Sorption of gold nanorods on polyurethane foam as a way to obtain a nanocomposite material with a surface plasmon resonance for chemical analysis purposes

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A method for preparing a nanocomposite material containing gold nanorods on a polyurethane foam matrix, which is of interest in analytical chemistry, has been developed by the sorption modification of the matrix. It is found that the sorption of gold nanorods on polyurethane foam was achieved after 30 min of phase contact in the presence of 0.4 M NaCl as an electrolyte. The dependence of the sorption on time is described by the pseudo–first order kinetic equation with a rate constant of 0.17 min^–1. The sorption isotherm is fitted by the Langmuir equation. Calculated in the framework of this model, values of the sorption constant and the sorption capacity are equal to 77.6 × 10³ L/mol of Au and 15 mg/g, respectively. The potential possibility of the resulting nanocomposite material application for determining reducing agents by diffuse reflectance spectrometry is demonstrated.