Abstract
Aqueous phase exfoliation of defect free graphene sheets is achieved employing nicotine based non-cytotoxic surface active ionic liquid (SAIL). The SAIL stabilizing the graphene acts as template, reducing agent and precursor of Br− ions for in-situ preparation of of Ag/AgBr janus nanoparticles (JNPs) decorating graphene sheets under sunlight within 5 min of exposure, for the first time. Thus, prepared Ag/AgBr@Graphene nanocomposite (NC) shows 2.4–3.0 fold enhancement in photocatalytic activity towards degradation of an antibiotic, ciprofloxacin and Rhodamine-B dye, respectively in water under sunlight/visible light as compared to Ag/AgBr JNPs and other reported photocatalysts. Greater adsorption of contaminated molecules at Ag/AgBr@Graphene NC along with good elctron-hole separation lead to enhanced photocatalytic activity as compared to Ag/AgBr JNPs
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