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Eco-friendly Synthesis of Silver Nanoparticles and its Application in Hydrogen Photogeneration and Nanoplasmonic Biosensing |
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| Authors: | Guilherme B Strapasson Eduarda de C Flach Dr Marcelo Assis Prof Silma A Corrêa Prof Elson Longo Dr Giovanna Machado Prof Jacqueline F L Santos Prof Daniel E Weibel |
| Institution: | 1. Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970 Porto Alegre, RS, Brazil
These authors contributed equally to this work Contribution: Data curation (equal), Formal analysis (equal), ?Investigation (equal), Methodology (equal);2. Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970 Porto Alegre, RS, Brazil;3. Department of Analytical and Physical Chemistry, University Jaume I (UJI), Castelló, 12071 Spain Contribution: Data curation (supporting), Methodology (supporting);4. CDMF, Federal University of Sao Carlos - UFSCar, P.O. Box 676, 13565e905 São Carlos, São Paulo, Brazil Contribution: Funding acquisition (supporting), Project administration (supporting), Resources (supporting);5. Centro de Tecnologias Estratégicas do Nordeste (CETENE), Av. Prof. Luís Freire, n° 01 – CidadeUniversitária, Recife/PE, 50.740-545 Brazil;6. Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970 Porto Alegre, RS, Brazil Contribution: Conceptualization (supporting), Formal analysis (supporting), ?Investigation (supporting), Methodology (supporting), Writing - review & editing (supporting) |
| Abstract: | Environmentally friendly methods for silver nanoparticles (AgNPs) synthesis without the use of hazardous chemicals have recently drawn attention. In this work, AgNPs have been synthesized by microwave irradiation using only honey solutions or aqueous fresh pink radish extracts. The concentrations of honey, radish extract, AgNO3 and pH were varied. AgNPs presented mean sizes between 7.0 and 12.8 nm and were stable up to 120 days. The AgNPs were employed as co-catalyst (TiO2@AgNPs) to increase the hydrogen photogeneration under UV-vis and only visible light irradiation, when compared to pristine TiO2 NPs. The prepared photocatalyst also showed hydrogen generation under visible light. Additionally, AgNPs were used to assemble a nanoplasmonic biosensor for the biodetection of extremely low concentrations of streptavidin, owing to its specific binding to biotin. It is shown here that green AgNPs are versatile nanomaterials, thus being potential candidates for hydrogen photogeneration and biosensing applications. |
| Keywords: | Honey radish extract hydrogen microwave nanoplasmonic biosensor |