Layered bimetallic oxide composite film: A highly efficient and reusable photocatalytic film for removal of tetracycline antibiotics

Construction of an MIL-101(Fe)/layered bimetallic oxide heterojunction for enhanced ciprofloxacin removal

“…3E) belonged to Zn 2+ 2p 3/2 and 2p 1/2 , respectively. 29 The binding energies of Cr 2p 3/2 and 2p 1/2 were 576.55 and 586.19 eV, respectively, indicating the presence of trivalent Cr 3+ (Fig. 3F).…”

“…The three peaks observed at T 1 (182.03 eV), T 2 (184.78 eV), and T 3 (190.47 eV) for Zr 4+ may be attributed to the bonding of Zr with O, Zn, and Fe. 29…”

“…In this work, the LBMOs were prepared according to the reported hydrothermal reaction method. 29 Briefly, Zn(NO 3 ) 2 ·6H 2 O, Cr(NO 3 ) 3 ·9H 2 O and ZrCl 4 were dissolved in 40 mL of water, and the aqueous solution was adjusted using the mixed solution of NaOH (1.92 mol L −1 ) and Na 2 CO 3 (0.60 mol L −1 ) to a solution pH of 9–10. After that, the mixture solution was transferred to a reaction vessel to construct LBMOs at 120 °C for 24 h. The prepared LBMOs were denoted as ZnCrZr-LBMO.…”

“…24 Therefore, many photocatalytic degradation methods for CIP removal have been developed by utilizing various novel photocatalytic materials such as C-F@CCS@ZIF8/67-1/1, 18 Bi 2 MoO 6 /UiO-66-NH 2 , 19 BiOCl/Cu-doped Bi 2 S 3 , 20 Cu-doped UiO-66, 22 Bi 2 O 2 S/ZnO, 24 In 2 O 3 /BiOBr, 25 layered bimetallic oxides (LBMOs) and their hybrid materials. 4,26–28 However, the agglomeration of LBMOs often occurs during the photocatalytic degradation process, which impairs its photocatalytic efficiency and cycle times, 26,27,29–31 further hindering its application in practical processes. Therefore, LBMOs were hybridized with multiwalled carbon nanotubes, 26 fly ashes, 27 waste biomass-derived carbon, 30 or biochar/Ag 3 PO 4 31 to inhibit their photo corrosion and enhance their photocatalytic activity, which expands the practical applications of LBMOs for the removal of organic pollutants, and more hybridized LBMO materials are expected to be developed in the future.…”