In Situ Synthesis of C–Doped BiOBr Micron‐Flower by Structural Induction of Sodium Alginate for Rapid Removal Tetracycline

C‐doped into the BiOBr is a big challenge because unique lattice structure. Here, using sodium alginate (SA) as the structure‐directing agent and C source, the C‐doped BiOBr micron‐flower (BiOBr‐SA) was in‐situ synthesized with KBr and Bi(NO3)3 with hydrothermal, and characterized by XRD, SEM, XPS, BET and DRS. It was found that SA could control morphology of BiOBr‐SA as it contains carboxylate groups. Meanwhile, C−Bi bonds were formed in nanosheets, and further self‐assembled into BiOBr‐SA micron‐flower. Using BiOBr‐SA as photocatalyst for degradation of antibiotic and dye, the removal rate of tetracycline got to 88.7%. Using sodium alginate (SA) as the structure‐directing agent, C was in‐situ doped into the unique lattice structure of BiOBr successfully for the first time. C−Bi bonds were formed in nanosheets, and further self‐assembled into BiOBr‐SA micron‐flower, which afforded the C‐doped BiOBr micron‐flower (BiOBr‐SA). The resulting BiOBr‐SA was used for photocatalytic degradation of tetracycline (TC), a typical antibiotic, and the removal rate got to 88.7%.