| Abstrakt: |
The development of ternary composites has gained great interest as they can be used as a catalyst in environmental remediation due to the transfer between different semiconductor nanoparticles because the difference in the band edge positions creates a potential gradient at the composite interface. Herein, for the first time, we reported a novel CuO@Ag@Bi2S3 ternary composite as a Z-scheme catalyst via homogeneous precipitation of Ag particles onto CuO and Bi2S3 by an ultrasonication method, wherein CuO nanoparticles were fabricated from the reduction of a Cu(II)–Schiff base complex. In the ternary composite, ∼10 nm Ag particles were uniformly dispersed on Bi2S3 and surrounded by CuO NPs, as demonstrated by TEM. Compared to the binary structures Ag@CuO, Ag@Bi2S3, and CuO@Bi2S3, the CuO@Ag@Bi2S3 ternary composite exhibits remarkably efficient catalytic activity for the removal of HIV drugs such as stavudine and zidovudine, and degradation of environmental pollutants (MB/RhB/MB + RhB, monocrotophos, and 4-nitrophenol). The framework of the formation of the composite, semiconductor behavior, high surface area, lowering of the electron–hole recombination, and the formation of a large number of ˙OH radicals are the crucial factors for the outstanding degradation of drugs and environmental pollutants by the CuO@Ag@Bi2S3 ternary composite through a Z-scheme mechanism. This work reveals that the CuO@Ag@Bi2S3 ternary composite is efficient at catalyzing not only the degradation of organic pollutants but also the removal of drugs, which might pave the way for its direct use in industry for environmental remediation. [ABSTRACT FROM AUTHOR] |
