10.1021/acsami.9b01095.s003
Wenjuan Liu
Wenjuan
Liu
Hongbin Ge
Hongbin
Ge
Xiao Chen
Xiao
Chen
Xiaolong Lu
Xiaolong
Lu
Zhongwei Gu
Zhongwei
Gu
Jinxing Li
Jinxing
Li
Joseph Wang
Joseph
Wang
Fish-Scale-Like
Intercalated Metal Oxide-Based Micromotors
as Efficient Water Remediation Agents
American Chemical Society
2019
surface area
Fish-Scale-Like Intercalated Metal Oxide-Based Micromotors
azo-dye waste solution
MnO 2 surface structure
Fe-related Fenton reaction
FSI micromotor treatment
5 nm nanoparticles
ramsdellite MnO 2
Fe 2 O 3
water remediation applications
Mn 2 O 3
Efficient Water Remediation Agents
nanomaterial
2019-04-08 00:00:00
Media
https://acs.figshare.com/articles/media/Fish-Scale-Like_Intercalated_Metal_Oxide-Based_Micromotors_as_Efficient_Water_Remediation_Agents/8010845
With
compelling virtues of a large specific surface area, abundant
active sites, and fast interfacial transport, nanomaterials have been
demonstrated to be indispensable tools for water remediation applications.
Accordingly, micro/nanomotors made by nanomaterials would also benefit
from these properties. Though tuning the surface architecture on demand
becomes a hot topic in the field of nanomaterials, there are still
limited reports on the design of active surface architectures in chemically
driven tubular micro/nanomachines. Here, a unique architecture composed
of a fish-scale-like intercalated (FSI) surface structure and an active
layer with 5 nm nanoparticles is constructed, which composes of Fe<sub>2</sub>O<sub>3</sub> and ramsdellite MnO<sub>2</sub>, Mn<sub>2</sub>O<sub>3</sub>, in the tubular micromotor using a versatile electrodeposition
protocol. Tailoring the electrodeposition parameters enables us to
modulate the active MnO<sub>2</sub> surface structure on demand, giving
rise to a pronounced propulsion performance and catalytic activity.
Upon exposure to the azo-dye waste solution, the degradation efficacy
greatly raises by around 22.5% with FSI micromotor treatment when
compared to the normal compact motors, owing to the synergistic effect
between the Fe-related Fenton reaction and a large catalytic area
offered by the hierarchically rough inner surface. Such unique micromachines
with a large active surface area have great potential for environmental
and biomedical applications.