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Near infrared-light responsive WS2 microengines with high-performance electro- And photo-catalytic activities

AuthorsAsunción-Nadal, Víctor de la; Jurado-Sánchez, Beatriz; Vázquez, Luis ; Escarpa, Alberto
KeywordsPhoto-catalytic activities
Issue Date2019
PublisherRoyal Society of Chemistry (UK)
CitationChemical Science 11: 132- 140 (2019)
Abstract[EN] Tungsten disulfide (WS)-based micromotors with enhanced electrochemical and photo-catalytic activities are synthesized using a greatly simplified electrochemical deposition protocol at room temperature involving exclusively tungstic acid and sulfate as metal and sulfur sources without further building chemistry. The WS-based micromotors exhibit dual electrochemical and photo-catalytic behavior in the inner and outer layers, respectively, due to the combination of the unique properties of the sp hybridized WS outer layer with highly reactive WS-induced inner catalytic layers, accounting for this material's exclusive enhanced performances. A rough inner Pt-Ni layer allows tailoring the micromotor propulsion, with a speed increase of up to 1.6 times after external control of the micromotor with a magnetic field due to enhanced fuel accessibility. Such a coupling of the attractive capabilities of WS with enhanced micromotor movement holds considerable promise to address the growing energy crisis and environmental pollution concerns.
Publisher version (URL)http://dx.doi.org/10.1039/c9sc03156a
Identifiersdoi: 10.1039/c9sc03156a
e-issn: 2041-6539
issn: 2041-6520
Appears in Collections:(ICMM) Artículos
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