A green synthesis of gold–palladium core–shell nanoparticles using orange peel extract through two-step reduction method and its formaldehyde colorimetric sensing performance
| Autor: | Widya P. Rini, Arif Hidayat, Grandprix T.M. Kadja, Tribidasari A. Ivandini, Della Amalia, Wiyogo Prio Wicaksono, Latifatul Uyun, Desi Nasriyanti, Harits Atika Ariyanta, Rifaldi Lutfi Fahmi, Shery G.V. Leun |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Orange Peel extract Formaldehyde Shell (structure) Nanoparticle chemistry.chemical_element Infrared spectroscopy 02 engineering and technology Core shell nanoparticles 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Absorbance chemistry.chemical_compound chemistry General Materials Science Physical and Theoretical Chemistry 0210 nano-technology Palladium Nuclear chemistry |
| Zdroj: | Nano-Structures & Nano-Objects. 24:100535 |
| ISSN: | 2352-507X |
| DOI: | 10.1016/j.nanoso.2020.100535 |
| Popis: | Gold–palladium core–shell nanoparticles (Au@PdNPs) have been successfully synthesized through a two-step facile and green method. HAuCl4 and H2PdCl4 were used as the precursors, while orange peel extract (OPE) was used as both reducing and stabilizing agent. Initially, OPE was used to synthesize the gold core nanoparticles (AuNPs), followed by the reduction of PdCl 4 2 − solution to produce the Pd shell. The synthesized nanoparticles showed a strong visible absorbance at 534 nm indicated the formation of AuNPs at an optimum water/OPE ratio of 16.67, while the formation of Au@PdNPs was indicated by the disappearance of the peak at 534 nm. Further characterization by using IR spectroscopy indicated that –OH groups of OPE plays the main role in the nanoparticles formation, while TEM images observed a core–shell structure of the Au@PdNPs with an average core diameter of 40 nm and an average shell thickness of 7 nm. In the presence of different formaldehyde concentrations, the core–shell nanoparticles showed a clear color change from light to dark brown. Linearity of the absorbance responses from the formaldehyde concentration range of 36.3 mM to 3.63 M (R2 = 0.991) was achieved with an estimated LOD of 304.9 mM, suggested that the developed nanoparticles are promising to be applied for formaldehyde sensing. |
| Databáze: | OpenAIRE |
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