resumo
Unstable contact interface, inferior charge transmission efficiency and low redox capability significantly inhibit the photocatalytic property of heterojunctions. Herein, a stable AgCl/NH2-MIL-68In Z-scheme heterojunction that couples with plasmonic Ag nanoparticles (NPs) to promote efficient long-range charge separation is rationally designed. This heterostructure is successfully fabricated by the in-situ growth of AgCl and Ag NPs on the surface and framework of NH2-MIL-68In via a facile ion exchange precipitation approach. Benefiting from the surface plasmon resonance (SPR) effect of Ag NPs and the interfacial heterojunction, the visible light response is enhanced and the recombination rate of photogenerated charges is weakened. Impressively, the artificial Zscheme heterojunction exhibits superior photocatalytic activity for levofloxacin degradation. Furthermore, the adjustment of the AgCl and Ag NPs loading ratio of NH2-MIL-68In further improves the photocatalytic degradation activity of levofloxacin (0.0222 min-1), which is much higher than that of pure NH2-MIL-68In (k = 0.00121 min-1) and AgCl (k = 0.00093 min-1). This work not only develops an effective photocatalyst for the degradation of organic pollutants, but also provides a promising sight for feasible designing the more stable Zscheme heterojunction with efficient charge separation efficiency.
palavras-chave
METAL-ORGANIC FRAMEWORKS; VISIBLE-LIGHT; PHOTOCATALYTIC DEGRADATION; CHARGE-TRANSFER; WASTE-WATER; CONSTRUCTION; PERFORMANCE; MIL-68(IN); REDUCTION; HYDROGEN
categoria
Materials Science; Optics
autores
He, M; Chen, J; Yang, Y; Hu, XR; Jiang, ZR; Yan, Y; Sun, JY; Fu, LS; Wei, JM; Yang, TH
nossos autores
Lianshe Fu
Investigador AuxiliarProjectos
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
agradecimentos
This work was supported by the National Natural Science Foundation of China (No. 51872140 & 51973173) , the College Students Training Program of Innovation and Entrepreneurship of Jiangsu Province (202211463016Z) and the Changzhou Sci&Tech Program (CZ20210029) . This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Foundation for Science and Technology/MCTES. We also thank the Analytical and Testing Center at Jiangsu University of Technology for measuring PXRD.