Anchoring of semiconductor and metal nanoparticles on single layers 2-D materials (graphene oxide and molybdenum disulfide) by a solution processable procedure allows the convenience of creating a multifunctional catalyst mat with the ability to both detect and degrade toxins. A photocatalytic activation method has been used to deposit metal nanoparticles on semiconductor / graphene films, resulting in the formation of SERS active surface for detection and reduction of low-level organic contaminants. Manipulation of photoinduced charge transfer processes on a graphene based catalyst mat allows tailoring of the properties for photocatalytic and sensing applications. The role of the graphene is to establish electronic communication between semiconductor and metal nanoparticles while promoting adsorption of molecules near the nanoparticle surface. Further implementation of 2-D single to few layered molybdenum disulfide nanosheets is studied. Environmental remediation can be achieved by employing these multifunction catalyst mats to concentrate, detect, and degrade organic contaminants via photoinduced chemical reactions.

Multifunction chemical sensors designed on 2D nanomaterials for detection and degradation of low-level contaminants

250th National Meeting (2015)

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