Biogenic N-P-codoped TiO2: synthesis, characterization and photocatalytic properties.
Four typical kinds of crop seeds are studied as non-metallic bio-precursors to synthesize biogenic N-P-codoped TiO(2) (BNP-TiO(2)). The as-prepared BNP-TiO(2) samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen-adsorption measurement and UV-Vis spectroscopy. The results show that BNP-TiO(2) possesses single anatase phase with mesopore structures, and nitrogen and phosphorus contained in original crop seeds are self-doped into the lattice as anions and cations, respectively. Besides, BNP-TiO(2) exhibits a strongly enhanced absorption in the UV-Vis light range and red shift of the absorption edge, implicating the highly efficient light-harvesting capacity and sensitization towards visible light. Furthermore, experiments of crystal violet degradation under Xe lamp irradiation indicate superior photocatalytic activity of BNP-TiO(2), of which the degradation rate is almost three times that of common TiO(2). Circled photocatalytic degradation also shows good photocatalytic stability of BNP-TiO(2). This work may pave a new and facile pathway of utilizing discarded biomass to synthesize desirable element-doped metal oxides based on biomass precursors.
Han
Ting
T
State Key Laboratory of Composites, Shanghai Jiaotong University, 200240 Shanghai, PR China.
Fan
Tongxiang
T
Chow
Suk-Kwun
SK
Zhang
Di
D
D002384:Catalysis; D009584:Nitrogen / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D010777:Photochemistry; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
C009495:titanium dioxide; D010758:Phosphorus; D014025:Titanium; D009584:Nitrogen