resumo
The development of highly efficient strategy to facilitate comprehensive charge transmission and effective spatial charge separation is expected as a promising approach to improve photocatalytic performance. Herein, the Fe (III) doping modified AgI/NH2-MIL-68(In/Fe) Z-scheme heterojunction (ANM-x composite) with unique internal and interfacial charge transmission performance was fabricated by a facile ion exchange precipitation method. The optimized ANM-50 composite exhibits the maximum photocatalytic activity for the degradation of tetra-cycline, which is about 9.54, 2.61 and 1.86 times higher than that of pure NH2-MIL-68In, NH2-MIL-68(In/Fe) and AgI, respectively. The characterization results displayed that Ag nanoparticles (NPs) were generated during the photocatalytic procedure, which not only served as a charge transfer-highway, but also reduced the charge flow energy barrier, thereby accelerating charge transfer efficiency and consolidating the stability of the Z-scheme heterojunction. Mechanism exploration reflected that the superior photocatalytic performance was associated with synergetic effect among the introduced Fe(III), constructed ANM Z-scheme heterojunction and the gener-ated Ag NPs, which significantly expands visible light response range and promotes more effective internal and interfacial charge separation. This research not only designs an efficient photocatalyst for decomposing tetra-cycline, but also opens a new perspective for rational developing Z-scheme heterojunction with unique internal and interfacial charge flow steering.
palavras-chave
METAL-ORGANIC FRAMEWORK; TETRACYCLINE HYDROCHLORIDE; DEGRADATION; MECHANISM; FABRICATION; REDUCTION; HYDROGEN; LIGAND; WATER; ELECTROCATALYSTS
categoria
Chemistry; Materials Science; Physics
autores
Wei, JM; Wang, Q; He, M; Li, S; Zhang, YA; Yang, Y; Luo, SP; Fu, LS; Wang, X; 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 Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX22_3032), the College Students Training Program of Innovation and Entrepreneurship of Jiangsu Province (202211463016Z), the Changzhou Sci&Tech Program (CZ20210029) and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 19KJA460001). 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 XRD.