and Nanochemistry, Hefei National Laboratory for Physical Sciences at Microscale, Hefei, Anhui 230026, PR China; Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors: Jie
authors: J
authors: Sheng
authors: Kaibin
authors: K
authors: Tang
authors: Wei
authors: W
authors: Cheng
authors: Junli
authors: J
authors: Wang
authors: Yanxiang
authors: Y
authors: Nie
authors: Qing
authors: Q
authors: Yang
mesh_terms: D000327:Adsorption; D002384:Catalysis; D005459:Fluorides / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D012235:Rhodamines / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013696:Temperature; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014965:X-Rays
chemical_list: D012235:Rhodamines; D012997:Solvents; D014867:Water; D006861:Hydrogen Peroxide; D014025:Titanium; C029773:rhodamine B; D009584:Nitrogen; D005459:Fluorides; D000432:Methanol