Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 414, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.125487
Keywords
TiO2; Visible-light-driven photocatalysis; Photothermal; Particle-level heterojunction; Surface plasmon resonance
Categories
Funding
- National Natural Science Foundation of China [21871078, 51672073]
- Natural Science Foundation of Heilongjiang Province [JQ2019B001, B2018010]
- Heilongjiang Postdoctoral Startup Fund [LBH-Q14135]
- Heilongjiang University Science Fund for Distinguished Young Scholars [JCL201802]
- Heilongjiang Provincial Institutions of Higher Learning Basic Research Funds Basic Research Projects [KJCX201909]
- Youth Science and Technology Innovation Team Project of Heilongjiang Province [2018-KYYWF-1593]
- Young Innovative Team Supporting Projects of Heilongjiang Province
- Heilongjiang Touyan Innovation Team Program
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Plasma Cu-decorated TiO2-x/CoP photocatalysts exhibit excellent photocatalytic-photothermal performance, with enhanced carrier transfer rate and extended photoresponse range through surface engineering and Ti3(+) and oxygen vacancy defects. The particle-level hierarchical heterojunction architecture and surface plasma resonance effect contribute to the spatial charge separation and high efficiency of photocatalytic degradation rates for toxic pollutants.
Plasma Cu-decorated TiO2-x/CoP particle-level hierarchical heterojunction photocatalysts with surface engineering were fabricated through solvothermal and solid phase reduction strategies. The CoP nanoparticles not only serve as a cost-effective cocatalyst but also provide abundant surface active sites, which facilitate rapid transfer of photogenerated carriers. The Ti3(+) and oxygen vacancy defects extend photoresponse from UV to visible light region, and enhance the separation efficiency of photogenerated carriers efficiently. Because of surface plasma resonance (SPR) of Cu, Cu/TiO2-x/CoP with average particle size of 100-200 nm has significant photothermal effect, in which the temperature of Cu/TiO2-x/CoP is increased by 76 degrees C with irradiation for 30 s, similar to 8 times higher than that of the original TiO2. Cu/TiO2-x/CoP exhibits a high photocatalytic degradation rates for highly toxic 2,4-dichlorophenol (99.2%) and 2,4,6-trichlorophenol (98.5%), which higher 7.6 and 8.9 times than the initial TiO2, respectively. Thanks to the particle-level hierarchical heterojunction, the efficient surface engineering and SPR effect favoring the spatial charge separation, Cu/TiO2-x/CoP shows excellent photocatalytic-photothermal Performance. This particle-level hierarchical heterojunction architectural design provides a new insight for synthesizing particulate photocatalysts with high-efficiency.
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