Premium
Superhydrophobic and oleophilic micro‐nano hierarchical Pd‐decorated SiO 2 layers
Author(s) -
Kim JaeHun,
Mirzaei Ali,
Kim Hyoun Woo,
Kim Sang Sub
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15561
Subject(s) - materials science , nano , chemical engineering , contact angle , microscale chemistry , nanoparticle , morphology (biology) , deposition (geology) , nanotechnology , ultraviolet , surface finish , surface roughness , composite material , optoelectronics , paleontology , mathematics education , mathematics , sediment , biology , genetics , engineering
This paper reports a novel fluorinated micro‐nano hierarchical Pd‐decorated SiO 2 structure (hereafter called Pd/SiO 2 ), which was formed by the deposition of Pd nanoparticles ( NP s) on SiO 2 microspheres. The SiO 2 layers with microscale roughness were fabricated by electrospraying a solution prepared using the sol‐gel process. Subsequently, the Pd NP s were deposited using an ultraviolet reduction process. The resulting surfaces exhibited a micro‐nano hierarchical morphology. After fluorination, the micro‐nano hierarchical surface exhibited outstanding water repellency with a water contact angle ( WCA ) of 170° and a sliding angle <5°, indicating excellent superhydrophobic properties. The layers exhibited good long‐term durability and excellent ultraviolet resistance. Interestingly, the surface was oleophilic ( CA of oil ~10°). These results show the potential of employing superhydrophobic fluorinated Pd/SiO 2 layers in smart devices, such as self‐cleanable surfaces and intelligent water/oil separation systems.