Preparation of magnetic g-C3N4/Fe3O4/TiO2 photocatalyst for visible light photocatalytic application

High Performance Magnetically Separable G‐C3N4/γ‐Fe2O3/TiO2 Nanocomposite with Boosted Photocatalytic Capability towards the Cefixime Trihydrate Degradation under Visible‐Light

“…As it is obvious in the TEM images, the mean sizes of the γ-Fe 2 O 3 and TiO 2 particles were measured to be around 15-18 nm. Interestingly, the observed lattice fringe of about 0.35 nm, could be attributed to the (1 0 1) planes in the anatase phase of TiO 2 [50] ( Figure 7e). The N 2 adsorption-desorption isotherm and the BJH pore size distribution plot of the photocatalyst are shown in Figure 8.…”

“…The peak observed at 284.6 eV could be assigned to the adventitious CÀ C bonds. [50] The signal observed at 285.9 eV is associated with the NÀ C sp2 bonds. [51] Two other peaks at 288.3 and 289.5 eV are emanated from the sp 2 -hybridized C atoms bonded to N in an aromatic ring [N=CÀ (N) 2 ], and sp 2 -hybridized C atoms in the aromatic rings bonded to the primary and secondary amines [N=C(N)À NH 2 , N=C(N)À NH], respectively.…”

“…[26,52,53] As shown in Figure 2d, the high-resolution XPS spectra of O 1s of the catalyst exhibits two peaks at 529.7 eV (due to the TiO 2 or γ-Fe 2 O 3 lattice oxygen atoms) and 531.2 eV (due to the OH groups or H 2 O molecules absorbed on the catalyst surface). [2,26,50] In the Ti 2p spectrum of the catalyst (Figure 2e), two strong peaks with binding energies of about 458.4 and 464.2 eV, which are respectively relating to Ti 2p 3/2 and Ti 2p 1/2 , could be assigned to Ti 4 + in the TiO 2 lattice. [2,50] The highresolution XPS spectra of Fe 2p (Figure 2f) illustrate four dominant peaks including Fe 2p 3/2 at 710.3 and 712.4 eV, along with Fe 2p 1/2 at 724.0 and 725.5 eV, which evidence the existence of Fe 3 + .…”

“…[2,26,50] In the Ti 2p spectrum of the catalyst (Figure 2e), two strong peaks with binding energies of about 458.4 and 464.2 eV, which are respectively relating to Ti 2p 3/2 and Ti 2p 1/2 , could be assigned to Ti 4 + in the TiO 2 lattice. [2,50] The highresolution XPS spectra of Fe 2p (Figure 2f) illustrate four dominant peaks including Fe 2p 3/2 at 710.3 and 712.4 eV, along with Fe 2p 1/2 at 724.0 and 725.5 eV, which evidence the existence of Fe 3 + . [54][55][56][57] The fitted Fe 2p 3/2 peak at 710.3 eV, can be allocated to Fe 3 + state in the TiÀ OÀ Fe bond.…”

“…[33,58] The appearance of the characteristic peaks at around 25.3°, 37.8°, 48.2°, 54.2°, 55.3°, 62.5°, and 70.4°(2θ) corresponding to the (1 0 1), (0 0 4), (2 0 0), (1 0 5), (2 1 1), (2 0 4) and (2 2 0) plane diffractions, confirms the anatase phase formation of TiO 2 (JCPDS card No. 21-1272) [50] in the g-…”