1. In situ synthesis of gold nanoparticles on novel nanocomposite lactose/alginate: Recyclable catalysis and colorimetric detection of Fe(III)
- Author
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Thanh-Danh Nguyen, T. Kim-Dung Hoang, T. Thu-Trang Ho, T. Kim-Chi Huynh, and Chi-Hien Dang
- Subjects
Polymers and Plastics ,Alginates ,Surface Properties ,Metal Nanoparticles ,Lactose ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Ferric Compounds ,Catalysis ,Nanocomposites ,Rhodamine ,chemistry.chemical_compound ,Limit of Detection ,Spectroscopy, Fourier Transform Infrared ,Materials Chemistry ,Methyl orange ,Fourier transform infrared spectroscopy ,Particle Size ,Coloring Agents ,Nanocomposite ,Organic Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Microscopy, Electron ,Biodegradation, Environmental ,chemistry ,Colloidal gold ,Reagent ,Colorimetry ,Gold ,0210 nano-technology ,Dispersion (chemistry) ,Water Pollutants, Chemical ,Nuclear chemistry - Abstract
This work presents a simply new method for in situ synthesis of gold nanoparticles (AuNPs) using the biodegradable polysaccharides. A novel composite of lactose/alginate (Lac/Alg) could be prepared easily through ionotropic gelation mechanism which can reduce in situ gold ions into AuNPs. Lactose plays a crucial role as a reducing reagent which are demonstrated by FTIR analysis. The crystalline structure of AuNPs with a mean size of 10 nm has been confirmed by analysis techniques. The nanocomposite powder possesses highly catalytic performance for degradation of contaminants including 4-nitrophenol, methyl orange, rhodamine 6 G and rhodamine B. The dispersion solution of AuNPs@Lac/Alg was used as an effective probe for highly selective detection of Fe3+ ions. The detection mechanism replies on the aggregation of nanocomposite in the presence of Fe3+ ions. LOD value was found to be 0.8 μM in a linear range of 2.0–80.0 μM.
- Published
- 2020