期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 294, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2022.121094
关键词
Z-scheme photocatalyst; NH2-MIL-125(Ti)/Ti3C2 MXene quantum dots/ZnIn2S4; Antibiotics degradation; Hydrogen evolution
资金
- National Key Research and Development Project [2019YFC0312102, 2019YFC0312101]
- NSFC-Shandong Joint Fund [U1706225]
- James Cook Research Fellowship from New Zealand Government
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Dodd Walls Centre for Photonic and Quantum Technologies - Ministry of Business, Innovation and Employment [C05X2007]
- New Zealand Ministry of Business, Innovation & Employment (MBIE) [C05X2007] Funding Source: New Zealand Ministry of Business, Innovation & Employment (MBIE)
A novel all-solid-state Z-scheme photocatalyst was prepared and applied for photocatalytic antibiotic degradation and hydrogen evolution under visible light. Ti3C2 MXene quantum dots facilitated electron transfer between the semiconducting components, resulting in efficient degradation of antibiotics and high rate of hydrogen generation. This work presents a promising new photocatalyst system for water purification and solar hydrogen production.
Herein, a novel all-solid-state Z-scheme NH2-MIL-125(Ti)/Ti3C2 MXene quantum dots/ZnIn2S4 (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 mu mol g(-1) h(-1)) under visible light irradiation. Trapping studies showed superoxide radicals (center dot 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 photo degradation and hydrogen generation experiments. The Ti3C2 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.
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