1. A novel Z-scheme NH2-MIL-125(Ti)/Ti3C2 QDs/ZnIn2S4 photocatalyst with fast interfacial electron transfer properties for visible light-driven antibiotic degradation and hydrogen evolution.
- Author
-
Liu, Shiben, Jiang, Xiaohui, Waterhouse, Geoffrey I.N., Zhang, Zhi-Ming, and Yu, Liang-min
- Subjects
- *
CHARGE exchange , *PHOTODEGRADATION , *INTERSTITIAL hydrogen generation , *ANTIBIOTICS , *LIQUID chromatography-mass spectrometry , *HYDROGEN evolution reactions , *WATER purification , *HYDROGEN - Abstract
[Display omitted] • A Z-scheme Ti-MOF/QDs/ZIS photocatalyst was fabricated. • The Ti-MOF/QDs/ZIS shows outstanding photocatalytic antibiotics degradation performance. • The Ti-MOF/QDs/ZIS exhibits excellent photocatalytic hydrogen evolution activity. • Ti-MOF/QDs/ZIS was very stable and easily recycled for reuse. • A possible mechanism for Ti-MOF/QDs/ZIS photocatalyst was proposed. Herein, a novel all-solid-state Z-scheme NH 2 -MIL-125(Ti)/Ti 3 C 2 MXene quantum dots/ZnIn 2 S 4 (Ti-MOF/QDs/ZIS) photocatalyst was prepared, then applied for photocatalytic antibiotic (tetracycline and sulfamethazine) degradation and hydrogen evolution under visible light. The Z-scheme Ti-MOF/QDs/ZIS photocatalyst afforded very efficient degradation of tetracycline (TC, 96% in 50 min) and sulfamethazine (SMZ, 98% in 40 min), as well as a high rate of hydrogen generation (2931.9 μmol g-1 h−1) under visible light irradiation. Trapping studies showed superoxide radicals (•O 2 −) to be the main active species for antibiotic degradation, with the intermediates formed during antibiotic photo-oxidation identified by liquid chromatography-mass spectrometry. Photocatalyst recycling studies showed the Z-scheme composite photocatalyst to be stable during both antibiotic photodegradation and hydrogen generation experiments. The Ti 3 C 2 MXene quantum dots facilitated electron transfer between the semiconducting components of Z-scheme composite photocatalyst. This work identifies a promising new Z-scheme photocatalyst system for water purification and solar hydrogen production. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF