Journal
CHEMICAL ENGINEERING JOURNAL
Volume 460, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.141842
Keywords
0D; 3D AgI; MOF-808; Photocatalytic; One-photon excitation; Condensed FuKui function
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The synthesis of a unique 0D/3D AgI/MOF-808 composite showed that one-photon excitation pathway improved photon utilization effectiveness. The composite exhibited excellent adsorption and photocatalytic properties for tetracycline hydrochloride degradation.
One-photon excitation has been demonstrated to be ideal for improving photon utilization effectiveness. We synthesized a unique 0D/3D AgI/MOF-808 composite using a hydrothermal method combined with in situ precipitation. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations indicated the electron migration direction, confirming the presence of a one-photon excitation pathway. The 0D/3D AgI/ MOF-808 exhibited both excellent adsorption (189.01 mg/g) and photocatalytic properties for tetracycline hy-drochloride (TCH). Electrochemical and photoluminescence (PL) tests showed that 0D/3D AgI (40 wt%)/MOF-808 had the highest photogenerated carrier transport and separation efficiency, with a TCH degradation effi-ciency of 83.02 % and a degradation rate 14.32 times higher than that of bare AgI. Photon utilization efficiency, carrier separation, and adsorption capacity expansion all contributed to the photocatalytic performance. The effects of pH and inorganic anions on the composite photocatalyst during the photocatalytic reaction were also investigated. The capture experiment demonstrated that .OH and .O2- were the primary active groups. Addi-tionally, the stability was enhanced because the migration of electrons in AgI effectively limited the reduction of Ag+ to Ag0. Possible attack sites during TCH degradation were predicted using the condensed FuKui function (CFF), and potential degradation pathways were determined using ultrahigh-performance liquid chromatogra-phy-tandem mass spectrometry (UHPLC-MS/MS). The examination of the biotoxicity of TCH degradation in-termediates demonstrated a reduction in their environmental risks.
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