Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 269, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2021.118724
Keywords
Prussian blue; Photothermal conversion; Photo-thermal Fenton; Hierarchical structure
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Funding
- National Natural Science Foundation of China [51673209, 51973230]
- Zhejiang Provincial Natural Science Foundation of China for Distinguished Young Scholars [LR20E030002]
- Ten thousand planhigh level talents special support plan of Zhejiang province, China [ZJWR0108020]
- Youth Innovation Promotion Association of Chinese Academy of Science [2014258]
- Ningbo Municipal Bureau of Science and Technology [2019C50028]
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Solar-driven photocatalysis using Prussian blue microcrystals with different morphologies shows improved catalytic efficiency, broader sunlight absorption, and enhanced photothermal conversion properties, leading to effective organic pollutants removal.
Solar-driven photocatalysis is considered to be a green and efficient approach for organic pollutants removal, however improving solar utilization and conversion still faces great challenge. Herein, Prussian blue (PB) microcrystals with different morphologies including PB-cube, PB-flower and PB-ball are fabricated via a secondaryassembly strategy. PB-ball with hierarchical structure possesses more exposed crystal faces, more mesopores, and higher FeII content, rendering its higher catalytic efficiency for organic pollutants degradation. Besides, structured hierarchical morphology leads to higher and broader sunlight absorption, which efficiently improves photo-Fenton performance of PBs due to the higher photon utilization. More importantly, we demonstrate that PBs with photothermal conversion property largely promotes its Fenton reaction rate under solar irradiation, and PBs as nano heat source in the photothermal Fenton system can accelerate the substance diffusion, charge carrier movement, as well as active radical generation. Thus, coupling of photo-Fenton and photothermal of dualfunction catalyst is an appealing strategy for organic pollutants removal.
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