期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 245, 期 -, 页码 290-301出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.12.051
关键词
Solar conversion; Zn2In2S5; Ti3C2(O OH)(x); Interface; Built-in quasi-alloying effect
资金
- Singapore Ministry of Education Academic Research Funds [MOE2014-T2-2-074, ARC16/15, 2015-T1-001-023, RG7/15]
- GSK (GlaxoSmithKline) - EDB (Economic Development Board) Trust Fund
- Joint Singapore-Germany Research Project Fund [SGP-PROG3-019]
- Projects of the National Nature Science Foundation of China [21776066, 51708195]
Exploring new hybridized catalysts for synergistically promoting the photocatalytic efficiency hold great challenges in solar-to-chemical energy conversion and environmental remediation. Hierarchical Zn2In2S5/Ti3C2(O, OH),, hybrids have been rationally constructed using Ti3C2(O, OH) as a two-dimensional platform for in situ growth of flower-like Zn2In2S5 microsphere under anaerobically hydrothermal conditions. Upon exposure to visible light, the Zn2In2S5/Ti3C2(O, OH) hybrids with the Ti3C2(O, OH),, content of 1.5% (by mass) had hydrogen generation yields of 12,983.8 timol g(-1), which was significantly better than that of pure Zn2In2S5. The apparent quantum efficiency reached 8.96% at 420 nm. Furthermore, the photocatalytic tetracycline removal rate was-1.25 times higher than that of pure Zn2In2S5, and can be further improved with the increase of temperature in the range of 35-55 C. Excellent photocatalytic activity originated from the synergistic effects between visible-light-active Zn2In2S5 and conductive Ti3C2(O, OH) for spatial electrical promotion. The photogenerated-electrons transfer efficiency from Zn2In2S5 to Ti3C2(O, OH),, was 33.0%. In accordance with spectroscopic, electrochemical, and density functional theory studies, we proposed that the interfacial-built-in quasi alloying effect between ZIS and Ti3C2(O, OH) culminated in notable charge redistribution, which thereby facilitated the spatial separation and transfer of photogenerated electron-hole pairs. This work revealed the underlying photo-excited charge transfer between metallic compound and semiconductor.
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